Estudio del comportamiento en el crecimiento hasta los 98 dias de edad de cabritos de la raza Negra Serrana.
1992
Gonzalez M Antonio | Herrera G Mariano | Delgado B Juan Vicente | Rodero F Jose Maria
The Negra Serrana or Castiza is a cyrtoid, sublongiline and hypermetric meat goat breed, located in Jaen, Ciudad Real and Albacete provinces of Spain. Their population is around 22.000 individuals, of whose productive status few references exist. In the present paper the growth of 127 kids from birth until 98 days old is characterized, by means of two week control of their body weight. Moreover, the effects on the breeding system, sex, birth type and birth station were estimated. A preliminary study on the most efficient mathematical function that explains this growth behaviour was developed. We found that the lineal function shows the minor sum of residual squares with regards to the exponential and potential curves. It has obtained a general racial lineal function described by: weight = 4.2930 * 0.1670 c days; but we also describe specific functions for each level within the controlled factors. Statistical comparisons between these levels are established using a homogeneity test for the regression coefficient and the intercept points. With these tests, there resulted the detection of significative differences between sexes, birth type, birth station (P < 0.01) and breeding system (P < 0.05). In the end, the growth behaviour of these breeds was compared with others from several breeds referred to in the literature, as Malabari, Saanen, Murciano-Granadina and Verata, by means of adjustment test, obtaining high significative differences (P < 0.01), except in the verata's females case, where adjustment rest result only are significative until P < 0.05.
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