Efeitos da relação volumoso: Concentrado e do peso ao abate sobre os componentes da perna de cordeiros Ile de France x Ideal confinados

Abstract

The following leg components were evaluated: weight and length, total muscle weight, sum weight of the biceps femoris + semimembranosus + semitendinosus + quadriceps femoris + adductor muscles, total bone weight, femur weight, subcutaneous, intermuscular and total fat weights. The weights were also expressed as a percentage of leg weight. Femur length, femur circumference, muscle:bone ratio and muscularity index were also calculated. Twenty Ile de France x Ideal (F1) intact lambs were used. At the start of the experiment, average live weight was 18.2±0.74kg and average age was 83±10 days-old. Roughage (R):concentrate (C) ratios used in the experiment were 50R:50C or 30R:70C, on dry matter (DM) basis. Crude protein was 18% (on DM) and metabolizable energy was 10.92 MJ/kg DM for both rations. The animals were slaughtered to 30 or 34kg of live weight. Heavier animals had bigger femur circumferences and also higher weights of leg and total muscle, sum weight of biceps femoris + semimembranosus + semitendinosus + quadriceps femoris + adductor muscles, total bone, femur, subcutaneous and total fat weights. Animals receiving the 30R:70C ration showed smaller muscle:bone ratio and muscularity index, and also higher percentage of intermuscular fat in relation to total leg weight.