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Optimising between and within family selection for harvest weight in prawns with restricted harvest size.

Macbeth, M. (2007) Optimising between and within family selection for harvest weight in prawns with restricted harvest size. In: Genetic improvement: making it happen. Proceedings of the Seventeenth Conference of the Association for the Advancement of Animal Breeding and Genetics. (AAAGB), 23rd - 26th September 2007, Armidale, New South Wales, Australia.

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Organisation URL: http://www.livestocklibrary.com.au/AdvSearch.htm
Organisation URL: http://www.aaabg.org/aaabg/

Abstract

Manual grading of prawns restricts the number that can be harvested. A restricted harvest size places a limit on the opposing within family and between family sources of selection pressure. A simulation study with inbreeding constrained at 0.5% per generation, a harvest size of 2000, heritability of 0.3, common family environmental effect of 0.1, indicates that maximum response to selection could be achieved with as few as 40 families. Increasing the number of families above 80 may reduce total selection response. It is important to be aware that increasing the number of families may not always yield a greater genetic response.

Item Type:Conference or Workshop Item (Paper)
Corporate Creators:DEEDI, QPIF
Additional Information:© Association for the Advancement of Animal Breeding and Genetics (AAABG).
Keywords:Environmental impact; heritability; inbreeding; liveweight; prawns; selection; yields.
Subjects:Aquaculture and Fisheries > Aquaculture
Agriculture > Agriculture (General) > Agricultural economics
Deposited On:16 Dec 2010 07:00
Last Modified:16 Dec 2010 07:00

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