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First evidence of yawn contagion in a wild monkey species

Articolo
Data di Pubblicazione:
2021
Abstract:
Yawn contagion occurs when individuals yawn in response to the yawn of others (triggers). This is the frst 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 confrms that yawn contagion is present in the wild. Yawn duration, mouth-opening degree and presence/absence of vocalisation (possibly modulating yawn detectability) did not afect 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.
Tipologia CRIS:
03A-Articolo su Rivista
Keywords:
contagious yawning, emotional contagion, yawning signal, primates, evolution of human behaviour, Ethiopia
Elenco autori:
Gallo, Alessandro; Zanoli, Anna; Caselli, Marta; Palagi, Elisabetta; Norscia, Ivan
Autori di Ateneo:
CASELLI Marta
NORSCIA Ivan
Link alla scheda completa:
https://iris.unito.it/handle/2318/1800490
Link al Full Text:
https://iris.unito.it/retrieve/handle/2318/1800490/797691/0f40c276b3553123d4194319a1a0c1703e624dbeb651222cba6429bb77c6aacb.pdf
Pubblicato in:
SCIENTIFIC REPORTS
Journal
  • Dati Generali
  • Aree Di Ricerca

Dati Generali

URL

10.1038/s41598-021-96423-3

Aree Di Ricerca

Settori (11)


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