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Energy-budget strategies for growth in mammals and birds

Published online by Cambridge University Press:  02 September 2010

J. K. Kirkwood  and
A. J. F. Webster
J. K. Kirkwood
Affiliation:
Department of Animal Husbandry, University of Bristol School of Veterinary Science, Langford House, Langford, Bristol BS18 7DU
A. J. F. Webster
Affiliation:
Department of Animal Husbandry, University of Bristol School of Veterinary Science, Langford House, Langford, Bristol BS18 7DU
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Abstract

The concepts of metabolic time and size are used, respectively, to compare maturing time and energy exchanges during growth in homeotherms. Maturation rate, expressed per unit of mature size (A1/4) is relatively constant for mammals, irrespective of attempts by man to select for rapid growth. Precocial birds mature more rapidly, however, and altricial birds more rapidly still. These differences are explained in terms of different patterns of energy exchange. It is proposed that maturation time is ultimately determined by size-related constraints on rate of metabolism during growth.

Type
Research Article
Information
Animal Production , Volume 38 , Issue 2 , April 1984 , pp. 147 - 155
Copyright
Copyright © British Society of Animal Science 1984

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References

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