Economic analysis of goat selection schemes
2000
Fernández, R. | Serradilla, J.M. (Universidad de Córdoba (Spain). Escuela Técnica Superior de Ingenieros Agrónomos y de Montes, Dept. de Producción Animal)
An economic evaluation of a selection programme for the main autochthonous Spanish dairy goat breeds, Murciano-Granadina and Malagueña, has been carried out. Different annual genetic progresses obtained through deterministic simulations of different selection schemes have been considered. These progresses ranged from 5.62 to 15.84 k for milk yield in 240 days, from 0.25 to 0.53 g per k for protein content and from 0.30 to 0.35 g per k for fat content. Various rates of diffusion of the breeding progress from the selected nucleus to the rest of the herds were also taken into account. The economic evaluation approach used is based on the Marshallian welfare theory. It involves computing the yearly variation of the Marshallian economic surplus induced by supply and demand shifts produced by the increments of milk yield and protein and fat contents due to selection programmes. These values, together with the cost of implementing selection programmes, were used to estimate the social internal rate of return (SIRR) of public investments. Results show that the SIRR is independent on the mode of payment of milk to producers (with a bonus only for fat or with a bonus for fat and protein) and it depends heavily on the diffusion rates of genetic improvement from the selection nuclei to the rest of the herds in the breed. In general, selection schemes based on AI have higher SIRR than those based on natural service, the latter being frequently negative or close to zero
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Эту запись предоставил Instituto Agronómico Mediterráneo de Zaragoza