Latest Articles from Acta Ichthyologica et Piscatoria Latest 100 Articles from Acta Ichthyologica et Piscatoria https://aiep.pensoft.net/ Thu, 28 Mar 2024 15:12:18 +0200 Pensoft FeedCreator https://aiep.pensoft.net/i/logo.jpg Latest Articles from Acta Ichthyologica et Piscatoria https://aiep.pensoft.net/ Dynamics of fish community structure in the Yeosu Coast, Korea: A comprehensive analysis of daily set-net catch data during 2008–2022 https://aiep.pensoft.net/article/112388/ Acta Ichthyologica et Piscatoria 54: 75-86

DOI: 10.3897/aiep.54.112388

Authors: Seong Yong Moon, Mi Hee Lee, Kyung-Mi Jung, Myung Sung Koo

Abstract: This study focuses on the Yeosu Coast, a critical ecological and economic zone on the Korean Peninsula. We conducted a comprehensive analysis of fish data obtained from daily set nets for the period of 2008–2022 (excluding 2017) to investigate variations in fish composition and community structure over a 15-year period. The catches were characterized by a prevalence of warm-water fish species, reflecting the temperate and subtropical character of the Yeosu Coast. The total catch during the study period was 3210.8 tonnes, with 2010 and 2016 registering the highest and lowest catches, respectively. Our analysis identified sea surface temperature as a primary factor correlated with these changes in species composition. The two dominant species, Scomberomorus niphonius (Cuvier, 1832) and Engraulis japonicus Temminck et Schlegel, 1846 together accounted for a remarkable 78.9% of the total catch. Notably, the Shannon–Weaver diversity index values were lower in 2015 than in 2008, indicating potential shifts in the community structure. Our analysis identified sea surface temperature as the most dominant factor that influenced these changes in species composition. Furthermore, we highlight the significant threats posed by climate change and the increasing number of jellyfish challenging fisheries on the Yeosu Coast. These threats have the potential to result in diminished set-net catches and declining biodiversity within this valuable ecosystem. Our findings underscore the importance of monitoring and addressing these ecological shifts to ensure the long-term sustainability of Yeosu Coast fisheries.

HTML

XML

PDF

]]>
Research Article Fri, 15 Mar 2024 14:42:32 +0200
Reproductive features of data-deficient yellowfin snapper, Lutjanus xanthopinnis (Actinopterygii: Eupercaria: Lutjanidae), from east-coast of Peninsular Malaysia: Implications for sustainable fisheries management https://aiep.pensoft.net/article/112995/ Acta Ichthyologica et Piscatoria 54: 63-74

DOI: 10.3897/aiep.54.112995

Authors: Md Moshiur Rahman, Nur Asma Ariffin, Ying Giat Seah, Tun Nurul Aimi Mat Jaafar, Muhammad Hanif Fadzli, Ahasan Habib

Abstract: Understanding the reproductive biology of fishes is crucial to making accurate and scientifically sound recommendations for fisheries management. The presently reported study is the first to report the reproductive characteristics of the data-deficient and recently described yellowfin snapper, Lutjanus xanthopinnis Iwatsuki, Tanaka et Allen, 2015, collected from the eastern South China Sea, Malaysia. A total of 572 fish specimens were sampled monthly from March 2022 to April 2023 using a gillnet and a trawl net. Subsequently, these specimens were measured and weighed. Their total length (TL) ranged from 15.3 to 26.8 cm (19.25 ± 2.04 cm; mean ± SD). Their body weight (WB) ranged from 53.5 g to 279.7 g (114.5 ± 40.3 g; mean ± SD). For the reproductive biology study, the following parameters were determined: the sex ratio, gonadosomatic index (GSI), hepatosomatic index (HSI), spawning period, fecundity, condition factor (K), length at maturity, and the gonadal maturity stages. In the sex ratio, males (M) were significantly dominant over females (F) (M:F = 1:0.75) (χ2 = 11.18). Consequently, the monthly mean GSI of pooled sex revealed a consistent trend from January to August, indicating spawning seasons with peak periods in March and April. The batch fecundity of 67 mature females (16.0–25.2 cm TL; 64.5– 279.3 g W), was determined to range from 16 405 to 94 357 oocytes. The fecundity increased with gonad weight in contrast to weight and length. The length at first maturity of females and males was 14.53 and 20.56 cm, respectively. Females matured earlier than males. Macroscopic and histological examination of gonads revealed monthly variation in the ratio of gonad stages for males and females. This study offers crucial data on the reproductive biology of L. xanthopinnis, which will help with sustainable fishery management in this area and can be used as a reference for the management of similar fish populations in other regions of the world.

HTML

XML

PDF

]]>
Research Article Mon, 26 Feb 2024 18:14:07 +0200
Identification of pen shells (Bivalvia: Ostreida: Pinnidae) collected off northern Iloilo, Philippines using their morphological characters https://aiep.pensoft.net/article/112465/ Acta Ichthyologica et Piscatoria 54: 49-61

DOI: 10.3897/aiep.54.112465

Authors: Cheryl Jela, Harold M. Monteclaro, Nathaniel C. Añasco, Gerald F. Quinitio, Ricardo P. Babaran

Abstract: This study describes morphological characteristics of pen shells collected along the coast of northern Iloilo, Philippines. A total of 380 pen shell individuals with intact shells and their adductor muscles were carefully examined and measured. Eleven species were studied, namely: Atrina pectinata (Linnaeus, 1767), Atrina inflata (Dillwyn, 1817), Atrina vexillum (Born, 1778), Atrina seminuda (Lamarck, 1819), Atrina rigida ([Lightfoot], 1786), Pinna bicolor Gmelin, 1791, Pinna atropurpurea Sowerby, 1825, Pinna deltodes Menke, 1843, Pinna muricata Linnaeus, 1758, Pinna incurva Gmelin, 1791, and Pinna nobilis Linnaeus, 1758. The species were identified based on the nine characteristics of the valve for the genus Pinna and eight for the genus Atrina. These characteristics were then correlated with their adductor muscles’ morphology. Analysis of variance revealed that the three most dominant species investigated under genus Atrina, namely Atrina pectinata, Atrina inflata, and Atrina vexillum, were found to be significantly different in the eight characters of the valve (P < 0.05). Moreover, three representative Pinna species, Pinna bicolor, Pinna atropurpurea, and Pinna deltodes, were significantly (P < 0.05) different based on shell width, dorsal posterior shell margin, sulcus width, and dorsal posterior margin to dorsal nacreous margin. The observed high correlation (P < 0.05) between adductor muscle properties and different shell length characteristics for five dominant species can be used as a predictor of growth and suggests that the increase in the size of adductor muscle correlates to the increase in the size of the mentioned shell characteristics. No previous study of this kind was conducted in the Philippines. This work provides relevant information for related biological research on other pen shell species and for the management of pen shell resources in northern Iloilo and, possibly, other regions in the world.

HTML

XML

PDF

]]>
Research Article Mon, 19 Feb 2024 08:31:20 +0200
Evaluation of large-scale marking with alizarin red S in different age rainbow trout fry for nonlethal field identification https://aiep.pensoft.net/article/117547/ Acta Ichthyologica et Piscatoria 54: 43-48

DOI: 10.3897/aiep.54.117547

Authors: Jan Turek, Pavel Lepič, Adam Bořík, Petra Galicová, Petra Nováková, Mladen Avramović, Tomáš Randák

Abstract: Fry of rainbow trout, Oncorhynchus mykiss (Walbaum, 1792), was subjected to one-hour and four hours immersion in Alizarin red S (ARS) bath 150 mg · L–1. The experiment involved seven age groups (40, 50, 60, 70, 80, 90, and 100 days) and was conducted to estimate the minimal age of salmonids for mass marking with ARS bath enabling subsequent effective, simple field nonlethal identification, based on fin rays checking. The fish were examined at the ages of 200 and 300 days. The results showed a high retention level of ARS traces in caudal fin rays ensured satisfactory visibility and quick detection. A success rate of marking detection was >90% at 200 and 300 days of age and the fish were immersed in ARS solution from 60 days of age (685°D). This treatment provided better results in fish bathed for four hours. Recognition of marks using a laser pointer and protective glasses was successful even in fish, with a 3.5–5.0 times length increase compared to the marking time. The results indicate a high potential for ARS marking and its field identification for juvenile salmonids, which can significantly expand the possibilities of field experiments.

HTML

XML

PDF

]]>
Research Article Tue, 13 Feb 2024 07:07:37 +0200
First Southern Hemisphere record of the longnosed stargazer, Ichthyscopus lebeck (Actinopterygii: Perciformes: Uranoscopidae) https://aiep.pensoft.net/article/113513/ Acta Ichthyologica et Piscatoria 54: 37-41

DOI: 10.3897/aiep.54.113513

Authors: Gino V. Limmon, Kunto Wibowo, Teguh Peristiwady, Ruby V. Kusumah, Muhammad Afrisal

Abstract: Two specimens (290.2 and 309.5 mm in standard length) of the longnosed stargazer, Ichthyscopus lebeck (Bloch et Schneider, 1801), were recently collected from Jakarta Bay, Jakarta, Indonesia. Described more than two centuries ago, I. lebeck has hitherto been documented exclusively from the Northern Hemisphere, encompassing the Arabian Sea, southern coastal India, the Bay of Bengal, the Andaman Sea, and Singapore. The present paper documents the first record of the species in the Southern Hemisphere. Detailed descriptions of these specimens are provided, contributing valuable insights into the characteristics of I. lebeck in the newly reported locality.

HTML

XML

PDF

]]>
Short Communication Mon, 5 Feb 2024 07:37:41 +0200
Relations between morphological traits and body weight of shortbelly eel, Dysomma anguillare (Actinopterygii: Anguilliformes: Synaphobranchidae), from coastal waters of Zhoushan, East China Sea, determined by multivariate analyses https://aiep.pensoft.net/article/114014/ Acta Ichthyologica et Piscatoria 54: 27-36

DOI: 10.3897/aiep.54.114014

Authors: Ziyan Zhu, Tianyan Yang, Sige Wang

Abstract: The shortbelly eel, Dysomma anguillare Barnard, 1923, is an essential component in the food chain of the marine ecosystem and plays an important role in nearshore fisheries and biodiversity in the East China Sea. In order to provide theoretical support for fishery resource assessment and sustainable utilization of D. anguillare, an important bycatch in the offshore area of China, the relations between morphological traits and body weight were investigated based on the measurement of 28 metric traits for the first time. The correlation analysis showed that 25 morphological traits were significantly (P < 0.05) correlated with the logarithm of body weight (lgX0), in which the correlation coefficient of the total length (X1) was the largest with the extremely high significance (P < 0.01). The optimum multiple regression equation of morphological traits was constructed after deleting redundant independent variables: lgX0 = 0.367 + 0.003X1 + 0.010X7 – 0.010X8 + 0.011X10 + 0.042X14 + 0.006X15 + 0.024X19 – 0.004X23. The total length (X1) had the highest positive direct relation with lgX0 (0.699), which was in accordance with the results of determinate coefficient analysis, while the indirect effect of body height (X7) through lower jaw length (X19) to lgX0 was the greatest. The gray correlation analysis indicated that body length (X2) and distance from snout to dorsal fin origin (X22) were the most closely related to body weight. The comprehensive comparison showed that X1, X2, and X22 should be used as the ideal morphometric traits for measuring the body weight of D. anguillare, and the conclusions obtained from this study will provide valuable references for fishery resource management of this commercial fish species.

HTML

XML

PDF

]]>
Research Article Wed, 31 Jan 2024 18:13:31 +0200
First record of Triacanthidae Bleeker, 1859 (Actinopterygii: Tetraodontiformes) from the Red Sea https://aiep.pensoft.net/article/115071/ Acta Ichthyologica et Piscatoria 54: 21-25

DOI: 10.3897/aiep.54.115071

Authors: M. P. Goutham-Bharathi, T. K. Sirajudheen, Ronald Grech Santucci, Ronald Fricke, Mark Dimech

Abstract: The Tetraodontiform family Triacanthidae Bleeker, 1859 is recorded for the first time from the Red Sea. Fishing experiments employing a commercial shrimp trawler off Jizan, Saudi Arabia, revealed species occurrences of short-nosed tripodfish, Triacanthus biaculeatus (Bloch, 1786) at depths ranging from about 11 to 34 m. Currently, this species has only been found in shallow sandy/muddy habitats in the southern Red Sea. Further surveys are imperative to demonstrate the actual distribution of short-nosed tripodfish across a wider range of environmental gradients along the Red Sea.

HTML

XML

PDF

]]>
Short Communication Mon, 29 Jan 2024 14:39:31 +0200
Genetic diversity of three consecutive selective breeding generations in Pseudobagrus vachellii (Actinopterygii: Siluriformes: Bagridae) https://aiep.pensoft.net/article/105627/ Acta Ichthyologica et Piscatoria 54: 13-20

DOI: 10.3897/aiep.54.105627

Authors: Huan Wang, Guoqing Duan, Huaxing Zhou

Abstract: Pseudobagrus vachellii (Richardson, 1846) is a commercially important freshwater fish species in China. To understand the effects of artificial breeding on the genetic diversity of three consecutive P. vachellii breeding populations (F1, F2, and F3) since 2012, a genetic analysis was conducted using polymorphic microsatellite markers. The mean allele number, expected heterozygosity, observed heterozygosity, and the polymorphic information content from generation F1 to F3 decreased from 7.75 to 5.63, from 0.77 to 0.63, from 0.83 to 0.77, and from 0.72 to 0.58, respectively. Analysis of molecular variance showed greater genetic divergence within the three generations (93.67%) than that among the generations (6.33%), and the overall differentiation level was moderate. Additionally, the lowest genetic differentiation was between F2 and F3 (Fst = 0.0484), and the highest was between F1 and F3 (Fst = 0.12864). Inbreeding occurred in each generation and was the highest in generation F3. Structural analysis showed that the three P. vachellii generations were most likely divided into two different genetic clusters. Although genetic diversity declined slightly in the mass selection lines after three breeding generations, overall genetic diversity was maintained at a relatively high level. To minimize the loss of genetic diversity and inbreeding in the subsequent breeding process, a moderate number of parents can be used for each generation. Information regarding the genetic diversity and structure of the selective P. vachellii breeding generations obtained in this study will be useful for future broodstock management and selective breeding programs.

HTML

XML

PDF

]]>
Research Article Mon, 29 Jan 2024 14:37:50 +0200
Feeding habits of Pacific anchovy, Engraulis japonicus (Actinopterygii: Clupeiformes: Engraulidae), captured off the southern coasts of Korea https://aiep.pensoft.net/article/109601/ Acta Ichthyologica et Piscatoria 54: 1-11

DOI: 10.3897/aiep.54.109601

Authors: Seong Yong Moon, Heeyong Kim

Abstract: Understanding the feeding ecology of anchovies in the southern waters of Korea is crucial for improving ecosystem management. However, to date, few studies have examined seasonal changes in the diet of Pacific anchovy, Engraulis japonicus Temminck et Schlegel, 1846, in Korean waters, with the majority of these focusing on the larval and adult stages. The presently reported study provides updates on the feeding habits of E. japonicus off the southern coast of Korea. We analyzed 347 individuals. One-way analysis of similarity was performed to evaluate the differences in diet composition among size classes and seasons of E. japonicus, and correspondence analysis was conducted using the matrix of the percentage by number (%N) data for prey with occurrence of less than 10% to determine the distribution of prey across all size classes and each season. The diet of E. japonicus was investigated according to season and four size classes. The fork length of these specimens ranged from 5.4 to 14.1 cm. A total of 55 prey taxa of varying sizes between 0.33 mm (diatom Coscinodiscus spp.) and 5.8 mm (fish larvae) were recorded. Anchovies were exclusively planktivorous, and copepods were the most common prey, comprising 82.1% of the identified food items and 84.3% of anchovy stomach contents analyzed. However, their occurrence and abundance varied according to season and Pacific anchovy size class. According to the percentage of the index of relative importance (%IRI), the most important prey items were the copepods Calanus sinicus (48.0%), Paracalanus orientalis (31.7%), bivalve larvae (5.8%), Ditrichocorycaeus affinis (4.2%), and calanoid copepods (2.4%). Analysis of similarities and similarity percentage analysis indicated that a distinct diet of Pacific anchovy in the southern waters of Korea is potentially driven by differences in hydrological conditions. Correspondence analysis revealed that anchovies had the most significant impact on the differences between size classes. The results deepen our understanding of prey species diversity and intraspecific food competition off the southern coast of Korea.

HTML

XML

PDF

]]>
Research Article Thu, 18 Jan 2024 14:19:43 +0200
A checklist of dead fishes (Actinopterygii and Elasmobranchii) associated with the algal bloom event of the summer of 2022 on the Yucatan coasts, southern Gulf of Mexico https://aiep.pensoft.net/article/112253/ Acta Ichthyologica et Piscatoria 53: 263-270

DOI: 10.3897/aiep.53.112253

Authors: Rosalía Aguilar-Medrano, María Eugenia Vega-Cendejas, Ariel A. Chi Espínola

Abstract: Harmful algal blooms (HABs) are natural phenomena that occur when colonies of microalgae grow out of control and produce toxic or harmful effects on the surrounding fauna. In August 2022, an HAB, dominated by the diatom, Cylindrotheca closterium (Ehrenberg) Reimann et J.C. Lewin, 1964, occurred on the Yucatan coast, southern Gulf of Mexico. In the presently reported study, two photo transects were established along the coastline, one at the onset of the bloom, at Telchac port, and the other at the final phase of the event, at Chixchulub port. The affected fish species were documented photographically and a taxonomic list, with their abundance, density, and biomass is presented, as well as a summary of the affected ecosystems according to the affinity of these species. A total of 54 species were recorded; 48 in Telchac and 21 in Chicxulub, with 15 species occurring at both sites. The affected species have a greater affinity to reef systems, beaches, and estuaries, in that order, between 3 m and 113 m depth. In the International Union for the Conservation of Nature (IUCN) nomenclature, the majority of the species are in the “least concern” category, however, species were also recorded in the “near threatened”, “vulnerable”, and “endangered” categories. Therefore, it is extremely important to monitor these events and report the affected species, since the increase in the frequency of these phenomena due to local and global factors can have significant repercussions on species endemic to the coastal zone.

HTML

XML

PDF

]]>
Short Communication Fri, 29 Dec 2023 07:33:03 +0200
TNF-Α, IL-6, HSP-70, fish growth hormone, and growth performance of sea trout, Salmo trutta (Actinopterygii: Salmoniformes: Salmonidae) after long-term dietary administration of β-glucan and BGN-2 https://aiep.pensoft.net/article/113220/ Acta Ichthyologica et Piscatoria 53: 253-261

DOI: 10.3897/aiep.53.113220

Authors: Olga Revina, Vjačeslavs Revins, Dina Cīrule, Anda Valdovska

Abstract: The presently reported study intended to examine the effect of the oral administration of an immunomodulator β-glucan and β-glucan-containing product (BGN-2) on the levels of tumor necrosis factor-alpha (TNF-α), interleukin-6 (IL-6), fish heat shock protein 70 (HSP-70), and fish growth hormone (GH) as well as growth performance of cultured sea trout juveniles. The sea trout is a migratory sea-run brown trout, Salmo trutta Linnaeus, 1758. The fish (total of 15 000) were divided into four experimental and one control group including control (consisting of basal diet) (D1); basal diet + 1 g kg–1 β-glucan (D2); basal diet + 3 g kg–1 β-glucan (D3); basal diet + 6 g kg–1 BGN-2 (D4); basal diet + 14 g kg–1 BGN-2 (D5). The fish fed D4 and D5 diets showed significantly higher IL-6, HSP-70, and GH expression levels than other treatments (P < 0.05). Sea trout fed D4 and D5 diets showed significant improvements in growth performance compared to the fish fed the control diet. In conclusion, our results suggest that dietary supplementation with the product BGN-2 provides great immunostimulation and could be used as an effective measure to improve growth performance in juvenile sea trout.

HTML

XML

PDF

]]>
Research Article Thu, 14 Dec 2023 08:34:00 +0200
New records of two cusk eels of the genus Neobythites from Taiwan, with a northward range extension of N. australiensis Nielsen, 2002 (Actinopterygii: Ophidiiformes: Ophidiidae) https://aiep.pensoft.net/article/114798/ Acta Ichthyologica et Piscatoria 53: 243-251

DOI: 10.3897/aiep.53.114798

Authors: Yo Su, Hsiu-Chin Lin, Hsuan-Ching Ho

Abstract: Two species of cusk eels, Neobythites australiensis Nielsen, 2002 and Neobythites japonicus Uiblein et Nielsen, 2023 were collected from southwestern and northeastern Taiwan, respectively. They represent the first record of both species from Taiwan. The former specimen represents the first record from the Northern Hemisphere, and the latter specimen represents the second record of N. japonicus. As a result, eight species of Neobythites are recognized in Taiwan. We provide a detailed description of the two specimens, comparison with other available specimens, discussion of intraspecific variations, and a dichotomous key to species of Neobythites in Taiwan.

