Optimising between and within family selection for harvest weight in prawns with restricted harvest size.Export / Share 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. Full text not currently attached. Access may be available via the Publisher's website or OpenAccess link. Organisation URL: http://www.livestocklibrary.com.au/AdvSearch.htm AbstractManual 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.
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