Courtship behaviour in Japanese macaques during heterosexual and homosexual consortships |
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Authors: | Vasey P L Rains D VanderLaan D P Duckworth N Kovacovsky S D |
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Institution: | aDepartment of Psychology, University of Lethbridge, Lethbridge, Alberta T1K 3M4, Canada bNeuroscience & Behaviour Program, Mount Holyoke College, South Hadley, MA, United States |
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Abstract: | Female Japanese macaques (Macaca fuscata) in the Arashiyama population near Kyoto, Japan, are unusual, in that they exhibit what many would consider to be male-typical sexual characteristics. Specifically, they mount other females within the context of temporary, but exclusive, sexual relationships (i.e., homosexual consortships) and they sometimes exhibit a preference for female sexual partners, even when given the choice of a sexually motivated male alternative. In this study, we examined whether female Japanese macaques also exhibited male-typical patterns of courtship behaviour during homosexual consortships. Data were collected on courtship behaviour during heterosexual and homosexual consortships in free-ranging Japanese macaques from the Arashiyama (Japan) population. We analyzed the occurrence of 12 different courtship behaviours during 3374 heterosexual inter-mount intervals and 1412 homosexual inter-mount intervals. Sex differences between heterosexually consorting males and females existed for only two of the 12 courtship behaviours we investigated: inclined-back presentations and sexual vocalizations. Dominant and subordinate homosexually consorting females were sex-typical in their expression of inclined-back presentations and sexual vocalizations. Consequently, facultative same-sex sexual partner preference, mounting and consortships do not co-occur with male-typical patterns of courtship behaviour in female Japanese macaques. |
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Keywords: | Courtship Sex differences Homosexual behaviour Japanese macaques |
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