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Dominance style is a key predictor of vocal use and evolution across nonhuman primates.

ABSTRACT: Animal communication has long been thought to be subject to pressures and constraints associated with social relationships. However, our understanding of how the nature and quality of social relationships relates to the use and evolution of communication is limited by a lack of directly comparable methods across multiple levels of analysis. Here, we analysed observational data from 111 wild groups belonging to 26 non-human primate species, to test how vocal communication relates to dominance style (the strictness with which a dominance hierarchy is enforced, ranging from 'despotic' to 'tolerant'). At the individual-level, we found that dominant individuals who were more tolerant vocalized at a higher rate than their despotic counterparts. This indicates that tolerance within a relationship may place pressure on the dominant partner to communicate more during social interactions. At the species-level, however, despotic species exhibited a larger repertoire of hierarchy-related vocalizations than their tolerant counterparts. Findings suggest primate signals are used and evolve in tandem with the nature of interactions that characterize individuals' social relationships.

SUBMITTER: Kavanagh E

PROVIDER: S-EPMC8316807 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature

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Dominance style is a key predictor of vocal use and evolution across nonhuman primates.

Kavanagh Eithne E Street Sally E SE Angwela Felix O FO Bergman Thore J TJ Blaszczyk Maryjka B MB Bolt Laura M LM Briseño-Jaramillo Margarita M Brown Michelle M Chen-Kraus Chloe C Clay Zanna Z Coye Camille C Thompson Melissa Emery ME Estrada Alejandro A Fichtel Claudia C Fruth Barbara B Gamba Marco M Giacoma Cristina C Graham Kirsty E KE Green Samantha S Grueter Cyril C CC Gupta Shreejata S Gustison Morgan L ML Hagberg Lindsey L Hedwig Daniela D Jack Katharine M KM Kappeler Peter M PM King-Bailey Gillian G Kuběnová Barbora B Lemasson Alban A Inglis David MacGregor DM Machanda Zarin Z MacIntosh Andrew A Majolo Bonaventura B Marshall Sophie S Mercier Stephanie S Micheletta Jérôme J Muller Martin M Notman Hugh H Ouattara Karim K Ostner Julia J Pavelka Mary S M MSM Peckre Louise R LR Petersdorf Megan M Quintero Fredy F Ramos-Fernández Gabriel G Robbins Martha M MM Salmi Roberta R Schamberg Isaac I Schülke Oliver O Semple Stuart S Silk Joan B JB Sosa-Lopéz J Roberto JR Torti Valeria V Valente Daria D Ventura Raffaella R van de Waal Erica E Weyher Anna H AH Wilke Claudia C Wrangham Richard R Young Christopher C Zanoli Anna A Zuberbühler Klaus K Lameira Adriano R AR Slocombe Katie K

Royal Society open science 20210728 7

Animal communication has long been thought to be subject to pressures and constraints associated with social relationships. However, our understanding of how the nature and quality of social relationships relates to the use and evolution of communication is limited by a lack of directly comparable methods across multiple levels of analysis. Here, we analysed observational data from 111 wild groups belonging to 26 non-human primate species, to test how vocal communication relates to dominance sty ...[more]

PMID: 34350023

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Project description:BackgroundIn terms of structure and function, the skull is one of the most complicated organs in the body. It is also one of the most important parts in terms of developmental and evolutionary origins. This complexity makes it difficult to obtain evolutionary assessments if, as is usually the case with fossils, only part of the skull is available. For this reason this study involves a set of comparisons whereby the smallest functional units are studied first, and these built up, through a triple-nested hierarchical design, into more complex anatomical regions and eventually into the skull-as-a-whole. This design has been applied to macaques (Macaca) in order to reveal patterns of variation at the different levels. The profiles of such variation have been obtained both within and between species. This has lead to a search for the skull parts that have undergone similar selection pressures during evolution and comparable development patterns in both ontogeny and phylogeny.ResultsMorphometric analysis (Principal Components) was used to obtain these profiles of species and sex separations based on 77 cranial variables from 11 species of macaques. The results showed that 7 functional units could be aggregated into three functionally reasonable anatomical regions on the basis of similarities in profiles. These were: the masticatory apparatus containing mandible, lower teeth and upper teeth, the face as a whole combining maxilla (actually lower face) and upper face, and the cranium as a whole involving cranium and calvaria. Twenty-six variables were finally selected for analyzing the morphology of the whole skull. This last showed an overall profile similar to that revealed in the masticatory apparatus but also contained additional information pertaining to individual species and species-groups separations.ConclusionsThe study provides a model for carrying out analysis of species separations and sex variation simultaneously. Through this design it seems possible to see cranio-dental elements that may result from similar developmental processes, have similar functional adaptations, and show an appropriately integrated structure morphologically. This study also implies that the biological information drawn from part of skull alone, e.g. as in studies of incomplete fossils may provide misleading information.

Dataset Information

Dominance style is a key predictor of vocal use and evolution across nonhuman primates.

Publications

Dominance style is a key predictor of vocal use and evolution across nonhuman primates.

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