HTML

XML

PDF

]]>
Research Article Thu, 7 Dec 2023 14:38:04 +0200
Comparative phylogeography of two codistributed species of the genus Herichthys (Actinopterygii: Cichliformes: Cichlidae) in northeastern Mexico https://aiep.pensoft.net/article/112183/ Acta Ichthyologica et Piscatoria 53: 227-242

DOI: 10.3897/aiep.53.112183

Authors: Fabian Pérez-Miranda, Omar Mejía, Benjamín López, Eduardo Soto-Galera, Amairany Bernal-Portillo, Wilfredo A. Matamoros

Abstract: Phylogeographic patterns of freshwater fishes in coastal regions are highly susceptible to eustatic sea level changes associated with Pleistocene glaciations. In this context, the Plain Coastal Gulf in northeastern Mexico represents an ideal study area due to its low elevation. Herein, we compare the phylogeographic structures of two cichlid species of the genus Herichthys Baird et Girard, 1854 widely distributed in the Pánuco–Tamesí system in northeastern Mexico using two mitochondrial markers. The species studied were: Herichthys carpintis (Jordan et Snyder, 1899) and Herichthys pantostictus (Taylor et Miller, 1983). We estimate their genetic diversity, gene flow, and demographic history and perform biogeographic reconstructions using a Bayesian computation approach and environmental niche modeling. The biogeographic reconstruction suggests a different history for each species. Environmental niche modeling indicates that both species experienced a demographic expansion during the Pleistocene but responded differently to Pleistocene climatic changes. In summary, their current sympatric distribution could be the outcome of contemporary and not historical processes reflecting a pseudo-incongruent pattern.

HTML

XML

PDF

]]>
Research Article Thu, 7 Dec 2023 14:37:23 +0200
Two new records of moray eels representing genera Gymnothorax and Strophidon (Actinopterygii: Anguilliformes: Muraenidae) from the Philippines https://aiep.pensoft.net/article/108838/ Acta Ichthyologica et Piscatoria 53: 217-226

DOI: 10.3897/aiep.53.108838

Authors: Roxanne A. Cabebe-Barnuevo, El Andro A. Obar, Dianne Frances A. Penuela, Hiroyuki Motomura, Ricardo P. Babaran, Maria Celia D. Malay

Abstract: In this study, we report the collection of moray eel species Gymnothorax nudivomer (Günther, 1867) and Strophidon dorsalis (Seale, 1917) from the Western Visayas region, Philippines. Both represent new records for the country. A single specimen of G. nudivomer measuring 619 mm total length (TL) was collected from Iloilo Fish Port Complex, Iloilo and a specimen of S. dorsalis measuring 777 mm TL was collected from the fish market of Batan, Aklan. Detailed morphological descriptions and mitochondrial cytochrome oxidase I (COI) barcode sequences are provided. A comprehensive list of geographic records for both species, as well as a list of all species representing the genera Gymnothorax and Strophidon reported in the Philippines is also provided in this report.

HTML

XML

PDF

]]>
Research Article Fri, 24 Nov 2023 12:24:09 +0200
Redescription and extended distribution of a poorly known Australian anchovy, Stolephorus advenus (Actinopterygii: Clupeiformes: Engraulidae) https://aiep.pensoft.net/article/109943/ Acta Ichthyologica et Piscatoria 53: 209-216

DOI: 10.3897/aiep.53.109943

Authors: Harutaka Hata, Hiroyuki Motomura

Abstract: The false Indian anchovy, Stolephorus advenus Wongratana, 1987 (Engraulidae), previously known only from the type specimen from the Northern Territory, Australia, is redescribed herewith and its validity confirmed, on the basis of the holotype and nine additional specimens from the northern coast of Australia. Although the significance of differences between S. advenus and some congeners with a similarly short maxilla has been unclear, the diagnostic reliability of some characters, including melanophores absent on the dorsal- and anal-fin bases, pectoral fin and occipital region, fewer pseudobranchial filaments, and greater number of prepelvic scutes, is confirmed. An extended distribution of the species around the northern coast of Australia is also reported.

HTML

XML

PDF

]]>
Research Article Fri, 24 Nov 2023 09:47:28 +0200
Length–weight relations of 44 fish species (Actinopterygii) inhabiting an unprotected tropical coastal biological corridor of Yucatan, Mexico https://aiep.pensoft.net/article/110519/ Acta Ichthyologica et Piscatoria 53: 201-207

DOI: 10.3897/aiep.53.110519

Authors: María Eugenia Vega-Cendejas, Mirella Hernández de Santillana, Sonia Palacios-Sánchez

Abstract: Length–weight relations (LWRs) were estimated for 44 fish species, representing 23 families, collected from an unprotected coastal biological corridor of the Yucatan Peninsula. The following species were studied (in alphabetical order): Acanthostracion quadricornis (Linnaeus, 1758); Albula vulpes (Linnaeus, 1758); Anchoa hepsetus (Linnaeus, 1758); Anchoa lamprotaenia Hildebrand, 1943, Anchoa lyolepis (Evermann et Marsh, 1900), Anchoa mitchilli (Valenciennes, 1848); Archosargus rhomboidalis (Linnaeus, 1758); Ariopsis felis (Linnaeus, 1766); Bagre marinus (Mitchill, 1815); Bairdiella chrysoura (Lacepède, 1802); Caranx latus Agassiz, 1831; Chaetodipterus faber (Broussonet, 1782); Chriodorus atherinoides Goode et Bean, 1882; Cynoscion arenarius Ginsburg, 1930; Elops saurus Linnaeus, 1766; Eucinostomus argenteus Baird et Girard, 1855; Eucinostomus gula (Quoy et Gaimard, 1824); Eucinostomus harengulus Goode et Bean, 1879; Harengula jaguana Poey, 1865; Hyporhamphus unifasciatus (Ranzani, 1841); Lagodon rhomboides (Linnaeus, 1766); Lutjanus griseus (Linnaeus, 1758); Menticirrhus americanus (Linnaeus, 1758); Menticirrhus littoralis (Holbrook, 1847); Menticirrhus saxatilis (Bloch et Schneider, 1801); Mugil curema Valenciennes, 1836; Mugil trichodon Poey, 1875; Oligoplites saurus (Bloch et Schneider, 1801); Opisthonema oglinum (Lesueur, 1818); Opsanus beta (Goode et Bean, 1880); Orthopristis chrysoptera (Linnaeus, 1766); Prionotus tribulus Cuvier, 1829; Rypticus maculatus Holbrook, 1855; Selene vomer (Linnaeus, 1758); Sphoeroides spengleri (Bloch, 1785); Sphoeroides testudineus (Linnaeus, 1758); Strongylura notata (Poey, 1860); Strongylura timucu (Walbaum, 1792); Symphurus plagiusa (Linnaeus, 1766); Synodus foetens (Linnaeus, 1766); Trachinotus carolinus (Linnaeus, 1766); Trachinotus falcatus (Linnaeus, 1758); Trachinotus goodei Jordan et Evermann, 1896; Urobatis jamaicensis (Cuvier, 1816). A new maximum standard length (SL) was recorded for Anchoa lamprotaenia. Positive allometric growth was reported in ten species, negative allometric growth in sixteen species, and isometric growth in eighteen species.

HTML

XML

PDF

]]>
Short Communication Fri, 24 Nov 2023 09:31:50 +0200
The invasive mollusk Rapana venosa (Mollusca: Neogastropoda: Muricidae) in the mid-southern Black Sea: Distribution, growth, and stock structure https://aiep.pensoft.net/article/113745/ Acta Ichthyologica et Piscatoria 53: 191-199

DOI: 10.3897/aiep.53.113745

Authors: Murat Dağtekin

Abstract: The rapa whelk, Rapana venosa (Valenciennes, 1846), known also as the veined rapa whelk or the Asian rapa whelk, settled in the Black Sea in 1940 and within the past 30 years has become an important economic contribution to local fishers along the coastline. This study examines the annual change in biomass, population structure, and interaction of the species with the ecosystem of rapa whelk in the mid-southern Black Sea. The samples were collected monthly in 2011 and 2012 by hydraulic dredge at different sites. Stock biomass was estimated at five different subregions and along four depth contours. In 2012 the biomass of rapa whelk increased significantly in in all subregions compared with the previous year sampling. Food availability is the main factor for species distribution, and in parallel, striped Venus clams, Chamelea gallina (Linnaeus, 1758), the main food source for rapa whelks, was significantly concentrated in the study area. The von Bertalanffy growth parameters (VBGP) were expressed as Lt = 121.78(1 − e−0.246(t + 0.33)). As a fisheries management point, our results highlight the overpopulation of rapa whelk in the region.

HTML

XML

PDF

]]>
Research Article Tue, 31 Oct 2023 23:04:26 +0200
New developments in the analysis of catch time series as the basis for fish stock assessments: The CMSY++ method https://aiep.pensoft.net/article/105910/ Acta Ichthyologica et Piscatoria 53: 173-189

DOI: 10.3897/aiep.53.105910

Authors: Rainer Froese, Henning Winker, Gianpaolo Coro, Maria-Lourdes "Deng" Palomares, Athanassios C. Tsikliras, Donna Dimarchopoulou, Konstantinos Touloumis, Nazli Demirel, Gabriel M. S. Vianna, Giuseppe Scarcella, Rebecca Schijns, Cui Liang, Daniel Pauly

Abstract: Following an introduction to the nature of fisheries catches and their information content, a new development of CMSY, a data-limited stock assessment method for fishes and invertebrates, is presented. This new version, CMSY++, overcomes several of the deficiencies of CMSY, which itself improved upon the “Catch-MSY” method published by S. Martell and R. Froese in 2013. The catch-only application of CMSY++ uses a Bayesian implementation of a modified Schaefer model, which also allows the fitting of abundance indices should such information be available. In the absence of historical catch time series and abundance indices, CMSY++ depends strongly on the provision of appropriate and informative priors for plausible ranges of initial and final stock depletion. An Artificial Neural Network (ANN) now assists in selecting objective priors for relative stock size based on patterns in 400 catch time series used for training. Regarding the cross-validation of the ANN predictions, of the 400 real stocks used in the training of ANN, 94% of final relative biomass (B/k) Bayesian (BSM) estimates were within the approximate 95% confidence limits of the respective CMSY++ estimate. Also, the equilibrium catch-biomass relations of the modified Schaefer model are compared with those of alternative surplus-production and age-structured models, suggesting that the latter two can be strongly biased towards underestimating the biomass required to sustain catches at low abundance. Numerous independent applications demonstrate how CMSY++ can incorporate, in addition to the required catch time series, both abundance data and a wide variety of ancillary information. We stress, however, the caveats and pitfalls of naively using the built-in prior options, which should instead be evaluated case-by-case and ideally be replaced by independent prior knowledge.

HTML

XML

PDF

]]>
Research Article Mon, 30 Oct 2023 09:40:09 +0200
Graded levels of dietary pink oyster mushroom, Pleurotus djamor meal, affect growth, feed efficiency, lipase activity, and fiber content in final whole body of fingerlings of the Nile tilapia, Oreochromis niloticus (Actinopterygii: Cichliformes: Cichlidae) https://aiep.pensoft.net/article/105367/ Acta Ichthyologica et Piscatoria 53: 163-172

DOI: 10.3897/aiep.53.105367

Authors: Mario Eduardo Sosa, Silvia Cappello-García, Rafael Martínez-García, Susana Camarillo-Coop, Rocío Guerrero-Zarate, Otilio Méndez-Marín, Carlos Alfonso Álvarez-Gonzaléz, Uriel Rodríguez-Estrada

Abstract: The presently reported study was aimed to determine the effects of graded levels of dietary pink oyster mushroom (Pleurotus djamor) meal (POMM), in growth, feed efficiency, protein utilization, digestive enzymes activities, and whole-body proximate composition of Nile tilapia, Oreochromis niloticus (Linnaeus, 1758), fingerlings (0.3 ± 0.01 g). The experimental design included a control diet (POMM0) formulated with soybean meal, as the main protein source, and four diets designed with increasing levels of POMM: 25% (POMM25); 50% (POMM50); 75% (POMM75); and 100% (POMM100). Experimental diets were administered to 420 fish, randomly distributed in 15, 100-L tanks. The feeding experiment lasted 45 days. Diets and the final whole body were submitted to a proximate composition analysis. Growth, feed efficiency, protein utilization, and digestive enzyme activities were assessed. Compared to POMM0 and POMM25, weight gain (WG), and specific growth rate (SGR), significantly (P < 0.05) decreased in fish that were fed POMM50, POMM75, and POMM100%. Feed conversion ratio (FCR), protein efficiency ratio (PER), and survival rate (SR) were not significantly affected by experimental diets. Daily feed intake (DFI), and daily protein intake (DPI), decreased as POMM increased in diets. Compared to POMM0 experimental group, condition factor (K), showed a significantly higher value in fish that were fed POMM50, and POMM100 experimental diets. Crude fiber of the final whole body of POMM100 resulted in significantly higher (P < 0.05) compared to that shown in fish fed the rest of the experimental diets. Acid and alkaline proteases, trypsin, chymotrypsin, leucine aminopeptidase, and amylase of Nile tilapia fingerlings, were not significantly affected by experimental diets. Compared to fish fed POMM0 and POMM25 diets, experimental fish fed POMM50, POMM75, and POMM100 showed a reduction in lipase activity. In conclusion, a POMM level higher than 25% affects growth and lipase activity. While a POMM level higher than 50% affects fiber content in a whole body of the final fish.

HTML

XML

PDF

]]>
Research Article Mon, 23 Oct 2023 19:06:37 +0300
First record of two fish species (Actinopterygii) in the Sukhyi Lyman, northwestern Black Sea, Ukraine https://aiep.pensoft.net/article/111525/ Acta Ichthyologica et Piscatoria 53: 157-162

DOI: 10.3897/aiep.53.111525

Authors: Serhii Khutornoi, Mikhail O. Son, Yuriy Kvach

Abstract: Two new fish species were recorded while monitoring the fish fauna of Sukhyi Lyman (or Sukhyi Estuary), an estuary in the northwestern Black Sea (Ukraine) close to the marine port of Chornomorsk. A single pumpkinseed, Lepomis gibbosus (Linnaeus, 1758), was observed in May 1999, followed by numerous observations in May 2021, while a single peacock blenny, Salaria pavo (Risso, 1810), was photographed during snorkeling observations in September 2021. The estuary is a known hub for invasive alien species and other neobionts due to the presence of the marine port. The new population of pumpkinseed, a North American invasive species, in the estuary represents the next stage in the species’ ongoing expansion along the Ukrainian Black Sea coast. Likewise, the appearance of the peacock blenny represents the latest stage in the “Mediterranization” of the Black Sea, a process that has been ongoing over the last several thousand years.

HTML

XML

PDF

]]>
Short Communication Thu, 12 Oct 2023 08:11:56 +0300
Infection parameters of Norileca indica and a new record of Ceratothoa carinata (Crustacea: Isopoda: Cymothoidae) on Selar crumenophthalmus (Actinopterygii: Carangiformes: Carangidae) in the waters of the Sibuyan Sea, the Philippines https://aiep.pensoft.net/article/108918/ Acta Ichthyologica et Piscatoria 53: 147-155

DOI: 10.3897/aiep.53.108918

Authors: Sanny David P. Lumayno, Hannah Kathleen S. Labrador, Kyle Dominic E. Barnuevo, Roxanne A. Cabebe-Barnuevo, Rowena E. Cadiz, Ricardo P. Babaran

Abstract: Studies on cymothoid isopods as parasites affecting the marine fisheries and aquaculture industries are relatively scarce in the Philippines despite having detrimental impacts on their fish hosts. Parasitological examination on the bigeye scad, Selar crumenophthalmus (Bloch, 1793), a potential aquaculture species, in the waters of the Sibuyan Sea, Philippines was done on fish specimens collected on 21 April 2021. Out of the 88 specimens, a total of 13 big eye scads were infected with cymothoid isopod Norileca indica (Milne Edwards, 1840), found in the branchial cavities of the fish, resulting in a prevalence of 14.77%. A total of 20 individual isopods (13 females and seven males) were recovered, with a mean intensity of 1.53. Based on the morphological characteristics and as confirmed by the cytochrome oxidase subunit 1 (CO1) sequence, one host fish was also infected with Ceratothoa carinata (Bianconi, 1869). This appears to be the first record of C. carinata from the Philippines. To fully understand the implications of cymothoid parasites on the bigeye scad, further studies are recommended to account for the impacts of seasonality, reproductive stages of the host fish, and effects of abiotic factors such as water movement and depth.

HTML

XML

PDF

]]>
Research Article Fri, 6 Oct 2023 11:56:34 +0300
A new record of Upeneus pori (Actinopterygii: Syngnathiformes: Mullidae) from the South China Sea: Integrating morphology and DNA barcoding https://aiep.pensoft.net/article/103343/ Acta Ichthyologica et Piscatoria 53: 137-145

DOI: 10.3897/aiep.53.103343

Authors: Zhisen Luo, Murong Yi, Sui Gu, Hung-Du Lin, Yunrong Yan

Abstract: This study constitutes the first record of the Por’s goatfish, Upeneus pori Ben-Tuvia et Golani, 1989, from the South China Sea. This fish had formerly only been reported in the western Indian Ocean. Six specimens of U. pori collected from the South China Sea were identified through comparisons of morphology and molecular analysis. Upeneus pori and Upeneus tragula Richardson, 1846 are very similar. The difference is that the former has seven spines in the first dorsal fin, lacks any spots or blotches on its body, and exhibits white or creamy white barbels. The latter has eight spines in the first dorsal fin, exhibits black spots on its body, and displays orange-colored barbels, along with different caudal fin patterns. Pairwise genetic distance computation demonstrated that U. pori exhibits a very low genetic distance from sequences of the other three recorded U. pori species found in the type locality of Israel, Red Sea, as documented in GenBank. These findings provide compelling evidence of the Por’s goatfish’s presence in the South China Sea.

HTML

XML

PDF

]]>
Research Article Mon, 2 Oct 2023 10:01:00 +0300
Length–weight relations for 19 freshwater fish species (Actinopterygii) from the lowland Elbe River, Germany https://aiep.pensoft.net/article/107199/ Acta Ichthyologica et Piscatoria 53: 129-135

DOI: 10.3897/aiep.53.107199

Authors: Janek Simon, Wolf-Christian Lewin, Erik Fladung

Abstract: Monthly and mean length–weight relations (LWRs) were calculated for 19 freshwater fish species from the middle section of the lowland Elbe River (Germany): Abramis brama (Linnaeus, 1758); Alburnus alburnus (Linnaeus, 1758); Anguilla anguilla (Linnaeus, 1758); Ballerus ballerus (Linnaeus, 1758); Blicca bjoerkna (Linnaeus, 1758); Cobitis taenia Linnaeus, 1758; Esox lucius Linnaeus, 1758; Gobio gobio (Linnaeus, 1758); Gymnocephalus cernua (Linnaeus, 1758); Leuciscus aspius (Linnaeus, 1758); Leuciscus idus (Linnaeus, 1758); Leuciscus leuciscus (Linnaeus, 1758); Lota lota (Linnaeus, 1758); Perca fluviatilis Linnaeus, 1758; Romanogobio albipinnatus (Lukasch, 1933); Rutilus rutilus (Linnaeus, 1758); Sander lucioperca (Linnaeus, 1758); Scardinius erythrophthalmus (Linnaeus, 1758); and Squalius cephalus (Linnaeus, 1758). The values of the exponent b in the LWR W = aTLb ranged from 2.882 (Lota lota) to 3.517 (Cobitis taenia) and the correlation coefficient (r2) was greater than 0.96 for all species except for Cobitis taenia with 0.93. The relations allow for the accurate estimation of weight from length data with reduced handling times of fish in the field while enabling comparisons with other regions and future studies. The calculated LWRs together with species-specific abundance and catch data will be useful for fisheries modeling and estimating population status and related fish species protection, especially for the endangered species in the Elbe River.

HTML

XML

PDF

]]>
Short Communication Fri, 8 Sep 2023 08:56:05 +0300
First record of Mastacembelus notophthalmus (Actinopterygii: Synbranchiformes: Mastacembelidae) for Belitung Island, Indonesia https://aiep.pensoft.net/article/105318/ Acta Ichthyologica et Piscatoria 53: 123-127

DOI: 10.3897/aiep.53.105318

Authors: Veryl Hasan, Lucas O. Vieira, Josie South, Felipe P. Ottoni

Abstract: This study was conducted aiming to record for the first time the occurrence of Mastacembelus notophthalmus Roberts, 1989 in Belitung Island (Indonesia), and update the geographic distribution of this species. Although this species is categorized as LC according to the IUCN Red List, it is rarely reported in fish inventories, with few specimens sampled. Moreover, data on the geographic distribution, population size, and other population details of M. notophthalmus are scarce and insufficient to predict possible threats and propose appropriate conservation measures and policies. A single specimen of Mastacembelus was collected using a fish trap on 20 February 2023, in a swamp, located in the middle course of the Lenggang River, Belitung Island, Indonesia. This specimen was identified as M. notophthalmus and this finding constitutes the southernmost record for this species, expanding its geographic range. In addition, the new record site is about 700 km south-east of the nearest locality in Peninsular Malaysia, about 250 km south-east of the nearest locality in Bangka Island, about 600 km south-east of the nearest locality in Sumatra, and about 500 km south-west from the nearest locality in Borneo. Better ecological and biological data concerning distribution, habitat, and stressors is crucial to reassess the conservation status of M. notophthalmus, and possible future conservation measures and policies. Therefore, we emphasize here the urgency for more comprehensive and accurate data to facilitate conservation assessments and management in Indonesia.

