Gurney, W.S.C. and Nisbet, R.M. (2004) Resource allocation, hyperphagia and compensatory growth. Bulletin of Mathematical Biology, 66 (6). pp. 17311753. ISSN 00928240

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Abstract
Organisms often shown enhanced growth during recovery from starvation, and can even overtake continuously fed conspecifics (overcompensation). In an earlier paper (Ecology 84, 27772787), we studied the relative role played by hyperphagia and resource allocation in producing overcompensation in juvenile (nonreproductive) animals. We found that, although hyperphagia always produces growth compensation, overcompensation additionally requires protein allocation control which routes assimilate preferentially to structure during recovery. In this paper we extend our model to cover reproductively active individuals and demonstrate that growth rate overcompensation requires a similar combination of hyperphagia and allocation control which routes the part of enhanced assimilation not used for reproduction preferentially towards structural growth. We compare the properties of our dynamic energy budget model with an earlier proposal, due to Kooijman, which we extend to include hyperphagia. This formulation assumes that the rate of allocation to reserves is controlled by instantaneous feeding rate, and one would thus expect that an extension to include hyperphagia would not predict growth overcompensation. However, we show that a selfconsistent representation of the hyperphagic response in Kooijman's model overrides its fundamental dynamics, leading to preferential allocation to structural growth during recovery and hence to growth overcompensation.
Item type:  Article 

ID code:  4611 
Keywords:  hyperphagia, mathematics, statistics, biology, Probabilities. Mathematical statistics, Biology, Agricultural and Biological Sciences(all), Neuroscience(all), Biochemistry, Genetics and Molecular Biology(all), Environmental Science(all), Immunology, Computational Theory and Mathematics, Mathematics(all), Pharmacology 
Subjects:  Science > Mathematics > Probabilities. Mathematical statistics Science > Natural history > Biology 
Department:  Faculty of Science > Mathematics and Statistics 
Depositing user:  Strathprints Administrator 
Date Deposited:  07 Nov 2007 
Last modified:  13 Dec 2015 13:33 
URI:  http://strathprints.strath.ac.uk/id/eprint/4611 
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