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A first insight into genotype × diet interactions in European sea bass ( Dicentrarchus labrax L. 1756) in the context of plant‐based diet use
Author(s) -
Le Boucher Richard,
Vandeputte Marc,
DupontNivet Mathilde,
Quillet Edwige,
Mazurais David,
Robin Jean,
Vergnet Alain,
Médale Françoise,
Kaushik Sadasivam,
Chatain Béatrice
Publication year - 2011
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/j.1365-2109.2010.02654.x
Subject(s) - dicentrarchus , sea bass , biology , zoology , fish meal , bass (fish) , fishery , context (archaeology) , heritability , genotype , genetics , fish <actinopterygii> , gene , paleontology
This preliminary study assessed genotype × diet interaction in late growth of European sea bass ( Dicentrarchus labrax ) fed with either a fish meal (FM)‐ or a fish oil (FO)‐based diet (M) or an all‐plant‐based (PB) diet. A total of 550 fish from 224 families were reared together and tagged. DNA was sampled and microsatellites were used to assign parentage. When fish weight was 192 ± 54 g, two tanks were fed with M (FM: 100%; FO: 100%) and two others with PB (FM: 0% and FO: 0%). Body weight (BW), fork length (FL) and fillet lipid content ( CorrFat ) were analysed with a linear model and with REML methodology. We observed no significant differences between groups, but a slightly lower ( P =0.03) daily growth coefficient in sea bass fed PB than in those fed M. Heritability estimates of BW differed significantly from zero (PB: 0.37 ± 0.18; M: 0.47 ± 0.24). Sire × diet interactions were significant and genetic correlations ranged between 0.51 and 0.87, showing genotype × diet interaction for BW and CorrFat . For the first time, genetic parameters in the context of total replacement of marine fishery by‐products were estimated in European sea bass, showing re‐ranking of family performances with extremely contrasted diets.