Genetic (co)variation in harvest body weight and survival in Penaeus (Litopenaeus) vannamei under standard commercial conditions |
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| Institution: | 1. Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Santa Rosa 11735, La Pintana, Santiago, Chile;2. Aquainnovo S.A., Talca 60, Puerto Montt, Chile;3. Facultad de Ciencias Agronómicas, Universidad de Chile, Santa Rosa 11315, La Pintana, Santiago, Chile;4. Genus plc, Hendersonville, TN 37075, USA;1. Tropical Futures Institute, James Cook University, Singapore;2. Centre for Sustainable Tropical Fisheries and Aquaculture, James Cook University, Townsville, Queensland, Australia;3. Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Hong Kong, SAR, China;4. Coral Coast Barramundi, Bowen, Queensland, Australia;5. Sanford Ltd, Auckland, New Zealand;6. Spring Creek Barramundi, Townsville, Queensland, Australia |
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| Abstract: | In 1997, CENIACUA (Centro de Investigaciones para la Acuicultura en Colombia) in collaboration with AKVAFORSK (Institute of Aquaculture Research, Norway) initiated a family-based selection scheme in Penaeus (Litopenaeus) vannamei to improve growth rate and survival in ponds and tanks. This paper reports results from a series of tests in which a total of 430 full-sib families (representing 204 paternal half-sib families) were tested for harvest weight and survival in standard commercial and intensive growing environments. The families originated from two selected lines. The estimates of heritability (h2±S.E.) for harvest weight for the two lines were 0.24±0.05 and 0.17±0.04, and the corresponding estimates for survival in pond/tanks were 0.04±0.02 and 0.10±0.02. Results showed a favorable correlation between the estimated mean full-sib family breeding values for harvest weight and pond/tank survival (0.42 in line 1 and 0.40 in line 2) indicating that selecting for growth will cause a positive correlated response in overall survival. The genetic correlations between body weights and pond/tank survival in different grow-out environments were high, demonstrating low genotype by farm interaction (GXE) for both traits. |
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