Sexual selection drives rapid divergence in bowerbird display traits

J. Albert C. Uy, Gerald Borgia

Research output: Contribution to journalArticle

117 Scopus citations

Abstract

Sexual selection driving display trait divergence has been suggested as a cause of rapid speciation, but there is limited supporting evidence for this from natural populations. Where speciation by sexual selection has occurred in newly diverged populations, we expect that there will be significant differences in female preferences and corresponding male display traits in the absence of substantial genetic and other morphological differentiation. Two allopatric populations of the Vogelkop bowerbird, Amblyornis inornatus, show large, qualitative differences in a suite of display traits including bower structure and decorations. We experimentally demonstrate distinct male decoration color preferences within each population, provide direct evidence of female preferences for divergent decoration and bower traits in the population with more elaborate display, and show that there is minimal genetic differentiation between these populations. These results support the speciation by sexual selection hypothesis and are most consistent with the hypothesis that changes in male display have been driven by divergent female choice.

Original languageEnglish (US)
Pages (from-to)273-278
Number of pages6
JournalEvolution
Volume54
Issue number1
DOIs
StatePublished - Feb 2000
Externally publishedYes

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Keywords

  • Amblyornis inornatus
  • Bowerbirds
  • Premating isolation
  • Sexual selection
  • Speciation

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Ecology, Evolution, Behavior and Systematics
  • Agricultural and Biological Sciences (miscellaneous)
  • Genetics(clinical)
  • Ecology
  • Genetics

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