When less is best: female brown-headed cowbirds prefer less intense male displays.

PloS One
Adrian L O'Loghlen, Stephen I Rothstein

Abstract

Sexual selection theory predicts that females should prefer males with the most intense courtship displays. However, wing-spread song displays that male brown-headed cowbirds (Molothrus ater) direct at females are generally less intense than versions of this display that are directed at other males. Because male-directed displays are used in aggressive signaling, we hypothesized that females should prefer lower intensity performances of this display. To test this hypothesis, we played audiovisual recordings showing the same males performing both high intensity male-directed and low intensity female-directed displays to females (N = 8) and recorded the females' copulation solicitation display (CSD) responses. All eight females responded strongly to both categories of playbacks but were more sexually stimulated by the low intensity female-directed displays. Because each pair of high and low intensity playback videos had the exact same audio track, the divergent responses of females must have been based on differences in the visual content of the displays shown in the videos. Preferences female cowbirds show in acoustic CSD studies are correlated with mate choice in field and captivity studies and this is also likely to be true fo...Continue Reading

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Citations

Jun 27, 2014·Frontiers in Behavioral Neuroscience·Mai IwasakiNeal A Hessler
May 18, 2018·Proceedings. Biological Sciences·Kelly L RonaldJeffrey R Lucas
Apr 3, 2020·PloS One·Kelly L RonaldLaura M Hurley
Aug 19, 2017·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Kelly L RonaldJeffrey R Lucas
Mar 2, 2018·Current Zoology·Emma L R WareNikolaus F Troje

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