HTML

XML

PDF

]]>
Research Article Fri, 14 Jul 2023 19:39:38 +0300
New records of ray-finned fishes (Actinopterygii) from Puerto Morelos Reef National Park (Mexican Caribbean) https://aiep.pensoft.net/article/101239/ Acta Ichthyologica et Piscatoria 53: 107-122

DOI: 10.3897/aiep.53.101239

Authors: Francisco Martínez-Servín, Yareli Margarita López-Arroyo, Aurora Lizeth Moreno-Vázquez, D. Ross Robertson, Alfrancis Teresa Arredondo-Chávez, Juan Antonio Sánchez-Jiménez, Oscar Gabriel Ávila-Morales, Xavier Madrigal-Guridi, Jose Adan Caballero-Vázquez, Juan J. Schmitter-Soto, Omar Domínguez-Domínguez, María Gloria Solís-Guzmán

Abstract: We documented the nearshore ray-finned fishes in Puerto Morelos Reef National Park (PMRNP) by sampling 57 localities, including rocky intertidal pools, sandy bottoms, Thalassia beds, coral reefs, artificial reefs, karstic-slab bottoms, demersal-pelagic areas, and sessile-Sargassum patches. We recorded seven species new to Caribbean Mexican waters and one hundred and six species new to the PMRNP, most of which are small cryptobenthic reef fish. The resultant checklist includes 349 species, and specimens of 285 of which (81.7%) have been deposited in an ichthyological museum collection. These include both voucher organisms and with tissue samples for genetic analysis. A comparison with inventories at other localities of the Greater Caribbean indicates that more targeted sampling for cryptobenthic and deep-reef fishes is needed to provide a complete inventory. We also comment on the local use of some species as fishery resources.

HTML

XML

PDF

]]>
Research Article Fri, 23 Jun 2023 09:52:15 +0300
Parasites as biological tags of divergence of black-striped pipefish, Syngnathus abaster (Actinopterygii: Syngnathiformes: Syngnathidae), populations in their natural and acquired range https://aiep.pensoft.net/article/103246/ Acta Ichthyologica et Piscatoria 53: 95-105

DOI: 10.3897/aiep.53.103246

Authors: Volodymyr Yuryshynets, Yuriy Kvach, Iryna Syniavska, Oleksandra Shevchenko, Yuliia Kutsokon

Abstract: The presently reported study was intended to describe the current range of an Atlanto–Mediterranean fish, the black-striped pipefish, Syngnathus abaster Risso, 1827, in Ukrainian waters and to analyze biological tags (size parameters and parasites) of its different populations. The parasitological survey was carried at five different localities, including one marine site, two deltaic zones, and two localities in the middle Dnipro basin. The study provides comprehensive new data on parasites of the black-striped pipefish in Ukraine, with supporting data on its newly acquired freshwater range. A total of 21 parasite species (taxa) were revealed. Several parasite species were recorded for the first time on this host, i.e., Trichodinella epizootica (Raabe, 1950); Trypanosoma sp.; Bothriocephalus scorpii (Müller, 1776); Progrillotia dasyatidis Beveridge, Neifar et Euzet, 2004; Ophiotaenia europaea Odening, 1963; Cryptocotyle jejuna (Nicoll, 1907); Metorchis xanthosomus (Creplin, 1846); Tylodelphys clavata (von Nordmann, 1832); Holostephanus luehei Szidat, 1936; Contracaecum rudolphii Hartwich, 1964; Mothocya epimerica Costa in Hope, 1851; and Unionidae gen. sp. Formation of the species’ parasite component community depends entirely on environmental factors, with local parasite community features forming due to 1) presence of “marine” unicellular parasite species (ciliates) in marine localities (10‰–17‰ salinity) only, the community forming as a refraction of relative stenohalinity (Trichodina rectuncinata Raabe, 1958), findings of “marine” ciliate species in freshwater locations representing examples of successful osmoconformation (Trichodina partidisci Lom, 1962); or 2) presence of multicellular parasites in localities with abiotic/biotic conditions that allow completion of complex life cycles, such as those of trematodes (freshwater/marine mollusks as obligate first hosts) or cestodes (freshwater/marine invertebrates as intermediate hosts or marine/freshwater vertebrates as definitive hosts).

HTML

XML

PDF

]]>
Research Article Mon, 12 Jun 2023 14:28:47 +0300
New record of Chromis weberi (Actinopterygii: Ovalentaria: Pomacentridae) from Jeju Island, southern Korea https://aiep.pensoft.net/article/103531/ Acta Ichthyologica et Piscatoria 53: 89-94

DOI: 10.3897/aiep.53.103531

Authors: Se Hun Myoung, Jung-Goo Myoung, Min-Su Woo, Maeng Jin Kim, Min Gu Kang, Joo Myun Park

Abstract: Discovering tropical marine species outside of their distribution limits is important for evaluating the impact of climate change on marine ecosystems. One specimen (31.6 mm standard length) of a tropical fish, Chromis weberi Fowler et Bean, 1928, representing the family Pomacentridae, was first recorded from Jeju Island, Korea, on 8 December 2021. It was characterized by black posterior margins of the preopercle and opercle and black upper and lower lobes of the caudal fin. A specimen of this species collected from Munseom was distinguished from Chromis xanthura (Bleeker, 1854) based on distinct differences in the tips of the upper and lower caudal fin lobes, which are not black in C. xanthura. In addition, C. weberi was easily distinguished from the other four species in the genus Chromis, by the mitochondrial DNA cytochrome c oxidase subunit I gene sequence (345 bp), with genetic distances ranging from 0.130 to 0.252. This study documents the first record of C. weberi in temperate Korean waters, implying a poleward range expansion for this species. The Korean name ‘geom-eun-jeom-ggo-ri-ja-ri-dom’ has been proposed for C. weberi.

HTML

XML

PDF

]]>
Short Communication Tue, 6 Jun 2023 17:45:20 +0300
Microfibers in the gut of invasive armored catfish (Pterygoplichthys spp.) (Actinopterygii: Siluriformes: Loricariidae) in an urban lake in the floodplain of the Grijalva River basin, Mexico https://aiep.pensoft.net/article/102643/ Acta Ichthyologica et Piscatoria 53: 81-88

DOI: 10.3897/aiep.53.102643

Authors: Gabriela Angulo-Olmos, Nicolás Álvarez-Pliego, Alberto J. Sánchez, Rosa Florido, Miguel Ángel Salcedo, Arturo Garrido-Mora, Allan K. Cruz-Rámirez

Abstract: The intake of microplastics by freshwater fishes has been scarcely studied, and it is not yet clear whether the amount of particles these vertebrates ingest is associated with their feeding strategies. Hence, this study is focused on the suckermouth armored catfish (Pterygoplichthys spp.) under the hypothesis that, due to its detritivorous habits and demersal distribution, it may show evidence of the presence of microplastics in the sediments of a lake located in the Metropolitan Area of Villahermosa. A total of 21 organisms contained plastic microfibers throughout their digestive systems. These were treated with three solutions (hydrogen peroxide, potassium hydroxide, and sodium hypochlorite) to separate the microplastics. A total of 147 plastic particles of two categories were collected: microfibers (92%) and fragments (8%). Considering these results, as well as evidence in the literature, these species may constitute a global indicator of the incorporation into the trophic chain of microfibers deposited in the sediments of freshwater ecosystems.

HTML

XML

PDF

]]>
Research Article Fri, 26 May 2023 14:45:31 +0300
Estimation of selectivity parameters for target and bycatch fishes of the trammel net fisheries in the northern Aegean Sea (eastern Mediterranean Sea) https://aiep.pensoft.net/article/103358/ Acta Ichthyologica et Piscatoria 53: 65-80

DOI: 10.3897/aiep.53.103358

Authors: Angeliki Adamidou, Konstantinos Touloumis, Manos Koutrakis, Athanassios C. Tsikliras

Abstract: The size selectivity of trammel nets was investigated in the northern Aegean Sea using 10 different inner-panel mesh sizes ranging from 16 to 70 mm nominal mesh size (bar length). Selectivity estimates were made for the eight most abundant target and bycatch fish species, namely black scorpionfish, Scorpaena porcus Linnaeus, 1758; annular seabream, Diplodus annularis (Linnaeus, 1758); red mullet, Mullus barbatus Linnaeus, 1758; surmullet, Mullus surmuletus Linnaeus, 1758; round sardinella, Sardinella aurita Valenciennes, 1847; European hake, Merluccius merluccius (Linnaeus, 1758); greater weever, Trachinus draco Linnaeus, 1758; and blotched picarel, Spicara flexuosum Rafinesque, 1810, which accounted for 51.5% by number and 42.7% by weight of the fish caught with trammel nets in the sea trials. The SELECT method was used to estimate the selectivity parameters. Five different selectivity functions (i.e., normal scale, normal location, gamma, log-normal, and bi-normal) were applied with the bi-normal function providing the best fit as it had the lowest deviance value for all species and the lowest values for the dispersion parameter (D/df). The mesh size of 16 mm in most of the cases retained specimens below the size at first maturity (Lm). The mesh size of 19 mm seems more appropriate for red mullet, surmullet, and blotched picarel, the mesh size of 22 mm for annular seabream and round sardinella, while for European hake and black scorpionfish, the mesh size larger than 26 mm would be more appropriate.

HTML

XML

PDF

]]>
Research Article Tue, 23 May 2023 15:37:53 +0300
Length–weight relations of 39 continental-shelf and deep-water fishes (Actinopterygii) from northwestern Gulf of México https://aiep.pensoft.net/article/101788/ Acta Ichthyologica et Piscatoria 53: 59-64

DOI: 10.3897/aiep.53.101788

Authors: Ariel A. Chi-Espínola, M. Eugenia Vega-Cendejas, J. Mirella Hernández De Santillana

Abstract: Fishes from the northwestern Gulf of Mexico were surveyed during four oceanographic campaigns (February and October 2016, June and September 2017) using a shrimp trawl net and benthic sled net in 20 locations at depths that ranged from 43 to 3608 m. Length–weight relations (LWR) were estimated for 39 fish species (in alphabetical order): Bembrops gobioides (Goode, 1880); Centropristis philadelphica (Linnaeus, 1758); Chauliodus sloani Bloch et Schneider, 1801; Chlorophthalmus agassizi Bonaparte, 1840; Chloroscombrus chrysurus (Linnaeus, 1766); Citharichthys spilopterus Günther, 1862; Coelorinchus caelorhincus (Risso, 1810); Cyclopsetta chittendeni Bean, 1895; Cyclothone alba Brauer, 1906; Cyclothone braueri Jespersen et Tåning, 1926; Cyclothone pseudopallida Mukhacheva, 1964; Dibranchus atlanticus Peters, 1876; Epigonus pandionis (Goode et Bean, 1881); Fowlerichthys radiosus (Garman, 1896); Laemonema goodebeanorum Meléndez et Markle, 1997; Lagocephalus laevigatus (Linnaeus, 1766); Lepophidium brevibarbe (Cuvier, 1829); Lutjanus campechanus (Poey, 1860); Malacocephalus occidentalis Goode et Bean, 1885; Merluccius albidus (Mitchill, 1818); Micropogonias furnieri (Desmarest, 1823); Monolene sessilicauda Goode, 1880; Ogcocephalus declivirostris Bradbury, 1980; Peristedion greyae Miller, 1967; Porichthys plectrodon Jordan et Gilbert, 1882; Prionotus longispinosus Teague, 1951; Prionotus paralatus Ginsburg, 1950; Pristipomoides aquilonaris (Goode et Bean, 1896); Rhynchoconger flavus (Goode et Bean, 1896); Sardinella aurita Valenciennes, 1847; Saurida brasiliensis Norman, 1935; Sternoptyx diaphana Hermann, 1781; Symphurus diomedeanus (Goode et Bean, 1885); Synagrops bellus (Goode et Bean, 1896); Trachurus lathami Nichols, 1920; Trichiurus lepturus Linnaeus, 1758; Trichopsetta ventralis (Goode et Bean, 1885); Urophycis cirrata (Goode et Bean, 1896); Zalieutes mcgintyi (Fowler, 1952). The fish species studied represented 28 families (in alphabetical order): Antennariidae, Batrachoididae, Bembropidae, Bothidae, Carangidae, Chlorophthalmidae, Congridae, Cyclopsettidae, Cynoglossidae, Dorosomatidae, Epigonidae, Gonostomatidae, Lutjanidae, Macrouridae, Merlucciidae, Moridae, Ogcocephalidae, Ophidiidae, Phycidae, Sciaenidae, Serranidae, Sternoptychidae, Stomiidae, Synagropidae, Synodontidae, Tetraodontidae Trichiuridae, Triglidae. A new maximum standard length (SL) was recorded for Cyclothone alba, C. braueri, C. pseudopallida, and Lepophidium brevibarbe. A positive allometric growth was reported in nine species, negative allometric growth in 16 species, and isometric growth in 14 species.

HTML

XML

PDF

]]>
Short Communication Tue, 23 May 2023 15:37:23 +0300
Records of malformed sea catfishes (Ariopsis seemanni and Ariopsis guatemalensis) (Actinopterygii: Siluriformes: Ariidae) off San Blas (Mexican Pacific) https://aiep.pensoft.net/article/101350/ Acta Ichthyologica et Piscatoria 53: 45-49

DOI: 10.3897/aiep.53.101350

Authors: Felipe Guzmán-Morales, Angélica Yomira Ramos-Ávila, Mariana Díaz-Santana-Iturrios, Esperanza Granados-Amores, Jasmin Granados-Amores

Abstract: Fish malformations can be an important hint for assessing the well-being of their populations and the quality of their habitats. Malformations have been observed in species of the order Siluriformes, including the family Ariidae. In this study, we report malformations in the blue sea catfish, Ariopsis guatemalensis (Günther, 1864), and the tete sea catfish, Ariopsis seemanni (Günther, 1864), collected in San Blas, Mexico. The malformations include missing eye, cleft lip, and malformed barbels. Such malformations could be blamed on substantial levels of pesticides in the environment, genetic factors, and/or a pathogenic effect of some parasites specific to the studied fish species.

HTML

XML

PDF

]]>
Short Communication Thu, 20 Apr 2023 11:13:48 +0300
Reproductive biology of largescaled mullet, Parachelon grandisquamis (Actinopterygii: Mugiliformes: Mugilidae), in the Marine Protected Area of Niamone–Kalounayes (Casamance estuary, Senegal) https://aiep.pensoft.net/article/100933/ Acta Ichthyologica et Piscatoria 53: 37-43

DOI: 10.3897/aiep.53.100933

Authors: Patrick Diedhiou, Alassane Sarr, Ousseynou Samba, Modou Sene, Alexandre Langlais Bourassa, Waly Ndiaye

Abstract: In Senegal, studies on the family Mugilidae are rare and little data is available on their reproductive biology. This study, carried out in the MPA of Niamone–Kalounayes (Casamance River estuary, Senegal) aims to enhance our knowledge of the reproductive biology of the largescale mullet, Parachelon grandisquamis (Valenciennes, 1836), a species highly prized by the local population as a food source. To better understand its reproductive biology, a series of monthly samplings over twelve (12) months from July 2021 to June 2022 was carried out. Experimental fisheries were carried out at six (6) stations located in secondary channels lined with mangroves, using a seine net (250 m long and 25 mm mesh side). A total of 361 individuals were sampled, including 321 female specimens and 40 male specimens. The calculated sex ratio was in favor of females (1:8), with a significant difference between the calculated sex ratio and the theoretical 1:1 sex ratio (χ2 = 218.73; P-value < 0.05). In the MPA of Niamone–Kalounayes, the breeding period of P. grandisquamis extends from March to July, from the end of the dry season up to the beginning of the wet season. The sizes at first sexual maturity were 17 cm in males and 18 cm in females, showing that in the MPA of Niamone–Kalounayes, males and females of P. grandisquamis reach sexual maturity at very close sizes (χ2 = 0.02; P > 0.05). As this species is subject to the intense fishery by many actors in the area, these findings may be proven useful in the process of developing a management plan for this particular species.

HTML

XML

PDF

]]>
Research Article Thu, 20 Apr 2023 11:13:18 +0300
The dominance of non-indigenous species in the catch composition of small-scale fisheries: A case study from the Kaş–Kekova Special Environmental Protection Area, Türkiye, Eastern Mediterranean https://aiep.pensoft.net/article/96788/ Acta Ichthyologica et Piscatoria 53: 27-35

DOI: 10.3897/aiep.53.96788

Authors: Fikret Öndes, Vahdet Ünal

Abstract: This study aimed to determine the catch composition and compare the catch per unit effort (CPUE) of indigenous and non-indigenous species in longline and trammel net fisheries in the Mediterranean coasts of Türkiye. The data were collected weekly from May 2020 to September 2021 by commercial fishing vessels (n = 62 days for trammel nets, n = 75 days for longlines). The results of the study indicated that more than 90% of the catch composition consisted of non-indigenous species in trammel net fishery and Pterois miles (Bennett, 1828), Siganus rivulatus Forsskål et Niebuhr, 1775, Siganus luridus (Rüppell, 1829), and Scarus ghobban Forsskål, 1775 were the most commonly caught species. Although indigenous species were more common in longlines compared with trammel nets, non-indigenous species Lagocephalus sceleratus (Gmelin, 1789) and Lagocephalus suezensis Clark et Gohar, 1953 were represented by relatively high catch ratios. The results also revealed that the CPUE of non-indigenous species exhibited seasonal differences. Although some non-indigenous species caught within this study have a market value, some other highly invasive species do not. Therefore, it is critically important to develop effective management tools to control bio-invasion. This study provides the first comprehensive research by utilizing basic data with relatively long-term surveys in the small-scale fishery on the Mediterranean coasts of Türkiye. The outcomes of this study can provide guidance to decision-makers.

HTML

XML

PDF

]]>
Research Article Wed, 8 Mar 2023 21:23:30 +0200
Current status and length–weight relation of the European mudminnow, Umbra krameri (Actinopterygii: Esociformes: Umbridae), from Jieț River, Dolj County, southwestern Romania https://aiep.pensoft.net/article/99042/ Acta Ichthyologica et Piscatoria 53: 19-26

DOI: 10.3897/aiep.53.99042

Authors: Călin Lațiu, Mihnea Florian Moraru, Paul Uiuiu, Radu Constantinescu, Alexandru-Sabin Nicula, Tudor Papuc, Vioara Mireșan, Daniel Cocan

Abstract: The habitat of the European mudminnow, Umbra krameri Walbaum, 1792, is continuously decreasing due to human intervention. The species has a “vulnerable” status according to the IUCN Red List. Thus, new information about the species is needed for conservation efforts. Minnow traps were used for capturing Umbra krameri and other small fishes in the Jieț River, Dolj County, southwestern Romania. Captured specimens of U. krameri were measured and weighed. Length–weight relations and relative condition factor were determined for the captured U. krameri specimens. A total of 94 fishes were captured using the minnow traps. They represented 7 species: European bitterling, Rhodeus amarus (Bloch, 1782), roach, Rutilus rutilus (Linnaeus, 1758), rudd, Scardinius erythrophthalmus (Linnaeus, 1758), Danubian spined loach, Cobitis elongatoides Băcescu et Mayer, 1969, weatherfish, Misgurnus fossilis (Linnaeus, 1758), tubenose goby, Proterorhinus marmoratus (Pallas, 1814), and U. krameri. The specimens of Umbra krameri represented 44% (41 specimens) of the total catch. The wet body weight (BW) of U. krameri ranged from 0.8 to 5.1 g, having a mean value of 2.102 g. The mean total length (TL) was 5.782 cm, ranging from 4.59 to 7.87 cm. According to the length–weight relation (LWR), the growth type of U. krameri was positive allometric based on the determined equation: BW = 0.0068TL3.277. The mean value determined for the relative condition factor (Kn) was 1.0056486. The growth condition of 46% of the specimens was poor (Kn < 1; n = 19), while the other 54% were in good condition (Kn ≥ 1; n = 22). The presently reported study provides information about the presence of U. krameri in the Jieț River (Dolj County, Romania), a location where the species has not been previously reported. The LWRs show an allometric positive growth. The relative condition factor shows that 46% of the specimens had poor growth, while the rest were in good condition. Minnow traps were an efficient tool for small fish capture.

