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Bousquet CAH, Sueur C, King AJ, O'Bryan LR. Individual and ecological heterogeneity promote complex communication in social vertebrate group decisions. Philos Trans R Soc Lond B Biol Sci 2024; 379:20230204. [PMID: 38768211 PMCID: PMC11391315 DOI: 10.1098/rstb.2023.0204] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 12/08/2023] [Accepted: 03/04/2024] [Indexed: 05/22/2024] Open
Abstract
To receive the benefits of social living, individuals must make effective group decisions that enable them to achieve behavioural coordination and maintain cohesion. However, heterogeneity in the physical and social environments surrounding group decision-making contexts can increase the level of difficulty social organisms face in making decisions. Groups that live in variable physical environments (high ecological heterogeneity) can experience barriers to information transfer and increased levels of ecological uncertainty. In addition, in groups with large phenotypic variation (high individual heterogeneity), individuals can have substantial conflicts of interest regarding the timing and nature of activities, making it difficult for them to coordinate their behaviours or reach a consensus. In such cases, active communication can increase individuals' abilities to achieve coordination, such as by facilitating the transfer and aggregation of information about the environment or individual behavioural preferences. Here, we review the role of communication in vertebrate group decision-making and its relationship to heterogeneity in the ecological and social environment surrounding group decision-making contexts. We propose that complex communication has evolved to facilitate decision-making in specific socio-ecological contexts, and we provide a framework for studying this topic and testing related hypotheses as part of future research in this area. This article is part of the theme issue 'The power of sound: unravelling how acoustic communication shapes group dynamics'.
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Affiliation(s)
- Christophe A. H. Bousquet
- Department of Psychology, University of Konstanz, Konstanz78457, Germany
- Centre for the Advanced Study of Collective Behaviour, University of Konstanz, Konstanz78457, Germany
| | - Cédric Sueur
- Institut pluridisciplinaire Hubert Curien, Strasbourg67000, France
- Institut Universitaire de France, Paris75005, France
| | - Andrew J. King
- Biosciences, Faculty of Science and Engineering, SwanseaSA2 8PP, UK
| | - Lisa R. O'Bryan
- Department of Psychological Sciences, Rice University, Houston, TX77005, USA
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2
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Walsh SL, Townsend SW, Engesser S, Ridley AR. Call combination production is linked to the social environment in Western Australian magpies ( Gymnorhina tibicen dorsalis). Philos Trans R Soc Lond B Biol Sci 2024; 379:20230198. [PMID: 38768205 PMCID: PMC11391283 DOI: 10.1098/rstb.2023.0198] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 02/21/2024] [Accepted: 04/04/2024] [Indexed: 05/22/2024] Open
Abstract
It has recently become clear that some language-specific traits previously thought to be unique to humans (such as the capacity to combine sounds) are widespread in the animal kingdom. Despite the increase in studies documenting the presence of call combinations in non-human animals, factors promoting this vocal trait are unclear. One leading hypothesis proposes that communicative complexity co-evolved with social complexity owing to the need to transmit a diversity of information to a wider range of social partners. The Western Australian magpie (Gymnorhina tibicen dorsalis) provides a unique model to investigate this proposed link because it is a group-living, vocal learning species that is capable of multi-level combinatoriality (independently produced calls contain vocal segments and comprise combinations). Here, we compare variations in the production of call combinations across magpie groups ranging in size from 2 to 11 birds. We found that callers in larger groups give call combinations: (i) in greater diversity and (ii) more frequently than callers in smaller groups. Significantly, these observations support the hypothesis that combinatorial complexity may be related to social complexity in an open-ended vocal learner, providing an important step in understanding the role that sociality may have played in the development of vocal combinatorial complexity. This article is part of the theme issue 'The power of sound: unravelling how acoustic communication shapes group dynamics'.
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Affiliation(s)
- Sarah L Walsh
- Centre for Evolutionary Biology, School of Biological Sciences, University of Western Australia , Crawley, Western Australia 6008, Australia
| | - Simon W Townsend
- Department of Evolutionary Anthropology, University of Zurich , Zurich 8032, Switzerland
- Center for the Interdisciplinary Study of Language Evolution (ISLE), University of Zurich , Zurich 8032, Switzerland
- Department of Psychology, University of Warwick , Coventry CV4 7AL, UK
| | - Sabrina Engesser
- Department of Biology, University of Copenhagen , Kobenhavn 2100, Denmark
| | - Amanda R Ridley
- Centre for Evolutionary Biology, School of Biological Sciences, University of Western Australia , Crawley, Western Australia 6008, Australia
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3
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Fichtel C, Dinter K, Ratsoavina F. Benefits but not the dual functions of submissive signals differ between two Malagasy primates. Philos Trans R Soc Lond B Biol Sci 2024; 379:20230197. [PMID: 38768209 PMCID: PMC11391313 DOI: 10.1098/rstb.2023.0197] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Revised: 01/21/2024] [Accepted: 03/05/2024] [Indexed: 05/22/2024] Open
Abstract
Many animals use formalized signals to communicate dominance relationships. In some primates, such as macaques, the function of such signals varies with dominance style. Despotic species produce unidirectional submission signals that have a dual function: in conflict contexts, they signal a willingness to withdraw, whereas in peaceful contexts, they indicate the agreement to subordination. More despotic species produce these calls to a lesser extent than less despotic species. Here, we investigated whether the use of unidirectional submission signals is also related to dominance style in two lemur species and whether signalling subordination stabilizes social relationships at the group level. Ring-tailed lemurs (Lemur catta) exhibit a more despotic dominance hierarchy than Verreaux's sifakas (Propithecus verreauxi). We observed social interactions in 75 dyads of Verreaux's sifakas and 118 dyads of ring-tailed lemurs. Both species used unidirectional submissive calls that have a dual function, potentially suggesting convergent evolution of the function of these signals in independent primate lineages. However, signalling subordination did not stabilize social relationships at the group level in both species. Additionally, subordination occurred more frequently in dyads of the more despotic ring-tailed lemurs than in Verreaux's sifakas, indicating opposite patterns to macaques in the coevolution of social traits with dominance style. This article is part of the theme issue 'The power of sound: unravelling how acoustic communication shapes group dynamics'.
