Longevity in South African Afrikaner cows as assessed through survival analysis
Allison M. Bot Steffl,
Michael D. MacNeil,
Michiel M. Scholtz
et al.
Abstract:The Afrikaner breed of cattle is indigenous to South Africa and, due to their hardiness, was once the most popular breed amongst South African farmers, although in recent years their numbers have decreased. The goal of this study was to assess factors affecting length of productive life, defined as the interval between production of the first and last calf, in Afrikaner cattle using survival analysis. The data spanned 40 years with an observed measure of length of life for 29,379 cows from 374 herds. Relative … Show more
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