HTML

XML

PDF

]]>
Research Article Tue, 28 Feb 2023 09:59:36 +0200
A treatise about reliability in dating events of evolutionary history of brown trout Salmo cf. trutta (Actinopterygii) at Western Balkans: Impassable barriers, isolation of populations and assistance of geological timeframe https://aiep.pensoft.net/article/97702/ Acta Ichthyologica et Piscatoria 53: 1-18

DOI: 10.3897/aiep.53.97702

Authors: Ana Marić, Danica Srećković Batoćanin, Dubravka Škraba Jurlina, Miloš Brkušanin, Jelena Karanović, Tamara Kanjuh, Vera Nikolić, Danilo Mrdak, Predrag Simonović

Abstract: A pool of data already existing about D-loop, i.e., the Control Region (CR) haplotypes of the mitochondrial DNA (mtDNA) of brown trout, Salmo trutta Linnaeus, 1758, tentative Adriatic trout Salmo farioides Karaman, 1938, and tentative Macedonian trout, Salmo macedonicus (Karaman, 1924), and their reconstructed phylogeography makes a good starting point for resolving their evolutionary history. That includes the dating of particular events in it. The events have hitherto been dated using the method of a molecular clock. Various calibrations were applied for the mutation rate, owing to the incongruence between the time of divergence that various authors notified and general knowledge about events in geological history and the periods in which they occurred in the Mediterranean region. Since geological history events were mandatory for setting the scene for the evolutionary history of brown trout, the incongruence between them has questioned the molecular clock calibration’s validity. From results about both the phylogeography and phylogenetic relations between native haplotypes (both partial and whole CR sequences) and the population genetics that characterized particular populations, we calculated the time of divergence between haplotypes in the regions of the western part of the Balkans: Iron Gate broader area in eastern Serbia, continental Montenegro and south-eastern Serbia. The distinct status of adjacent populations was verified by frequencies of microsatellites’ alleles and the STRUCTURE analysis that examined the significance of differences between them. In particular, we examined the populations that were clearly separated either by physical barriers, such as a waterfall in eastern Serbia (e.g., the upper and lower River Rečka supplemented by nearby rivers Vratna and Zamna), or by underground drops in Montenegro (e.g., upper and lower River Zeta, and rivers Nožica and lower River Mrtvica as isolated counterparts). We used the so far most common substitution rate of 1% in a million years’ (MY) period. The divergence times we obtained were compared to the events known for the region from available geological history data. There was a fairly good congruence between the dating obtained by the molecular clock method and that by geological history where the advanced, i.e., modern haplotypes, were concerned. In contrast, the congruence was worse for dating of divergence when more ancient haplotypes were in question, being much better if the mutational rate would be decreased to lower rates. That supported results both from the Rate Correlation Test about the independence of evolutionary rates in different lineages of brown trout, and from the Molecular Clock Test, which revealed that the evolutionary rate throughout the phylogenetic tree is not equal. That implies a difference in the speed of evolution in them, which was likely slower and faster, in the ancient, pre-Pleistocene haplotypes and the advanced, Pleistocene ones, respectively. The setting of the variable, or non-linear (i.e., logarithmic) speed of evolving seems helpful, since the early cladogenesis with the dominance of mutations was most likely combined afterwards with the acting of other evolutionary mechanisms, especially of genetic drift in populations that passed through the bottleneck episodes of the abrupt decrease in population size during the unfavourable periods of their evolutionary history.

HTML

XML

PDF

]]>
Research Article Mon, 27 Feb 2023 18:13:50 +0200
New record of anthiadine fish, Plectranthias yamakawai (Actinopterygii: Perciformes: Serranidae), from the Philippines https://aiep.pensoft.net/article/96112/ Acta Ichthyologica et Piscatoria 52(4): 299-307

DOI: 10.3897/aiep.52.96112

Authors: Roxanne A. Cabebe-Barnuevo, Emmanuel S. Delloro Jr, Dianne Frances A. Penuela, Maria Celia D. Malay, Hiroyuki Motomura, Ricardo P. Babaran

Abstract: A single specimen of Plectranthias yamakawai Yoshino, 1972, 168.86 mm SL, obtained in a fish market in Zambales, Philippines, represents the first report in the country. Currently, the fish is only known to occur in Japan, Taiwan, and Samoa Islands. This anthiadine fish varies from other species of genus Plectranthias by having 30–33 lateral-line scales, a single red blotch below the lateral line, and numerous dark green blotches on the upper half of the body. The mitochondrial cytochrome oxidase subunit I (COI) is also described for the first time for this species in this article. The pairwise genetic distance computation reveals that P. yamakawai has a very low distance from the sequences of the other eight species of Plectranthias that have been submitted to GenBank. This is the sixth species of the genus Plectranthias to be reported from the western coast of Luzon, Philippines.

HTML

XML

PDF

]]>
Research Article Fri, 30 Dec 2022 17:50:05 +0200
Length–weight relations of 16 mesopelagic fishes (Actinopterygii: Myctophiformes and Stomiiformes) from the eastern Mediterranean Sea https://aiep.pensoft.net/article/97577/ Acta Ichthyologica et Piscatoria 52(4): 279-283

DOI: 10.3897/aiep.52.97577

Authors: Nicholas Badouvas, Stylianos Somarakis, Konstantinos Tsagarakis

Abstract: For many mesopelagic fishes, even basic knowledge regarding their biology is missing, greatly impeding their effective management. Here we present length–weight relations for 16 mesopelagic fishes sampled during research surveys in the Greek seas (eastern Mediterranean). The following species were studied: Benthosema glaciale (Reinhardt, 1837); Ceratoscopelus maderensis (Lowe, 1839); Diaphus holti Tåning, 1918; Diaphus metopoclampus (Cocco, 1829); Diaphus rafinesquii (Cocco, 1838); Hygophum benoiti (Cocco, 1838); Hygophum hygomii (Lütken, 1892); Lampanyctus crocodilus (Risso, 1810); Lobianchia dofleini (Zugmayer, 1911); Myctophum punctatum Rafinesque, 1810; Notoscopelus elongatus (Costa, 1844); Symbolophorus veranyi (Moreau, 1888) [Myctophidae]; Argyropelecus hemigymnus Cocco, 1829; Maurolicus muelleri (Gmelin, 1789) [Sternoptychidae]; Stomias boa (Risso, 1810); Chauliodus sloani Bloch et Schneider, 1801 [Stomiidae].With the exception of Diaphus holti and Symbolophorus veranyi, parameter b diverged significantly from isometry. Only two species (Benthosema glaciale and Chauliodus sloani) displayed negative allometry, while for the remaining 12 species a positive allometry was found, with the highest parameter b values estimated for Stomias boa and Diaphus rafinesquii. The median value of parameter b for all species was 3.236 and 50% of its values ranged from 3.173 to 3.323. Some variations of the parameter b were observed between our findings and other studies from the Atlantic and the western Mediterranean.

HTML

XML

PDF

]]>
Short Communication Mon, 19 Dec 2022 15:05:45 +0200
First record and new size record for the oceanic species Psenes sio (Actinopterygii: Scombriformes: Nomeidae) in the northern Gulf of California, Mexico https://aiep.pensoft.net/article/96130/ Acta Ichthyologica et Piscatoria 52(4): 273-278

DOI: 10.3897/aiep.52.96130

Authors: Uriel Rubio-Rodríguez, Carlos A. Godínez-Pérez, Airam N. Sarmiento-Lezcano

Abstract: The biological information for many species of the family Nomeidae is scarce, given the difficulty of capturing these species in the oceanic environment. A specimen of the twospine driftfish, Psenes sio Haedrich, 1970, was collected in the northern Gulf of California with a bottom trawl net at the depth of more than 250 m. This specimen represents the northernmost record of this species to date, and provides valuable information on this fish, such as maximum weight and height recorded, vertical distribution and latitudinal range, in addition to meristic counts and body morphometry.

HTML

XML

PDF

]]>
Short Communication Fri, 16 Dec 2022 07:32:08 +0200
Occurrence of contact organs and sexual dimorphism in fishes of the family Profundulidae (Actinopterygii: Cyprinodontiformes) https://aiep.pensoft.net/article/93669/ Acta Ichthyologica et Piscatoria 52(4): 261-265

DOI: 10.3897/aiep.52.93669

Authors: Ernesto Velázquez-Velázquez, Sara E. Domínguez-Cisneros, Manuel de J. Anzueto-Calvo, Maritza F. Maza-Cruz

Abstract: The family Profundulidae is one of the few families of freshwater fishes endemic to the Mesoamerican region, and one of the least speciose within the order Cyprinodontiformes, with only 13 valid species. Sexual dimorphism is poorly developed and sparsely studied in this family. Herein, we report the presence of spicule-like organs of contact in scales and fins (anal and dorsal) in fishes of the family Profundulidae and discuss the use of spicules as a means to facilitate the identification of male and female in this family. Data from museum specimens of the 13 species of profundulid fishes were analyzed. We studied the following species: Tlaloc labialis (Günther, 1866); Tlaloc candalarius (Hubbs, 1924); Tlaloc hildebrandi (Miller, 1950); Tlaloc portillorum (Matamoros et Schaefer, 2010); Profundulus punctatus (Günther, 1866); Profundulus guatemalensis (Günther, 1866); Profundulus oaxacae (Meek, 1902); Profundulus balsanus Ahl, 1935; Profundulus kreiseri Matamoros, Schaefer, Hernández et Chakrabarty, 2012; Profundulus parentiae Matamoros, Domínguez-Cisneros, Velázquez-Velázquez et McMahan, 2018; Profundulus mixtlanensis Ornelas-García, Martínez-Ramírez et Doadrio, 2015; Profundulus adani Dominguez-Cisneros, Velázquez-Velázquez, McMahan, et Matamoros, 2021; Profundulus chimalapensis Del Moral-Flores, López-Segovia et Hernández-Arellano, 2020. Scales were observed and photographed with a Hitachi VP-MEB SU1510 scanning electron microscope; the spicules in fins were observed from specimens cleared and double-stained. This study revealed the presence of 1–10 spicules on the surface of the scales in males and its absence in females of all species analyzed. Numerous, small and thin spicules were also observed and they were restricted to the middle rays of the anal and dorsal fins of the males. The observation of spicules in the anal fins for the sexual identification of profundulid fishes constitutes an advantage of operational simplicity, speed, and potential for its application in taxonomic and ecological studies.

HTML

XML

PDF

]]>
Short Communication Thu, 15 Dec 2022 11:45:34 +0200
A northward range extension of Thysanophrys papillaris (Actinopterygii: Scorpaeniformes: Platycephalidae) to Taiwan https://aiep.pensoft.net/article/91098/ Acta Ichthyologica et Piscatoria 52(4): 267-271

DOI: 10.3897/aiep.52.91098

Authors: Hisashi Imamura, Keita Koeda, Hsuan-Ching Ho

Abstract: The smallknob flathead, Thysanophrys papillaris Imamura et Knapp, 1999, is redescribed based on six specimens collected from southern Taiwan, which constitutes a northward range extension of the species [previously recorded from the Andaman, Timor, and Arafura seas (eastern Indian Ocean), and Nha Trang, Vietnam (western Pacific Ocean)]. Thysanophrys papillaris is distinguished from all congeneric species in having a combination of 11 second dorsal-fin rays, 12 anal-fin rays, 58–75 scale rows below the lateral line (slanting downward and forward), a longer snout (snout length / orbital diameter ratio 1.1–1.3), 1 or 2 small papillae on the eye, the upper iris lappet with short branches, a single preorbital spine and 3–5 suborbital spines. Previously suggested intraspecific variation in the number of eye papillae is confirmed.

HTML

XML

PDF

]]>
Research Article Thu, 15 Dec 2022 09:40:29 +0200
Age and growth of the Pacific hake, Merluccius productus (Actinopterygii: Gadiformes: Merlucciidae), in the Gulf of California: A multimodel approach https://aiep.pensoft.net/article/89824/ Acta Ichthyologica et Piscatoria 52(4): 251-260

DOI: 10.3897/aiep.52.89824

Authors: Eduardo Alvarez-Trasviña, Casimiro Quinonez-Velazquez, Dana I. Arizmendi-Rodríguez, Luis A. Salcido-Guevara, Guillermo Rodríguez-Domínguez, Rebeca Sanchez-Cardenas

Abstract: Over the past decade, the fishery of Pacific hake, Merluccius productus (Ayres, 1855), has increased in the Gulf of California, Mexico; therefore, any biological–fisheries information is highly relevant for the management of this fishery, and information on age and individual growth would be fundamental to evaluate populations. The objective of the presently study was to assess age, based on otolith structure, and estimate growth parameters through a multimodel approach. Specimens were collected during research cruises of BIP XI from 2014 to 2019. Pacific hake from the Gulf of California ranged in length from 12.5 to 105 cm TL, reaching a maximum age of 13 years, and females were four years older than males. The logistic model was the best model to describe age–size data for both sexes. Females reached 50% of the maximum length at five years old and males reached that length at four years old.

HTML

XML

PDF

]]>
Research Article Wed, 16 Nov 2022 17:59:53 +0200
First specimen-based Indonesian record of a rare scorpionfish, Scorpaenopsis obtusa (Actinopterygii: Perciformes: Scorpaenidae), from Alor Island https://aiep.pensoft.net/article/91145/ Acta Ichthyologica et Piscatoria 52(4): 245-249

DOI: 10.3897/aiep.52.91145

Authors: Rusdianto, Kunto Wibowo, Gino V. Limmon

Abstract: A single specimen of the shortsnout scorpionfish, Scorpaenopsis obtusa Randall et Eschmeyer, 2002 (Scorpaenidae), collected from the south coast of Ampera, Alor Barat Laut, Alor Island, Indonesia, at 5 m depth, represents the first voucher specimen-supported record of the species from Indonesian waters (previous records from Nusa Penida and northern Sulawesi having being based on underwater photographs). At 91.1 mm in standard length, the Alor specimen is the largest recorded individual of the species to date.

HTML

XML

PDF

]]>
Short Communication Wed, 16 Nov 2022 17:59:39 +0200
Length–weight relations of 14 endemic and indigenous freshwater fish species (Actinopterygii) from the Aral Sea basin, Uzbekistan https://aiep.pensoft.net/article/89279/ Acta Ichthyologica et Piscatoria 52(4): 239-243

DOI: 10.3897/aiep.52.89279

Authors: Bakhtiyor Sheraliev, Yorkinoy Kayumova, Sirojiddin Allayarov, Akbarjon Rozimov, Dildorakhon Komilova, Dilafruz Urmonova, Zuogang Peng

Abstract: Length–weight relations (LWR) were estimated for 14 endemic and indigenous fish species from the Aral Sea basin: Alburnoides holciki Coad et Bogutskaya, 2012; Capoetobrama kuschakewitschi (Kessler, 1872); Cottus spinulosus Kessler, 1872; Glyptosternon oschanini (Herzenstein, 1889); Gobio lepidolaemus Kessler, 1872; Gobio nigrescens (Keyserling, 1861); Iskandaria kuschakewitschi (Herzenstein, 1890); Iskandaria pardalis (Turdakov, 1941); Paracobitis longicauda (Kessler, 1872); Sabanejewia aralensis (Kessler, 1877); Schizothorax fedtschenkoi Kessler, 1872; Triplophysa daryoae Sheraliev, Kayumova et Peng, 2022; Triplophysa ferganaensis Sheraliev et Peng, 2021; and Triplophysa uranoscopus (Kessler, 1872). Measurements were taken for total length (0.1 cm precision) and total weight (0.1 g precision). The LWR parameters were determined using a linear logarithmic regression model of weight against length in which values for the slope of the regression, b, that are higher and lower than 3 indicate positive and negative allometric growth, respectively. The estimated values of parameter b ranged from 2.703 (Iskandaria kuschakewitschi) to 3.162 (Gobio nigrescens). The correlation coefficient (r2) values varied from 0.951 to 0.993, indicating a strong positive relation between length and weight. The maximum total lengths of four of the species (Glyptosternon oschanini, Iskandaria kuschakewitschi, Triplophysa daryoae, and Triplophysa uranoscopus) constitute new records, and the LWRs of twelve fish species have hitherto not been available in FishBase.

HTML

XML

PDF

]]>
Short Communication Wed, 2 Nov 2022 14:44:07 +0200
Development and characterization of microsatellite markers for Chaeturichthys stigmatias (Actinopterygii: Gobiiformes: Gobiidae) based on restriction site-associated DNA sequencing (RAD-seq) https://aiep.pensoft.net/article/84144/ Acta Ichthyologica et Piscatoria 52(3): 229-237

DOI: 10.3897/aiep.52.84144

Authors: Bingjie Chen, Yu Pan, Jian Zheng, Chenyu Song, Na Song

Abstract: Chaeturichthys stigmatias Richardson, 1844, a fish species of the family Gobiidae, is an offshore warm-temperate fish species and a dominant component of estuarine ecosystems. In this study, restriction site-associated DNA sequencing was adopted to analyze the traits of candidate microsatellite markers for C. stigmatias, and 30 polymorphic loci were developed. A total of 5631 microsatellites with primer fragments were detected, among which trinucleotide repeats (57.56% of the total simple sequence repeats) were the most abundant, followed by di- (23.30%), tetra- (11.79%), penta- (4.14%), and hexa- (3.21%) nucleotide repeats type. The numbers of alleles per locus ranged from 6 to 14 with the mean value of 10.4. The mean value of observed heterozygosity and the expected heterozygosity were 0.349 and 0.870, respectively. The microsatellite locus with the lowest polymorphic information content (PIC) was 0.749, which indicated that all sites were highly polymorphic (PIC > 0.50). This is the first microsatellite development and characterization of this species to be reported.

HTML

XML

PDF

]]>
Research Article Fri, 23 Sep 2022 11:02:06 +0300
New finding and description of the Galapagos batfish, Ogcocephalus darwini (Actinopterygii: Lophiiformes: Ogcocephalidae), in marine waters of Manabi, Ecuador https://aiep.pensoft.net/article/86543/ Acta Ichthyologica et Piscatoria 52(3): 223-227

DOI: 10.3897/aiep.52.86543

Authors: Jesús Briones-Mendoza, Klever Mendoza-Nieto, José Alió, Erick Muñoz-Cedeño, Marcela Garcìa-Zambrano, Joshue Flores-Bailon

Abstract: The finding of a specimen of the Galapagos batfish, Ogcocephalus darwini Hubbs, 1958 in marine waters of continental Ecuador was recorded. The specimen was captured by the artisanal fishing fleet that operates with bottom longlines in Las Piñas fishing cove, Manta Municipality, Manabí province, Ecuador. The specimen was transferred to the Biology Laboratory of the Faculty of Marine Sciences of the Universidad Laica Eloy Alfaro de Manabí, where morphometric data were taken for its identification. Until now, the species was considered endemic to the Galapagos, but it had been reported off northern Peru and now from the Ecuadorian continental shelf.

HTML

XML

PDF

]]>
Short Communication Fri, 23 Sep 2022 11:01:33 +0300
New and interesting records of marine fishes (Actinopterygii) from the Maltese Islands (central Mediterranean) https://aiep.pensoft.net/article/89340/ Acta Ichthyologica et Piscatoria 52(3): 215-221

DOI: 10.3897/aiep.52.89340

Authors: Joseph A. Borg, Julian Evans, Leyla Knittweis, Patrick J. Schembri

Abstract: The occurrence of three bony ray-finned fishes, Thorogobius ephippiatus (Lowe, 1839), Chlopsis bicolor Rafinesque, 1810, and Grammonus ater (Risso, 1810) is reported for the first time in the scientific literature from Maltese coastal waters. The leopard-spotted goby, T. ephippiatus, was mostly recorded within the 8–32 m depth range on soft sediment and rocky bottoms within caves, but one individual was recorded on a rocky bottom with a thin layer of silt at a depth of 117 m where no cave was present. The bicolour eel, C. bicolor, was recorded within the 318–518 m depth range on rocky bottoms covered with a thin layer of muddy-detritic sediment; and the cusk-eel G. ater was recorded at a depth of 10 m within a cave. Notes on these three species as well as on another bony fish, the Azores rockling, Gaidropsarus granti (Regan, 1903), including new information on their bathymetric range and habitat association, are presented.

HTML

XML

PDF

]]>
Short Communication Fri, 23 Sep 2022 10:59:18 +0300
First report of abnormal body coloration in Sebastes koreanus (Actinopterygii: Perciformes: Sebastinae) https://aiep.pensoft.net/article/89592/ Acta Ichthyologica et Piscatoria 52(3): 209-213

DOI: 10.3897/aiep.52.89592

Authors: Se Hun Myoung, Jung-Goo Myoung, Laith A. Jawad, Maeng Jin Kim, Joo Myun Park

Abstract: This study reports the first record of abnormal coloration in Sebastes koreanus Kim et Lee, 1994. The specimen (163.4 mm standard length and 197.3 mm total length) was collected from the Yellow Sea in South Korea in July 2021. The whole body of the specimens was red, and all fins also had red coloration while the slight dark red pattern under the eyes and dark spot on the opercula were similar to normal S. koreanus. It also showed a similar dotted pattern on the pectoral fins with a normal specimen.

HTML

XML

PDF

]]>
Short Communication Fri, 23 Sep 2022 10:56:33 +0300
Fish populations and biomass in headwater streams of the Lake Tumba Landscape, DR Congo, 2007–2011 https://aiep.pensoft.net/article/77638/ Acta Ichthyologica et Piscatoria 52(3): 195-208

DOI: 10.3897/aiep.52.77638

Authors: Adèle Mputu, Eva Willén, Anders Wilander, Stina Drakare, Kevin Bishop, Bila-Isia Inogwabini

Abstract: The fish biodiversity in the Congo River and its tributaries is extremely rich but the information on fish communities in the headwaters in terms of catch and biomass estimates is rare. Fishes in the running and stagnant waters in this region are of vital importance as a food resource for local residents. This study aimed to describe the fish community, catch, and biomass in the three headwater streams Bambou, Lebomo, and Bongo in the Lake Tumba Landscape (LTL) of the Democratic Republic of the Congo. Such information is of vital importance as a benchmark to understand the sustainability of the fish population for future generations of residents of the LTL. The field data were collected from 2007 through 2011, including dry and wet seasons. Here we present the results of this systematic, multi-annual study which was the first for fishes in streams of this region. In total, 50 species of 15 families were found in the nutrient-poor brown waters of these streams where high concentrations of humic acids cause a low pH. Among abundant species occurring in all three streams were the cyprinid Enteromius holotaenia (Boulenger, 1904), the mormyrid Marcusenius moorii (Günther, 1867), the alestids Clupeocharax schoutedeni Pellegrin, 1926 and Bryconaethiops boulengeri Pellegrin, 1900, and the clariid Clarias angolensis Steindachner, 1866. Bongo Stream was distinguished from the others by a rich abundance of Alestopetersius compressus (Poll et Gosse, 1963). The presence of several species at low pH (between 5.0 and 5.5) is new information that lowers the bottom of the pH interval for these species compared to earlier reports. The maximum total length (TL) of some other species was by 5–20 percentage points higher than those reported earlier. The median weight per unit effort (WPUE) in the streams varied between 30 and 115 g per hour during the dry seasons and between 18 and 86 g per hour during the wet seasons. The fish biomass in the streams varied between 0.05 and 0.7 g ⸱ m–2 with a median 0.14 g ⸱ m–2. This relatively low value compared to other tropical headwaters may be a result of the low pH and dark color of these headwaters. The results of the study serve as a reference point to which future monitoring of fish fauna can be compared for sustainable management of the LTL.

