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No evidence for inbreeding avoidance in a great reed warbler population

Hansson, Bengt LU ; Jack, L; Christians, JK; Pemberton, JM; Åkesson, Mikael LU ; Westerdahl, Helena LU ; Bensch, Staffan LU and Hasselquist, Dennis LU (2007) In Behavioral Ecology 18(1). p.157-164
Abstract
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... (More)
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. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
pedigree, kin, inbreeding depression, inbreeding avoidance, dispersal, recognition, relatedness
in
Behavioral Ecology
volume
18
issue
1
pages
157 - 164
publisher
Oxford University Press
external identifiers
  • wos:000243060000021
  • scopus:33845873611
ISSN
1045-2249
DOI
10.1093/beheco/arl062
language
English
LU publication?
yes
id
5310bd00-6058-4b75-831c-56ab5bca884a (old id 167258)
date added to LUP
2007-06-26 07:30:38
date last changed
2017-11-05 03:29:27
@article{5310bd00-6058-4b75-831c-56ab5bca884a,
  abstract     = {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.},
  author       = {Hansson, Bengt and Jack, L and Christians, JK and Pemberton, JM and Åkesson, Mikael and Westerdahl, Helena and Bensch, Staffan and Hasselquist, Dennis},
  issn         = {1045-2249},
  keyword      = {pedigree,kin,inbreeding depression,inbreeding avoidance,dispersal,recognition,relatedness},
  language     = {eng},
  number       = {1},
  pages        = {157--164},
  publisher    = {Oxford University Press},
  series       = {Behavioral Ecology},
  title        = {No evidence for inbreeding avoidance in a great reed warbler population},
  url          = {http://dx.doi.org/10.1093/beheco/arl062},
  volume       = {18},
  year         = {2007},
}