Selection for adaptation to dietary shifts: towards sustainable breeding of carnivorous fish
Le Boucher , Richard (INRA , Jouy-En-Josas (France). UMR 1313 Génétique Animale et Biologie Intégrative) | Dupont-Nivet , Mathilde (INRA , Jouy-En-Josas (France). UMR 1313 Génétique Animale et Biologie Intégrative) | Vandeputte , Marc (INRA , Jouy-En-Josas (France). UMR 1313 Génétique Animale et Biologie Intégrative) | Kerneis , Thierry (INRA , Sizun (France). UE 0937 Pisciculture Expérimentale INRA des Monts d'Arrée) | Goardon , Lionel (INRA , Sizun (France). UE 0937 Pisciculture Expérimentale INRA des Monts d'Arrée) | Labbé , Laurent (INRA , Sizun (France). UE 0937 Pisciculture Expérimentale INRA des Monts d'Arrée) | Chatain , Béatrice (Institut Français de Recherche pour l'Exploitation de la Mer, Palavas les Flots(France). UMR110 Intrepid) | Bothaire , Marie Josée (Institut National de la Recherche Agronomique, Saint Pée sur Nivelle(France). UMR1067 NuMeA Nutrition, Metabolism, Aquaculture) | Larroquet , Laurence (INRA , Saint-Pee-Sur-Nivelle (France). UR 1067 Nutrition, Métabolisme, Aquaculture ) | Medale , Francoise (INRA , Saint-Pee-Sur-Nivelle (France). UR 1067 Nutrition, Métabolisme, Aquaculture ) | Quillet , Edwige (INRA , Jouy-En-Josas (France). UMR 1313 Génétique Animale et Biologie Intégrative)
Genetic adaptation to dietary environments is a key process in the evolution of natural populations and is of great interest in animal breeding. In fish farming, the use of fish meal and fish oil has been widely challenged, leading to the rapidly increasing use of plant-based products in feed. However, high substitution rates impair fish health and growth in carnivorous species. We demonstrated that survival rate, mean body weight and biomass can be improved in rainbow trout (Oncorhynchus mykiss) after a single generation of selection for the ability to adapt to a totally plant-based diet (15.1%, 35.3% and 54.4%, respectively). Individual variability in the ability to adapt to major diet changes can be effectively used to promote fish welfare and a more sustainable aquaculture.
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