Muscularity and leg composition in lambs of different genotypes and ages at slaughter
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Data
2005-11-01
Autores
Sobrinho, AGD
Purchas, R. W.
Kadim, I. T.
Yamamoto, S. M.
Título da Revista
ISSN da Revista
Título de Volume
Editor
Empresa Brasil Pesq Agropec
Resumo
Carcass morphologic characteristics, muscularity and leg tissue composition of pasture fed lambs (Limestone Downs farm, New Zealand) born to Romney ewes and sired by Romney, East Friesian x (Finn x Texel), and Finn x Poll Dorset were evaluated for carcass composition and meat quality. Animals were slaughtered in two age groups (150 and 300 days), each group containing 15 animals of each sire breed, comprising a total of 90 animals. The East Friesian x (Finn x Texel) sired group presented the highest weight-adjusted percentage of leg muscle (1,975 g), and relatively to the Romney group, it had similar leg muscularity (0.45), but higher muscle to bone ratio (7x6.69). Finn x Poll Dorset sired group presented less leg muscularity (0.44) than the other genotypes. Lambs slaughtered at the older age had longer and leaner carcasses at the same weight, probably because of summer-autumn adverse conditions, typically with slower pasture growth rates and herbage quality. Both genotype and slaughter age influence carcass morphologic characteristics, muscularity and leg tissue composition of lambs.
Descrição
Palavras-chave
carcass, lamb, morphology
Como citar
Pesquisa Agropecuaria Brasileira. Brasilia Df: Empresa Brasil Pesq Agropec, v. 40, n. 11, p. 1129-1134, 2005.