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Ohio Agricultural Research and Development Center,4 Wooster
Abstract
THE rational and procedures for estimating body composition by densitometric methods have recently been reviewed by Pearson, Purchas and Reineke (1968). In the same publication Garrett (1968) states that information concerning relationships between empty body composition and densitometric measurements is very limited for cattle. Until recently, studies involving these relationships have utilized the equations published by Kraybill, Hankins and Bitter (1951), Kraybill, Bitter and Hankins (1952) and by Reid, Wellington and Dunn (1955). For example, these equations were used by Garrett, Meyer and Lofgreen (1959), Lofgreen (1965) and Meyer, Lofgreen and Garrett (1960) for investigating the net energy requirements of beef cattle under the California system for Net Energy Expressions. Guenther et al. (1967) developed an equation for predicting total weight of fat in a beef carcass from specific gravity measurements. They reported correlations between determined fat and predicted fat of 0.93 and 0.99 with two groups of animals. Garrett (1968) reported a correlation coefficient of 0.96 between carcass density and percent empty body fat.
1 Approved for publication as Journal Article No. 67-69 by the Associate Director for the Ohio Agricultural Research and Development Center, Wooster.
2 Present address: Estacion Balcarce-(I.N.T.A.) Balcarce, Provincia de Buenos Aires, Argentina.
3 Present address: Department of Animal Sciences and Industry, Oklahoma State University, Stillwater 74074.
4 Department of Animal Science.
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