Response to domestication and selection for growth in the European sea bass (Dicentrarchus labrax) in separate and mixed tanks |
| |
| Authors: | Marc Vandeputte Mathilde Dupont-Nivet Pierrick Haffray Hervé Chavanne Silvia Cenadelli Katia Parati Marie-Odile Vidal Alain Vergnet Béatrice Chatain |
| |
| Institution: | 1. Grupo de Investigación en Acuicultura (GIA), IU-ECOAQUA, Universidad de Las Palmas de Gran Canaria, Crta. Taliarte s/n, 35214 Telde, Spain;2. Aquaculture and Fish Nutrition Research Group, School of Biological Sciences, Plymouth University, Plymouth, Devon PL4 8AA, UK;3. Biomar UK, North Shore Road, Grangemouth FK3 8UL, Scotland;1. Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Av. Santa Rosa 11735, La Pintana, Santiago 8820808, Chile;2. School of Agricultural and Veterinarian Sciences, São Paulo State University (UNESP), Jaboticabal, Via de Acesso Prof. Paulo Donato Castellane, 14884-900 Jaboticabal, Brazil;3. Aquainnovo, Cardonal S/N, Puerto Montt, Chile;4. The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Midlothian EH25 9RG, UK;5. Núcleo Milenio INVASAL, Concepción, Chile;1. Nofima AS - Norwegian Institute of Food, Fisheries and Aquaculture Research, PB 210, N-1433 Ås, Norway;2. Norwegian University of life Sciences, PB 5003, N-1433 Ås, Norway;1. SYSAAF, LPGP/INRA, Campus de Beaulieu, 35042 Rennes, France;2. INRA, UR1037, LPGP, SFR Biosit, Campus de Beaulieu, F-35000 Rennes, France;3. LABOGENA, Domaine de Vilvert, F-78350 Jouy-en-Josas, France;4. INRA, UMR1313 Génétique Animale et Biologie Intégrative, F-78350 Jouy-en-Josas, France;5. Ifremer, UMR110 INTREPID, F-34250 Palavas-les-Flots, France;1. SYSAAF, LPGP/INRA, Campus de Beaulieu, 35042 Rennes, France;2. INRA, UR1037, LPGP, SFR Biosit, Campus de Beaulieu, F-35000 Rennes, France;3. LABOGENA, Domaine de Vilvert, F-78350 Jouy-en-Josas, France;4. INRA, UMR1313 Génétique Animale et Biologie Intégrative, F-78350 Jouy-en-Josas, France;5. Ifremer, UMR110 INTREPID, F-34250 Palavas-les-Flots, France |
| |
| Abstract: | Selective breeding of European sea bass (Dicentrarchus labrax) receives a growing interest, as the estimated heritability of growth is medium to high. In this study, we compared the offspring of four groups of sea bass sires, mated with the same wild dams: wild (W), first generation of domestication (D), first generation of mass selection for length (M), first generation of PROSPER-like selection for length (P). The comparison was done both in replicated tanks (separate rearing) and in mixed tanks (mixed rearing) where sire origins were recovered by genotyping of eight microsatellite markers. Weight, length and growth rate were measured from day 238 post-fertilization (69 g mean weight) to day 611 post-fertilization (390 g mean weight). Both in mixed and separate tanks, both selected groups (P, M) were larger than unselected groups (W, D). No difference was seen at any time between W and D, nor between M and P. The selection response estimate on weight was larger in mixed tanks when compared to separate tanks (+ 42% in mixed tanks, + 23% in separate tanks at day 611), yielding realized heritability estimates of 0.60 and 0.34, respectively, and confirming the excellent potential of the species for growth improvement through selective breeding. Both selection response and the amplification effect between mixed and separate tanks decreased as rearing density increased. Our hypothesis is that selection response is magnified by competition in mixed tanks, while sub-optimal rearing conditions lower the observed selection response, more in separate tanks (where selected thus larger fish are at a higher density than unselected ones) than in mixed tanks (where all fish experience the same density effects). |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