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Affiliation(s)
- Claudia Fichtel
- Behavioral Ecology and Sociobiology Unit, German Primate Center, Leibniz Institute for Primate Research , Göttingen 37077, Germany
| | - Klara Dinter
- Behavioral Ecology and Sociobiology Unit, German Primate Center, Leibniz Institute for Primate Research , Göttingen 37077, Germany
| | - Fanomezana Ratsoavina
- Mention Zoologie et Biodiversité Animale, Université d'Antananarivo , Antananarivo, Madagascar
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Paulet J, Molina A, Beltzung B, Suzumura T, Yamamoto S, Sueur C. Deep learning for automatic facial detection and recognition in Japanese macaques: illuminating social networks. Primates 2024; 65:265-279. [PMID: 38758427 DOI: 10.1007/s10329-024-01137-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Accepted: 05/07/2024] [Indexed: 05/18/2024]
Abstract
Individual identification plays a pivotal role in ecology and ethology, notably as a tool for complex social structures understanding. However, traditional identification methods often involve invasive physical tags and can prove both disruptive for animals and time-intensive for researchers. In recent years, the integration of deep learning in research has offered new methodological perspectives through the automatisation of complex tasks. Harnessing object detection and recognition technologies is increasingly used by researchers to achieve identification on video footage. This study represents a preliminary exploration into the development of a non-invasive tool for face detection and individual identification of Japanese macaques (Macaca fuscata) through deep learning. The ultimate goal of this research is, using identification done on the dataset, to automatically generate a social network representation of the studied population. The current main results are promising: (i) the creation of a Japanese macaques' face detector (Faster-RCNN model), reaching an accuracy of 82.2% and (ii) the creation of an individual recogniser for the Kōjima Island macaque population (YOLOv8n model), reaching an accuracy of 83%. We also created a Kōjima population social network by traditional methods, based on co-occurrences on videos. Thus, we provide a benchmark against which the automatically generated network will be assessed for reliability. These preliminary results are a testament to the potential of this approach to provide the scientific community with a tool for tracking individuals and social network studies in Japanese macaques.
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Affiliation(s)
- Julien Paulet
- Université Jean Monnet, Saint-Etienne, France
- Wildlife Research Center, Kyoto University, Kyoto, Japan
| | - Axel Molina
- Ecole Normale Supérieure, Université PCL, Paris, France
| | | | | | - Shinya Yamamoto
- Wildlife Research Center, Kyoto University, Kyoto, Japan
- Kyoto University Institute for Advanced Study, Kyoto, Japan
| | - Cédric Sueur
- Université de Strasbourg, IPHC UMR7178, CNRS, Strasbourg, France.
- ANTHROPO-LAB, ETHICS EA 7446, Université Catholique de Lille, Lille, France.
- Institut Universitaire de France, Paris, France.
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Fröhlich M, van Noordwijk MA, Mitra Setia T, van Schaik CP, Knief U. Wild and captive immature orangutans differ in their non-vocal communication with others, but not with their mothers. Behav Ecol Sociobiol 2024; 78:12. [PMID: 38235053 PMCID: PMC10789664 DOI: 10.1007/s00265-023-03426-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 12/20/2023] [Accepted: 12/28/2023] [Indexed: 01/19/2024]
Abstract
Abstract In many group-living species, individuals are required to flexibly modify their communicative behaviour in response to current social challenges. To unravel whether sociality and communication systems co-evolve, research efforts have often targeted the links between social organisation and communicative repertoires. However, it is still unclear which social or interactional factors directly predict communicative complexity. To address this issue, we studied wild and zoo-housed immature orangutans of two species to assess the impact of the socio-ecological setting on the production of non-vocal signal repertoires. Specifically, we compared repertoire size, dyadic repertoire similarity, and number of social goals (i.e. observer's estimate of the signaller's intended interaction outcome) for communicative interactions with mothers versus other conspecifics, controlling for critical individual and environmental factors. In this small sample of immature orangutans, wild-captive contrasts were statistically significant only for other-directed repertoires, but not for mother-directed repertoires, and not for the number of social goals that immatures communicated towards. While the repertoires of individuals living in the same research setting were more similar than those living in contrasting settings, this difference was most pronounced for other-directed repertoires of the less socially tolerant orangutan species. These results suggest that the boosted interactional opportunities in captivity rather than mere differences in environmental affordances or communicative needs drive the wild-captive contrast in orangutan communicative repertoires. Overall, this fine-grained analysis of repertoires further underscores that not only a species' social organisation but also the targeted audience may have a profound impact on communicative behaviour. Significance statement Navigating a dynamic social environment often requires flexible signal use. While it has repeatedly been shown that the social organisation and structure of species predict the complexity of their communication systems, the mechanisms underlying these relationships are largely unknown. Because targeted studies to assess this issue in great apes are difficult, we take an alternative approach here: we compare the same species living in the wild and in artificial habitats in captivity. This contrast allows a direct test of how repertoires respond to the relevant difference in socio-ecological conditions. Our results show that the diversity of interaction partners (i.e. social opportunities), but not the diversity of social goals (i.e. possible interaction outcomes) or the broader physical opportunities (i.e. safe ground use), predict the size and consistency of wild and captive signalling repertoires. Supplementary Information The online version contains supplementary material available at 10.1007/s00265-023-03426-3.
