FN Archimer Export Format
PT J
TI Can individual feed conversion ratio at commercial size be predicted from juvenile performance in individually reared Nile tilapia Oreochromis niloticus?
BT 
AF Rodde, Charles
   Chatain, Beatrice
   Vandeputte, Marc
   QUOC TRINH, Trong
   Benzie, John A.H.
   de Verdal, Hugues
AS 1:1,2,3,4;2:4;3:5;4:3;5:3,6;6:2;
FF 1:;2:PDG-RBE-MARBEC-LAAAS;3:;4:;5:;6:;
C1 CIRAD, UMR ISEM, F-34398 Montpellier, France
   ISEM, Univ. Montpellier, CNRS, EPHE, IRD, Montpellier, France
   Worldfish, Jalan Batu Maung, Bayan Lepas, 11960 Penang, Malaysia
   MARBEC, Univ. Montpellier, CNRS, Ifremer, IRD, 34250 Palavas-les-Flots, France
   Université Paris-Saclay, INRAE, AgroParisTech, GABI, 78350 Jouy-en-Josas, France
   School of Biological, Earth and Environmental Sciences, University College Cork, Cork, Ireland
C2 CIRAD, FRANCE
   UNIV MONTPELLIER, FRANCE
   WORLDFISH, MALAYSIA
   IFREMER, FRANCE
   INRAE, FRANCE
   UNIV COLL CORK (UCC), IRELAND
SI PALAVAS
SE PDG-RBE-MARBEC-LAAAS
UM MARBEC
IN WOS Ifremer UMR
   DOAJ
   copubli-france
   copubli-p187
   copubli-europe
   copubli-univ-france
   copubli-int-hors-europe
   copubli-sud
IF 3.216
TC 10
UR https://archimer.ifremer.fr/doc/00630/74175/73757.pdf
   https://archimer.ifremer.fr/doc/00630/74175/73758.pdf
   https://archimer.ifremer.fr/doc/00630/74175/73759.pdf
LA English
DT Article
DE ;Feed efficiency;GIFT tilapia;Individual rearing;Selective breeding
AB Feed conversion ratio (FCR), the ratio between feed intake and body weight gain, is of major interest for improving aquaculture sustainability through reduced feed costs and environmental impacts. Demonstrating whether FCR measured in juvenile fish is an accurate predictor of their performance during the whole rearing period is critical to developing genetic improvement programs for this trait. This is especially true for estimates obtained in individually reared fish, for which this has high implications regarding the size of the necessary rearing structures. We obtained individual FCR from 30 male Nile tilapia Oreochromis niloticus from the GIFT strain individually reared in a recirculating system, from 36 to 260 g mean weight. They were fed twice a day and uneaten pellets were counted every day to determine the feed intake of each fish. Individual growth was monitored every week. Feed conversion ratio was estimated over two-week periods and over the whole rearing period (210 days). Phenotypic correlations between the two-week FCRs and global FCR estimations were mostly significant (ranged from 0.38 to 0.64). A significant phenotypic correlation between growth and FCR was also found: faster-growing fish had a better (lower) FCR. Individual breeding values for global FCR were estimated using FCR phenotypes from the present study and previously published heritabilities for FCR in Nile tilapia. Potential estimated genetic gain for global FCR was 2.2% per generation with 50% selection intensity. When selecting fish on their FCR from only a two-week period, approximately 50% of the reference genetic gain could be obtained with the same selection intensity. FCR measured during a two-week period at juvenile stage could be a moderately accurate approximation of the whole rearing period FCR, and could be used as a lower cost criterion to select for FCR in future genetic improvement programs using individual rearing of fish. 
PY 2020
PD JUN
SO Aquaculture Reports
SN 2352-5134
PU Elsevier BV
VL 17
UT 000544614500012
DI 10.1016/j.aqrep.2020.100349
ID 74175
ER

EF