Positive assortative mating between recently described sympatric morphs of Icelandic sticklebacks.

GA Olafsdottir, Michael Gordon Ritchie, SS Snorrason

Research output: Contribution to journalArticlepeer-review

46 Citations (Scopus)

Abstract

Recently, models of sympatric speciation have suggested that assortative mating can develop between sympatric morphs due to divergence in an ecologically important character. For example, in sympatric pairs of threespine stickleback (Gasterosteus aculeatus L.) size-assortative mating seems to be instrumental in reproductive isolation. Here, we examine courtship behaviour and assortative mating of newly described sympatric stickleback morphs in Lake Thingvallavatn, Iceland. We find that the two morphs show strong positive assortative mating. However, the mechanism involved in mate choice does not seem to be as straightforward as in other similar systems of sympatric stickleback morphs and may involve variation in nest type.

Original languageEnglish
Pages (from-to)250-252
Number of pages3
JournalBiology Letters
Volume2
DOIs
Publication statusPublished - 22 Jun 2006

Keywords

  • speciation
  • assortative mating
  • stickleback
  • REPRODUCTIVE ISOLATION
  • THREESPINE STICKLEBACK
  • SEXUAL SELECTION
  • SPECIATION
  • POPULATIONS
  • PREFERENCE

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