Efeitos da relação volumoso: concentrado e do peso ao abate sobre os componentes da perna de cordeiros Ile de France x Ideal confinados
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Data
2002-04-01
Autores
Silva Sobrinho, Américo Garcia da [UNESP]
Machado, Márcia Rita Fernandes [UNESP]
Gastaldi, Kleber Augusto [UNESP]
Garcia, Cledson Augusto
Título da Revista
ISSN da Revista
Título de Volume
Editor
Sociedade Brasileira de Zootecnia
Resumo
Foram avaliados os seguintes componentes da perna dos animais: peso total e comprimento, peso total de músculos, peso dos músculos bíceps femural + semimembranoso + semitendinoso + quadríceps femural + adutor, peso total de ossos, peso do fêmur e das gorduras subcutânea, intermuscular e total, porcentagens de todos estes pesos em relação ao peso total da perna, comprimento e circunferência do fêmur e calculados a relação músculo:osso e o índice de musculosidade. Foram utilizados 20 cordeiros inteiros Ile de France x Ideal (F1) com peso vivo médio ao início do experimento de 18,2 ± 0,74 kg e idade média de 83 ± 10 dias. As relações volumoso (V):concentrado (C) utilizadas no experimento foram 50V:50C ou 30V:70C, com base na matéria seca (MS), sendo as rações isoprotéicas (18% de proteína bruta na MS) e isoenergéticas (10,92 MJ de energia metabolizável/kg MS). Os animais foram abatidos aos 30 ou 34 kg de peso vivo. Os abatidos mais pesados apresentaram perna, total de músculos, músculos bíceps femural + semimembranoso + semitendinoso + quadríceps femural + adutor, total de ossos, fêmur e gorduras subcutânea e total mais pesados, além de maior circunferência do fêmur. Os animais que receberam a ração com relação 30V:70C apresentaram menores relação músculo:osso e índice de musculosidade e maior porcentagem de gordura intermuscular em relação ao peso total da perna.
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.
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.
Descrição
Palavras-chave
Carcass, Confinement, Nutrition, Sheep, Carcaça, Confinamento, Nutrição, Ovinos
Como citar
Revista Brasileira de Zootecnia. Sociedade Brasileira de Zootecnia, v. 31, n. 2, p. 1017-1023, 2002.