Geoffrey D. Ower, Kevin A. Judge, Sandra Steiger, Kyle J. Caron, Rebecca A. Smith, John Hunt and Scott K. Sakaluk Multivariate sexual selection on male song structure in wild populations of sagebrush crickets, Cyphoderris strepitans (Orthoptera: Haglidae) Ecology and Evolution 3
Multivariate sexual selection was measured on the songs of sagebrush crickets captured from wild populations, and female preference for the measured song characters was tested with synthesized male songs broadcast to females in choice trials. Selection favored males producing songs with longer train and pulse durations (PD), but also longer intertrain intervals, suggesting an energetic constraint that necessitates “time outs” from bouts of singing. Playback trials confirmed selection for longer train and PDs, and revealed significant stabilizing selection on dominant frequency, suggesting that the female auditory system is tightly tuned to the species-specific call frequency.
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