This experiment was carried out to evaluate the effects of sex(males x females) and four slaughter weights (28, 32, 36 and 40 kg) on the perfomance, carcass traits and economic results from crossbred lambs, finished in feedlot. Fourty ½ Ile de France x ½ Corriedale lambs (20 males and 20 females), were weaned at 60 days of age and were full fed a diet with 16.46% CP and 67.63% TDN. They were divided in four male groups (G1M, G2M, G3M and G4M), slaughtered respectively with the mentioned weights; and, in the same way, four female groups (G1F, G2F, G3F and G4F). There was sex effect on average daily weight gain, with advantage of the males. There was slaughter weigth and sex effects on hot carcass weight and cool carcass weight; the females surpassed the males in G3 and G4 for cool carcass weight. The commercial and biological yields were higher for the females from G3 and G4. All the groups were similar for meat pH, which described a standard curve. The economic evaluation showed that G1M had the best net income. Among the female groups, G1F was the best, detaching negative net incomes for G3F and G4F.
lamb meat; lamb production; sheep; sheep carcass
