Facial expressivity in dominant macaques is linked to group cohesion

Whitehouse, J ORCID: https://orcid.org/0000-0003-2607-5492, Clark, PR, Robinson, RL, Rees, K, O’Callaghan, O, Kimock, CM ORCID: https://orcid.org/0000-0001-9560-7427, Witham, CL and Waller, BM ORCID: https://orcid.org/0000-0001-6303-7458, 2024. Facial expressivity in dominant macaques is linked to group cohesion. Proceedings of the Royal Society B: Biological Sciences, 291 (2027): 20240984. ISSN 0962-8452

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Abstract

Social living affords primates (including humans) many benefits. Communication has been proposed to be the key mechanism used to bond social connections, which could explain why primates have evolved such expressive faces. We assessed whether the facial expressivity of the dominant male (quantified from the coding of anatomically based facial movement) was related to social network properties (based on social proximity and grooming) in nine groups of captive rhesus macaques (Macaca mulatta) housed in uniform physical and social environments. More facially expressive dominant male macaques were more socially connected and had more cohesive social groups. These findings show that inter-individual differences in facial expressivity are related to differential social outcomes at both an individual and group level. More expressive individuals occupy more beneficial social positions, which could help explain the selection for complex facial communication in primates.

Item Type:	Journal article
Publication Title:	Proceedings of the Royal Society B: Biological Sciences
Creators:	Whitehouse, J., Clark, P.R., Robinson, R.L., Rees, K., O’Callaghan, O., Kimock, C.M., Witham, C.L. and Waller, B.M.
Publisher:	The Royal Society
Date:	August 2024
Volume:	291
Number:	2027
ISSN:	0962-8452
Identifiers:	Number Type 10.1098/rspb.2024.0984 DOI 39013427 PubMed ID 1915685 Other
Rights:	Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.
Divisions:	Schools > School of Social Sciences
Record created by:	Jonathan Gallacher
Date Added:	05 Sep 2024 14:40
Last Modified:	05 Sep 2024 14:41
URI:	https://irep.ntu.ac.uk/id/eprint/52174

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