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Revista Brasileira de Zootecnia

versión On-line ISSN 1806-9290

Resumen

CARTAXO, Felipe Queiroga et al. Quantitative traits of carcass from lambs finished in feedlot system and slaughtered at different body conditions. R. Bras. Zootec. [online]. 2009, vol.38, n.4, pp. 697-704. ISSN 1806-9290.  http://dx.doi.org/10.1590/S1516-35982009000400016.

The objective of this study was to evaluate the effects of the genotypes and body condition on the carcass dressing of lambs finished in feedlot. Twenty-four Santa Inês and 24 ½ Dorper × ½ Santa Inês crossbred lambs averaging 19.8 kg of weight and 103 days old were used in the trial. The adaptation period to the facilities and diet was of 14 days. The animals received complete ration with 30% of maniçoba hay (Manihot pseudoglaziovii) and 70% of concentrate. The experimental design consisted of a completely randomized 2 × 3 factorial design (two genotypes and three corporal conditions) with different number of replicates. No differences between genotypes for the quantitative carcass traits studied were observed, except for the percentage of internal fat, fat thickness in the fat condition and dressing of the leg and rib in the intermediate corporal condition. The effect of the body condition within the genotype increases the internal fat percentage, fat thickness, compactness index of the carcass and weights of the saleable cuts, except for the weight of the neck in Dorper × Santa Inês crossbred lambs.

Palabras llave : body score; Dorper; muscularity; Santa Inês; subcutaneous fat.

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