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Hamilton's rule confronts ideal free habitat selection

Författare:
Publiceringsår: 2001
Språk: Engelska
Sidor: 921-924
Publikation/Tidskrift/Serie: Proceedings / Royal Society. Biological sciences
Volym: 268
Nummer: 1470
Dokumenttyp: Artikel
Förlag: The Royal Society

Sammanfattning

If individuals occupy habitats in a way that maximizes their fitness, if they are free to occupy the habitats they choose and if fitness declines with population density, then their abundance across habitats should follow an ideal free distribution. But, if individuals are genetically related, this simple fitness-maximization mechanism breaks down. Habitat occupation should obey Hamiltons rule (natural selection favours traits causing a loss in individual fitness as long as they result in an equal or greater gain in inclusive fitness) and depends more on inclusive fitness than it does on individual fitness.We demonstrate that the resulting inclusive-fitness distribution inflates the population density in habitats of poorer inherent quality, creating pronounced source-sink dynamics.Wealso show that density-dependent habitat selection among relatives reinforces behaviours such as group defence and interspecific territoriality, and that it explains many anomalies in dispersal and foraging.

Disputation

Nyckelord

  • Biology and Life Sciences

Övriga

Published
Yes
  • ISSN: 0962-8452

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