Abstract
The left sides of Holstein bull and steer carcasses varying from 173 to 299 kg and finished to an average live backfat thickness of 0.76 cm were used in this study. Simple and multiple regression equations were generated for estimating the trimmed wholesale cuts and separable lean. It was found that weights were more precisely predicted than percentages. Although the longissimus was a more precise predictor than any of the other muscles, all muscle areas were poor contributors in the predictions. Backfat thickness was also a low precision predictor, especially of weights. Hot carcass weight, however, was such a useful predictor of weights that its sole effect was not significantly improved by the inclusion of any or all of the other predictors. It nevertheless gave very low precision in predicting percentages. Some selected estimation equations are recommended provided that the conditions of this study are maintained with regard to body finish and carcass weight. The advantage of using these equations is that hot carcass weight is readily obtainable.
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