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

Azhar Hamzah; Wagdy Mekkawy; Hooi Ling Khaw; Nguyen Hong Nguyen; Hoong Yip Yee; Khairul Rizal Abu Bakar; Siti Azizah Mohd Nor; Raul W Ponzoni

doi:10.1111/are.12859

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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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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

Azhar Hamzah, Wagdy Mekkawy, Hooi Ling Khaw, Nguyen Hong Nguyen, Hoong Yip Yee, Khairul Rizal Abu Bakar, Siti Azizah Mohd Nor and Raul W Ponzoni

Aquaculture Research, Vol.48(1), pp.47-55

2017

DOI: https://doi.org/10.1111/are.12859

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Abstract

survival

GIFT

heritability

genetic correlation

selection response

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.

Details

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
Authors: Azhar Hamzah (Author) - University Science Malaysia, Malaysia
Wagdy Mekkawy (Author) - Ain Shams University, Egypt
Hooi Ling Khaw (Author) - World Fish, Malaysia
Nguyen Hong Nguyen (Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and Engineering
Hoong Yip Yee (Author) - World Fish, Malaysia
Khairul Rizal Abu Bakar (Author) - World Fish, Malaysia
Siti Azizah Mohd Nor (Author) - University Science Malaysia, Malaysia
Raul W Ponzoni (Author) - Universidad de la Republica, Uruguay
Publication details: Aquaculture Research, Vol.48(1), pp.47-55
Publisher: Wiley-Blackwell Publishing Ltd.
Date published: 2017
DOI: 10.1111/are.12859
ISSN: 1355-557X
Organisation Unit: School of Science and Engineering - Legacy; University of the Sunshine Coast, Queensland; School of Science, Technology and Engineering; Centre for Bioinnovation
Language: English
Record Identifier: 99449310302621
Output Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Web Of Science research areas: Fisheries