Conference paper
Performance and survival of three red tilapia strains (Oreochromis spp) in pond environment in Kedah State, Malaysia
Proceedings of the International Symposium on Tilapia in Aquaculture, pp.199-211
International Symposium on Tilapia in Aquaculture (ISTA), 8th (Cairo, Egypt, 12-Oct-2008 - 14-Oct-2008)
2008
Abstract
Growth performance (body weight, standard length, body width and depth) and survival of three red tilapia (Oreochromis spp) strains from Malaysia, Taiwan and Thailand were evaluated using 2,867 records collected on individually tagged fish after a period of three-months of communal rearing in an earthen pond. The statistical model used to analyze the data included strain, sex and their two-way interaction as fixed effects and age from stocking to harvest and initial weight as linear covariates. The effect of strain was highly significant for all body traits (P less than 0.001). The Malaysian strain had the fastest growth rate, whereas the lowest performing strain was that from Thailand. The growth performance of the Taiwanese strain was intermediate. Across strains, body measurements of red tilapia females were significantly (P less than 0.001) smaller than those of males. The strain by sex interaction was statistically significant (P less than 0.05 to 0.001). We also analyzed survival rate of the fish from stocking to harvest, using a generalized non-linear model. Survival was considered as binary trait, and the model assumed that the data followed a binomial distribution, with a logit link function (p^ = ex /(1 +ex)). In contrast to the results for body traits, survival rate was poorest for the Malaysian strain (66.4%). The difference in survival rate between Taiwan and Thai strains (78.5 vs. 80.6%) was not statistically significant (P more than 0.05). Our results suggest that there are genetic differences in growth performance and survival among red tilapia strains from Malaysia, Taiwan, and Thailand. They are thus being included in a complete diallel cross to further examine the additive and non-additive genetic performance of the strains before forming the base population for future genetic selection. In this paper we present an outline and key activities of the planned genetic improvement program for red tilapia in Malaysia.
Details
- Title
- Performance and survival of three red tilapia strains (Oreochromis spp) in pond environment in Kedah State, Malaysia
- Authors
- A Hamzah (Author) - National Prawn Fry Production and Research Center, MalaysiaNguyen Hong Nguyen (Author) - WorldFish Center, MalaysiaR W Ponzoni (Author) - WorldFish Center, MalaysiaN Kamaruzzaman (Author) - WorldFish Center, MalaysiaB Subha (Author) - Freshwater Fisheries Research Institute, Malaysia
- Publication details
- Proceedings of the International Symposium on Tilapia in Aquaculture, pp.199-211
- Conference details
- International Symposium on Tilapia in Aquaculture (ISTA), 8th (Cairo, Egypt, 12-Oct-2008 - 14-Oct-2008)
- Organisation Unit
- Centre for Bioinnovation; School of Science and Engineering - Legacy; University of the Sunshine Coast, Queensland; School of Science, Technology and Engineering
- Language
- English
- Record Identifier
- 99450381702621
- Output Type
- Conference paper
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