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Affiliation(s)
- Marlen Fröhlich
- Palaeoanthropology, Institute for Archaeological Sciences, Department of Geosciences, University of Tübingen, Tübingen, Germany
- Department of Evolutionary Anthropology, University of Zurich, Zurich, Switzerland
| | - Maria A. van Noordwijk
- Department of Evolutionary Anthropology, University of Zurich, Zurich, Switzerland
- Comparative Socioecology Research Group, Max Planck Institute of Animal Behavior, Konstanz, Germany
| | - Tatang Mitra Setia
- Fakultas Biologi, Universitas Nasional, 12520 Jakarta Selatan, Indonesia
| | - Carel P. van Schaik
- Department of Evolutionary Anthropology, University of Zurich, Zurich, Switzerland
- Comparative Socioecology Research Group, Max Planck Institute of Animal Behavior, Konstanz, Germany
- Center for the Interdisciplinary Study of Language Evolution (ISLE), University of Zurich, Zurich, Switzerland
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, Zurich, Switzerland
| | - Ulrich Knief
- Evolutionary Biology and Ecology, Faculty of Biology, University of Freiburg, Freiburg, Germany
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Martin K, Cornero FM, Clayton NS, Adam O, Obin N, Dufour V. Vocal complexity in a socially complex corvid: gradation, diversity and lack of common call repertoire in male rooks. ROYAL SOCIETY OPEN SCIENCE 2024; 11:231713. [PMID: 38204786 PMCID: PMC10776222 DOI: 10.1098/rsos.231713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Accepted: 12/08/2023] [Indexed: 01/12/2024]
Abstract
Vocal communication is widespread in animals, with vocal repertoires of varying complexity. The social complexity hypothesis predicts that species may need high vocal complexity to deal with complex social organization (e.g. have a variety of different interindividual relations). We quantified the vocal complexity of two geographically distant captive colonies of rooks, a corvid species with complex social organization and cognitive performances, but understudied vocal abilities. We quantified the diversity and gradation of their repertoire, as well as the inter-individual similarity at the vocal unit level. We found that males produced call units with lower diversity and gradation than females, while song units did not differ between sexes. Surprisingly, while females produced highly similar call repertoires, even between colonies, each individual male produced almost completely different call repertoires from any other individual. These findings question the way male rooks communicate with their social partners. We suggest that each male may actively seek to remain vocally distinct, which could be an asset in their frequently changing social environment. We conclude that inter-individual similarity, an understudied aspect of vocal repertoires, should also be considered as a measure of vocal complexity.
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Affiliation(s)
- Killian Martin
- PRC, UMR 7247, Ethologie Cognitive et Sociale, CNRS-IFCE-INRAE-Université de Tours, Strasbourg, France
| | | | | | - Olivier Adam
- Institut Jean Le Rond d'Alembert, UMR 7190, CNRS-Sorbonne Université, 75005 Paris, France
- Institut des Neurosciences Paris-Saclay, UMR 9197, CNRS-Université Paris Sud, Orsay, France
| | - Nicolas Obin
- STMS Lab, IRCAM, CNRS-Sorbonne Université, Paris, France
| | - Valérie Dufour
- PRC, UMR 7247, Ethologie Cognitive et Sociale, CNRS-IFCE-INRAE-Université de Tours, Strasbourg, France
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7
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Grampp M, Samuni L, Girard-Buttoz C, León J, Zuberbühler K, Tkaczynski P, Wittig RM, Crockford C. Social uncertainty promotes signal complexity during approaches in wild chimpanzees ( Pan troglodytes verus) and mangabeys ( Cercocebus atys atys). ROYAL SOCIETY OPEN SCIENCE 2023; 10:231073. [PMID: 38034119 PMCID: PMC10685125 DOI: 10.1098/rsos.231073] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Accepted: 11/09/2023] [Indexed: 12/02/2023]
Abstract
The social complexity hypothesis for the evolution of communication posits that complex social environments require greater communication complexity for individuals to effectively manage their relationships. We examined how different socially uncertain contexts, reflecting an increased level of social complexity, relate to variation in signalling within and between two species, which display varying levels of fission-fusion dynamics (sympatric-living chimpanzees and sooty mangabeys, Taï National Park, Ivory Coast). Combined signalling may improve message efficacy, notably when involving different perception channels, thus may increase in moments of high social uncertainty. We examined the probability of individuals to emit no signal, single or multisensory or combined (complex) signals, during social approaches which resulted in non-agonistic outcomes. In both species, individuals were more likely to use more combined and multisensory signals in post-conflict approaches with an opponent than in other contexts. The clearest impact of social uncertainty on signalling complexity was observed during chimpanzee fusions, where the likelihood of using complex signals tripled relative to other contexts. Overall, chimpanzees used more multisensory signals than mangabeys. Social uncertainty may shape detected species differences in variation in signalling complexity, thereby supporting the hypothesis that social complexity, particularly associated with high fission-fusion dynamics, promotes signalling complexity.