HTML

XML

PDF

]]>
Research Article Fri, 5 Aug 2022 15:31:15 +0300
First report of crested cusk-eel, Ophidion josephi (Actinopterygii: Ophidiiformes: Ophidiidae), in the southwestern Gulf of Mexico https://aiep.pensoft.net/article/86571/ Acta Ichthyologica et Piscatoria 52(3): 189-194

DOI: 10.3897/aiep.52.86571

Authors: Luis Fernando Del Moral-Flores, Janeth Rodríguez-González, María de Lourdes Jiménez-Badillo

Abstract: The crested cusk-eel, Ophidion josephi Girard, 1858, is a coastal marine species that is distributed in the northwestern Atlantic, from the northern Gulf of Mexico to Georgia, USA. Eighteen specimens (177–230 mm in standard length) were caught by beach purse seine at a depth of about 5 m, in Veracruz, in the southwestern Gulf of Mexico. This is the first documentation from Mexican marine waters and the southernmost confirmed records of this species, showing that its range extends further south than previously known and that it shares faunistic similarities with other species in the northwestern Atlantic.

HTML

XML

PDF

]]>
Short Communication Tue, 2 Aug 2022 16:58:12 +0300
Length–weight relation for seven Neotropical freshwater fish species (Actinopterygii) endemic to Central America https://aiep.pensoft.net/article/86467/ Acta Ichthyologica et Piscatoria 52(3): 183-187

DOI: 10.3897/aiep.52.86467

Authors: Justin C. Bagley, Maria Florencia Breitman, Jerald B. Johnson

Abstract: In the presently reported study, we estimated length–weight relation (LWRs) for seven species of freshwater fishes from Central America. Samples were collected using seines from 60 sites across Nicaragua, Costa Rica, and Panama during field expeditions conducted between 1997 and 2012. The fishes were preserved and transported to the lab, where their total weight (W) was measured (to nearest 0.0001 g) and standard lengths were taken (to nearest 0.01 mm). Data were collected from four livebearers (Poeciliidae), Alfaro cultratus (Regan, 1908), Phallichthys amates (Miller, 1907), Poecilia gillii (Kner, 1863), and Priapichthys annectens (Regan, 1907); the cichlids (Cichlidae), Parachromis dovii (Günther, 1864) and Parachromis managuensis (Günther, 1867); and a silverside (Atherinopsidae), Atherinella hubbsi (Bussing, 1979). Estimates of parameter b ranged from 2.936 (A. hubbsi) to 3.696 (P. gillii), while estimates of parameter a ranged from 1.7 × 10−6 (P. gillii) to 1.9 × 10−5 (P. managuensis). Parameter b estimates were greater than three, consistent with allometric growth, with the exception of P. annectens, P. managuensis, and A. hubbsi, for which t-tests failed to reject the null hypothesis of isometric growth. Our results provide the first LWR information for five (71%) of these species and may prove useful for data imputation or estimating the biomass of poeciliid, cichlid, and atheriniform fishes in Central American rivers in the future.

HTML

XML

PDF

]]>
Short Communication Tue, 2 Aug 2022 16:57:13 +0300
Length–weight and length–length relations of 16 freshwater fish species (Actinopterygii) caught in Jiaxing section of the Beijing–Hangzhou Grand Canal, China https://aiep.pensoft.net/article/86955/ Acta Ichthyologica et Piscatoria 52(3): 179-182

DOI: 10.3897/aiep.52.e86955

Authors: Aiju Zhang, Jiezhou Zhu, Qinping Lian, Pengcheng Sheng, Aihuan Guo, Wei Luo, Zhiming Zhou, Julin Yuan

Abstract: The length–weight (LWRs) and length–length (LLRs) relations were estimated for 16 fish species obtained from Jiaxing section of the Beijing–Hangzhou Grand Canal, China. One species represented Engraulidae: Coilia nasus Temminck et Schlegel, 1846; 11 species Cyprinidae: Hypophthalmichthys molitrix (Valenciennes, 1844); Hypophthalmichthys nobilis (Richardson, 1845); Chanodichthys erythropterus (Basilewsky, 1855); Chanodichthys mongolicus (Basilewsky, 1855); Culter alburnus Basilewsky, 1855; Chanodichthys dabryi (Bleeker, 1871); Pseudobrama simoni (Bleeker, 1864); Hemiculter leucisculus (Basilewsky, 1855); Megalobrama terminalis (Richardson, 1846); Carassius auratus (Linnaeus, 1758); Cyprinus carpio Linnaeus, 1758; one species Bagridae: Tachysurus fulvidraco (Richardson, 1846); two species Odontobutidae: Odontobutis potamophilus (Günther, 1861); Micropercops swinhonis (Günther, 1873); and one species Osphronemidae: Macropodus ocellatus Cantor, 1842. Fishes were collected using multipanel nylon gillnets with mesh sizes of 1–8 cm from November 2020 through August 2021. All fishes were measured for length (total length, TL; standard length, SL) to the nearest 0.1 cm and weight (W) to the nearest 0.1 g. The coefficients of determination R2 of LWRs and LLRs were all over 0.950, and the 16 values of LWR parameter b were estimated from 2.505 to 3.364. Our study provides new information on LWRs for 2 species and LLRs for 7 species, as well as a new maximum total length recorded for 3 species for FishBase. This study would allow for the convenience of the conversion of TL–W and SL–TL in fish stock assessment and is expected to provide a useful baseline for further studies of population parameters to improve management decisions.

HTML

XML

PDF

]]>
Short Communication Tue, 26 Jul 2022 12:09:47 +0300
New report and range extension of smallmouth flounder, Etropus microstomus (Actinopterygii: Carangiformes: Cyclopsettidae), in the Gulf of Mexico https://aiep.pensoft.net/article/86368/ Acta Ichthyologica et Piscatoria 52(3): 173-178

DOI: 10.3897/aiep.52.e86368

Authors: M. Eugenia Vega-Cendejas, J. Mirella Hernández de Santillana, Ariel A. Chi-Espínola

Abstract: The smallmouth flounder, Etropus microstomus (Gill, 1864), is a species of benthic habits, associated with soft sandy bottoms, and distributed from Canada to the New Orleans coasts, and with specific reports in Corpus Christi, TX, USA. No records have been available from the Mexican coast, however. In the presently reported study, the first finding of this species, in three proximate localities, is described from the Mexican coast. This record constitutes a considerable expansion range in the Gulf of Mexico. Ten specimens were identified through traditional taxonomic characters, together with a CO1 genetic sequence. The presence of this species in the Mexican coastal zone may be due to the dissemination of ichthyoplankton in the ballast water of commercial ships or to the ocean currents along the coasts of the Gulf of Mexico.

HTML

XML

PDF

]]>
Short Communication Tue, 26 Jul 2022 12:09:35 +0300
Records of the eel-goby, Taenioides snyderi (Actinopterygii: Gobiiformes: Gobiidae), from Taiwan https://aiep.pensoft.net/article/85646/ Acta Ichthyologica et Piscatoria 52(2): 167-172

DOI: 10.3897/aiep.52.85646

Authors: Reo Koreeda, Hsuan-Cing Ho, Hiroyuki Motomura

Abstract: Four gobiid specimens collected from the western coast of Taiwan were identified as Taenioides snyderi Jordan et Hubbs, 1925, being characterized by 51–55 (total) dorsal-fin rays, 44–46 (total) anal-fin rays, 17–19 pectoral-fin rays, 10 + 21 = 31 vertebrae, 3 paired barbels on the chin surface, the pelvic-fin base fused by membrane to the abdomen, and the pattern of the dermal folds with sensory papillae on the head and body. Taenioides snyderi has been recorded to date only from Japanese waters, although the likelihood of a wider distribution has been suggested by molecular analysis. This study represents the first specimen-based records of the species outside Japan, with data adding to our knowledge of a poorly known fish group.

HTML

XML

PDF

]]>
Research Article Fri, 8 Jul 2022 19:01:26 +0300
First record and otolith morphometric description of an adult lightfish, Ichthyococcus ovatus (Actinopterygii: Stomiiformes: Phosichthyidae), caught in the Strait of Sicily (central Mediterranean Sea) https://aiep.pensoft.net/article/84928/ Acta Ichthyologica et Piscatoria 52(2): 159-166

DOI: 10.3897/aiep.52.84928

Authors: Giacomo Sardo, Michele Luca Geraci, Fabio Falsone, Salvatore Gancitano, Vita Gancitano, Danilo Scannella, Charles Odilichukwu R. Okpala, Antonino Titone, Sergio Vitale

Abstract: On July 2018, one specimen of Ichthyococcus ovatus (Cocco, 1838) was caught in the Strait of Sicily during the International Bottom Trawl Survey in the Mediterranean (MEDITS). The adult I. ovatus measured 49 mm in total length and weighed 1.44 g. In this context, the presently reported study constitutes the first and deepest record of an adult of I. ovatus as well as the morphometric description of its sagittal otoliths. In addition, we provide an age estimation as well as an update of the geographical distribution of this bathypelagic species around the Mediterranean Sea. Based on the growth increments of sagittal otoliths, the estimated age was five years. Specifically, the otolith from the presently reported specimen of I. ovatus tended to be elliptic in shape related to aspect ratio and high rectangularity while circularity showed high complexity of otolith contour complexity. The absence of economic value of rarely reported species may underestimate their abundance. Therefore, more studies and research surveys would be necessary to fill the information gap on the biology of these deep-water species.

HTML

XML

PDF

]]>
Short Communication Thu, 7 Jul 2022 10:34:36 +0300
Intraspecific morphological variation in shads, Dorosoma anale and D. petenense (Actinopterygii: Clupeiformes: Clupeidae), in the Mexican Grijalva and Usumacinta river basins https://aiep.pensoft.net/article/84694/ Acta Ichthyologica et Piscatoria 52(2): 149-158

DOI: 10.3897/aiep.52.84694

Authors: Alberto Macossay-Cortez, Rocío Rodiles-Hernández, Alfonso A. González-Díaz, C. Patricia Ornelas-García, Adrián F. González-Acosta

Abstract: Historical hydrological changes and the environmental characteristics of northern Middle America have promoted diversification and determined the distribution of fishes in the Grijalva and Usumacinta river basins of Mexico. In several taxa with wide distributions, cryptic diversity has been identified through molecular and morphological analyses. This study evaluated the intraspecific morphological variation of Dorosoma anale Meek, 1904 and Dorosoma petenense (Günther, 1867) along the Grijalva and Usumacinta river basins through geometric morphometric and linear biometric analyses. Little intraspecific differentiation was detected for either species. However, differences were identified between populations in the Grijalva basin and those from the upper Usumacinta River basins with respect to body height, head size, pelvic fin position, and anal fin size. The phenotypic expression of these attributes appears to be closely related to habitat type and geographic isolation. The morphological differences within D. petenense support the molecular hypothesis of two lineages existing in the Usumacinta River basin.

HTML

XML

PDF

]]>
Research Article Thu, 7 Jul 2022 10:34:22 +0300
First record of butterflyfish, Roa haraguchiae (Actinopterygii: Perciformes: Chaetodontidae), from northeast Taiwan https://aiep.pensoft.net/article/82342/ Acta Ichthyologica et Piscatoria 52(2): 141-148

DOI: 10.3897/aiep.52.82342

Authors: Shu-Ling Lee, Yung-Chieh Chiu, Hong-Ming Chen

Abstract: A recently-described butterflyfish, Roa haraguchiae Uejo, Senou et Motomura, 2020, is herewith for the first time reported from northeast Taiwan. In Taiwan, the genus Roa has been known represented by a single species, Roa modesta (Temminck et Schlegel, 1844). This study presents a comparison of R. haraguchiae with its congeners and includes diagnostic characters on the basis of morphology and genetic differences by life-barcoding. Our specimens have some differences that may be attributed to the individual variations, which are compared and discussed.

HTML

XML

PDF

]]>
Research Article Thu, 7 Jul 2022 10:34:12 +0300
First record of the speckled Maori wrasse, Oxycheilinus arenatus (Valenciennes, 1840) (Actinopterygii: Perciformes: Labridae), from Indian coastal waters https://aiep.pensoft.net/article/84796/ Acta Ichthyologica et Piscatoria 52(2): 135-139

DOI: 10.3897/aiep.52.84796

Authors: Arumugam Murugan, Gopalan Mahadevan, Ronald Fricke

Abstract: The labrid fish species Oxycheilinus arenatus (Valenciennes, 1840) is recorded for the first time from India’s southeast coast. A total of three specimens were collected as trawl bycatch at Tuticorin, Tamil Nadu, southeast coast of India, in December 2021. The standard length of the specimens ranged from 15.42 to 19.5 cm SL. The presently reported finding of this species from the southeastern coast of India expands and confirms the known distribution range of O. arenatus, which was previously not known from India.

HTML

XML

PDF

]]>
Short Communication Fri, 24 Jun 2022 11:53:58 +0300
Estimating somatic growth of fishes from maximum age or maturity https://aiep.pensoft.net/article/80093/ Acta Ichthyologica et Piscatoria 52(2): 125-133

DOI: 10.3897/aiep.52.80093

Authors: Rainer Froese

Abstract: Growth in body size is a key life-history trait that has coevolved and is interlinked with maturation, maximum age, mortality, generation time, and the intrinsic rate of population growth. Growth parameters are therefore required inputs in the majority of assessment models used in conservation or fisheries management. However, because of the difficulties involved in the proper aging of individuals, growth parameters are unknown for the vast majority of species. Here, two new data-limited methods are presented to estimate somatic growth from maximum length combined with either length or age at maturation or with maximum age. A comparison with existing growth parameters of fishes (Actinopterygii and Elasmobranchii) shows that the estimates of the new methods fall within the range of established methods. The new methods apply to species with indeterminate growth, such as fishes or invertebrates, and were used here to produce the first growth parameter estimates for 110 species of fishes.

HTML

XML

PDF

]]>
Research Article Mon, 16 May 2022 18:37:30 +0300
Comparison of technical measures in the Aegean Sea to support harmonization of fisheries management policies https://aiep.pensoft.net/article/80083/ Acta Ichthyologica et Piscatoria 52(2): 111-123

DOI: 10.3897/aiep.52.80083

Authors: Hakkı Dereli, Vahdet Ünal, Anastasia Miliou, Theodoros Tsimpidis, Ifigeneia Trompouki, Zafer Tosunoğlu, Konstantinos Alexopoulos, Aylin Ulman

Abstract: The Aegean Sea features an important archipelago in the Eastern Mediterranean, consisting of 60 inhabited islands, more than 1400 uninhabited islands, about 60–70 commercial marine taxa, along many vulnerable species. Fisheries are mainly coastal and are exploited by Greek and Turkish fishers. The multi-species and multi-gear fisheries operate within each country’s 6-nautical mile territorial sea and in the international waters of the Aegean Sea. As the fisheries resources are currently declining in this region, it is clear that current management initiatives are ineffective and would benefit from a new regime aiming to improve the state of the commercial marine resources. This study offers a comparative analysis of certain fishing gear technical measures applied by Greece and Turkey in the Aegean Sea. Identified differences can provide clear and helpful insights for decision-makers for the development of a new and productive management approach in Aegean waters. The fishery regulations were shown to be highly variable, sharing few similarities and stressing many more differences, thus rendering the current management of the shared fish stocks unsustainable. The resources of both states would greatly benefit from the harmonization of management measures focusing on an ecosystem approach to fisheries, and incorporating fishers as stakeholders.

HTML

XML

PDF

]]>
Research Article Tue, 10 May 2022 16:06:32 +0300
First record of the batfish, Halieutaea indica (Actinopterygii: Lophiiformes: Ogcocephalidae), from the Red Sea https://aiep.pensoft.net/article/79442/ Acta Ichthyologica et Piscatoria 52(2): 101-105

DOI: 10.3897/aiep.52.79442

Authors: Daniel Golani, Ronald Fricke, Brenda Appelbaum-Golani

Abstract: The Indian handfish or batfish, Halieutaea indica Annandale et Jenkins, 1910, is recorded for the first time from the Red Sea. This report constitutes also the first record of the family Ogcocephalidae from this region.

HTML

XML

PDF

]]>
Short Communication Tue, 12 Apr 2022 18:06:53 +0300
Length–weight relations of ten freshwater fish species (Actinopterygii) from Abashiri River basin, eastern Hokkaido, Japan https://aiep.pensoft.net/article/81301/ Acta Ichthyologica et Piscatoria 52(2): 95-99

DOI: 10.3897/aiep.52.81301

Authors: Atsuya Yamamoto, Kota Tabata, Tomohiro Fukushige, Takuya Inoue, Hiroaki Furutsu, Michihisa Hiroya, Minoru Kanaiwa

Abstract: Length–weight relations (LWRs) were estimated for ten freshwater fish species such as gin-buna, Carassius langsdorfii Temminck et Schlegel, 1846; lake minnow, Rhynchocypris percnura (Pallas, 1814); Siberian loach, Barbatula toni (Dybowski, 1869); Japanese smelt, Hypomesus nipponensis McAllister, 1963; masu salmon, Oncorhynchus masou (Brevoort, 1856); rainbow trout, Oncorhynchus mykiss (Walbaum, 1792); whitespotted char, Salvelinus leucomaenis (Pallas, 1814); ninespine stickleback, Pungitius pungitius (Linnaeus, 1758); hana-kajika, Cottus nozawae Synder, 1911; and a species of goby Rhinogobius sp. Specimens were collected once a month except in the snow season from the Abashiri River basin, eastern Hokkaido, between June 2007 and November 2011. Fishes were captured by an electrofishing device (Smith–Root Inc., Model 12-b). The estimated allometric coefficient b values ranged from 2.790 (ninespine stickleback) to 3.294 (hana-kajika), and r2 values ranged from 0.772 (lake minnow) to 0.994 (goby). All the LWRs were highly significant, with P < 0.001. Besides, the study provides the first estimates of LWRs for the Siberian loach, Japanese smelt, masu salmon, whitespotted char, hana-kajika, and the goby.

HTML

XML

PDF

]]>
Short Communication Tue, 12 Apr 2022 14:44:07 +0300
First record of the Philippine snubnose halfbeak, Melapedalion breve (Actinopterygii: Beloniformes: Hemiramphidae), from Bangka Belitung Islands, Indonesia https://aiep.pensoft.net/article/81822/ Acta Ichthyologica et Piscatoria 52(2): 107-110

DOI: 10.3897/aiep.52.81822

Authors: Kunto Wibowo, Gema Wahyudewantoro, Fahmi Fahmi

Abstract: A single specimen (117.1 mm standard length) of Melapedalion breve (Seale, 1910) collected off Lepar Island, Bangka Belitung Islands, Indonesia, represents the first record of M. breve from Indonesian waters and the southernmost record of the species. Melapedalion breve has previously been recorded from the Sulu Sea (southwestern Philippines) and eastern central South China Sea.

HTML

XML

PDF

]]>
Short Communication Tue, 12 Apr 2022 07:58:44 +0300
Diet seasonality and food overlap of Perca fluviatilis (Actinopterygii: Perciformes: Percidae) and Rutilus rutilus (Actinopterygii: Cypriniformes: Cyprinidae) juveniles: A case study on Bovan Reservoir, Serbia https://aiep.pensoft.net/article/78215/ Acta Ichthyologica et Piscatoria 52(1): 77-90

DOI: 10.3897/aiep.52.78215

Authors: Milena Radenković, Milica Stojković Piperac, Aleksandra Milošković, Nataša Kojadinović, Simona Đuretanović, Tijana Veličković, Marija Jakovljević, Marijana Nikolić, Vladica Simić

Abstract: European perch, Perca fluviatilis Linnaeus, 1758 and roach, Rutilus rutilus (Linnaeus, 1758) are the most common species present in mesotrophic and eutrophic lakes throughout Europe. Their biomass, especially in juvenile stages, contributes the most to the fish production of these ecosystems. In Bovan Reservoir, these two species constitute the bulk of the juvenile fish biomass. This study aimed to investigate the feeding composition of these two species in order to evaluate their niche overlap due to the availability of resources during different seasons. Traditional diet analysis indices and Kohonen artificial neural network (i.e., a self-organizing map, SOM) were used to investigate the diet of 158 individuals of both species and evaluate their food niche overlap. The indicator value (IndVal) was applied to identify indicator food categories based on which the contents of their alimentary tracts were grouped first into neurons and then into clusters on the SOM. Our results showed that juvenile fish used zooplankton and benthic prey in their diet. Roach often fed on nonanimal prey, while perch of age 0+ used fishes in the diet. Additionally, four clusters of neurons were isolated on the SOM output network. The distribution of perch and roach alimentary tracts in neurons indicated no high degree of competition between them. While diet analyses indices show which food category is generally important in specimensʼ diet, the SOM recognizes those specimens and arranges them together into the same or adjacent neurons based on dominant prey. Understanding fish feeding habits is critical for the development of conservation and management plans. Since Bovan is a eutrophic reservoir, our knowledge of fish feeding habits needs to be considered for stocking strategies in the future.

