Document Detail


The evolution of the control of food intake.
MedLine Citation:
PMID:  12691176     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The ultimate goal of an organism is to maximise its inclusive fitness, and an important sub-goal must be the optimisation of the lifetime pattern of food intake, in order to meet the nutrient demands of survival, growth and reproduction. The conventional assumption that fitness is maximised by maximising daily food intake, subject to physical and physiological constraints, has been challenged recently. Instead, it can be argued that fitness is maximised by balancing benefits and costs over the organism's lifetime. The fitness benefits of food intake are a function of its contribution to survival, growth (including necessary body reserves) and reproduction. Against these benefits must be set costs. These costs include not only extrinsic foraging costs and risks, such as those due to predation, but also intrinsic costs associated with food intake, such as obesity and oxidative metabolism that may reduce vitality and lifespan. We argue that the aggregate of benefits and costs form the fitness function of food intake and present examples of such an approach to predicting optimal food intake.
Authors:
A W Illius; B J Tolkamp; J Yearsley
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Review    
Journal Detail:
Title:  The Proceedings of the Nutrition Society     Volume:  61     ISSN:  0029-6651     ISO Abbreviation:  Proc Nutr Soc     Publication Date:  2002 Nov 
Date Detail:
Created Date:  2003-04-14     Completed Date:  2003-05-02     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7505881     Medline TA:  Proc Nutr Soc     Country:  England    
Other Details:
Languages:  eng     Pagination:  465-72     Citation Subset:  IM    
Affiliation:
Institute of Cell, Animal and Population Biology, University of Edinburgh, West Mains Rd, Edinburgh EH9 3JT, UK. a.illius@ed.ac.uk
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MeSH Terms
Descriptor/Qualifier:
Animals
Behavior Control
Eating / physiology*
Environment
Evolution*
Genotype
Homeostasis*
Humans
Physical Fitness

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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