First evidence of yawn contagion in a wild monkey species

Abstract Yawn contagion occurs when individuals yawn in response to the yawn of others (triggers). This is the first account of yawn contagion in wild geladas (Theropithecus gelada), a monkey species that shows yawn contagion in captivity and is organized in core units (one-male/bachelor groups) for...

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Autores principales:	Alessandro Gallo, Anna Zanoli, Marta Caselli, Elisabetta Palagi, Ivan Norscia
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/44821cef4ab1455882095d0fcbfdb316
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spelling	oai:doaj.org-article:44821cef4ab1455882095d0fcbfdb3162021-12-02T17:41:12ZFirst evidence of yawn contagion in a wild monkey species10.1038/s41598-021-96423-32045-2322https://doaj.org/article/44821cef4ab1455882095d0fcbfdb3162021-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-96423-3https://doaj.org/toc/2045-2322Abstract Yawn contagion occurs when individuals yawn in response to the yawn of others (triggers). This is the first account of yawn contagion in wild geladas (Theropithecus gelada), a monkey species that shows yawn contagion in captivity and is organized in core units (one-male/bachelor groups) forming multilevel associations. In a population of geladas from the Kundi plateau (Ethiopia) we found that the yawning response was highest when geladas could perceive a triggering yawn, which confirms that yawn contagion is present in the wild. Yawn duration, mouth-opening degree and presence/absence of vocalisation (possibly modulating yawn detectability) did not affect the likelihood of contagion. Males and females, known to be both implicated in movement initiation within groups, were similarly powerful as yawn triggers. Instead, group membership and responder sex had a significant role in shaping the phenomenon. Yawn contagion was highest between individuals belonging to different core units and males were most likely to respond to others’ yawns. Because males have a non-negligible role in inter-group coordination, our results suggest that yawn contagion may have a communicative function that goes beyond the basic unit level.Alessandro GalloAnna ZanoliMarta CaselliElisabetta PalagiIvan NorsciaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Alessandro Gallo Anna Zanoli Marta Caselli Elisabetta Palagi Ivan Norscia First evidence of yawn contagion in a wild monkey species
description	Abstract Yawn contagion occurs when individuals yawn in response to the yawn of others (triggers). This is the first account of yawn contagion in wild geladas (Theropithecus gelada), a monkey species that shows yawn contagion in captivity and is organized in core units (one-male/bachelor groups) forming multilevel associations. In a population of geladas from the Kundi plateau (Ethiopia) we found that the yawning response was highest when geladas could perceive a triggering yawn, which confirms that yawn contagion is present in the wild. Yawn duration, mouth-opening degree and presence/absence of vocalisation (possibly modulating yawn detectability) did not affect the likelihood of contagion. Males and females, known to be both implicated in movement initiation within groups, were similarly powerful as yawn triggers. Instead, group membership and responder sex had a significant role in shaping the phenomenon. Yawn contagion was highest between individuals belonging to different core units and males were most likely to respond to others’ yawns. Because males have a non-negligible role in inter-group coordination, our results suggest that yawn contagion may have a communicative function that goes beyond the basic unit level.
format	article
author	Alessandro Gallo Anna Zanoli Marta Caselli Elisabetta Palagi Ivan Norscia
author_facet	Alessandro Gallo Anna Zanoli Marta Caselli Elisabetta Palagi Ivan Norscia
author_sort	Alessandro Gallo
title	First evidence of yawn contagion in a wild monkey species
title_short	First evidence of yawn contagion in a wild monkey species
title_full	First evidence of yawn contagion in a wild monkey species
title_fullStr	First evidence of yawn contagion in a wild monkey species
title_full_unstemmed	First evidence of yawn contagion in a wild monkey species
title_sort	first evidence of yawn contagion in a wild monkey species
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/44821cef4ab1455882095d0fcbfdb316
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_version_	1718379700006420480

First evidence of yawn contagion in a wild monkey species

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