Survival analysis of piglet pre-weaning mortality

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Abstract

Survival analysis methodology was applied in order to analyse sources of variation of preweaning survival time and to estimate variance components using data from a crossbred piglets population. A frailty sire model was used with the litter effect treated as an additional random source of variation. All the variables considered had a significant effect on survivability: sex, cross-fostering, parity of the nurse-sow and litter size. The variance estimates of sire and litter were closed to 0.08 and 2 respectively and the heritability of pre-weaning survival was 0.03.

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Cecchinato, A., Maretto, F., Zanetti, E., & Carnier, P. (2007). Survival analysis of piglet pre-weaning mortality. In Italian Journal of Animal Science (Vol. 6, pp. 67–69). Avenue Media. https://doi.org/10.4081/ijas.2007.1s.67

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