Livestock recording systems generally endeavor to concentrate on the recording of traits associated with biological efficiency and ultimately, economical efficiency of production. Although it is recognised that the first step in this process needs to be breeding goal definition, the implementation of a proper recording mechanism to identify animals suited for parent stock is a prerequisite (van der Werf, 2000). Economical efficiency can simply be described in terms of only two classes of variables, namely returns and costs (Weller, 2000). Traditionally the only three main functions of costs were recognised as female production, reproduction and growth of young animals (Dickerson, 1970). Growth efficiency and associated quality defined properties have lately gained importance in setting medium to long-term profitability parameters in beef cattle. Normal practice includes some form of finishing phase (mostly intensive) where feedlot efficiency is of prime importance. The objective of this study is to compare some measure of biological efficiency associated with growth and finishing with profitability in the feedlot. 

J. van der Westhuizen, R. R van der Westhuizen, L. Bergh, F. Jordaan, H. E Theron

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume 2002. Session 10, , 10.26, 2002
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