Prediction of biological form at the adult stage of brown trout Salmo trutta using morphological or colorimetric criteria in migrating juveniles

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...

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Bibliographic Details
Published in:Journal of Fish Biology
Main Authors: Le Gentil, Jérôme, Launey, Sophie, Marchand, Frédéric, Ombredane, Dominique, D., Baglinière, Jean-Luc, J.-L.
Other Authors: Écologie et santé des écosystèmes (ESE), Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST, Unité d'Ecologie et Ecotoxicologie Aquatiques (UEEA), Institut National de la Recherche Agronomique (INRA), Interreg IV B Atlantic area transnational programme (European Regional Development Fund)
Format: Article in Journal/Newspaper
Language:English
Published: HAL CCSD 2013
Subjects:
anadromy
salmonids
smoltification
ATLANTIC SALMON
L
[SDV]Life Sciences [q-bio]
Atlantic salmon
Online Access:https://hal.science/hal-01210173
https://doi.org/10.1111/jfb.12078
Description
Summary: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), markrecapture 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.

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