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Genetic similarity between mates and extra-pair parentage in three species of shorebirds

Author

Listed:
  • Donald Blomqvist

    (Austrian Academy of Sciences)

  • Malte Andersson

    (Göteborg University)

  • Clemens Küpper

    (Austrian Academy of Sciences)

  • Innes C. Cuthill

    (University of Bristol)

  • János Kis

    (Szent István University)

  • Richard B. Lanctot

    (Migratory Bird Management)

  • Brett K. Sandercock

    (Kansas State University)

  • Tamás Székely

    (University of Bath)

  • Johan Wallander

    (Göteborg University)

  • Bart Kempenaers

    (Max Planck Research Centre for Ornithology)

Abstract

Matings between close relatives often reduce the fitness of offspring, probably because homozygosity leads to the expression of recessive deleterious alleles1,2,3,4,5. Studies of several animals have shown that reproductive success is lower when genetic similarity between parents is high4,5,6,7, and that survival and other measures of fitness increase with individual levels of genetic diversity8,9,10,11. These studies indicate that natural selection may favour the avoidance of matings with genetically similar individuals. But constraints on social mate choice, such as a lack of alternatives, can lead to pairing with genetically similar mates. In such cases, it has been suggested that females may seek extra-pair copulations with less related males4, but the evidence is weak or lacking4,5. Here we report a strong positive relationship between the genetic similarity of social pair members and the occurrence of extra-pair paternity and maternity (‘quasi-parasitism’) in three species of shorebirds. We propose that extra-pair parentage may represent adaptive behavioural strategies to avoid the negative effects of pairing with a genetically similar mate.

Suggested Citation

  • Donald Blomqvist & Malte Andersson & Clemens Küpper & Innes C. Cuthill & János Kis & Richard B. Lanctot & Brett K. Sandercock & Tamás Székely & Johan Wallander & Bart Kempenaers, 2002. "Genetic similarity between mates and extra-pair parentage in three species of shorebirds," Nature, Nature, vol. 419(6907), pages 613-615, October.
    • Handle: RePEc:nat:nature:v:419:y:2002:i:6907:d:10.1038_nature01104
    DOI: 10.1038/nature01104
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    Cited by:

    1. Adeline Loyau & Jérémie H Cornuau & Jean Clobert & Étienne Danchin, 2012. "Incestuous Sisters: Mate Preference for Brothers over Unrelated Males in Drosophila melanogaster," PLOS ONE, Public Library of Science, vol. 7(12), pages 1-6, December.

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