No place like home: Competition, dispersal and complex adaptation

L. Hadany*, I. Eshel, U. Motro

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

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.

Original languageEnglish
Pages (from-to)1328-1336
Number of pages9
JournalJournal of Evolutionary Biology
Volume17
Issue number6
DOIs
StatePublished - Nov 2004

Keywords

  • Adaptive landscape
  • Competition
  • Dispersal
  • Fitness
  • Migration
  • Peak shifts
  • Shifting balance

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