FN Archimer Export Format PT J TI Summer mortality of hatchery-produced Pacific oyster spat (Crassostrea gigas). II. Response to selection for survival and its influence on growth and yield BT AF DEGREMONT, Lionel BEDIER, Edouard BOUDRY, Pierre AS 1:1;2:2;3:3; FF 1:PDG-DOP-DCN-AGSAE-LGP;2:PDG-DOP-LER-LERMPL;3:PDG-DOP-DCB-PFOM-PI; C1 IFREMER, Lab Genet & Pathol, F-17390 La Tremblade, France. IFREMER, Lab Environm Ressources Morbihan Pays Loire, F-56470 La Trinite, France. IFREMER, UMR Physiol & Ecophysiol Mollusques Marins M100, Plouzane, France. C2 IFREMER, FRANCE IFREMER, FRANCE IFREMER, FRANCE SI LA TREMBLADE LA TRINITE BREST SE PDG-DOP-DCN-AGSAE-LGP PDG-DOP-LER-LERMPL PDG-DOP-DCB-PFOM-PI IN WOS Ifremer jusqu'en 2018 IF 2.044 TC 93 UR https://archimer.ifremer.fr/doc/2009/publication-6950.pdf LA English DT Article DE ;Crassostrea gigas;Heritability;Juveniles;Summer mortality;Survival;Growth AB Response to divergent selection for "high" and "low" survival during the summer period, from July to October, was investigated in juvenile (six-month-old) Pacific oysters, Crassostrea gigas, by producing two sets of progenies in 2002 (Generation 2) and three sets of progenies in 2003 (Generation 3). A strict between-family approach was used and resistance of these selected progenies to summer mortality was assessed in three sites along French coasts, to determine their response to selection and estimate realized heritability of the trait. A significant difference in survival was observed between the "high" and "low" selected groups at all sites for all sets of progenies, indicating a significant genetic component. High realized heritabilities for survival obtained from Generation 2 oysters, ranging from 0.61 ± 0.08 to 0.98 ± 0.15, were in line with previous results from the first generation. Finally, Generation 3 realized heritability, ranging from 0.55 ± 0.18 to 0.81 ± 0.13, supported results from Generation 2. Our results demonstrate that selective breeding to improve survival during the first summer can be successfully implemented and should lead to rapid gains. Overall, selection on survival did not have any impact on growth, although it did have one on yield. PY 2010 PD FEB SO Aquaculture SN 0044-8486 PU Elsevier Science Bv VL 299 IS 1-4 UT 000275033500004 BP 21 EP 29 DI 10.1016/j.aquaculture.2009.11.017 ID 6950 ER EF