HTML

XML

PDF

]]>
Research Article Tue, 29 Mar 2022 22:13:57 +0300
Many immature individuals and largest size classes lacked females for three coral reef fishes (Actinopterygii) in Fiji market surveys: Implications for fishery management https://aiep.pensoft.net/article/80586/ Acta Ichthyologica et Piscatoria 52(1): 53-65

DOI: 10.3897/aiep.52.80586

Authors: Ken Longenecker, Erik C. Franklin, Renee Hill-Lewenilovo, Watisoni Lalavanua, Ross Langston, Sangeeta Mangubhai, Susanna Piovano

Abstract: Data-limited fisheries benefit from using life-history traits as biological indicators of targeted stocks. We used histology-based reproductive analyses to estimate size at maturity, per capita egg production, and the number and biomass of immature individuals in the catch for three common coral reef fishes in Fiji market surveys during 2010–2019. We studied Lutjanus gibbus (Forsskål, 1775), Parupeneus indicus (Shaw, 1803), and Chlorurus microrhinos (Bleeker, 1854), which represent three families: Lutjanidae, Mullidae, and Scaridae, respectively. Fork length comprising 50% mature individuals for females of L. gibbus was 22.7 cm, that of P. indicus was 25.9 cm, attaining 38.0 cm for C. microrhinos. Females were rare or absent in the largest size classes of all three species. Immature fish represented up to 50% by number and 41% by biomass of the catch in market surveys, with P. indicus having the greatest immature number (8%‒50%) and biomass (6%‒41%), followed by C. microrhinos (20%‒30% by count, 11%‒18% by biomass) and L. gibbus (9%‒28% by count, 5%‒14% by biomass). Individuals ≤ 30 cm for L. gibbus and P. indicus and ≤ 45 cm for C. microrhinos were responsible for ≥ 90% of egg production per spawning. Skewed size-specific sex ratios suggested that exploitation of the largest size classes had minimal effect on overall egg production. Decreased catches of immature fishes would increase the reproductive population sizes for these species.

HTML

XML

PDF

]]>
Research Article Tue, 29 Mar 2022 22:13:52 +0300
Ecological status of fish fauna from Razim Lake and the adjacent area, the Danube Delta Biosphere Reserve, Romania https://aiep.pensoft.net/article/79646/ Acta Ichthyologica et Piscatoria 52(1): 43-52

DOI: 10.3897/aiep.52.79646

Authors: Aurel Năstase, Ștefan Honț, Marian Iani, Marian Paraschiv, Irina Cernișencu, Ion Năvodaru

Abstract: The aim of this study was to determine the ecological status of fish fauna of Razim Lake under the conditions of the water salinity changing from brackish, almost 70 years ago, into freshwater nowadays. The natural processes of siltation and organic deposits, characteristic of Danube Delta lake complexes, intensified in the last decades and included also Razim Lake. The presently reported study of Razim Lake and the adjacent area was undertaken in 2020 with intention to cover fish fauna collected with three different sampling methods (electrofishing, gillnetting, and seining). For each sampling method, Catch per Unit Effort (CPUE), relative abundance, and biomass were determined, as well as selected ecological parameters to determine ecological status of richness species in the area. Published data included 55 fish species, mainly marine and euryhaline, but in 2020 only 43 species were reported. Also, the species composition shifted from marine ones to freshwater or euryhaline ones. Of those 43 species captured in 2020 from Razim Lake and neighboring areas, 39 were native and four were non-native, including a newcomer, the Chinese sleeper, Perccottus glenii Dybowski, 1877. Few species were migratory, reophilous, or reophilous-stagnophilous which rarely enter Razim Lake, but the majority were limnophilous or stagnophilous-reophilous species. Four species were dominant in terms of the abundance; Blicca bjoerkna (Linnaeus, 1758); Rutilus rutilus (Linnaeus, 1758); Alburnus alburnus (Linnaeus, 1758); and Carassius gibelio (Bloch, 1782). In terms of the biomass the dominants were: Cyprinus carpio Linnaeus, 1758; Carassius gibelio; Sander lucioperca (Linnaeus, 1758); Pelecus cultratus (Linnaeus, 1758); and Blicca bjoerkna. Some differences between sampling methods used were observed. Eudominant, euconstant, and main species were Blicca bjoerkna and the majority of fish species were accessories, with differences amongst sampling methods used. Fish diversity parameters indicate a stable ichthyocoenosis, more stable along the lake shoreline. Ecological indicators of fish fauna from Razim Lake in 2020 grade the water lake quality as a moderate ecological class according to the Water Framework Directive of the European Union.

HTML

XML

PDF

]]>
Research Article Tue, 29 Mar 2022 22:10:37 +0300
Triploid forms’ karyotypes of spined loaches from the genus Cobitis (Actinopterygii: Cypriniformes: Cobitidae) of the upper Dnieper and Western Dvina rivers: Analysis of the triploids’ origin https://aiep.pensoft.net/article/81191/ Acta Ichthyologica et Piscatoria 52(1): 67-75

DOI: 10.3897/aiep.52.81191

Authors: Victor Vasil`ev, Ekaterina Vasil`eva

Abstract: Unisexual forms of lower vertebrates (fish, amphibians, and reptiles) reproduced by parthenogenesis, gynogenesis, or hybridogenesis are represented by diploids, triploids, or tetraploids, whose origin is associated with interspecific hybridization. Among fish species, the highest variability of unisexual polyploids was found in the genus Cobitis. The structure of their genomes and putative parental species holds great interest for the investigation in association with questions about possible evolutionary success. In particular, it serves to elucidate the possible high colonization properties of a few polyploid forms, in contrast to the local history of rather numerous hybrid forms with a limited distribution. Therefore, the aim of this study was to describe the karyotype structure of two newly discovered triploid forms of the genus Cobitis, to analyze their origin and putative parental species. The karyotype structure of 182 spined loach individuals from the Western Dvina River and 91 individuals from the upper Dnieper River of the Smolensk District of Russia was studied. A total of 121 studied individuals from the Western Dvina comprised triploid females with a chromosome number 74 and karyotype consisting of 13 meta-, 39 submeta-, and 22 subtelo-acrocentric chromosomes. Among loaches collected in the upper Dnieper River, 42 triploid females were found with 74 chromosome number including 23 meta-, 26 submeta-, and 25 subtelo-acrocentric chromosomes. Other individuals from both localities were karyologically identified as Cobitis taenia Linnaeus, 1758 with 2n = 48. The triploid form of spined loaches of the Western Dvina River most likely arose as a result of the hybridization of Cobitis tanaitica Bǎcescu et Mayer, 1969 and C. taenia. The range of C. tanaitica, whose karyotype is characterized by an evolutionarily fixed Y-autosomal translocation, is limited to the rivers of the northern coast of the Black Sea. Therefore, hybridization probably happened in late Pleistocene in the Dnieper River system, where both parental species occur. The triploid form that arose here is unique for the Baltic Sea basin. Probably, it colonized the Western Dvina through the artificial Berezinskaya water system (Berezina Canal = Daugava–Dnieper Canal), but at the same time it was forced out of its area of origin by other triploid forms which are now widespread there. According to the karyotype structure, the triploid form, common for both the upper and lower reaches of the Dnieper, has a trihybrid origin, with probable hybridization of Cobitis elongatoides Bǎcescu et Mayer, 1969, C. tanaitica, and yet unidentified species Cobitis sp. Both studied triploid forms are parts of unisexual-bisexual complexes, in which their putative diploid maternal species (C. tanaitica and C. elongatoides) are absent, and the role of the host species involved in reproduction belongs to C. taenia.

HTML

XML

PDF

]]>
Research Article Tue, 29 Mar 2022 22:10:08 +0300
Length-to-weight and length-to-length relations of 15 freshwater fish species (Actinopterygii: Cypriniformes) from the Oujiang River, China https://aiep.pensoft.net/article/80322/ Acta Ichthyologica et Piscatoria 52(1): 91-93

DOI: 10.3897/aiep.52.80322

Authors: Aiju Zhang, Wei Luo, Jun Wang, Yabin Hao, Shanshi Xiao, Zhiming Zhou

Abstract: Length-to-weight and length-to-length relations were estimated for 15 freshwater fishes belonging to the order Cypriniformes from Yuxi power station to Kaitan reservoir dam trunk stream of the Oujiang River, Zhejiang Province, China. The following species were studied: Distoechodon tumirostris Peters, 1881, Xenocypris davidi Bleeker, 1871, Plagiognathops microlepis (Bleeker, 1871), Hemibarbus labeo (Pallas, 1776), Hemibarbus maculatus Bleeker, 1871, Chanodichthys erythropterus (Basilewsky, 1855), Culter alburnus Basilewsky, 1855, Chanodichthys dabryi (Bleeker, 1871), Opsariichthys bidens Günther, 1873, Zacco platypus (Temminck et Schlegel, 1846), Sinibrama macrops (Günther, 1868), Hemiculter leucisculus (Basilewsky, 1855), Pseudohemiculter hainanensis (Boulenger, 1900), Rhodeus sinensis Günther, 1868, and Squalidus argentatus (Sauvage et Dabry de Thiersant, 1874). The determination coefficients r2 of LWRs were all over 0.96, and the 15 values of parameter b were consistent with the predicted range of 2.5–3.5. The total length-to-standard length relations were also calculated with r2 ≥ 0.97. Our study provides new information on LWR for 1 species and LLRs for 8 species, as well as new maximum total length recorded for 4 species (i.e., Distoechodon tumirostris, Opsariichthys bidens, Pseudohemiculter hainanensis, and Rhodeus sinensis) in FishBase. This study is expected to provide a useful baseline for further studies of population parameters to improve management decisions on the Oujiang River.

HTML

XML

PDF

]]>
Short Communication Tue, 29 Mar 2022 22:06:40 +0300
Revalidation of the genus Ichthyocoris Bonaparte, 1840 (Actinopterygii: Blenniiformes: Blenniidae) https://aiep.pensoft.net/article/79458/ Acta Ichthyologica et Piscatoria 52(1): 35-41

DOI: 10.3897/aiep.52.79458

Authors: Emma Duquenne-Delobel, Ignacio Doadrio, Gaël P. J. Denys

Abstract: Combtooth blennies belonging to the genus Salaria were known to have marine and freshwater species. However, recent molecular studies highlighted this genus as paraphyletic, clearly distinguishing both marine and freshwater species. In this paper, we revalidate the genus Ichthyocoris, which corresponds to the freshwater species: Ichthyocoris atlantica (Doadrio, Perea et Yahyaoui, 2011), new combination, Ichthyocoris economidisi (Kottelat, 2004), new combination, and Ichthyocoris fluviatilis (Asso y del Rio, 1801), new combination. It is distinguishable by the presence of brownish bars on the flanks not contrasted with black dots conferring a marble coat, a dorsal fin slightly notched between spined and soft rays (except for I. atlantica), 16–18 dorsal-fin soft rays, 16–20 anal-fin soft rays, 34–38 vertebrae, 8–9 circumorbital pores, 8–11 preopercular pores, and 3 supratemporal pores. The genus Salaria corresponds to the marine species Salaria basilisca (Valenciennes, 1836) and Salaria pavo (Risso, 1810).

HTML

XML

PDF

]]>
Research Article Tue, 29 Mar 2022 13:25:24 +0300
Length–weight relations and condition factors of 34 Oxynoemacheilus species (Actinopterygii: Cypriniformes: Nemacheilidae) from Turkish inland waters https://aiep.pensoft.net/article/81211/ Acta Ichthyologica et Piscatoria 52(1): 29-34

DOI: 10.3897/aiep.52.81211

Authors: Erdoğan Çiçek, Burak Seçer, Soheil Eagderi, Sevil Sungur

Abstract: This study aimed to provide the length–weight relations and condition factors of 34 Oxynoemacheilus species from the inland waters of Turkey: Oxynoemacheilus anatolicus Erk’akan, Özeren et Nalbant, 2008; Oxynoemacheilus angorae (Steindachner, 1897); Oxynoemacheilus argyrogramma (Heckel, 1847); Oxynoemacheilus arsaniasus Freyhof, Kaya, Turan et Geiger, 2019; Oxynoemacheilus atili Erk’akan, 2012; Oxynoemacheilus banarescui (Delmastro, 1982); Oxynoemacheilus bergianus (Derjavin, 1934); Oxynoemacheilus cf. bureschi (Drensky, 1928); Oxynoemacheilus ceyhanensis (Erk’akan, Nalbant et Özeren, 2007); Oxynoemacheilus ciceki Sungur, Jalili et Eagderi, 2017; Oxynoemacheilus cilicicus Kaya, Turan, Bayçelebi, Kalayci et Freyhof, 2020; Oxynoemacheilus cyri (Berg, 1910); Oxynoemacheilus ercisianus (Erk’akan et Kuru, 1986); Oxynoemacheilus eregliensis (Bănărescu et Nalbant, 1978); Oxynoemacheilus euphraticus (Bănărescu et Nalbant, 1964); Oxynoemacheilus evreni (Erk’akan, Nalbant et Özeren, 2007); Oxynoemacheilus frenatus (Heckel, 1843); Oxynoemacheilus germencicus (Erk’akan, Nalbant et Özeren, 2007); Oxynoemacheilus hamwii (Krupp et Schneider, 1991); Oxynoemacheilus hazarensis Freyhof et Özuluğ, 2017; Oxynoemacheilus insignis (Heckel, 1843); Oxynoemacheilus kaynaki Erk’akan, Özeren et Nalbant, 2008; Oxynoemacheilus mediterraneus (Erk’akan, Nalbant et Özeren, 2007); Oxynoemacheilus namiri (Krupp et Schneider, 1991); Oxynoemacheilus nasreddini Yoğurtçuoğlu, Kaya et Freyhof, 2021; Oxynoemacheilus paucilepis (Erk’akan, Nalbant et Özeren, 2007); Oxynoemacheilus samanticus (Bănărescu et Nalbant, 1978); Oxynoemacheilus seyhanensis (Bănărescu, 1968); Oxynoemacheilus seyhanicola (Erk’akan, Nalbant et Özeren, 2007); Oxynoemacheilus simavicus (Balik et Bănărescu, 1978); Oxynoemacheilus theophilii Stoumboudi, Kottelat et Barbieri, 2006; Oxynoemacheilus tigris (Heckel, 1843); Oxynoemacheilus veyselorum Çiçek, Eagderi et Sungur, 2018. Based on the results, the growth coefficient values (b) ranged from 2.770 (O. argyrogramma) to 3.285 (O. theophilii) with an R2 estimate greater than 0.91. Fulton’s condition factor (KF) of the studied fishes ranged from 0.598 (O. insignis) to 1.07 (O. nasreddini) . Relative conditions (KR) were found to have a narrow distribution range (0.856–1.014 with a mean of 1.005). The form factors of these species were calculated between 0.006 and 0.14, with a mean and median value of 0.01. This study represents the first reports of LWRs parameters for 22 species, new maximum total length data were bigger than given in FishBase for 21 species, and first species listing for maximum total length for seven species. The findings of this study provide useful information for further fisheries management and fish population dynamic studies.

HTML

XML

PDF

]]>
Research Article Mon, 14 Mar 2022 10:22:03 +0200
First records of the two gobies, Cryptocentrus shigensis and Priolepis profunda (Actinopterygii: Gobiiformes: Gobiidae), from the Andaman Sea https://aiep.pensoft.net/article/71241/ Acta Ichthyologica et Piscatoria 52(1): 21-27

DOI: 10.3897/aiep.52.71241

Authors: Kyoji Fujiwara, Peter N. Psomadakis, Thet Yu Yu Swe, Hiroyuki Motomura

Abstract: Single specimens of Cryptocentrus shigensis Kuroda, 1956 (41.1 mm standard length: SL) and Priolepis profunda (Weber, 1909) (24.4 mm SL) represent the first specimen-supported records of those species from the Andaman Sea. Notably, the specimen of C. shigensis represents the first Indian Ocean record, the species having been previously recorded only from southern Japan and Palau. Full descriptions of the specimens are provided.

HTML

XML

PDF

]]>
Research Article Mon, 14 Mar 2022 10:21:19 +0200
New records of recently described Zebrus pallaoroi (Actinopterygii: Gobiiformes: Gobiidae) with notes on its morphology, ecology, and molecular identification https://aiep.pensoft.net/article/79723/ Acta Ichthyologica et Piscatoria 52(1): 13-19

DOI: 10.3897/aiep.52.79723

Authors: Marcelo Kovačić, Branko Dragičević, Mišo Pavičić, Iva Žužul, Tanja Šegvić-Bubić

Abstract: The family Gobiidae represents the species-richest family of fishes in the Mediterranean Sea. However, many Mediterranean gobiid species are poorly known with just one or few species records in total. Among those species, the recently described Zebrus pallaoroi Kovačić, Šanda et Vukić, 2021 has been known only from the localities in the species description: the southern Adriatic, northern Ionian, and northern and western Aegean seas. The additional specimens of this species were collected in central and northern Adriatic Sea. The identification was confirmed by morphological and genetic methods. The morphological and preserved coloration characters were compared with the data from the limited type material and the alternative preserved coloration diagnostic character was suggested. The first data on alive and freshly dead coloration are reported. The phylogenetic analysis was performed on sequenced COI, cytochrome b, and rhodopsin genes. The analyzed molecular markers placed Z. pallaoroi in a distinct clade within Zebrus–Millerigobius group. The preference of this species for the very shallow habitat is confirmed and discussed.

HTML

XML

PDF

]]>
Research Article Tue, 8 Mar 2022 16:20:40 +0200
Length–weight relations of 12 freshwater fish species (Actinopterygii: Cypriniformes) including two endangered species, Cobitis choii (Cobitidae) and Gobiobotia naktongensis (Cyprinidae), in the Geum River, South Korea https://aiep.pensoft.net/article/79067/ Acta Ichthyologica et Piscatoria 52(1): 9-12

DOI: 10.3897/aiep.52.79067

Authors: Seung-Ho Baek, Sang-Hyeon Park, Jeong-Hui Kim, Jo-Hee Yoon, Jeong-Suk Moon, Dong-Hwan Kim, Ju-Duk Yoon

Abstract: Length–weight relations (LWRs) of 12 freshwater fish species from the Geum River, South Korea were estimated. The following species representing the family Cobitidae, Xenocyprididae, Acheilognathidae, and Gobionidae were studied: Cobitis choii Kim et Son, 1984; Opsariichthys uncirostris (Temminck et Schlegel, 1846); Zacco platypus (Temminck et Schlegel, 1846); Tanakia lanceolata (Temminck et Schlegel, 1846); Acheilognathus rhombeus (Temminck et Schlegel, 1846); Hemibarbus labeo (Pallas, 1776); Gobiobotia naktongensis Mori, 1935; Hemibarbus longirostris (Regan, 1908); Microphysogobio jeoni Kim et Yang, 1999; Pseudogobio esocinus (Temminck et Schlegel, 1846); Pseudorasbora parva (Temminck et Schlegel, 1846); Squalidus japonicus (Sauvage, 1883). Parameter b ranged from 2.820 (P. parva) to 3.485 (C. choii), and parameter a ranged from 0.0015 (C. choii) to 0.0145 (A. rhombeus). The LWR for C. choii and G. naktongensis, endangered species in South Korea, was estimated for the first time. Our results could be useful as baseline information for evaluating population status.

HTML

XML

PDF

]]>
Short Communication Thu, 10 Feb 2022 10:56:35 +0200
First records of the seamoth, Pegasus nanhaiensis (Actinopterygii: Syngnathiformes: Pegasidae), from the southern South China Sea, with notes on fresh coloration https://aiep.pensoft.net/article/78260/ Acta Ichthyologica et Piscatoria 52(1): 1-8

DOI: 10.3897/aiep.52.78260

Authors: Takahiro Akaike, Sirikanya Chungthanawong, Hiroyuki Motomura

Abstract: Three seamoth specimens (45.5–56.9 mm standard length; SL) (Syngnathiformes: Pegasidae), originally identified as Pegasus laternarius Cuvier, 1829, but now recognized as representing P. nanhaiensis Zhang, Wang et Lin, 2020, a species recently described from the northern South China Sea off Yangjiang and Beihai, China, were obtained at a local fish market in Maha Chai, Samut Sakhon Province, Thailand on 6 July 2012, having been caught in the northern Gulf of Thailand. In addition, single specimens, reported as P. laternarius or Spinipegasus laternarius from Bidong Island, South China Sea off the Malay Peninsula (46.1 mm SL) and from Ko Kradat, Trat Province, eastern Gulf of Thailand (66.1 mm SL), were re-identified here as P. nanhaiensis. Thai specimens and Malaysian record represent the first records of P. nanhaiensis from Thailand and Malaysia, respectively, and from outside Chinese coastal waters. Additionally, the Bidong specimen is the southernmost record for the species. The fresh coloration of P. nanhaiensis is described for the first time.

