Características de carcaça de diferentes genótipos de caprinos e ovinos terminados em pastejo na caatinga.

Abstract

Characteristics concerning weight of animal and yield of carcass and non carcass constituents were evaluated for four goat and sheep genotypes browsing in the Caatinga rangeland. A total of 40 uncastrated males, with an initial average age and body weight of 120 days and 18.76 kg, respectively, were used: 10 undefined breed goats (UBG), 10 crossbred Boer (½ Boer x ½ UBG), 10 undefined breed sheep (UBS) and 10 crossbred Dorper (½ Dorper x ½ UBS). Initial and final weight, average daily body weight gain and total weight gain did not differ significantly between genotypes, as well as the variables body weight after fasting, empty body weight, hot carcass weight, cold carcass weight, weight loss by cooling, true yield, biological yield and commercial yield. The weight of the full gastrointestinal tract (TGIC) (g), blood, heart and spleen (g) were heavier for crossbred Dorper than for UBG, while the weight of TGIC (in %), empty gastrointestinal tract, liver, spleen (in %) and kidneys were not affected by genotypes. The weight of the reproductive organs, respiratory trait (g), feet (%) and tail were statistically different between genotypes, with the highest average observed for crossbred Dorper, except for feet weight (%). Most of the weight characteristics of the edible and inedible non-carcass constituents, expressed in gor in %, were not affected by genotypes.