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Ciência Animal Brasileira

versão On-line ISSN 1809-6891

Resumo

RODRIGUES, Luciana et al. Evaluation of recombinant bovine somatotropin (rbST) on non-carcass components of goat kids of three genotypes. Ciênc. anim. bras. [online]. 2013, vol.14, n.2, pp.143-150. ISSN 1809-6891.  https://doi.org/10.5216/cab.v14i2.8984.

This study was developed with the aim of evaluating recombinant bovine somatotropin (rbST) on non-carcass components of goat kids of three genotypes. It was used 23 male goat kids of three genotypes, being 8 Alpine, 4 ½ Boer + ½ Alpine (½ BA) and 11 ¾ Boer + ¼Alpine (¾ BA), from which 12 received rbST e 11 control. The growth hormone used was the recombinant bovine somatotropin (rbST) and animals of treatment 1 received the hormone in the amount of 0.3 mg/kg live weight, from 45 days, adjusted in intervals of 14 days. Animals of treatment 2 (control) received saline solution in the same dosage and interval. The ½ BA goats presented a higher proportion of external non-carcass components (head, feet and skin) in relation to Alpine goats. Regarding the vital organs, such as lungs, kidneys and spleen, and the non-carcass components 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.

Palavras-chave : carcass; goats; growth hormone; live weight components.

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