| On the (dis) advantages of cannibalism. | |
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MedLine Citation:
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PMID: 16283414 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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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. |
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Authors:
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Ph Getto; O Diekmann; A M de Roos |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2005-11-10 |
Journal Detail:
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Title: Journal of mathematical biology Volume: 51 ISSN: 0303-6812 ISO Abbreviation: J Math Biol Publication Date: 2005 Dec |
Date Detail:
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Created Date: 2005-12-02 Completed Date: 2006-04-20 Revised Date: 2009-11-03 |
Medline Journal Info:
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Nlm Unique ID: 7502105 Medline TA: J Math Biol Country: Germany |
Other Details:
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Languages: eng Pagination: 695-712 Citation Subset: IM |
Affiliation:
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Department of Mathematics, University of Utrecht, P.O. Box 80010, 3580 TA Utrecht, The Netherlands. phgetto@yahoo.com |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Cannibalism* Evolution Food Supply Humans Mathematics Models, Biological* Population Dynamics |
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