HTML

XML

PDF

]]>
Short Communication Tue, 11 Jan 2022 16:27:02 +0200
Morphometric variation of Middle-American cichlids: Theraps– Paraneetroplus clade (Actinopterygii: Cichliformes: Cichlidae) https://aiep.pensoft.net/article/69363/ Acta Ichthyologica et Piscatoria 51(4): 403-412

DOI: 10.3897/aiep.51.69363

Authors: Yanet Elizabeth Aguilar-Contreras, Alfonso A. González-Díaz, Omar Mejía, Rocío Rodiles-Hernández

Abstract: This study assesses the patterns of variation in body shape, and relations of morphological similarity among species of the Theraps–Paraneetroplus clade in order to determine whether body shape may be a trait in phylogenetic relations. A total of 208 specimens belonging to 10 species of the Theraps–Paraneetroplus clade were examined. The left side of each specimen was photographed; in each photograph, 27 fixed landmarks were placed to identify patterns in body shape variation. Images were processed by using geometric morphometrics, followed by a phylogenetic principal component analysis. The phylogenetic signal for body shape was then calculated. To determine the relations in morphological similarity, a dendrogram was created using the unweighted pair group method and arithmetic mean values, while a Procrustes ANOVA and post-hoc test were used to evaluate significant differences between species and habitats. We found three morphological groups that differed in body length and depth, head size, and the position of the mouth and eyes. The body shape analysis recovered the morphotypes of seven species, and statistical differences were demonstrated in eight species. Based on traits associated with cranial morphology, Wajpamheros nourissati (Allgayer, 1989) differed the most among the species examined. No phylogenetic signal was found for body shape; this trait shows independence from ancestral relatedness, indicating that there is little congruence between morphological and genetic interspecific patterns. As evidenced by the consistently convergent morphology of the species in the Theraps–Paraneetroplus clade, the diversification of the group is related to an ecological opportunity for habitat use and the exploitation of food resources. Although no phylogenetic signal was detected for body shape, there appears to be an order associated with cranial morphology-based phylogeny. However, it is important to evaluate the intraspecific morphologic plasticity produced by ecological segregation or partitioning of resources. Therefore, future morphological evolutionary studies should consider cranial structures related to the capture and processing of food.

HTML

XML

PDF

]]>
Research Article Wed, 22 Dec 2021 07:43:49 +0200
A new record of a rare labrid, Suezichthys notatus (Actinopterygii: Labridae), from Taiwan, with comparison to related species from Taiwan https://aiep.pensoft.net/article/64061/ Acta Ichthyologica et Piscatoria 51(4): 393-401

DOI: 10.3897/aiep.51.64061

Authors: Chi-Ngai Tang, Hong-Ming Chen, Husan-Ching Ho

Abstract: Three specimens of a rare labrid, Suezichthys notatus (Kamohara, 1958) were recently collected from local markets, which were captured from deep-water off northern and southwestern Taiwan, and represent a new record for Taiwan. Suezichthys notatus can be distinguished from its congeners by a combination of characters: scale rows above lateral line 2½; low scaly sheath present at base of dorsal and anal fins; dorsal-fin element IX, 11; anal-fin elements III, 10; lateral line scales 25‒26, each with simple, unbranched laterosensory canal tube; cheek scale rows behind and below eye 2 and 2‒3 respectively; a group of prominent dark blotches extending from the interorbital region dorsoposteriorly; body depth at dorsal-fin origin 3.7‒3.9 in standard length; short pelvic fin without filamentous extension, 2.2‒2.5 in head length. Suezichthys resembles the labrid genus Pseudolabrus, comparison of Taiwanese species of Suezichthys with those of Pseudolabrus are given.

HTML

XML

PDF

]]>
Research Article Mon, 6 Dec 2021 10:38:35 +0200
First record of exotic alligator gar, Atractosteus spatula (Actinopterygii: Lepisosteiformes: Lepisosteidae), from Ganga River system, India: A possible threat to indigenous riverine fish diversity https://aiep.pensoft.net/article/72676/ Acta Ichthyologica et Piscatoria 51(4): 385-391

DOI: 10.3897/aiep.51.72676

Authors: Ranjan Kumar Manna, Archisman Ray, Supriti Bayen, Tanushree Bera, Debashis Palui, Basanta Kumar Das

Abstract: A new record of an exotic alligator gar, Atractosteus spatula (Lacepède, 1803), from an open wetland of the Ganga River was presented in this paper and discussed along with the environmental parameters. Entry of the exotic fish into the natural system was probably a result of uncontrolled ornamental fish trading. Considering threats of this predatory fish to become invasive and disturb riverine fish diversity, possible ways to avoid such risk have been discussed.

HTML

XML

PDF

]]>
Short Communication Mon, 29 Nov 2021 14:46:16 +0200
New record of Pterois cf. miles (Actinopterygii: Scorpaeniformes: Scorpaenidae) from the eastern middle Adriatic Sea (Croatian waters): Northward expansion https://aiep.pensoft.net/article/75811/ Acta Ichthyologica et Piscatoria 51(4): 379-383

DOI: 10.3897/aiep.51.75811

Authors: Branko Dragičević, Pero Ugarković, Maja Krželj, Damir Zurub, Jakov Dulčić

Abstract: A single specimen of Pterois cf. miles has been recorded in the eastern middle Adriatic Sea. It was observed near the island of Vis at a depth of 15 m. The location of the record is further north than previous Adriatic records and it constitutes the northernmost record of this species in the Mediterranean Sea to date. The record is based solely on photographs and video footage provided by a professional underwater photographer.

HTML

XML

PDF

]]>
Short Communication Mon, 29 Nov 2021 14:45:51 +0200
Age and growth estimates from three hard parts of the spotted catfish, Arius maculatus (Actinopterygii: Siluriformes: Ariidae), in Songkhla Lake, Thailand’s largest natural lake https://aiep.pensoft.net/article/74082/ Acta Ichthyologica et Piscatoria 51(4): 371-378

DOI: 10.3897/aiep.51.74082

Authors: Penprapa Phaeviset, Pisit Phomikong, Piyathap Avakul, Sontaya Koolkalaya, Wachira Kwangkhang, Chaiwut Grudpan, Tuantong Jutagate

Abstract: The spotted catfish, Arius maculatus (Thunberg, 1792), is a euryhaline fish that is economically important in the Indo-West Pacific. Population dynamics studies and stock assessments of this species have focused on marine stocks, but not those from fresh water. In this study, the age and growth of A. maculatus were, therefore, investigated for the inland stock in Songkhla Lake, Thailand. A total of 213 individuals ranging between 35 and 238 mm TL were used. The length–weight relation indicated positive allometry of this population. Three hard parts (otolith, dorsal- and pectoral-fin spines) were used for aging. The marginal increment ratio confirmed that an annulus was deposited once a year in all three hard parts. All of the samples were aged between 0+ and 6+ years. Verification of age estimates from three readers showed that the otolith was the most suitable part for age estimation. Three growth models (von Bertalanffy, Gompertz, and logistic) were applied in the study. The von Bertalanffy model best described the growth of this fish in Songkhla Lake. The obtained asymptotic length was 290.87 mm TL and the relative growth rate parameter was 0.166 year–1. Our results will be applied as inputs for fish stock assessment models. The obtained growth parameters also can serve as a reference for A. maculatus stocks elsewhere.

HTML

XML

PDF

]]>
Research Article Mon, 29 Nov 2021 14:45:07 +0200
A southward range extension of a wreckfish, Stereolepis doederleini (Actinopterygii: Acropomatiformes: Polyprionidae), to tropical water off eastern Taiwan https://aiep.pensoft.net/article/73207/ Acta Ichthyologica et Piscatoria 51(4): 365-370

DOI: 10.3897/aiep.51.e73207

Authors: Hsuan-Ching Ho, Chi-Ngai Tang, Chiu-Min Cheng

Abstract: A wreckfish, Stereolepis doederleini Lindberg et Krasyukova, 1969, inhabits typical cold or temperate waters and was previously known from Great Bay (Sea of Japan), Korea, south to Kyuhu-Palau Ridge of Japan. In the present report, a specimen of this fish was collected from southeastern Taiwan representing the southernmost distribution of the cold-water genus Stereolepis in the Northern Hemisphere, with a southward extension into the tropical region. It is also the first record of a member of the family Polyprionidae from Taiwan. Here we document the species found in Taiwan, with a detailed description of the specimen.

HTML

XML

PDF

]]>
Research Article Mon, 22 Nov 2021 11:13:42 +0200
Effects of synthetic androgen (17α-methyltestosterone) and estrogen (17β-estradiol) on growth and skin coloration in emperor red cichlid, Aulonocara nyassae (Actinopterygii: Cichliformes: Cichlidae) https://aiep.pensoft.net/article/70223/ Acta Ichthyologica et Piscatoria 51(4): 357-363

DOI: 10.3897/aiep.51.70223

Authors: Zafer Karslı

Abstract: In recent years, the use of anabolic steroids in the coloration and growth of fishes, especially ornamental ones, has attracted great interest. In the ornamental fish industry, it is economically advantageous to produce some species with high commercial value and higher demand, depending on size, color, and sex. Therefore, the most commonly used steroids in this study—i.e., 17α-MT and 17β-Es (E2)—were added to the diet of emperor red cichlid, Aulonocara nyassae Regan, 1922, which has not been previously hormone-treated and has high economic value amongst ornamental fishes. A 60-day study was conducted in a closed system, where the juveniles of the emperor red cichlid were acclimatized with the control/basal diet for 15 days. After which, 15 fish with a similar shade of color and about 5 months old were weighed individually (0.71 ± 0.01 g). All fish were placed into aquaria (30 L) in five different groups, in triplicate. Five different groups consisted of control (without hormone), 50 mg · kg–1 17α-MT, 100 mg · kg–1 17α-MT, 50 mg · kg–1 E2, and 100 mg · kg–1 E2. The fish were fed a diet twice a day (10:00 h, 17:00 h) for 60 days till satiation. During the entire trial period, a 12 h light–12 h dark photoperiod was maintained. Water temperature was measured daily and recorded. Growth parameters of experimental fish were calculated. The color measurement of fish skin (L*, a*, b* values) from around the dorsal section was performed using a colorimeter (Konica Minolta CR 400). Significant differences were determined in the following parameters: weight gain (WG), specific growth rate (SGR), feed conversion rate (FCR), survival rate (SR), condition factor (CF), and sex reversal. The fish group fed with 17α-MT displayed brighter coloration as compared to other groups. Color analysis (instrumental) in terms of L*, a*, and b*, values showed that the group fed with 17α-MT displayed brighter coloration compared to other groups (P < 0.05). In terms of sex reversal, the fish in the 17α-MT groups exhibited 100% masculinization, whereas in E2 supplemented fish groups (50 and 100 mg · kg–1), the feminization rates were 88.88% and 93.33%, respectively. In conclusion, both hormones were found to have positive and negative effects for this fish species, but the 17α-MT hormone was found to be more effective in reversing skin pigmentation, growth, and sexing, which is the main driver in the ornamental fish trade.

HTML

XML

PDF

]]>
Research Article Mon, 8 Nov 2021 16:36:50 +0200
The time-area fishing closure impacts on fish stock; Qiantang River before and after a four-month fishing closure https://aiep.pensoft.net/article/63815/ Acta Ichthyologica et Piscatoria 51(4): 349-356

DOI: 10.3897/aiep.51.63815

Authors: Aiju Zhang, Wei Luo, Jun Wang, Zhimin Zhou

Abstract: Fishing closures, commonly used to manage fisheries’ catch, involve temporarily closing a body of water to particular fishing gears to control fishing effort and protect feeding and spawning areas. In recent years in Qiantang River of China, with the socio-economic development, protection of fish stock has become increasingly urgent. The year 2019 was the first year that Qiantang River was included in the unified fishing ban system for the south of Yangtze River basin. Here, fish captures and hydroacoustic surveys were carried out in the research area of Qiantang River in order to present comparative descriptions of the dominant fish species, the temporal changes of fish size, density, biomass, and distribution affected by the four-month fishing closure in 2019. The results showed that Pseudobrama simoni (Bleeker, 1864) was the most dominant species both before and after the closure by using the traditional capture method. The mean target strength (TS) of overall fish after closure was –50.28 ± 0.19 dB, which was lower than that before, resulting in a significantly shorter derived mean length (13.42 ± 0.74 cm). The mean fish density and calculated biomass after closure were both significantly higher than that before it. More than 50% of fish species were distributed in the water of 5–20 m depth after the closure, which likely occurred in water deeper than 20 m before. Meanwhile, fewer outliers were found in different depth categories after closure. It is concluded that the four-month closure in 2019 had a positive effect on fish size, density, and biomass, leading to protection of pelagic fishes and a more even distribution of fish.

HTML

XML

PDF

]]>
Research Article Thu, 4 Nov 2021 09:15:02 +0200
First record of Torquigener flavimaculosus (Actinopterygii: Tetraodontiformes: Tetraodontidae) from Réunion Island https://aiep.pensoft.net/article/70917/ Acta Ichthyologica et Piscatoria 51(4): 345-348

DOI: 10.3897/aiep.51.70917

Authors: Jean Gadenne, Patrick Durville, Julien Wickel, Eric Hoarau, Arnault Gauthier, Ronald Fricke

Abstract: The first record of the yellow-spotted puffer, Torquigener flavimaculosus Hardy et Randall, 1983, on Reunion Island is confirmed by numerous video observations and by the capture of a specimen. This tetraodontid fish has been reported from the western Indian Ocean, the Red Sea, and the Mediterranean. In this report, we confirm its presence in Saint-Paul Bay in Réunion and this new observation completes the ichthyological inventory of Réunion Island.

HTML

XML

PDF

]]>
Short Communication Tue, 2 Nov 2021 08:08:51 +0200
New record of Neoclinus lacunicola (Actinopterygii: Perciformes: Chaenopsidae) from Ulleung Island, Korea revealed by body morphometry and mitochondrial DNA barcoding https://aiep.pensoft.net/article/67056/ Acta Ichthyologica et Piscatoria 51(4): 339-344

DOI: 10.3897/aiep.51.67056

Authors: Se Hun Myoung, Laith A. Jawad, Joo Myun Park

Abstract: One specimen (38.3 mm SL) of Neoclinus lacunicola Fukao, 1980, belonging to the family Chaenopsidae, was first recorded from Ulleung Island, Korea (East Sea, otherwise known as the Sea of Japan) on 5 January 2021. This species was characterized by paired external pores of incomplete lateral line running from the upper margin of the opercle, seven pairs of supraorbital cirri arranged in two rows, occipital region with a pair of cirri, and 13 rays of pectoral fin. This species is morphologically similar to the Neoclinus toshimaensis Fukao, 1980, but differs in the number of cirri on the supraorbital (6–7 versus 9–11 cirri). This study documents the first report of N. lacunicola in Korean waters and proposes the new Korean name of ‘eol-lug-bi-neul-be-do-la-chi’ for the species. For the confirmation of the identity of the species, a partial gene sequence of the mt COI (570 bp) of N. lacunicola was obtained for the first time.

HTML

XML

PDF

]]>
Short Communication Fri, 1 Oct 2021 08:36:38 +0300
Dietary live yeast (Debaryomyces hansenii) provides no advantages in tropical gar, Atractosteus tropicus (Actinopterygii: Lepisosteiformes: Lepisosteidae), juvenile aquaculture https://aiep.pensoft.net/article/67095/ Acta Ichthyologica et Piscatoria 51(3): 311-320

DOI: 10.3897/aiep.51.67095

Authors: Iris Adriana Hernández-López, Dariel Tovar-Ramírez, Susana De la Rosa-García, Carina Shianya Álvarez-Villagómez, Gloria Gertrudys Asencio-Alcudia, Talhia Martínez-Burguete, Mario Alberto Galaviz, Rocío Guerrero-Zárate, Rafael Martínez-García, Emyr Saúl Peña-Marín, Carlos Alfonso Álvarez-González

Abstract: Tropical gar, Atractosteus tropicus Gill, 1863, is an ancient freshwater fish that is commercially cultivated in southern Mexico. Currently, there is a specific diet for its culture; however, the addition of probiotics has not been investigated. The objective of this study was to evaluate the supplementation of live yeast Debaryomyces hansenii for A. tropicus juveniles on growth, productive parameters, survival, somatic index, digestive enzyme activity, and immune system gene expressions (interleukin 10, il-10, Transforming growth factor β1, tgf-β1, and β2 microglobulin, b2m). Three experimental diets increased the dose of live yeast (0.5, 1.0, and 1.5%; 1014, 1015, and 1016 CFU g diet–1, respectively) and a control diet (CD; without yeast) were designed. Daily weight gain and specific growth rate were higher in fish fed with CD and 0.5% D. hansenii. High activities of trypsin, chymotrypsin LAP, and α-amylase, as well as overexpression of il-10 in the spleen, were detected in fish feed 0.5% D. hansenii. The inclusion of D. hansenii had no positive effect on aquaculture for A. tropicus, lower doses should be tested to optimize the diet.

HTML

XML

PDF

]]>
Research Article Mon, 13 Sep 2021 11:52:18 +0300
Population characteristics of the non-indigenous round goby, Neogobius melanostomus (Actinopterygii: Perciformes: Gobiidae), in the eastern Gulf of Finland https://aiep.pensoft.net/article/68601/ Acta Ichthyologica et Piscatoria 51(3): 327-337

DOI: 10.3897/aiep.51.68601

Authors: Anton Uspenskiy, Anastasia Yurtseva, Dmitry Bogdanov

Abstract: The round goby, Neogobius melanostomus (Pallas, 1814), is a fish of Ponto-Caspian origin that has been invading the Baltic Sea since the 1990s. Currently, it is abundant and commercially important in some areas of the sea. This species was first reported in the eastern Gulf of Finland (GoF) in 2012. Its occurrence increased thereafter, however it has remained largely unstudied in this region. The aim of this study was to investigate the population characteristics of the round goby in the eastern GoF to better understand its expansion trend and whether it will become abundant enough to be exploited by the local fishery. Fish were caught using multi-mesh gillnets (12–60 mm mesh) and a beach seine (0.5–10 mm mesh). Occurrence, density, catch per unit effort, biomass per unit effort, relative number and biomass in catches, as well as age, size and sex ratio were studied. The species regularly occurred in samplings along the southern coastline of the GoF, as well as some central areas and along the northern coast. Within 2012–2019, its occurrence in catches increased, with the highest frequency in 2015–2019 in shallow waters (<1.5 m) of Koporye Bay (70%) and in the deeper waters of Narva Bay (74%). Similarly, the highest density in the shallow waters was also observed in Koporye Bay (10.0 ind. ∙ 100 m−2), and offshore in Narva Bay. Relative abundance and biomass usually did not exceed 23%, although it reached 93% in Narva Bay. The oldest specimen was five years old. Young-of-the-year (YOY) juveniles predominated in the shallow waters (85%), while three-year-olds prevailed in deeper waters (75%). Among the fish older than two years, females were more predominant (mean ratio 3 to 1), and males were larger than females. Specimens in all life stages were found in the eastern GoF, and their abundance increased annually, suggesting that the round goby has successfully colonized this region of the Baltic Sea. However, compared to other areas of the Baltic Sea inhabited by longer-established populations, its population size is still relatively low.

HTML

XML

PDF

]]>
Research Article Mon, 13 Sep 2021 11:42:18 +0300
Grunts (Actinopterygii: Perciformes: Haemulidae) of Bangladesh with two new distributional records from the northern Bay of Bengal assessed by morphometric characters and DNA barcoding https://aiep.pensoft.net/article/67043/ Acta Ichthyologica et Piscatoria 51(3): 299-309

DOI: 10.3897/aiep.51.67043

Authors: Kazi Ahsan Habib, Md Jayedul Islam, Najmun Nahar, Mohammad Rashed, Amit Kumer Neogi, Barry Russell

Abstract: Grunts (family Haemulidae) are among the most commercially important fish in Bangladesh. This paper provides brief diagnostic characters of five previously reported grunt species: Plectorhinchus pictus (Thunberg, 1792); Pomadasys andamanensis McKay et Satapoomin, 1994; Pomadasys argenteus (Forsskål, 1775); Pomadasys argyreus (Valenciennes, 1833); Pomadasys maculatus (Bloch, 1793) and two new distributional records: Pomadasys guoraca (Cuvier, 1829) and Plectorhinchus macrospilus Satapoomin et Randall, 2000. The fishes were collected from the Saint Martin’s Island coral reef-like ecosystem and the adjacent sea of the Sundarbans mangrove forest of Bangladesh. The examined specimens were identified and diagnosed based on their morphometric characters and DNA barcoding COI gene. The new records of Pomadasys guoraca and Plectorhinchus macrospilus from Bangladesh greatly extend their distributional range in the Bay of Bengal. An updated checklist of grunts of Bangladesh is provided.

