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

• Published in: Journal of Fish Biology
• Main Authors: Le Gentil, Jérôme, Launey, Sophie, Marchand, Frédéric, Ombredane, Dominique, D., Baglinière, Jean-Luc
• 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

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.