Document Detail

Co-operation and defection: playing the field and the ESS.
MedLine Citation:
PMID:  1943139     Owner:  NLM     Status:  MEDLINE    
If food is patchily dispersed, food clumps being very rich, but rare and hard to find, each individual in a foraging flock then faces an evident dilemma: whether to co-operate and participate in the search, thus enhancing the rate by which rich patches are discovered, or to defect and let others do the searching, thus avoiding any possible expenditures and risks involved in the search (but enjoying the abundant resources once a rich patch is discovered). This conflict (and its possible solution) is treated as an example in the analysis of the synergistic n-player game presented in this paper. After deriving conditions for the existence of a mixed ESS in such games, the evolutionary stability of the mixed strategy against invasions by pure strategists, in particular against invasions by recognizable defectors, is analyzed. Whereas in any "degenerating" mixed-strategy model a recognizable defector can invade and spread, a "non-degenerating" model can sometimes yield a mixed ESS which is immune to such invasions.
U Motro
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of theoretical biology     Volume:  151     ISSN:  0022-5193     ISO Abbreviation:  J. Theor. Biol.     Publication Date:  1991 Jul 
Date Detail:
Created Date:  1991-11-25     Completed Date:  1991-11-25     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  0376342     Medline TA:  J Theor Biol     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  145-54     Citation Subset:  IM    
Department of Statistics, Hebrew University of Jerusalem, Israel.
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MeSH Terms
Feeding Behavior / physiology*
Game Theory*
Models, Biological

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

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