Acta Ichthyologica et Piscatoria 29(1): 63-82, doi: 10.3750/AIP1999.29.1.06
Age structure of the smolts of the migratory morphotype of the brown trout (Salmo trutta m. trutta L., 1758) from the Gowienica River
expand article infoO. Antoszek

Corresponding author: O. Antoszek

© O. Antoszek.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation: Antoszek O (1999) Age structure of the smolts of the migratory morphotype of the brown trout (Salmo trutta m. trutta L., 1758) from the Gowienica River. Acta Ichthyologica et Piscatoria 29(1): 63-82. https://doi.org/10.3750/AIP1999.29.1.06
Open Access
Abstract
The present paper shows the age, mean length, and weight of smolts of the migratory morphotype of the brown trout, grown in the drainage area of the Gowienica River (Pomerania). The above parameters are given separately for both sexes and all age groups. Because the scales of the smolts were in the period of annual ring formation, the age determination was preceded by counting the annual rings and analysing the edge increments. The study was based on a total of 277 smolts acquired in four fishing seasons covering the years of 1980, 1982, 1983, and 1984.