This study was carried out in order to evaluate the live weight at slaughter, carcass weights, cooling weight losses and carcass yield, for 18 Corriedale and 18 Ile de France x Cor riedale lambs. They were weaned at 60 days of age, with 10 to 12kg of live weight, and were reared in feedlot system. Both groups were fed with a 15% CP and 70% TND diet, until to reach 30-32kg of live weight when they were slaughtered. The results showed similarity between genotypes, although all carcasses presented the standard wished by the regional market. It was observed a 4% weight loss from the farm to the slaughterhouse. The head, pelt, blood and liver, represented 20.9% of the mean live weight at slaughter and affected the carcass yield. The similarity between groups does not become invalid the utization of crossbred lambs in the same conditions, because the global efficiency of the production system was not evalueted.
carcass; meat production; lamb meat; sheep
