Effects of placental efficiency on goat performance
DOI:
https://doi.org/10.35699/2447-6218.2022.40462Keywords:
Number of kids, Nutrition, Weaning weightAbstract
The objective of this study was to verify the effects of placental efficiency in goats and to characterize its influence on the survival and performance of goats until the weaning phase. For this, a multiple regression model was created to identify which characteristics influence, and in what proportion, the weight of goats at weaning. In order to verify which characteristics affected the kids’ chance of survival until weaning, a generalized linear model was elaborated. To be included in the models, the variables needed to be significant at the 5% probability level (P-value < 0.05). The statistically significant coefficients maintained in the final model to determine the weaning weight of the offspring were placental efficiency, weight of the mother at parturition and number of offspring. Placental efficiency increased the weaning weight of goats by 0.0582, while an extra kilo at calving of sows caused an increase of 0.2310 kg in the same variable. For each extra kid born per birth, the weaning weight was increased by 7.0066 kg. Placental efficiency
decreased the risk of offspring survival by 0.01%. On the other hand, the weight of the sow at calving and the number of offspring born increased by 0.44% and by 71.89% the chance of survival of the kids until weaning. It is indicated that, in order to obtain greater productivity in the system, the nutritional requirements of the animals in all their physiological stages are met, since inadequate nutrition can limit the performance of the animals.
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