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Fatores que influenciam o crescimento de cabritos das raças Alpina, Saanen e cruzados, em aleitamento artificial
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Advisor(s)
Abstract(s)
Analisaram-se os pesos de 802 cabritos das raças Alpina, Saanen e cruzados ½Alpina ½Saanen, aleitados
artificialmente, com o objetivo de avaliar a influência da raça no peso e crescimento dos animais. Os cabritos
foram pesados ao nascimento e, posteriormente, semanalmente, tendo-se calculado os pesos ajustados aos 15,
30, 45 e 60 dias e o GMD do nascimento aos 45, 60 e 45-60 dias. O modelo de análise incluiu os efeitos da raça,
tipo de parto, sexo, época de nascimento e idade da cabra ao parto. Todos os fatores considerados influenciaram
os pesos ao nascimento, 15 e 30 dias (p<0,01), exceto o efeito da raça aos 30 dias, cujo efeito não foi
significativo. Registou-se a influência da raça e da época de nascimento aos 45 dias, e do tipo de parto, aos 60
dias. Registaram-se pesos superiores para a raça Alpina, relativamente à Saanen (p<0,05), ao nascimento, 15, 45
e 60 dias, bem como no GMD 0-60 e 45-60 dias. Os animais cruzados apresentaram valores intermédios, mas
verificou-se ainda uma superioridade da raça Alpina no peso ao nascimento. Os machos registaram pesos
superiores às fêmeas, ao nascimento, 15 e 30 dias (p<0,01). Registaram-se pesos superiores nos partos simples,
relativamente aos duplos, e ambos superiores aos triplos, ao nascimento, 15 e 30 dias (p<0,05). O tipo de parto
não influenciou significativamente o GMD 60 dias. A idade da cabra teve um efeito quadrático no peso às
diferentes idades, verificando-se pesos mais elevados em cabritos nascidos de cabras com cerca de 54 meses.
The weights of 802 Alpine, Saanen and crossbred (½ Alpine x ½ Saanen), artificially reared kids were analysed in order to evaluate breed effects on weight and growth. Kids were weighed at birth and in weekly intervals. Adjusted weights at 15, 30, 45 and 60 days of age, and 0-45, 45-60 and 0-60 day average daily gains (ADG) were calculated. The analysis model included breed, type of kidding, sex, season of birth and dam age at parturition effects. Birth and 15- and 30-day weights were significantly (p<0.01) influenced by all factors except breed for 30 day weight. 45 day weight was influenced by breed and season of birth. 60 day weight was influenced by type of kidding. Alpine, relative to Saanen kids, had higher birth and 15-, 45- and 60-day weights (p<0,05), and higher 0-60 and 45-60 day ADG. Crossbred kids had intermediate values, their birthweight being significantly lower than that of Alpine animals. Male kids’ birth and 15- and 30-day weights were significantly higher (p<0,01) than those of females. Single born kids’ birth and 15- and 30-day weights were higher than those of twin born kids, and these, in turn, were higher than those of triplets. Kidding type did not significantly affect 60 day ADG. Age of dam had a quadratic effect on weight at different ages. Higher weights were observed in kids from dam around 54 months old.
The weights of 802 Alpine, Saanen and crossbred (½ Alpine x ½ Saanen), artificially reared kids were analysed in order to evaluate breed effects on weight and growth. Kids were weighed at birth and in weekly intervals. Adjusted weights at 15, 30, 45 and 60 days of age, and 0-45, 45-60 and 0-60 day average daily gains (ADG) were calculated. The analysis model included breed, type of kidding, sex, season of birth and dam age at parturition effects. Birth and 15- and 30-day weights were significantly (p<0.01) influenced by all factors except breed for 30 day weight. 45 day weight was influenced by breed and season of birth. 60 day weight was influenced by type of kidding. Alpine, relative to Saanen kids, had higher birth and 15-, 45- and 60-day weights (p<0,05), and higher 0-60 and 45-60 day ADG. Crossbred kids had intermediate values, their birthweight being significantly lower than that of Alpine animals. Male kids’ birth and 15- and 30-day weights were significantly higher (p<0,01) than those of females. Single born kids’ birth and 15- and 30-day weights were higher than those of twin born kids, and these, in turn, were higher than those of triplets. Kidding type did not significantly affect 60 day ADG. Age of dam had a quadratic effect on weight at different ages. Higher weights were observed in kids from dam around 54 months old.
Description
Keywords
Caprino Saanen Alpina Crescimento
Citation
Pardal, P., Tavares, D., Pascoal, R. & Carolino N. (2013). Fatores que influenciam o crescimento de cabritos das raças Alpina, Saanen e cruzados, em aleitamento artificial. Actas Iberoamericanas de Conservación Animal (3): 155-162