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Prediction of biological form at the adult stage of brown trout Salmo trutta using morphological or colorimetric criteria in migrating juveniles
Author(s) -
Le Gentil J.,
Launey S.,
Marchand F.,
Ombredane D.,
Bagliniere J.L.
Publication year - 2013
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/jfb.12078
Subject(s) - salmo , brown trout , biology , juvenile , fishery , trout , salmonidae , zoology , fish <actinopterygii> , ecology
To assess the correlation between four visual morphological types based on body colour and shape (fario trout, FT ; shiny fario, SFT ; presmolt trout, PST; typical smolt ST) of juvenile brown trout Salmo trutta during downstream spring migration and the biological form at the adult stage (river or sea), mark–recapture experiments were carried out over a period of 23 years. Evidence is provided that the visual SFT type is not a relevant one, while objective colorimetric measurements using a black basin are the best way to determine the morphological type in migrating juveniles.