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Affiliation(s)
- Mathilde Grampp
- The Ape Social Mind Laboratory, Institut des Sciences Cognitives, CNRS UMR 5229, Bron, France
- Department of Human Behaviour, Ecology and Culture, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
- Taï Chimpanzee Project, Centre Suisse de Recherches Scientifiques, Abidjan, Côte d'Ivoire
| | - Liran Samuni
- Taï Chimpanzee Project, Centre Suisse de Recherches Scientifiques, Abidjan, Côte d'Ivoire
- Department of Human Evolutionary Biology, Harvard University, Cambridge, MA, USA
- School of Psychology and Neuroscience, University of St Andrews, St Andrews, UK
- Cooperative Evolution Laboratory, German Primate Center, Göttingen, Germany
| | - Cédric Girard-Buttoz
- The Ape Social Mind Laboratory, Institut des Sciences Cognitives, CNRS UMR 5229, Bron, France
- Department of Human Behaviour, Ecology and Culture, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
- Taï Chimpanzee Project, Centre Suisse de Recherches Scientifiques, Abidjan, Côte d'Ivoire
| | - Julián León
- Taï Monkey Project, Centre Suisse de Recherches Scientifiques, Abidjan, Côte d'Ivoire
- Institute of Biology, University of Neuchâtel, Neuchatel, Switzerland
| | - Klaus Zuberbühler
- Taï Monkey Project, Centre Suisse de Recherches Scientifiques, Abidjan, Côte d'Ivoire
- Institute of Biology, University of Neuchâtel, Neuchatel, Switzerland
| | - Patrick Tkaczynski
- Taï Chimpanzee Project, Centre Suisse de Recherches Scientifiques, Abidjan, Côte d'Ivoire
- School of Biological & Environmental Sciences, Liverpool John Moores University, Liverpool, UK
| | - Roman M. Wittig
- The Ape Social Mind Laboratory, Institut des Sciences Cognitives, CNRS UMR 5229, Bron, France
- Department of Human Behaviour, Ecology and Culture, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
- Taï Chimpanzee Project, Centre Suisse de Recherches Scientifiques, Abidjan, Côte d'Ivoire
| | - Catherine Crockford
- The Ape Social Mind Laboratory, Institut des Sciences Cognitives, CNRS UMR 5229, Bron, France
- Department of Human Behaviour, Ecology and Culture, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
- Taï Chimpanzee Project, Centre Suisse de Recherches Scientifiques, Abidjan, Côte d'Ivoire
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Thierry B. Studying the Tonkean macaques of Strasbourg, a tale full of sound and fury. Primates 2023; 64:559-572. [PMID: 37597117 DOI: 10.1007/s10329-023-01088-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Accepted: 08/08/2023] [Indexed: 08/21/2023]
Abstract
In this paper, I chronicle the Strasbourg population of Tonkean macaques (Macaca tonkeana) over a period of half a century. In 1972, Tonkean macaques were imported from Sulawesi, Indonesia, to eastern France, leading to the establishment of two social groups in the Strasbourg region several years later. Our research team studied the social behavior and cognitive abilities of these Tonkean macaques for four decades. The species is characterized by a high degree of social tolerance. This has proven to be very informative in comparative studies of macaque social behavior, opening a new perspective on the evolution of primate societies. Over the years, the population has grown, and more social groups have been formed. However, the fact that some of the Tonkean macaques were healthy carriers of the herpes B virus led to disagreements over their management and eventually to the elimination of the positive individuals. Many individuals from the Strasbourg population are now kept in sanctuaries, and the number of captive breeding groups is limited. We still have much to learn about Tonkean macaques and there is a need for studies carried out in their native habitat in Sulawesi.
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Affiliation(s)
- Bernard Thierry
- Laboratoire de Psychologie Sociale et Cognitive, Centre National de la Recherche Scientifique, Université Clermont Auvergne, Clermont-Ferrand, France.
