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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
Summary
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.
- 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.