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[Nutrient composition of the muscle, fat, and bone tissue of carcasses during the development of lambs of the merino breed with different feeding intensities].

In a developmental study of lambs, the following question was investigated: What is the influence of gender, bodyweight, and feeding intensity on the nutritional value of the carcass as well as the body tissues? This study was conducted with 108 lambs (50% males and 50% females) of the merino breed. The animals were fattened according to three feeding intensity levels ("high","medium", and "low") using varied feed concentrates and hay in their daily rations. They were slaughtered at body weights of 30, 45 or 55 kg. Six male and six female lambs were slaughtered at a bodyweight of 18 kg which was the initial weight of the fattening lambs. The left half of the slaughtered animal was carved according to the guidelines provided by the DLG (German Agricultural Society). For each cut, an examination of the meat(muscle), fatty tissue and bone/tendons was carried out and the percentages of these tissue components were determined for the whole joint. The samples of the tissues as well as the cuts were analysed for dry matter, crude protein, total fat level and crude ash. The carcasses of the male lambs showed higher protein content and lower fat levels. With increasing feeding intensity level and bodyweight, the differences in these nutritional components between the sexes rose. The muscle tissue (meat) of the lamb carcasses at the usual slaughter weight of 45 kg showed relatively low fat content (less than 10%). This was especially noticeable in carcasses of male lambs (less than 8%).