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Problems in modelling the growth of poultry

Published online by Cambridge University Press:  18 September 2007

G.C. Emmans
G.C. Emmans
Affiliation:
Genetics and Behavioural Sciences, Scottish Agricultural College, Bush Estate, Penicuik, Midlothian EH26 0QE, UK
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Abstract

The problems of predicting the growth, body conformation and feed intake of a flock of growing chickens are analysed in order to identify the key components needed to produce an effective model. Distinctions are made between the problems of a bird at one time, a bird over time, and a group of birds at a time. When considering a bird at a time a series of sub-problems is identified, including the prediction of the potential for growth and the way in which body composition should be taken into account. Given solutions to these problems, those of predicting the requirement of the bird for the resources of energy and nutrients for maintenance, growth and fattening then arise. For a bird fed ad libitum the rate of feed intake needs to be accurately predicted by the model if it is to be successful in predicting growth rate and efficiency. An approach to this problem is outlined, together with an initial approach to the problems raised when attempting to model populations of birds.

Keywords

Broilerenergyfeed intakegrowthgrowth modelpoultry
Type
Research Article
Information
World's Poultry Science Journal , Volume 51 , Issue 1 , March 1995 , pp. 77 - 89
Copyright
Copyright © Cambridge University Press 1995

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References

Armsby, H.P. and Moulton, C.R. (1925) The Animal as a Convertor of Matter and Energy, Chemical Catalog Co, New YorkGoogle Scholar
Brody, S. (1945) Bioenergetics and Growth, Reinhold Publishing, New YorkGoogle Scholar
De Groote, G. (1974) Utilisation of metabolisable energy. In: Energy Requirements of Poultry, (Eds Morris, T.R. and Freeman, B.M.), British Poultry Science Ltd, Edinburgh, pp. 113–133Google Scholar
Emmans, G.C. (1981a) Computer simulation in poultry nutrition. 3rd European Symposium on Poultry Nutrition, Peebles,Scotland, pp. 91–103Google Scholar
Emmans, G.C. (1981b) A model of the growth and feed intake of ad libitum fed animals, particularly poultry. In: Computers in Animal Production. Occasional Publication No. 5. British Society of Animal Production, pp. 103–110Google Scholar
Emmans, G.C. (1984) An additive and linear energy scale. Animal Production 38: 538Google Scholar
Emmans, G.C. (1987) Growth, body composition and feed intake. World's Poultry Science Journal 43: 208–227CrossRefGoogle Scholar
Emmans, G.C. (1988) Genetic components of potential and actual growth. In: Animal Breeding Opportunities. Occasional Publication No. 12. British Society of Animal Production, pp. 153–181Google Scholar
Emmans, G.C. (1989) The growth of turkeys. In: Recent Advances in T urkey Science (Eds Nixey, C. and Grey, T.C.), Poultry Science Symposium No. 21, Butterworths, London, pp. 135–166Google Scholar
Emmans, G.C. (1994) Effective energy: a concept of energy utilisation applied across species. British Journal of Nutrition 71: 801–824CrossRefGoogle ScholarPubMed
Emmans, G.C. and Fisher, C. (1986) Problems in nutritional theory. In: Nutrient Requirements of Poultry and Nutritional Research, Poultry Science Symposium No. 19 (Eds Fisher, C. and Boorman, K.N.) Butterworths, London, pp. 9–39Google Scholar
Emmans, G.C. and Oldham, J.D. (1988) Modelling of growth and nutrition in different species. In: Modelling of Livestock Production Systems (Eds Korver, S. and van Arrendonk, J.A.M.), Kluwer Academic Publishers, Dordrecht, Netherlands, pp. 13–21Google Scholar
Gompertz, B. (1825) On the nature of the function expressive of the law of human mortality and on a new method of determining the value of life contingencies. Philosophical Transactions of the Royal Society, 513–585Google Scholar
Gous, R.M., Emmans, G.C. and Fisher, C. (1992) The response of broilers to feeds differing in protein content following a period of fattening. Poultry Science 71 (Supplement 1): 151Google Scholar
Kyriazakis, I. and Emmans, G.C. (1992) The growth of mammals following a period of nutritional limitation. Journal of Theoretical Biology 156: 485–498CrossRefGoogle ScholarPubMed
Oldham, J.D. and Emmans, G.C. (1990) Animal performance as the criterion for feed evaluation. In: Feedstuff Evaluation (Eds Wiseman, J. and Cole, D.J.A.), Butterworths, London, pp. 73–90CrossRefGoogle Scholar
St.Taylor, C.S. and Young, G.B. (1968) Equilibrium weight in relation to food intake and genotype in twin cattle. Animal Production 10: 393–412Google Scholar
Wilson, B.J. (1977) Growth curves: their analysis and use. In: Growth and Poultry Meat Production (Eds Boorman, K.N. and Wilson, B.J.), Poultry Science Symposium No. 12, British Poultry Science Ltd, Edinburgh, pp. 89–115Google Scholar