Resource allocation, hyperphagia and compensatory growth

William S. C. Gurney, Roger M. Nisbet

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Organisms often shown enhanced growth during recovery from starvation, and can even overtake continuously fed conspecifics (overcompensation). In an earlier paper (Ecology 84, 2777-2787), we studied the relative role played by hyperphagia and resource allocation in producing overcompensation in juvenile (non-reproductive) 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 self-consistent 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.
LanguageEnglish
Pages1731-1753
Number of pages23
JournalBulletin of Mathematical Biology
Volume66
Issue number6
DOIs
Publication statusPublished - 30 Nov 2004

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Hyperphagia
overeating
Resource Allocation
compensatory growth
resource allocation
Resource allocation
Growth
Recovery
starvation
Ecology
assimilation (physiology)
energy budget
Budgets
Instantaneous
Starvation
Animals
Compensation and Redress
ecology
Reproduction
Model

Keywords

  • hyperphagia
  • mathematics
  • statistics
  • biology

Cite this

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Resource allocation, hyperphagia and compensatory growth. / Gurney, William S. C.; Nisbet, Roger M.

In: Bulletin of Mathematical Biology, Vol. 66, No. 6, 30.11.2004, p. 1731-1753.

Research output: Contribution to journalArticle

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