Influence of sex and year on carcass characteristics important in the marketing of second cross lambs [Australia; sheep]
1990
Thatcher, L.P. | Maden, J.J.L. | Plant, C.L. (Victorian Dept. of Agriculture and Rural Affairs, Rutherglen (Australia). Rutherglen Research Inst.)
Apart from carcass weight and fat depth (GR) which are used in the AUS-MEAT lamb carcass description, it was found that sex also influenced the level of subcutaneous fat; and also the GR measurement and distribution of subcutaneous fat. Lamb sex should therefore also be included to improve carcass description, and this would be more important as larger carcasses were used. The area of the M. longissimus dorsi at the 12th rib (EMA) was not affected by sex, but it was a significant inclusion with carcass weight in predicting hindleg muscle content. Year of birth affected level and distribution of subcutaneous fat, EMA, and primal joint size even after GR and carcass weight were described. However, the major influence of year was not clear, because there were 2 times of lambing in 2 years when nutrition was vastly different.
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