No place like home: competition, dispersal and complex adaptation

In many groups of organisms the location of settling is determined by competition, and fitter individuals tend to settle closer to their natal territory than less fit ones. In this work we study the implications of this phenomenon to the problem of adaptation and speciation on a rugged adaptive land...

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Bibliographic Details
Published inJournal of evolutionary biology Vol. 17; no. 6; pp. 1328 - 1336
Main Authors Hadany, L., Eshel, I., Motro, U.
Format Journal Article
LanguageEnglish
Published Oxford, UK Blackwell Science Ltd 01.11.2004
Blackwell Publishing Ltd
Subjects
Adaptability
Adaptation, Biological
adaptive landscape
Competition
Competitive Behavior - physiology
Computer Simulation
Demography
Dispersal
Evolutionary biology
fitness
Genetic diversity
Genetics, Population
Inbreeding
migration
Models, Genetic
peak shifts
Selection, Genetic
shifting balance
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Summary:In many groups of organisms the location of settling is determined by competition, and fitter individuals tend to settle closer to their natal territory than less fit ones. In this work we study the implications of this phenomenon to the problem of adaptation and speciation on a rugged adaptive landscape. One consequence of fitness‐associated dispersal (FAD) is that individuals with high fitness are more likely to experience inbreeding, especially with other fit individuals. Another consequence is that when dispersal is costly, the less fit individuals are more likely to pay the cost. When a rare and advantageous allelic combination appears, FAD may increase its chances to spread in the population. In a two‐locus two‐alleles model with negative epistasis, we find that FAD significantly shortens the waiting time for an adaptive peak shift in comparison with random dispersal.
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ISSN:1010-061X
1420-9101
DOI:10.1111/j.1420-9101.2004.00768.x