Effect of frame size on performance and carcass traits of Santa Inês lambs finished in a feedlot

AUTOR(ES)

Souza Júnior, Edmilson Lúcio de, Sousa, Wandrick Hauss de, Pimenta Filho, Edgard Cavalcanti, Gonzaga Neto, Severino, Cartaxo, Felipe Queiroga, Cezar, Marcílio Fontes, Cunha, Maria das Graças Gomes, Pereira Filho, José Morais

FONTE

R. Bras. Zootec.

DATA DE PUBLICAÇÃO

2013-04

RESUMO

The objective of this study was to evaluate the performance, qualitative, morphometric and quantitative carcass traits of Santa Inês lambs of different frame sizes finished in a feedlot. Twenty 120-day-old intact lambs with a 25.0±3.1 kg average body weight at the beginning of the experiment were used. Lambs received a diet containing 17% crude protein and 2.70 Mcal/kg dry matter. Frame size influenced performance and tissue composition in the carcasses of the lambs. Lambs with large frame sizes showed better carcass conformation compared with those of medium-sized frames. Frame size was found to have a significant effect on rump perimeter. Large-framed lambs showed higher compactness on the carcass index and carcass dressing area compared with medium-framed lambs. The cuts of large-framed lambs weighed more than those of mediumframed lambs. However, no significant differences were found in dressing.

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