Desempenho e características de carcaças de cordeiros “pantaneiros” abatidos em diferentes pesos corporais

Abstract

Objective was to evaluate the performance and carcass characteristics of lambs "Pantaneiro" feedlot diet with 80% concentrate and 20% roughage and slaughtered at different slaughter weight (15, 20, 25, 30 and 35 kg). They were used 45 lambs "Pantaneiro", male, uncastrated, distributed in a randomized design with five treatments and nine repetitions. . When they reach the weight established by the treatments, the animals were slaughtered and the carcasses were cooled for 24 hours for further evaluation and division into cuts. The left half carcass was divided into seven commercial courts - neck, shoulder, rib fixed, floating rib, loin, leg and down. The shoulder cuts and leg were dissected to estimate the tissue composition. The data were submitted to regression analysis. Was no effect of body weight on carcass characteristics evaluated. In the performance there was a decrease in the efficiency ratios. In housing increased by perirenal fat (R2 = 0.76) and non carcass components (R2 = 0.95) and tissue composition observed lot of fat in the palette (R2 = 0.68) and ham (R2 = 0.63 It is concluded that body weight at slaughter affected the performance, carcass characteristics and body and tissue composition in lambs "Pantaneiro".