Simulation models used for determining food intake and growth of ostriches: an overview

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Abstract
A formal method for determining the amino acid requirements of ostriches, from which a feeding strategy may be developed, requires characterisation of the growth potential of the body and feather proteins of these birds. Allometric equations may then be used to predict the growth of the physical parts of the ostrich, from which the optimal harvest time can be determined. Reasonable estimates of the parameters describing body and feather growth are now available. These values, together with the amino acid composition of the ostrich carcasses obtained at various stages of growth, make it possible to calculate the daily amino acid requirements of an ostrich growing at its potential. Subsequently, when given a description of the feed being offered, the desired food intake can be determined. The constraining effects of feed bulk and high temperatures are not yet well defined, but voluntary food intake in these birds when fed intensively under normal environmental conditions can now be predicted with the use of simulation models, from which it is possible to design a feeding strategy that will optimise performance.

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