Alice Galotti, Martina Romano, Paolo Baragli, Elisabetta Palagi
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Yawning In Sync: Implications For Social Cohesion In Horses
The increasing interest in the study of spontaneous (SY) and contagious yawning (CY) was so far focussed on several taxa, especially primates. Here, we focused on SY and CY in horses, a suitable species due to their complex social dynamics that has been largely overlooked in research on these phenomena. By analysing videos of 48 horses on pasture, we identified two yawning morphologies: Covered (YCT) and Uncovered Teeth (YUCT). Using EquiFACS, we quantitatively demonstrated that YCT and YUCT differ in terms of muscle recruitment. Moreover, we provide the first evidence for the presence of CY by comparing two different conditions: chewing-yawn-chewing versus chewing-chewing-chewing. Supporting the Social Modulation hypothesis, in our mares, CY was more prominent among subjects sharing good relationships. Moreover, subjects responded more rapidly to kin compared to non-kin and kin frequently grooming each other responded even more rapidly to each other yawns. The high familiar yawn sensitivity can provide selective advantages increasing behavioural synchronization and group cohesion.
Current ZoologyAgricultural and Biological Sciences-Animal Science and Zoology
CiteScore
3.20
自引率
9.10%
发文量
111
审稿时长
6 weeks
期刊介绍:
About the Journal
Current Zoology (formerly Acta Zoologica Sinica, founded in 1935) is an open access, bimonthly, peer-reviewed international journal of zoology. It publishes review articles and research papers in the fields of ecology, evolution and behaviour.
Current Zoology is sponsored by Institute of Zoology, Chinese Academy of Sciences, along with the China Zoological Society.