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Rincon AV, Waller BM, Duboscq J, Mielke A, Pérez C, Clark PR, Micheletta J. Higher social tolerance is associated with more complex facial behavior in macaques. eLife 2023; 12:RP87008. [PMID: 37787008 PMCID: PMC10547472 DOI: 10.7554/elife.87008] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023] Open
Abstract
The social complexity hypothesis for communicative complexity posits that animal societies with more complex social systems require more complex communication systems. We tested the social complexity hypothesis on three macaque species that vary in their degree of social tolerance and complexity. We coded facial behavior in >3000 social interactions across three social contexts (aggressive, submissive, affiliative) in 389 animals, using the Facial Action Coding System for macaques (MaqFACS). We quantified communicative complexity using three measures of uncertainty: entropy, specificity, and prediction error. We found that the relative entropy of facial behavior was higher for the more tolerant crested macaques as compared to the less tolerant Barbary and rhesus macaques across all social contexts, indicating that crested macaques more frequently use a higher diversity of facial behavior. The context specificity of facial behavior was higher in rhesus as compared to Barbary and crested macaques, demonstrating that Barbary and crested macaques used facial behavior more flexibly across different social contexts. Finally, a random forest classifier predicted social context from facial behavior with highest accuracy for rhesus and lowest for crested, indicating there is higher uncertainty and complexity in the facial behavior of crested macaques. Overall, our results support the social complexity hypothesis.
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Affiliation(s)
- Alan V Rincon
- Department of Psychology, Centre for Comparative and Evolutionary Psychology, University of PortsmouthPortsmouthUnited Kingdom
| | - Bridget M Waller
- Centre for Interdisciplinary Research on Social Interaction, Department of Psychology, Nottingham Trent UniversityNottinghamUnited Kingdom
| | | | - Alexander Mielke
- School of Biological and Behavioural Sciences, Queen Mary University of LondonLondonUnited Kingdom
| | - Claire Pérez
- Department of Psychology, Centre for Comparative and Evolutionary Psychology, University of PortsmouthPortsmouthUnited Kingdom
| | - Peter R Clark
- Department of Psychology, Centre for Comparative and Evolutionary Psychology, University of PortsmouthPortsmouthUnited Kingdom
- School of Psychology, University of LincolnLincolnUnited Kingdom
| | - Jérôme Micheletta
- Department of Psychology, Centre for Comparative and Evolutionary Psychology, University of PortsmouthPortsmouthUnited Kingdom
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10
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Freiler MK, Smith GT. Neuroendocrine mechanisms contributing to the coevolution of sociality and communication. Front Neuroendocrinol 2023; 70:101077. [PMID: 37217079 PMCID: PMC10527162 DOI: 10.1016/j.yfrne.2023.101077] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 04/19/2023] [Accepted: 05/15/2023] [Indexed: 05/24/2023]
Abstract
Communication is inherently social, so signaling systems should evolve with social systems. The 'social complexity hypothesis' posits that social complexity necessitates communicative complexity and is generally supported in vocalizing mammals. This hypothesis, however, has seldom been tested outside the acoustic modality, and comparisons across studies are confounded by varying definitions of complexity. Moreover, proximate mechanisms underlying coevolution of sociality and communication remain largely unexamined. In this review, we argue that to uncover how sociality and communication coevolve, we need to examine variation in the neuroendocrine mechanisms that coregulate social behavior and signal production and perception. Specifically, we focus on steroid hormones, monoamines, and nonapeptides, which modulate both social behavior and sensorimotor circuits and are likely targets of selection during social evolution. Lastly, we highlight weakly electric fishes as an ideal system in which to comparatively address the proximate mechanisms underlying relationships between social and signal diversity in a novel modality.
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Affiliation(s)
- Megan K Freiler
- Department of Biology, Indiana University, Bloomington, IN, United States; Center for the Integrative Study of Animal Behavior, Indiana University, Bloomington, IN, United States.
| | - G Troy Smith
- Department of Biology, Indiana University, Bloomington, IN, United States; Center for the Integrative Study of Animal Behavior, Indiana University, Bloomington, IN, United States
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Schel AM, Bono A, Aychet J, Pika S, Lemasson A. Intentional gestural communication amongst red-capped mangabeys (Cercocebus torquatus). Anim Cogn 2022; 25:1313-1330. [PMID: 35362785 PMCID: PMC9617956 DOI: 10.1007/s10071-022-01615-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2020] [Revised: 01/26/2022] [Accepted: 03/16/2022] [Indexed: 11/29/2022]
Abstract
Apes, human's closest living relatives, are renowned for their intentional and highly flexible use of gestural communication. In stark contrast, evidence for flexible and intentional gestural communication in monkeys is scarce. Here, we investigated the intentionality and flexibility of spontaneous gesture use in red-capped mangabeys (Cercocebus torquatus). We applied established methods used in ape gesture research to analyse whether the body acts produced by a total of 17 individuals living in three different groups in captivity qualified as intentionally produced gesture instances. Results showed that signallers showed all hallmarks of intentionality during the production of 20 out of a total of 21 different types of body acts. These were only produced in the presence of other individuals, and the monkeys showed audience checking, sensitivity to the attentional states of recipients, adjustment of signal modality, and response waiting relative to their production. Moreover, in case of communication failure, the monkeys showed goal persistence, and regarding the production contexts they showed some signs of means-ends dissociation. Therefore, these monkeys are capable of flexible and intentional gestural communication and use this to communicate with conspecifics. Our results corroborate recent findings showing that intentional gestural communication was already present in the monkey lineage of catarrhine primates. We discuss our results in light of the comparative approach towards human language evolution and highlight our finding that these monkeys also showed flexible and intentional use of four 'free' manual gesture types.
