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Cuticular hydrocarbons influence female attractiveness to males in the Australian field cricket, Teleogryllus

Melissa L Thomas1, Leigh W Simmons

  • 1Centre for Evolutionary Biology, School of Animal Biology, The University of Western Australia, Crawley, WA, Australia. mlthomas@cyllene.uwa.edu.au

Journal of Evolutionary Biology
|March 10, 2010
PubMed
Summary

Male Australian field crickets show mating preferences for female cuticular hydrocarbons. This suggests sexual selection can act on female traits, potentially driving sexual dimorphism in this species.

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Area of Science:

  • Evolutionary Biology
  • Behavioral Ecology
  • Sexual Selection

Background:

  • Sexual dimorphism is often attributed to sexual selection on male traits.
  • Female signal traits are typically overlooked in studies of sexual selection.
  • Cuticular hydrocarbons are crucial chemical signals in insect reproduction.

Purpose of the Study:

  • To investigate male mating preferences in the Australian field cricket, *Teleogryllus oceanicus*.
  • To determine if male preferences can exert selection on female cuticular hydrocarbons.
  • To explore the role of female traits in the evolution of sexual dimorphism.

Main Methods:

  • Multivariate selection analysis was employed to assess male mating preferences.
  • Female cuticular hydrocarbons were analyzed as potential targets of sexual selection.
  • Comparison with previous studies on female choice in *T. oceanicus*.

Main Results:

  • Male *T. oceanicus* preferences can exert selection on female cuticular hydrocarbons.
  • Both stabilizing and disruptive preference gradients were observed.
  • A weak negative directional preference for female cuticular hydrocarbons was detected.

Conclusions:

  • Male mating preferences can significantly influence female signal traits.
  • Asymmetrical sexual selection between sexes may contribute to sexual dimorphism.
  • Further research is needed to fully understand the evolutionary implications of these findings.