Du är här

No evidence for inbreeding avoidance in a great reed warbler population

Författare:
Publiceringsår: 2007
Språk: Engelska
Sidor: 157-164
Publikation/Tidskrift/Serie: Behavioral Ecology
Volym: 18
Nummer: 1
Dokumenttyp: Artikel
Förlag: Oxford University Press

Sammanfattning

Inbreeding depression may drive the evolution of inbreeding avoidance through dispersal and mate choice. In birds, many species show female-biased dispersal, which is an effective inbreeding avoidance mechanism. In contrast, there is scarce evidence in birds for kin discriminative mate choice, which may, at least partly, reflect difficulties detecting it. First, kin discrimination may be realized as dispersal, and this is difficult to distinguish from other causes of dispersal. Second, even within small, isolated populations, it is often difficult to determine the potential candidates available to a female when choosing a mate. We sought evidence for inbreeding avoidance via kin discrimination in a breeding population of great reed warblers (Acrocephalus arundinaceus) studied over 17 years. Inbreeding depression is strong in the population, suggesting that it would be adaptive to avoid relatives as mates. Detailed data on timing of settlement and mate search movements made it possible to identify candidate mates for each female, and long-term pedigrees and resolved parentage enabled us to estimate relatedness between females and their candidate mates. We found no evidence for kin discrimination: mate choice was random with respect to relatedness when all mate-choice events were considered, and, after correction for multiple tests, also in all breeding years. We suggest that dispersal is a sufficient inbreeding avoidance mechanism in most situations, although the lack of kin discriminative mate choice has negative consequences for some females, because they end up mating with closely related males that lowers their fitness.

Disputation

Nyckelord

  • Biology and Life Sciences
  • pedigree
  • kin
  • inbreeding depression
  • inbreeding avoidance
  • dispersal
  • recognition
  • relatedness

Övriga

Published
Yes
  • Molecular Ecology and Evolution Lab
  • ISSN: 1465-7279
  • ISSN: 1045-2249

Box 117, 221 00 LUND
Telefon 046-222 00 00 (växel)
Telefax 046-222 47 20
lu [at] lu [dot] se

 

Fakturaadress: Box 188, 221 00 LUND
Organisationsnummer: 202100-3211
Om webbplatsen