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Affiliation(s)
- Anne Marijke Schel
- Animal Behaviour and Cognition, Utrecht University, Padualaan 8, 3584 CH, Utrecht, The Netherlands.
| | - Axelle Bono
- Université de Rennes, Normandie Université, CNRS, EthoS (Éthologie Animale et Humaine), UMR 6552, 35000, Rennes, France
- Department of Ecology and Evolution, Universite de Lausanne, Biophore, 1015, Lausanne, Switzerland
| | - Juliette Aychet
- Université de Rennes, Normandie Université, CNRS, EthoS (Éthologie Animale et Humaine), UMR 6552, 35000, Rennes, France
| | - Simone Pika
- Comparative BioCognition, Institute of Cognitive Science, University of Osnabrück, 49076, Osnabrück, Germany
| | - Alban Lemasson
- Université de Rennes, Normandie Université, CNRS, EthoS (Éthologie Animale et Humaine), UMR 6552, 35000, Rennes, France
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12
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Briseño-Jaramillo M, Sosa-López JR, Ramos-Fernández G, Lemasson A. Flexible use of contact calls in a species with high fission-fusion dynamics. Philos Trans R Soc Lond B Biol Sci 2022; 377:20210309. [PMID: 35934970 PMCID: PMC9358324 DOI: 10.1098/rstb.2021.0309] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Accepted: 05/05/2022] [Indexed: 01/13/2023] Open
Abstract
The 'social complexity hypothesis' posits that complex social systems (which entail high uncertainty) require complex communicative systems (with high vocal flexibility). In species with fission-fusion dynamics, where the fluid composition of temporary subgroups increases the uncertainty with which group members must manage their social relationships, vocal communication must be particularly flexible. This study assessed whether contact call rates vary with caller and audience characteristics in free-living spider monkeys, as well as with fission and fusion events. Adult females and immature individuals called more when in small audience settings, while audience size did not influence adult males. Adults called more when in the presence of the opposite sex, whereas immatures vocalized more in subgroups composed only by females. Females also called more when with their mature sons. We found higher call rates in periods during which fission and fusion events took place than in periods with more stable compositions and when the composition after a fission or fusion event changed from one sex to two sexes. A flexible use of contact calls allows individuals to identify themselves when they join others, particularly if they are members of the opposite sex. This socio-spatial cohesion function reduces the uncertainty about subgroup composition. This article is part of the theme issue 'Cognition, communication and social bonds in primates'.
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Affiliation(s)
| | - José Roberto Sosa-López
- Centro Interdisciplinario de Investigación para el Desarrollo Integral Regional Unidad Oaxaca (CIIDIR), Instituto Politécnico Nacional, Oaxaca, México
| | - Gabriel Ramos-Fernández
- Instituto de Investigaciones en Matemáticas Aplicadas y en Sistemas, Instituto Politécnico Nacional, Oaxaca, México
- Centro de Ciencias de la Complejidad, Universidad Nacional Autónoma de México, Ciudad de México, México
| | - Alban Lemasson
- Univ Rennes, Normandie Univ, CNRS, Ethologie Animale et Humaine, U.M.R. 6552 - EthoS, Rennes 35000, France
- Institut Universitaire de France, Paris, France
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13
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Fichtel C, Kappeler PM. Coevolution of social and communicative complexity in lemurs. Philos Trans R Soc Lond B Biol Sci 2022; 377:20210297. [PMID: 35934963 DOI: 10.1098/rstb.2021.0297] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The endemic lemurs of Madagascar (Lemuriformes: Primates) exhibit great social and communicative diversity. Given their independent evolutionary history, lemurs provide an excellent opportunity to identify fundamental principles in the coevolution of social and communicative traits. We conducted comparative phylogenetic analyses to examine patterns of interspecific variation among measures of social complexity and repertoire sizes in the vocal, olfactory and visual modality, while controlling for environmental factors such as habitat and number of sympatric species. We also examined potential trade-offs in signal evolution as well as coevolution between body mass or brain size and communicative complexity. Repertoire sizes in the vocal, olfactory and visual modality correlated positively with group size, but not with environmental factors. Evolutionary changes in social complexity presumably antedated corresponding changes in communicative complexity. There was no trade-off in the evolution of signals in different modalities and neither body mass nor brain size correlated with any repertoire size. Hence, communicative complexity coevolved with social complexity across different modalities, possibly to service social relationships flexibly and effectively in pair- and group-living species. Our analyses shed light on the requirements and adaptive possibilities in the coevolution of core elements of social organization and social structure in a basal primate lineage. This article is part of the theme issue 'Cognition, communication and social bonds in primates'.
