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Effect of Rate of Gain and Slaughter Weight on Lamb Carcass Composition¹

University of Kentucky, Lexington

Abstract

Seventy-two lambs were placed in a 2 x 3 factorial arrangement of fast and slow gaining groups and Slaughtered in 3 groups at 36, 45 and 54 kg, respectively. Data were analyzed by analysis of variance to determine the effect of average daily gain and slaughter weight on carcass composition. The faster gaining lambs had no significant increase in total retail yield or edible portion but had a lower percent total fat trim and higher percent total bone than the slower gaining lambs. The heavier slaughter weight lambs had a higher percent total fat trim and a lower percent total retail yield, edible portion and bone than the lighter slaughter weight groups.

¹ The investigation reported in this paper (68-5-129) is in connection with a project of the Kentucky Agricultural Experiment Station and is published with approval of the Director.

² Present address: U.S. Meat Animal Research Center, U.S.D.A., A.H.R.A., Clay Center, Nebraska 68933.