Características de carcaça de ovinos de diferentes raças e categorias.

Abstract

The objective of the research was to evaluate the effects of two different genotypes and three animal categories on the carcass quality of grazing - finished sheep. The area where the animals were collected was the Alto Camaquã region, which includes municipalities of Bagé, Caçapava do Sul, Canguçu, Encruzilhada do Sul, Lavras do Sul, Piratini, Pinheiro Machado and Santana da Boa Vista. 81 animals of the Ideal and Corriedale races were divided into three categories, lambs, lambs and old animals, all belonging to the farms of the municipalities of Caçapava do Sul, Piratini and Lavras do Sul, were selected through a periodic evaluation of body condition, weight and ultrasonography , The animals were weighed, the body condition score was evaluated, as well as the ultrasonography to evaluate the loin eye area (LEA), the subcutaneous fat thickness (SFT) and the fat thickness in the croup. After the rest period of 16 hours of water diet, the animals were slaughtered obeying the normal flow of the commercial refrigerator with inspection at the state level of the city of Bagé - RS. After the carcasses were taken to the Laboratory of Science and Technology of the Meat - Embrapa Livestock South where the commercial cuts were made, separating pallets, legs, ribs with neck, loin, matambre and also the analyzes of AOL and EGS (in two Methods). Statistical analysis was performed using the statistical software R® version 2.2.1. When the mean values of the In vivo variables of sheep according to the races were analyzed, only the live weight variable (PV) was significant (P <0.01), where the Corriedale breed was heavier than the Ideal breed. When comparing the same variables, and according to the categories, all categories differed (P <0.01) for the variables PV, EGS and EGP, obtaining the highest averages for discard animals (47.76, 4.20 And 4.15), the lowest for lambs, and the intermediate for lambs. For post-slaughter variables, it was observed that there was no significant difference (P <0.01) for any of the variables, even for the two methods used to measure the thickness of subcutaneous fat, for races. When evaluating the commercial cuts of ovine carcasses according to the races and categories, it is concluded that Corriedale animals have heavier cuts than those of the Ideal breed and the animals of the categories lamb and discard have heavier cuts compared to lamb category .