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Affiliation(s)
- Claudia Fichtel
- Behavioral Ecology and Sociobiology Unit, German Primate Center, Leibniz Institute for Primate Research, Kellnerweg 4, Göttingen 37077, Germany.,Leibniz-ScienceCampus Primate Cognition, Kellnerweg 4, 37077 Göttingen, Germany.,Department Anthropology/Sociobiology, University of Göttingen, Kellnerweg 6, 37077 Göttingen, Germany
| | - Peter M Kappeler
- Behavioral Ecology and Sociobiology Unit, German Primate Center, Leibniz Institute for Primate Research, Kellnerweg 4, Göttingen 37077, Germany.,Leibniz-ScienceCampus Primate Cognition, Kellnerweg 4, 37077 Göttingen, Germany.,Department Anthropology/Sociobiology, University of Göttingen, Kellnerweg 6, 37077 Göttingen, Germany
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14
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Fröhlich M, van Schaik CP. Social tolerance and interactional opportunities as drivers of gestural redoings in orang-utans. Philos Trans R Soc Lond B Biol Sci 2022; 377:20210106. [PMID: 35876198 PMCID: PMC9310174 DOI: 10.1098/rstb.2021.0106] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Accepted: 02/21/2022] [Indexed: 09/14/2023] Open
Abstract
Communicative repair is a fundamental and universal element of interactive language use. It has been suggested that the persistence and elaboration after communicative breakdown in nonhuman primates constitute two evolutionary building blocks of this capacity, but the conditions favouring it are poorly understood. Because zoo-housed individuals of some species are more social and more terrestrial than in the wild, they should be more likely to show gestural redoings (i.e. both repetition and elaboration) after communicative failure in the coordination of their joint activities. Using a large comparative sample of wild and zoo-housed orang-utans of two different species, we could confirm this prediction for elaboration, the more flexible form of redoings. Specifically, results showed that gestural redoings in general were best predicted by the specific social action context (i.e. social play) and interaction dyad (i.e. beyond mother-offspring), although they were least frequent in captive Bornean orang-utans. For gestural elaboration, we found the expected differences between captive and wild research settings in Borneans, but not in Sumatrans (the more socially tolerant species). Moreover, we found that the effectiveness of elaboration in eliciting responses was higher in Sumatrans, especially the captive ones, whereas effectiveness of mere repetition was influenced by neither species nor setting. We conclude that the socio-ecological environment plays a central role in the emergence of communicative repair strategies in great apes. This article is part of the theme issue 'Revisiting the human 'interaction engine': comparative approaches to social action coordination'.
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Affiliation(s)
- Marlen Fröhlich
- Department of Anthropology, University of Zurich, 8057 Zurich, Switzerland
- Paleoanthropology, Institute for Archaeological Sciences, Senckenberg Center for Human Evolution and Paleoenvironment, University of Tübingen, 72070 Tübingen, Germany
| | - Carel P. van Schaik
- Department of Anthropology, University of Zurich, 8057 Zurich, Switzerland
- Center for the Interdisciplinary Study of Language Evolution (ISLE), University of Zurich, 8050 Zurich, Switzerland
- Comparative Socioecology Research Group, Max Planck Institute of Animal Behavior, 78467 Konstanz, Germany
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15
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Leroux M, Chandia B, Bosshard AB, Zuberbühler K, Townsend SW. Call combinations in chimpanzees: a social tool? Behav Ecol 2022. [DOI: 10.1093/beheco/arac074] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
A growing body of evidence suggests the capacity for animals to combine calls into larger communicative structures is more common than previously assumed. Despite its cross-taxa prevalence, little is known regarding the evolutionary pressures driving such combinatorial abilities. One dominant hypothesis posits that social complexity and vocal complexity are linked, with changes in social structuring (e.g., group size) driving the emergence of ever-more complex vocal abilities, such as call sequencing. In this paper, we tested this hypothesis through investigating combinatoriality in the vocal system of the highly social chimpanzee. Specifically, we predicted combinatoriality to be more common in socially-driven contexts and in females and lower-ranked males (socially challenging contexts and socially challenged individuals respectively). Firstly, through applying methods from computational linguistics (i.e., collocation analyses), we built an objective repertoire of combinatorial structures in this species. Second, we investigated what potential factors influenced call combination production. We show that combinatoriality is predominant in 1) social contexts vs. non-social contexts, 2) females vs. males, and 3) negatively correlates with male rank. Together, these results suggest one function of combinatoriality in chimpanzees may be to help individuals navigate their dynamic social world. More generally, we argue these findings provide support for the hypothesized link between social and vocal complexity and can provide insight into the evolution of our own highly combinatorial communication system, language.
