Individual body weights of 486 Atlantic halibut were obtained for 4 stages of the growout period under commercial conditions. Fish were communally reared from the egg stage and transferred to two test environments after PIT tagging at \textasciitilde500 g. Pedigree was assigned using seven microsatellites with 94% success. Estimates of heritability with 95% confidence intervals were determined from likelihood profiles after fitting mixed linear models. Pedigree analysis revealed that the effective number of sires and dams were only 14% and 25% of the total numbers respectively. Heritability estimates and confidence intervals were: 0.08(0-0.44), 0.28(0.12-0.53), 0.39(0.17-0.72) and 0.39(0.17-0.72) for weights at 3 months, 1, 2 and 3 years respectively. No significant differences between sire and dam variances were observed. The results indicate moderate genetic variance for increasing body weight in the halibut.

A. S Frank-Lawale, J. B Taggart, B. J McAndrew, D. J Penman, N. Jordan, John A Woolliams

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume , , 09.04, 2006
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