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Resource allocation, hyperphagia and compensatory growth.

William S C Gurney1, Roger M Nisbet

  • 1Department of Statistics and Modelling Science, University of Strathclyde, Glasgow G1 1XT, UK. bill@stams.strath.ac.uk

Bulletin of Mathematical Biology
|November 4, 2004
PubMed
Summary
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Organisms can grow faster after starvation (overcompensation), requiring both increased feeding (hyperphagia) and preferential resource allocation to structure. This principle applies to both juvenile and reproductive individuals.

Area of Science:

  • Physiology
  • Ecology
  • Mathematical Modeling

Background:

  • Organisms exhibit enhanced growth post-starvation, a phenomenon known as overcompensation.
  • Previous research identified hyperphagia and resource allocation as key drivers in juvenile overcompensation.

Purpose of the Study:

  • To extend the understanding of growth overcompensation to reproductively active individuals.
  • To compare a dynamic energy budget model with Kooijman's model, incorporating hyperphagia.

Main Methods:

  • Development and analysis of a dynamic energy budget model.
  • Extension of Kooijman's model to include hyperphagia.

Main Results:

  • Growth overcompensation in reproductive individuals requires both hyperphagia and preferential allocation of resources to structural growth.

Related Experiment Videos

  • A modified Kooijman model, accounting for hyperphagic responses, predicts growth overcompensation.

    • Conclusions:

    • Hyperphagia alone is insufficient for overcompensation; controlled resource allocation is crucial.
    • Dynamic energy budget models can effectively predict overcompensation in diverse life stages.