FN Archimer Export Format
PT J
TI Cross breeding of different domesticated lines as a simple way for genetic improvement in small aquaculture industries: Heterosis and inbreeding effects on growth and survival rates of the Pacific blue shrimp Penaeus (Litopenaeus) stylirostris
BT 
AF GOYARD, Emmanuel
   GOARANT, Cyrille
   ANSQUER, Dominique
   BRUN, Pierre
   DE DECKER, Sophie
   DUFOUR, Robert
   GALINIE, C
   PEIGNON, Jean-Marie
   PHAM, Dominique
   VOUREY, Elodie
   HARACHE, Yves
   PATROIS, Jacques
AS 1:1;2:1;3:1;4:1;5:1;6:1;7:2;8:1;9:1;10:2;11:1;12:1;
FF 1:PDG-DOP-DCOP-AQNC;2:PDG-DOP-DCOP-AQNC;3:PDG-DOP-DCOP-AQNC;4:PDG-DOP-DCOP-AQNC;5:PDG-DOP-DCN-AGSAE-LGP;6:PDG-DOP-DCOP-AQNC;7:;8:PDG-DOP-DCOP-AQNC;9:PDG-DOP-DCOP-AQNC;10:PDG-DOP-DCOP-AQNC;11:PDG-DP2S;12:PDG-DOP-DCOP-AQNC;
C1 IFREMER, Dept Aquaculture Caledonie, Stn St Vincent, Noumea 98846, New Caledonia.
   Groupement Fermes Aquacoles, Noumea 98845, New Caledonia.
C2 IFREMER, FRANCE
   GROUPEMENT FERMES AQUACOLES, FRANCE
SI SAINT VINCENT
   LA TREMBLADE
   NANTES
SE PDG-DOP-DCOP-AQNC
   PDG-DOP-DCN-AGSAE-LGP
   PDG-DP2S
IN WOS Ifremer jusqu'en 2018
   copubli-france
IF 1.678
TC 34
UR https://archimer.ifremer.fr/doc/2008/publication-4316.pdf
LA English
DT Article
DE ;Vibriosis;Survival;Growth;Penaeus Litopenaeus stylirostris;Shrimp;Cross breeding;Genetic improvement
AB Two populations of the Latin American shrimp Penaeus (Litopenaeus)stylirostris domesticated in Hawaii and in New Caledonia were previously shown to be genetically differentiated and proven highly inbred. In New Caledonia, where different Vibriosis affect shrimp production and antibiotic use is banned in growing ponds, the Hawaiian population was introduced to increase the allelic variability available for local shrimp farmers and start a genetic improvement program. Growth and survival rates of the two pure populations and the two-way F-1-hybrids obtained by breeding Hawaiian animals with New Caledonian animals were assessed in several simple experiments (earthen ponds, floating cages and experimental infection challenges) during two years on two successive generations. Results were very consistent: F-1-hybrids growth rates in earthen ponds were 37% (+/-7% SD) higher than for pure populations. Cage experiments demonstrated no competition between the different populations when reared together or separately in a common environment. The F-1-hybrids also showed better survival rates in all experiments. Combining the results on growth and survival rates leads to the conclusion that biomass production is much higher with F-1-hybrid populations than with pure populations using the same quantity of juveniles stocked: biomass production in ponds was increased 1.4 and 2.3 times on year I and year 2 respectively, and 1.9 times in floating cages. The advantage of growing F-1-hybrids appeared proportionally higher when environmental and sanitary conditions led to poorer survival (34% in year 2 vs. 56% in year 1).   These results are a good example of performance improvement by heterosis effect and/or of performance loss due to inbreeding in the pure populations. This study demonstrates that aquaculture industries which cannot afford large selection programs may benefit from using two different inbred parental stocks to produce F-1-hybrids for each commercial growout. This is notably true when only inbred populations are available, or when introduction of genetic variability from the wild or from other genetic resources represents a zoo-sanitary risk. In our case, the expected increase in L stylirostris production could be around 85% (according to our average results) if producers keep stocking their ponds at their current densities using F-1-hybrids. However, for sustainability reasons, it is advisable to stock F-1-hybrid animals at lower densities, the gain in performance allowing producing the same amount of biomass with less input. (C) 2008 Elsevier B.V. All rights reserved.
PY 2008
PD JUL
SO Aquaculture
SN 0044-8486
PU Elsevier
VL 278
IS 1-4
UT 000257004800009
BP 43
EP 50
DI 10.1016/j.aquaculture.2008.03.018
ID 4316
ER

EF