Regime alimentar para ganho compensatório de ovinos em confinamento: pesos e rendimentos de carcaça e dos demais constituintes corporais comestíveis.

Abstract

This work had the aim to evaluate the effects of the diet for compensatory gain on the weights and income of carcass and the other constituents body edible of the Santa Ines sheep finished in confinement. It was used 40 male sheep completely Santa Ines, in averaging 17 ± 1.7 kg body weight (BW) and a 100 days old. The work consisted of two separate experimental periods: (1) period of food restriction (P1), of 42 days and four treatments, T1, T2, T3 and, T4 whose dry matter intakes were limited to 0, 20, 40 and 60 % of intake “ad libitum”, respectively, and (2) refeeding period (P2), also of 42 days, after which the P1 animals from all treatments were reefed back without restriction, in an "ad libitum". The experimental design was completely randomized, with four treatments and ten repetitions. Looking at the absolute weight (g) of the empty gastrointestinal tract, blood and feet, the relative weights (%) of liver, heart, head and feet, showed a negative linear increase (P <0.05) between the treatments, since the other variables as absolute weight of liver, heart, respiratory and feet, and the relative weights of the empty gastrointestinal tract, blood and respiratory tract showed no difference between treatments. The absolute weights (g) of live weight at slaughter, empty body weight, hot carcass weight, cold carcass weight, income of hot carcass and income of cold carcass showed negative linear growth (P <0.05) among treatments; the biological income did not differ between treatments. It follows therefore that the weights, measures and the incomes of hot and cold carcass decreased linearly with increasing dietary restriction, indicating that there was no compensatory gain for the main body component edible, the carcass. Meanwhile, the revenue of other body constituents edible were not or when have been altered, increased linearly with the increase of food restriction, showing the occurrence of compensatory growth in these constituents.