Abstract
Sow longevity plays an important role in economically efficient piglet production. Improving sow longevity results increase in the productivity and profitability of a sow herd. Longevity is a complex trait with many factors that can contribute to a sow having a long and productive life. Not only the sow’s genetics, but also nutrition, environment and the management policies are important. In addition, the removal of non-productive sows along with the introduction of replacement gilts is an essential part of maintaining herd productivity at a constantly high level. The objective of this paper was to summarize the current knowledge about the sow longevity and lifetime performance values, as well as, discusses the survival analysis methods for sow longevity traits. This method can estimate the hazard rate indicating proportional risk of sows being culled at any given time, in addition, it is able to investigate the effects of different factors on longevity. Identifying factors that influence the longevity could assist many commercial pig producers in becoming more efficient.
Highlights
Longevity of adult females is a trait with a significant effect on swine farm profitability (Hoge and Bate, 2011) and can be considered as an important indicator of animal welfare (Fernandez de Sevilla et al, 2008)
The aim of this study was to provide a review of current scientific knowledge of factors influencing sow longevity and lifetime reproductive performance based on methodology of survival analysis
This review provided an understanding of the factors influencing sow longevity
Summary
Sow longevity plays an important role in economically efficient piglet production. Improving sow longevity results increase in the productivity and profitability of a sow herd. The objective of this paper was to summarize the current knowledge about the sow longevity and lifetime performance values, as well as, discusses the survival analysis methods for sow longevity traits. This method can estimate the hazard rate indicating proportional risk of sows being culled at any given time, in addition, it is able to investigate the effects of different factors on longevity. A befolyásoló tényezők között nemcsak a genetika, hanem a takarmányozás, a tartáskörülmények valamint a menedzsment munkája is döntő szerepet játszik. Jelen tanulmány célja a kocák élettartamára és életteljesítmény mutatóira vonatkozó aktuális ismeretek összefoglalása, valamint a túlélés elemzés, mint élettartam vizsgálatára alkalmas módszer jelentőségének ismertetése. E tényezők alaposabb ismerete segítséget nyújthat a termelők számára hatékonyabbá válásukban
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