Comparative study of pre-weaning growth and behavior tests at Cebu Cubano crosses with Charolaise and Simmenthal
Abstract
A pre and post weaning study was carried out at “Rescate de Sanguily” Genetic Enterprise. The purpose of this research was to assess the productive behaviour of the different breeds or crossbreeds, as well as, to determine the influence of other non genetic factors on such behaviour. The sample taken consisted on 648 animals born between 1982 and 1996. The features chosen for the study were: birthweight, weaning weight, daily average profit and weaning, final weight, total profit, daily average profit in the test and weight per age. Four lineal models of fixed effects were used for the different factors and stages of the study. The variation causes included in the models for the different stages were: breed or crossbreed, period of birth and weaning or beginning of the test, year of birth and year of the beginning of the test, number of births, age at birth and the covariables: weight at the beginning of the test, and weight at birth, and interaction among some of the factors being studied. There was a greater determination in the weaning period compared to the features at birth whereas the crossbreeds obtained the best pre and post weaning due to the effects of the heterosis and a greater environment resistance and adaptation capacity. The analysis of the differences or tendencies among the periods and years studied, showed the management instability and the irregularities in the resource distribution.
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References
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