Kempster A J
Meat and Livestock Commission, PO Box 44, Queensway House, Bletchley, Milton Keynes MK2 2EF, Great Britain.
Meat Sci. 1979 Jul;3(3):199-208. doi: 10.1016/0309-1740(79)90036-6.
Classification records for 136,000 sheep carcasses, a1 in 20 sample of those classified by the Meat and Livestock Commission in 1977, were used to examine the variation in weight, fatness and conformation of commercial British sheep. Overall mean carcass weight was 17·4 kg. Mean subcutaneous fat percentage in carcass (SF(e)) was estimated from the distribution of carcasses between fat classifications. Overall SF(e) was 11·3% and the regression of SF(e) on carcass weight was 0·44 %/kg. There were important differences in the characteristics of carcasses from abattoirs in different regions of the country: carcass weights ranged from 15·5 kg (Wales) to 23·4 kg (north of Scotland). Lambs slaughtered in the north of Scotland were also fattest (mean SF(e) = 13·9). The classification records were used together with results from MLC dissection studies to estimate excess fat production nationally. On the assumption that the consumer eats five parts lean to one part fat, excess carcass fat production from lambs and hoggets in 1977 was estimated to be 25,000 t.
1977年肉类与家畜委员会分类的136,000只羊胴体记录（每20只抽取1只作为样本），用于研究英国商业用羊在体重、肥瘦度和体型方面的差异。胴体总体平均重量为17.4千克。根据胴体在脂肪分类中的分布情况估算胴体平均皮下脂肪百分比（SF(e)）。总体SF(e)为11.3%，SF(e)对胴体重量的回归系数为0.44%/千克。该国不同地区屠宰场的胴体特征存在显著差异：胴体重量从15.5千克（威尔士）到23.4千克（苏格兰北部）不等。在苏格兰北部屠宰的羔羊也是最肥的（平均SF(e)=13.9）。这些分类记录与肉类与家畜委员会的解剖研究结果一起，用于估算全国范围内多余脂肪的产量。假设消费者食用的瘦肉与脂肪比例为5:1，1977年羔羊和青年羊胴体多余脂肪产量估计为25,000吨。
