This study aimed to compare and quantify carcass yield of male and female lambs of the following breeds: Rasa Aragonesa, Ojinegra de Teruel and Roya Bilbilitana. Animals were slaughtered, one group at 63-73 days of age (cool carcass weight between 6.5 and 7.3 kg) and another when 80-90 days of age (cool carcass weight between 8.0 and 9.5 kg). Carcass yield has not been influenced by breed. On the other hand, females have shown yields higher than the males; as well as lambs of higher age/weight of carcass did show higher yields than those of lower age/weight of carcass. These breeds, which comprise the ones that receive the specific denomination for quality "Ternasco de Aragón", show similar carcass yields. However, sex and age/weight of carcass are variation factors of carcass yields which should be considered for a standardization and selling of a quality product.
sheep; lamb; carcass yield
