DOI: 10.3897/aiep.56.191711

Authors: Mónica Jimena Juárez-Maldonado, Luis Fernando Del Moral-Flores

Abstract: We studied the morphological variation of the chain dogfish, Scyliorhinus retifer (Garman, 1881), to demonstrate sexual dimorphism based on 15 adult males {434–557 mm total length (TL)} and 10 adult females (437–556 mm TL) captured in the southern Gulf of Mexico. We took 60 morphological measurements, 12 of which showed significant differences between the sexes. Analysis of dermal denticle (DDs) density and shape showed variation by sex in the four regions: dorsal (females: 105–353 mm–2; males: 112–530 mm–2), ventral (females: 142–456 mm–2; males: 168–488 mm–2), lateral (females: 93–396 mm–2; males: 96–380 mm–2), and anterior dorsal (females: 209–490 mm–2; males: 254–534 mm–2). There were also significant differences within the same sex in the length of the DDs of the dorsal region, the length of the DDs of the anterior dorsal region, the width of the DDs of the anterior dorsal region, and the length and width of the DDs of the lateral region.

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DOI: 10.3897/aiep.55.172991

Authors: Hsuan-Ching Ho, Yu-Nung Cheng, Yo Su, Yu-Chieh Hsu, Jeng-Feng Shyu

Abstract: A large specimen of Neoepinnula minetomai Nakayama, Kimura et Endo, 2014 was newly reported from western Taiwan, representing the first record of its range, which extends approximately 1200 km southward from off Kagoshima to western Taiwan. The specimen agrees well with the type series, with the exception of a slightly smaller head and eye. It is suggested that this species may have a broader distribution in the northwestern Pacific Ocean, but is likely to be an insular species. A checklist of all known gempylid fishes from Taiwan is also provided.

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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.

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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.

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