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  1. Pubblicazioni

Yawn contagion in domestic pigs (Sus scrofa)

Articolo
Data di Pubblicazione:
2021
Abstract:
Contrary to spontaneous yawning—an ancient phenomenon common to vertebrates—contagious yawning (elicited by others’ yawns) has been found only in highly social species and may reflect an emotional inter-individual connection. We investigated yawn contagion in the domestic pig, Sus scrofa. Owing to the complex socio-emotional and cognitive abilities of Sus scrofa, we posited that yawn contagion could be present in this species (Prediction 1) and influenced by individual/social factors (Prediction 2). In June-November 2018, on 104 semi-free ranging adolescent/adult pigs, 224 videos were recorded for video analysis on yawning. Kinship information was refined via genetic analyses. Statistical elaboration was conducted via GLMMs and non-parametric/randomization/crosstabulation tests. We found yawn contagion in Sus scrofa, as it was more likely that pigs yawned when perceiving rather than not perceiving (yawning/control condition) others’ yawns (response peak in the first out of three minutes). Yawn contagion was more likely: (1) in response to males’ yawns; (2) as the age increased; (3) within short distance (1 m); (4) between full siblings, with no significant association between kinship and distance. The influence of kinship suggests that—as also hypothesized for Homo sapiens—yawn contagion might be linked with emotional communication and possibly contagion.
Tipologia CRIS:
03A-Articolo su Rivista
Keywords:
yawn contagion, emotional contagion, empathy, comparative psychology, domestication, socio-emotional communication
Elenco autori:
Ivan Norscia, Elisabetta Coco, Carlo Robino, Elena Chierto, Giada Cordoni
Autori di Ateneo:
CORDONI Giada
NORSCIA Ivan
ROBINO Carlo
Link alla scheda completa:
https://iris.unito.it/handle/2318/1767870
Link al Full Text:
https://iris.unito.it/retrieve/handle/2318/1767870/696295/yawn_contagion_pig.pdf
Pubblicato in:
SCIENTIFIC REPORTS
Journal
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URL

https://www.nature.com/articles/s41598-020-80545-1
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