HTML

XML

PDF

]]>
Research Article Mon, 13 Sep 2021 09:52:04 +0300
Effect of dietary lipid levels on growth, body composition, and enzyme activities of larvae of butter catfish, Ompok bimaculatus (Actinopterygii: Siluriformes: Siluridae) https://aiep.pensoft.net/article/67079/ Acta Ichthyologica et Piscatoria 51(3): 289-298

DOI: 10.3897/aiep.51.67079

Authors: Baidya Nath Paul, Debnarayan Chowdhury, Arabinda Das, Rathindra Nath Mandal, Puja Singh, Subhendu Adhikari, Partha Pratim Chakrabarti, Shiba Sankar Giri, Koushik Ghosh

Abstract: The Indian butter catfish, Ompok bimaculatus (Bloch, 1794), is a high-value catfish that has gained immense consumer preference in South-East Asia. However, information on the nutritional requirements of this species is scanty. Hence, an experiment was conducted to evaluate the effects of varying dietary lipid levels on growth, body composition, and activities of digestive and metabolic enzymes in larvae. Three isonitrogenous (40% crude protein) diets were formulated by supplementing fish and vegetable oil (1:1) at 4.5% (D1), 7% (D2), and 9.5% (D3) levels (containing crude lipid 5.7%, 8.0%, and 10.45%, respectively in diets D1–D3) to a fish meal- and oilcake-based formulated diet. Experimental diets were fed to butter catfish larvae (0.15 ± 0.01 g) in triplicate groups for a period of 42 days. Proximate compositions of the experimental diets, as well as fish carcass, were analyzed using standard procedures (AOAC 2005). Digestive and metabolic enzyme activities were analyzed at the completion of the experiment by standard methodology. Butter catfish larvae fed the diet D2 (8% crude lipid) resulted in the best performance in terms of weight gain (final weight 1.40 ± 0.07 g), net weight gain (1.31 ± 0.06 g), specific growth rate (5.50 ± 0.05% · day−1), and protein efficiency ratio (2.39 ± 0.17). The highest lipid deposition (2.90 ± 0.12%) in the carcass was also recorded in fish reared on diet D2. The final weight, net weight gain, protein efficiency ratio, and specific growth rate were significantly (P < 0.05) higher in D2 having 8% lipid. Moisture and lipid contents of the whole body were significantly (P < 0.05) higher in larvae fed diet D2. Amylase activity in fish significantly (P < 0.05) decreased with increasing dietary lipid levels. The maximum alkaline protease, pepsin, and lipase activities were noticed in the larvae fed diet D2. Progressive decrease in liver glucose-6-phosphate dehydrogenase activities and significant increase (P < 0.05) in the activities of neoglucogenic enzymes (glucose-6-phosphatase and fructose-1,6-bis phosphatase) were noticed with an increase in dietary lipid levels. Significantly lower (P < 0.05) activities of LDH, ALT, and AST were recorded in the group fed diet D2. Results of the study indicated that 8% crude lipid in the diet could assure optimum growth and survival of butter catfish larvae during early development. An appraisal on growth, body composition, and digestive as well as metabolic function in the butter catfish larvae recorded in the study might provide some important information to consider application of formulated diets for the larviculture of Ompok bimaculatus.

HTML

XML

PDF

]]>
Research Article Mon, 13 Sep 2021 09:51:11 +0300
A candiru, Paracanthopoma sp. (Siluriformes: Trichomycteridae), associated with a thorny catfish, Doras phlyzakion (Siluriformes: Doradidae), in a tributary of the middle Rio Negro, Brazilian Amazon https://aiep.pensoft.net/article/64324/ Acta Ichthyologica et Piscatoria 51(3): 241-244

DOI: 10.3897/aiep.51.64324

Authors: Chiara C. F. Lubich, André R. Martins, Carlos E. C. Freitas, Lawrence E. Hurd, Flávia K. Siqueira-Souza

Abstract: Amazonian vampire catfish, known regionally as “candiru”, are recognized as hematophagous fishes, but information on their ecology remains limited. We provide the first report of Paracanthopoma sp. (Vandelliinae) found attached to the body surface of a thorny catfish, Doras phlyzakion Sabaj Pérez et Birindelli, 2008, bellow the lateral bony plates, rather than at the gills where they have usually been found. The specimens had not recently ingested blood or other identifiable fish remains (flesh, skin, or mucus), which could be an indication they have been using this host for protection or as a phoretic association, rather than for feeding. Thus, the interaction of vampire fish with the host catfish may be more complex than previously understood.

HTML

XML

PDF

]]>
Short Communication Thu, 9 Sep 2021 15:10:59 +0300
Age, growth, and population structure of endemic Telestes karsticus (Actinopterygii: Cyprinidae: Leuciscinae) from Sušik Creek, Croatia https://aiep.pensoft.net/article/67815/ Acta Ichthyologica et Piscatoria 51(3): 225-232

DOI: 10.3897/aiep.51.67815

Authors: Zoran Marćić, Irena Komljenović, Marko Ćaleta, Ivana Buj, Davor Zanella, Perica Mustafić

Abstract: This study provides the first description of the age, growth, and population structure of the endemic karstic dace, Telestes karsticus Marčić et Mrakovčić, 2011, from Sušik Creek in Croatia. The oldest individual in the sample was a female of age 5+ years and the oldest males were 4+. Females of the karstic dace have a higher maximum standard length than males (122.0 vs. 95.1 mm, respectively). In both sexes, the most numerous length category was 41–50 mm. The most numerous age group of karstic dace was 1+, with a gradual decline in the abundance of older age groups. In larger length categories, males were fewer, while females showed a bimodal distribution with a second maximum in the length category of 81–90 mm. The total ratio of males to females in the sample was 2.8:1, in favor of males.

HTML

XML

PDF

]]>
Research Article Thu, 9 Sep 2021 14:17:14 +0300
After four decades—Occurrence of the daggertooth pike conger, Muraenesox cinereus (Actinopterygii: Anguilliformes: Muraenesocidae), in the Mediterranean Sea https://aiep.pensoft.net/article/65703/ Acta Ichthyologica et Piscatoria 51(3): 245-248

DOI: 10.3897/aiep.51.65703

Authors: Erhan Irmak, Uğur Özden

Abstract: In October 2020, a single specimen of the daggertooth pike conger, Muraenesox cinereus (Forsskål, 1775), was caught by longline at a depth of 120 m, from the Mediterranean coast of Turkey. This species has been recorded from the Mediterranean for the second time after approximately four decades. This new finding shows that the distribution of the species has expanded.

HTML

XML

PDF

]]>
Short Communication Thu, 9 Sep 2021 10:46:12 +0300
Length–weight analysis of ten species (Actinopterygii) supporting subsistence fishery in Lakshadweep waters, southern Arabian Sea https://aiep.pensoft.net/article/64632/ Acta Ichthyologica et Piscatoria 51(3): 257-261

DOI: 10.3897/aiep.51.64632

Authors: Pentam Veli Pura Shahul Hameed, Aliyyathumada Ishyyapura Muhsin, Pathummathada Pookoya, Kutty Ranjeet

Abstract: The length–weight relations of ten fish species representing eight genera and four families and that formed the backbone of the subsistence fishery in the Lakshadweep islands were estimated. These fishes which included four species of tuna [Katsuwonus pelamis (Linnaeus, 1758); Thunnus albacares (Bonnaterre, 1788); Auxis thazard (Lacepède, 1800); Euthynnus affinis (Cantor, 1849)], three species of needlefishes[Ablennes hians (Valenciennes, 1846); Tylosurus crocodilus (Péron et Leseur, 1821); Tylosurus acus melanotus (Bleeker, 1850)], two species of bait fishes [Spratelloides delicatulus (Bennett, 1832); Spratelloides gracilis (Temminck et Schlegel, 1846)], and one species of halfbeak (Hemiramphus archipelagicus Collette et Parin, 1978) contributed to 96% of the total fish landings. The samples were collected from fish landing centers of ten inhabited islands of Lakshadweep from 2015 to 2017. Katsuwonus pelamis showed isometric growth, S. delicatulus and S. gracilis exhibited positive allometry, while negative allometric growth was seen in other species. The coefficient a of the LWR ranged from 0.001 (A. hians) to 0.035 (T. albacares), while b ranged from 2.7 (T. acus melanotus) to 3.4 (S. delicatulus). The results of the presently reported study provide useful biological information on the stock of ten commercially important pelagic fish species supporting the traditional fisheries in Lakshadweep waters.

HTML

XML

PDF

]]>
Short Communication Thu, 9 Sep 2021 10:37:22 +0300
Length–weight relations of 14 fish species (Actinopterygii) from the Chalakudy River, Western Ghats, India https://aiep.pensoft.net/article/65713/ Acta Ichthyologica et Piscatoria 51(3): 263-265

DOI: 10.3897/aiep.51.65713

Authors: Chelapurath Radhakrishnan Renjithkumar, Kuttanelloor Roshni, Kutty Ranjeet

Abstract: Length–weight relations of 14 fish species caught by small-scale fishery from the Chalakudy River of the Western Ghats biodiversity hotspot, India were analyzed from April 2018 to March 2019. The following species were studied: Amblypharyngodon microlepis (Bleeker, 1853); Dawkinsia filamentosa (Valenciennes, 1844); Puntius mahecola (Valenciennes, 1844); Osteobrama bakeri (Day, 1873); Labeo dussumieri (Valenciennes, 1842); Channa marulius (Hamilton, 1822); Channa striata (Bloch, 1793); Horabagrus brachysoma (Günther, 1864); Mystus armatus (Day, 1865); Pangasianodon hypophthalmus (Sauvage, 1878); Heteropneustes fossilis (Bloch, 1794); Etroplus suratensis (Bloch, 1790); Megalops cyprinoides (Broussonet, 1782); Parambassis thomassi (Day, 1870). The main fishing gear that was used in the data collection were gill nets, seine nets, and cast nets. The b values in the LWRs ranged from 2.649 (L. dussumieri) to 3.023 (P. hypophthalmus). This study reports the first LWR reference for five species and new maximum total lengths for five species. The results provide baseline information for the sustainable management and conservation of the studied species.

HTML

XML

PDF

]]>
Short Communication Thu, 9 Sep 2021 10:28:36 +0300
Length–weight relations for 14 fish species (Actinopterygii) from the coastal waters off Gwangyang Bay, South Korea https://aiep.pensoft.net/article/66951/ Acta Ichthyologica et Piscatoria 51(3): 267-269

DOI: 10.3897/aiep.51.66951

Authors: Tae-Sik Yu, Hyunbin Jo, Dong-Kyun Kim, Ihn-Sil Kwak

Abstract: Length–weight relations were estimated for 14 fish species sampled from the coastal waters off the Gwangyang Bay in South Korea. The following species were studied: Okamejei kenojei (Müller et Henle, 1841); Muraenesox cinereus (Forsskål, 1775); Thryssa adelae (Rutter, 1897); Thryssa kammalensis (Bleeker, 1849); Tribolodon hakonensis (Günther, 1877); Inimicus japonicus (Cuvier, 1829); Chelidonichthys spinosus (McClelland, 1844); Jaydia lineata (Temminck et Schlegel, 1842); Sillago japonica Temminck et Schlegel, 1843; Pholis nebulosa (Temminck et Schlegel, 1845); Favonigobius gymnauchen (Bleeker, 1860); Pampus echinogaster (Basilewsky, 1855); Cynoglossus joyneri Günther, 1878; Takifugu niphobles (Jordan et Snyder, 1901).The length–weight relation of Thryssa adelae (Rutter, 1897), (Engraulidae) has not been previously reported. The new maximum total length of Thryssa kammalensis (18.0 cm) is now provided. The values of coefficient a ranged from 0.0007 to 0.0218, and the values of exponent b ranged from 2.82 to 3.52.

HTML

XML

PDF

]]>
Short Communication Thu, 9 Sep 2021 10:12:25 +0300
Length–weight relations of 11 goby species (Actinopterygii: Gobiiformes) from mangroves along the Ba Lat estuary of the Red River, Vietnam https://aiep.pensoft.net/article/64918/ Acta Ichthyologica et Piscatoria 51(3): 271-274

DOI: 10.3897/aiep.51.64918

Authors: Hau Duc Tran, Anh Thi Nguyen, Nam Hoang Chu, Trang Thi Huyen Nguyen, Thuy Thi Ta, Hung Phuc Nguyen, Long Van Pham, Linh Manh Ha

Abstract: Presently reported study examined the length–weight relations for 11 goby species collected from a mangrove estuary of the Red River, Vietnam. A total of 1097 individuals of the following species, representing three goby families, were analyzed: Butis butis (Hamilton, 1822); Butis koilomatodon (Bleeker, 1849); Acentrogobius moloanus (Herre, 1927); Acentrogobius viridipunctatus (Valenciennes, 1837); Apocryptodon madurensis (Bleeker, 1849); Aulopareia unicolor (Valenciennes, 1837); Glossogobius giuris (Hamilton, 1822); Gobiopsis macrostoma Steindachner, 1861; Mugilogobius abei (Jordan et Snyder, 1901); Tridentiger barbatus (Günther, 1861); and Tridentiger trigonocephalus (Gill, 1859). The regression slope values (b) ranged from 2.909 to 3.621. The majority of species had positive allometric or isometric growth pattern with b ≥ 3, except for only one species (G. giuris) which had a negative allometric growth with b = 2.909. This study provided the first LWR information of four gobies that have not been reported in FishBase yet. Besides, the reference for LWRs of other gobies at an ecologically important area like Ba Lat Estuary is also provided.

HTML

XML

PDF

]]>
Short Communication Thu, 9 Sep 2021 10:08:15 +0300
Non-invasive ploidy determination in live fish by measuring erythrocyte size in capillaries https://aiep.pensoft.net/article/65718/ Acta Ichthyologica et Piscatoria 51(3): 275-280

DOI: 10.3897/aiep.51.65718

Authors: Karel Halačka, Karel Janko, Lukáš Vetešník

Abstract: Information about ploidy is important in both commercial and conservation aquaculture and fish research. Unfortunately, methods for its determination, such as karyology, determination of the amount of DNA in a cell using microdensitometry or flow cytometry and/or measuring erythrocytes in a blood smear can be stressful or even destructive. Some of these methods are also limited by the relatively large minimum size of the individual being measured. The aim of this study was to test a new low-stress method of determining ploidy by measuring the size of erythrocytes in the capillaries of a fish, including small individuals. First, we examined diploid and triploid loach (Cobitis sp.) and gibel carp, Carassius gibelio (Bloch, 1782), using flow cytometry and blood smears, with these results being used as a control. Subsequently, we measured the size of erythrocytes in the caudal fin capillaries of anesthetized fishes of known ploidy under a light microscope. For both the loaches and gibel carp, direct observation of the mean erythrocyte size in epithelial fin capillaries provided a consistent and reliable determination of ploidy when compared with the controls based on flow cytometry and blood smears. This new method allows for rapid determination of ploidy in living small fish, where collection of tissue using other methods may cause excessive stress or damage. The method outlined here simply requires the measurement of erythrocytes directly in the bloodstream of a live fish, thereby making it possible to determine ploidy without the need for blood sampling. The method described is sufficiently efficient, less demanding on equipment than many other procedures, can be used by relatively inexperienced personnel and has benefits as regards animal welfare, which is especially important for fish production facilities or when dealing with rare or endangered species.

HTML

XML

PDF

]]>
Research Article Thu, 9 Sep 2021 09:55:50 +0300
Genetic diversity of the yellowfin seabream, Acanthopagrus latus (Actinopterygii: Perciformes: Sparidae)—An enhancement species in Dongshan Bay https://aiep.pensoft.net/article/66894/ Acta Ichthyologica et Piscatoria 51(3): 281-287

DOI: 10.3897/aiep.51.66894

Authors: Cheng Liu, Jing Zhang, Shigang Liu, Puqing Song, Ying Guan, Binbin Shan, Yuan Li, Longshan Lin

Abstract: Dongshan Bay is located on the west side of the Taiwan Strait, which had abundant fishery resources in the past. With the increase in fishing pressure, resources have declined. To restore the fishery resources in Dongshan Bay and to increase fishing yield, much enhancement and release work has been carried out in Dongshan Bay. The yellowfin seabream, Acanthopagrus latus (Houttuyn, 1782), is an important enhancement species in Dongshan Bay that is also frequently captured. Due to yearly progress in enhancement and release, it is necessary to study the current status of the genetic diversity of yellowfin seabream in Dongshan Bay. The results show that all yellowfin seabream populations have high genetic diversity, which is mainly related to its breeding habits and growth rate, and this ensures a large recruitment stock in the natural seas. The current population has differentiated from the historical population due to a change in genetic structure, and many historical haplotypes have been lost. The results of this study provide a reference for fishery management departments to formulate management measures and conservation policies specifically for yellowfin seabream. In particular, yellowfin seabream is a hermaphroditic and protandrous species. Targeting an older age group as the main fishing subject is not conducive to its breeding protection and resource growth, and therefore, fishing of an older age group should be restricted in fishery production.

HTML

XML

PDF

]]>
Research Article Thu, 9 Sep 2021 09:50:24 +0300
First record of slender red scad, Decapterus smithvanizi (Actinopterygii: Perciformes: Carangidae), from the Philippines https://aiep.pensoft.net/article/63117/ Acta Ichthyologica et Piscatoria 51(3): 233-239

DOI: 10.3897/aiep.51.63117

Authors: Emmanuel S. Delloro Jr., Ricardo P. Babaran, Arnold C. Gaje, Pearlyn T. Cambronero, Ulysses B. Alama, Hiroyuki Motomura

Abstract: Ten specimens (187.3–226.9 mm standard length) of slender red scad, Decapterus smithvanizi Kimura, Katahira et Kuriiwa, 2013, previously reported from the Andaman Sea, South China Sea, Taiwan, Japan, Thailand, Indonesia, Myanmar, and Pakistan, were collected off Iloilo (Panay Island), the Philippines. The presently reported specimens represent the first record of the species from the Philippines. A detailed description of the specimens is provided, with a comparison to other commonly-caught species of red-fin Decapterus in the area.

HTML

XML

PDF

]]>
Research Article Thu, 9 Sep 2021 08:14:19 +0300
A new record of the brassy chub, Kyphosus vaigiensis (Actinopterygii: Perciformes: Kyphosidae), from the Mediterranean Sea https://aiep.pensoft.net/article/64069/ Acta Ichthyologica et Piscatoria 51(2): 219-223

DOI: 10.3897/aiep.51.64069

Authors: Lilia Labiba Groud, Lamya Chaoui, M. Hichem Kara

Abstract: One individual of the brassy chub, Kyphosus vaigiensis (Quoy et Gaimard, 1825) (41.5 cm TL, 1.27 kg TW), was caught off Annaba, on the eastern coasts of Algeria in December 2013. This circumtropical fish is found for the first time on the south-western Mediterranean coasts. The chronology of its records in the Mediterranean supports the hypothesis of its Atlantic origin.

HTML

XML

PDF

]]>
Short Communication Mon, 12 Jul 2021 15:07:16 +0300
Using otoliths for fish stock discrimination: status and challenges https://aiep.pensoft.net/article/64166/ Acta Ichthyologica et Piscatoria 51(2): 199-218

DOI: 10.3897/aiep.51.64166

Authors: Aafaq Nazir, Mohammad Afzal Khan

Abstract: Otoliths are calcified structures and the information contained within their chemistry or shape can be used to infer life history events, migration patterns, and stock structure of a fish population. Understanding how otolith chemistry is affected by temperature, salinity, interactive effects of abiotic factors, ontogeny, physiology, etc. is essential for the reconstruction of the environment that affected the fish. Otolith shape is also affected by environmental conditions in addition to the genotype. The applications of otolith chemistry and shape for stock discrimination have increased in recent years because of the advancements in analytical methods and the related software. The stock identification methods sometimes provide variable results but if we use complementary approach the information generated could be more reliable which can be used to prepare effective management and conservation strategies. It appears warranted to generate more information on the factors influencing otolith chemistry and shape especially when two or more factors exert synergetic influence. Therefore, the objectives of this review paper were to provide comprehensive information on various factors influencing the otolith chemistry and shape, and the utility of otolith chemistry and shape for fish stock discrimination with an emphasis towards the research areas needing additional studies.

HTML

XML

PDF

]]>
Review Article Mon, 12 Jul 2021 15:04:44 +0300
Investigating otolith mass asymmetry in six benthic and pelagic fish species (Actinopterygii) from the Gulf of Tunis https://aiep.pensoft.net/article/64220/ Acta Ichthyologica et Piscatoria 51(2): 193-197

DOI: 10.3897/aiep.51.64220

Authors: Nawzet Bouriga, Marwa Mejri, Monia Dekhil, Safa Bejaoui, Jean-Pierre Quignard, Monia Trabelsi

Abstract: Otolith mass asymmetry can significantly affect the vestibular system functionalities; usually, the X values of mass asymmetry vary between −0.2 and + 0.2 (−0.2 < X < + 0.2). These values can change during a fish life and therefore they are not related to the fish total length. We collected a total of 404 fish specimens from the Gulf of Tunis, including three pelagic species: Sardina pilchardus (Walbaum, 1792) (74 otolith pairs), Trachurus mediterraneus (Steindachner, 1868) (66 otolith pairs), and Chelon auratus (Risso, 1810) (60 otolith pairs) and three benthic species: Gobius niger Linnaeus, 1758 (77 otolith pairs), Mullus barbatus Linnaeus, 1758 (60 otolith pairs), and Trachinus draco Linnaeus, 1758 (67 otolith pairs). The relation between the total length and the otolith mass asymmetry was first calculated and compared, and then was evaluated. The comparison of the otolith mass asymmetry between benthic and pelagic species showed a significant difference (P < 0.05), where the absolute mean value of X does not exceed the critical value (0.2) for all the studied species. No relation has been found between the magnitude of the otolith mass asymmetry and the length in both benthic and pelagic specimens. Environmental factors have an indirect effect on somatic growth and otolith accretion. The significant difference found in this study can be due to the difference between the benthic and pelagic environments.

HTML

XML

PDF

]]>
Research Article Mon, 12 Jul 2021 15:02:43 +0300