The cooperative sex: Sexual interactions among female bonobos are linked to increases in oxytocin, proximity and coalitions.

Autor: Moscovice LR; Institute of Behavioural Physiology, Leibniz Institute for Farm Animal Biology, Wilhelm-Stahl-Allee 2, D-18196 Dummerstorf, Germany; Anthropology Department, Emory University, 1557 Dickey Drive, Atlanta, GA 30322, USA. Electronic address: Moscovice@fbn-dummerstorf.de., Surbeck M; Department of Human Evolutionary Biology, Harvard University, Peabody Museum, 5(th) Floor, 11 Divinity Avenue, Cambridge, MA 02138, USA; Primatology Department, Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, 04103 Leipzig, Germany. Electronic address: Surbeck@eva.mpg.de., Fruth B; Natural Sciences and Psychology, Liverpool John Moores University, Byrom Street, Liverpool L3 3AF, United Kingdom; Centre for Research and Conservation, Royal Zoological Society of Antwerp, Koningin Astridplein 20-26, 2018 Antwerp, Belgium. Electronic address: B.I.Fruth@ljmu.ac.uk., Hohmann G; Primatology Department, Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, 04103 Leipzig, Germany. Electronic address: Hohmann@eva.mpg.de., Jaeggi AV; Anthropology Department, Emory University, 1557 Dickey Drive, Atlanta, GA 30322, USA; Institute of Evolutionary Medicine, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland. Electronic address: Adrian.jaeggi@iem.uzh.ch., Deschner T; Primatology Department, Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, 04103 Leipzig, Germany. Electronic address: Deschner@eva.mpg.de.
Jazyk: angličtina
Zdroj: Hormones and behavior [Horm Behav] 2019 Nov; Vol. 116, pp. 104581. Date of Electronic Publication: 2019 Sep 10.
DOI: 10.1016/j.yhbeh.2019.104581
Abstrakt: In some species habitual same-sex sexual behavior co-occurs with high levels of intra-sexual alliance formation, suggesting that these behaviors may be linked. We tested for such a link by comparing behavioral and physiological outcomes of sex with unrelated same- and opposite-sex partners in female bonobos (Pan paniscus). We analyzed behavioral outcomes following 971 sexual events involving n = 19 female and n = 8 male adult and sub-adult members of a wild, habituated bonobo community. We additionally collected n = 143 urine samples before and after sexual interactions to non-invasively measure oxytocin (OT), which modulates female sexual behavior and facilitates cooperation in other species. The majority of sexual events (65%) consisted of female same-sex genito-genital rubbing (or GG-rubbing). Female dyads engaged in significantly more sexual interactions than did inter-sexual dyads, and females were more likely to remain within close proximity to their partners following GG-rubbing. Females also exhibited greater increases in urinary OT following GG-rubbing compared with copulations, indicating a physiological basis for increased motivation to cooperate among females. The frequency of coalitionary support among non-kin was positively predicted by the frequency of sexual interactions for female as well opposite-sex dyads, although coalitionary support tended to be more frequent among females. The emergence of habitual same-sex sexual behavior may have been an important step in the evolution of cooperation outside of kinship and pair-bonds in one of our closest phylogenetic relatives.
(Copyright © 2019 The Authors. Published by Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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