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Genetic parameters for survival during the grow-out period in the GIFT strain of Nile tilapia (Oreochromis niloticus) and correlated response to selection for harvest weight

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Title Genetic parameters for survival during the grow-out period in the GIFT strain of Nile tilapia (Oreochromis niloticus) and correlated response to selection for harvest weight
 
Creator Hamzah, A.
Mekkawy, Wagdy
Hooi Ling Khaw
Nguyen Hong Nguyen
Hoong Yip Yee
Abu Bakar, K.R.
Nor, S.A.M.
Ponzoni, R.W.
 
Subject fishes
research
genetic correlation
 
Description The aims of this study were the estimation of genetic parameters for survival rate from tagging until harvest and the evaluation of the correlated response in survival rate to selection for harvest weight in the genetically improved farmed tilapia (GIFT) strain. The heritability for survival rate was low (0.038), and so was its genetic correlation with harvest weight (0.065), suggesting that selecting for the latter trait would have had no effect on survival. The calculation of the probability of survival by spawning season and line, fitting a model that included the random effects of individual animal and common environment, confirmed this prediction. There were very small and variable between line differences in the probability of survival, which generally favoured the selection line. We conclude that the focus of the GIFT programme on improving harvest weight was not detrimental to the survival of the fish during the grow-out phase.
 
Date 2017-01
2016-03-10T14:53:09Z
2016-03-10T14:53:09Z
 
Type Journal Article
 
Identifier Hamzah, A., Mekkawy, W., Hooi Ling Khaw, Nguyen Hong Nguyen, Hoong Yip Yee, Abu Bakar, K.R., Nor, S.A.M. and Ponzoni, R.W. 2015. Genetic parameters for survival during the grow-out period in the GIFT strain of Nile tilapia (Oreochromis niloticus) and correlated response to selection for harvest weight. Aquaculture Research
1365-2109
https://hdl.handle.net/10568/72554
https://doi.org/10.1111/are.12859
 
Language en
 
Rights Copyrighted; all rights reserved
Open Access
 
Publisher Wiley
 
Source Aquaculture Research