Document Detail


On the (dis) advantages of cannibalism.
MedLine Citation:
PMID:  16283414     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Cannibalism is an interaction between individuals that can produce counter- intuitive effects at the population level. A striking effect is that a population may persist under food conditions such that the non-cannibalistic variant is doomed to go extinct. This so-called life boat mechanism has received considerable attention. Implicitly, such studies sometimes suggest, that the life boat mechanism procures an evolutionary advantage to the cannibalistic trait. Here we compare, in the context of a size structured population model, the conditions under which the life boat mechanism works, with those that guarantee, that a cannibalistic mutant can invade successfully under the steady environmental conditions as set by a non-cannibalistic resident. We find qualitative agreement and quantitative difference. In particular, we find that a prerequisite for the life boat mechanism is, that cannibalistic mutants are successful invaders. Roughly speaking, our results show that cannibalism brings advantages to both the individuals and the population when adult food is limiting.
Authors:
Ph Getto; O Diekmann; A M de Roos
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2005-11-10
Journal Detail:
Title:  Journal of mathematical biology     Volume:  51     ISSN:  0303-6812     ISO Abbreviation:  J Math Biol     Publication Date:  2005 Dec 
Date Detail:
Created Date:  2005-12-02     Completed Date:  2006-04-20     Revised Date:  2009-11-03    
Medline Journal Info:
Nlm Unique ID:  7502105     Medline TA:  J Math Biol     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  695-712     Citation Subset:  IM    
Affiliation:
Department of Mathematics, University of Utrecht, P.O. Box 80010, 3580 TA Utrecht, The Netherlands. phgetto@yahoo.com
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MeSH Terms
Descriptor/Qualifier:
Animals
Cannibalism*
Evolution
Food Supply
Humans
Mathematics
Models, Biological*
Population Dynamics

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