Abstract
This study was developed with the aim of evaluatingrecombinant bovine somatotropin (rbST) on non-carcasscomponents of goat kids of three genotypes. It was used23 male goat kids of three genotypes, being 8 Alpine, 4 ½Boer + ½ Alpine (½ BA) and 11 ¾ Boer + ¼Alpine (¾BA), from which 12 received rbST e 11 control. Thegrowth hormone used was the recombinant bovinesomatotropin (rbST) and animals of treatment 1 receivedthe hormone in the amount of 0.3 mg/kg live weight, from 45 days, adjusted in intervals of 14 days. Animals oftreatment 2 (control) received saline solution in the samedosage and interval. The ½ BA goats presented a higherproportion of external non-carcass components (head, feetand skin) in relation to Alpine goats. Regarding the vitalorgans, such as lungs, kidneys and spleen, and the noncarcasscomponents blood, internal fat and perinephric fat,Alpine goats presented higher values than ¾ BA goats.The administration of recombinant bovine somatotropin (rbST) did not produce effect on proportions and weight of non-carcass components. Proportions and weight of non-carcass components varied in function of genotypes, although animals were slaughtered at similar live weight. KEYWORDS: carcass; goats; growth hormone; live weight components.
Highlights
Resultado semelhante aos de CAMERON et al (2001), que observaram maior proporção de cabeça em animais Boer x Spanish e Boer x Angorá em relação aos da raça
A proporção total dos não-componentes externos da carcaça em relação ao peso do corpo vazio (PCV) foi influenciada pelo genótipo (Tabela 3)
Australian Journal of Agricultural Research, v.40, p.195-206, 1989
Summary
LUCIANA RODRIGUES1, HERALDO CÉSAR GONÇALVES2, BRENDA BATISTA LEMOS MEDEIROS3, JAKILANE JACQUE LEAL MENEZES4, SIRLEI APARECIDA MAESTÁ5. Desenvolveu-se o presente estudo com o objetivo de avaliar a somatotropina bovina recombinante (rbST) nos não-componentes da carcaça de cabritos de três genótipos. O hormônio de crescimento utilizado foi a somatotropina recombinante bovina (rbST) e os animais do tratamento 1 receberam o hormônio na quantidade de 0,3 mg/kg de peso vivo, a partir dos 45 dias, ajustada em intervalos de 14 dias. Os animais 1⁄2 BA apresentaram uma maior proporção dos não-componentes externos (cabeça, patas e pele) em relação aos da raça Alpina. Em relação aos órgãos vitais, como pulmão, rins e baço, e aos não-componentes sangue, gordura interna e gordura perirenal, os animais da raça Alpina apresentaram maiores valores em relação aos 3⁄4 BA. A administração da somatotropina bovina recombinante (rbST) não produziu efeito nos não-componentes da carcaça. EVALUATION OF RECOMBINANT BOVINE SOMATOTROPIN (rbST) ON NONCARCASS COMPONENTS OF GOAT KIDS OF THREE GENOTYPES
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