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dc.contributor.author Weller, Joel Ira en_US
dc.date.accessioned 2012-01-19T20:18:15Z en_US
dc.date.available 2012-01-19T20:18:15Z en_US
dc.date.issued 2006 en_US
dc.identifier.citation Weller, J.I. (2006). Lessons for aquaculture breeding from livestock. The Israeli Journal of Aquaculture - Bamidgeh, 58(4), 257-265. en_US
dc.identifier.issn 0792-156X en_US
dc.identifier.uri http://hdl.handle.net/10524/19184 en_US
dc.description.abstract Investment in breeding is unique because genetic gains are eternal and cumulative. They are never “used up”, and never “wear out”. However, nearly all of the gain is transferred to the national economy. Very little stays with farmers or commercial breeders. Unlike genetic gains, costs are not cumulative. With a profit horizon of 20 years and a discount rate of 0.08, total dis- counted costs will equal total discounted gains if the value of the nominal annual genetic gains is 0.3 of the nominal annual costs. The rate of genetic gain for milk production in dairy cattle has been about 1% per year for the last 20 years. Since the 1950s, rates of genetic gain have increased due to better pedigree information, more traits recorded, more accurate recording, and better statistical methods. From the beginning of modern breeding programs, selection in dairy cattle focused on milk production. From 1985, breeding goals moved towards improving protein yield. In recent years, selection objectives were broadened to include “functional herdlife”, fertil- ity, and health traits. The main reasons behind this shift were quotas and/or price constraints, and increasing concerns associated with the deterioration of the health and fertility of dairy cows. Modern technology complements traditional breeding but does not replace it. To date, nearly all progress in animal breeding has been obtained by traditional trait-based methodology. There is no substitute for accurate data and pedigree recording. en_US
dc.format.extent 9 pages en_US
dc.publisher Israeli Journal of Aquaculture - BAMIGDEH en_US
dc.relation.ispartofseries The Israeli Journal of Aquaculture - Bamidgeh en_US
dc.subject livestock breeding, animal breeding, biotechnology, genetic trends en_US
dc.subject.lcsh Fish culture--Israel--Periodicals. en_US
dc.subject.lcsh Fish culture--Periodicals. en_US
dc.subject.lcsh Aquaculture--Israel--Periodicals. en_US
dc.subject.lcsh Aquaculture--Periodicals. en_US
dc.title Lessons for aquaculture breeding from livestock en_US

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