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Affiliation(s)
- Maël Leroux
- Department of Comparative Language Science, University of Zürich , Affolternstrasse 56, 8050 Zurich , Switzerland
- Budongo Conservation Field Station , Masindi , Uganda
- Center for the Interdisciplinary Study of Language Evolution (ISLE), University of Zürich , Affolternstrasse 56, 8050 Zurich , Switzerland
| | - Bosco Chandia
- Budongo Conservation Field Station , Masindi , Uganda
| | - Alexandra B Bosshard
- Department of Comparative Language Science, University of Zürich , Affolternstrasse 56, 8050 Zurich , Switzerland
- Budongo Conservation Field Station , Masindi , Uganda
| | - Klaus Zuberbühler
- Budongo Conservation Field Station , Masindi , Uganda
- Center for the Interdisciplinary Study of Language Evolution (ISLE), University of Zürich , Affolternstrasse 56, 8050 Zurich , Switzerland
- Department of Comparative Cognition, Institute of Biology, University of Neuchatel , Rue Emile-Argand 11, 2000 Neuchâtel , Switzerland
- School of Psychology and Neuroscience, University of St Andrews , St Mary’s quad, south street, St Andrews, KY16 9JP , UK
| | - Simon W Townsend
- Department of Comparative Language Science, University of Zürich , Affolternstrasse 56, 8050 Zurich , Switzerland
- Center for the Interdisciplinary Study of Language Evolution (ISLE), University of Zürich , Affolternstrasse 56, 8050 Zurich , Switzerland
- Department of Psychology, University of Warwick , University Road, Coventry, CV4 7AL , UK
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16
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Thierry B. Where do we stand with the covariation framework in primate societies? AMERICAN JOURNAL OF BIOLOGICAL ANTHROPOLOGY 2022; 178 Suppl 74:5-25. [PMID: 36787776 DOI: 10.1002/ajpa.24441] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 10/21/2021] [Accepted: 11/04/2021] [Indexed: 12/17/2022]
Abstract
Comparative study of the social systems of macaques has revealed correlated variations between species in multiple social traits such as the asymmetry of dominance relationships, preferential treatment of kin, patterns of aggression and reconciliation, modes of socialization, and access to food resources. Macaques can be classified on a scale of four categories of social styles, ranging from the least to the most tolerant species. This led to the development of the covariation framework, which addresses the constraints responsible for the linkages between social traits, and their consequences on the evolution of primate social systems. Decades of research have provided a wealth of information that supports, complements, expands, or challenges the covariation framework. In this article, I review this body of knowledge and consider covariation in its two aspects, that is, as a pattern and as a hypothesis. I first consider the extent to which social styles can be invariant, the strength of correlations between traits, and the possible extension of the framework to nonhuman primates other than macaques. I then discuss how to formulate hypotheses, identify sources of linkage between traits, make predictions about the effects of social constraints, assess the tolerance dimension of social styles, and consider the breaking of linkages between traits. Whereas socioecological studies aim to understand how adaptation to the ecological environment determines the shape of social systems, the covariation framework is a complementary research program that seeks to unravel the internal processes that restrict or channel change in social behavior.
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Affiliation(s)
- Bernard Thierry
- Physiologie de la Reproduction et des Comportements, Centre National de la Recherche Scientifique, Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement, Université de Tours, Nouzilly, France
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17
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Tolerant and intolerant macaques differ in the context specificity of their calls and how they ‘comment’ on the interactions of others. Behav Ecol Sociobiol 2022. [DOI: 10.1007/s00265-022-03177-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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18
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Coye C, Zuberbühler K, Lemasson A. The Evolution of Vocal Communication: Inertia and Divergence in Two Closely Related Primates. INT J PRIMATOL 2022. [DOI: 10.1007/s10764-022-00294-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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19
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Chen P, Wang J, Miao J, Dong H, Bao J, Wu Y, Zhang F. Female large odorous frogs ( Odorrana graminea) prefer males with higher nonlinear vocal components. Ecol Evol 2022; 12:e8573. [PMID: 35169452 PMCID: PMC8831212 DOI: 10.1002/ece3.8573] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 12/26/2021] [Accepted: 01/10/2022] [Indexed: 11/19/2022] Open
Abstract
In anurans, the complexity of courtship calls may affect female mate choice. The current study suggests that nonlinear phenomena (NLP) components can contribute to increasing complexity in courtship calls and attracting female attention. The results of a recent study showed that calls of large odorous frog (Odorrana graminea) contained NLP components. However, whether the nonlinear components of courtship calls in O. graminea improve male attractiveness remains unknown. We hypothesized that female O. graminea would prefer males producing calls with a higher proportion of NLP components (P-NLP-C). To test this hypothesis, we recorded the advertisement calls of 28 males and confirmed that the P-NLP-C was significantly positively related to body size. We also measured the body size of natural amplectant males and non-amplectant males in the field and found that amplectant males had larger body sizes than non-amplectant males, and the results of two-choice amplexus experiments similarly revealed a female preference for males with larger body sizes. Additionally, phonotaxis experiments also revealed that females preferred male calls with a high P-NLP-C. The results suggest that a higher P-NLP-C in calls can enhance male attractiveness, and the P-NLP-C may provide key information about male body conditions for female O. graminea. Our study provides a new insight for better understanding the role of NLP in anuran mate selection.
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Affiliation(s)
- Pan Chen
- Anhui Provincial Key Laboratory of the Conservation and Exploitation of Biological ResourcesCollege of Life SciencesAnhui Normal UniversityWuhuAnhuiP. R. China
- School of Ecology and EnvironmentAnhui Normal UniversityWuhuAnhuiP. R. China
| | - Jinmei Wang
- Anhui Provincial Key Laboratory of the Conservation and Exploitation of Biological ResourcesCollege of Life SciencesAnhui Normal UniversityWuhuAnhuiP. R. China
| | - Junqi Miao
- Anhui Provincial Key Laboratory of the Conservation and Exploitation of Biological ResourcesCollege of Life SciencesAnhui Normal UniversityWuhuAnhuiP. R. China
| | - Hao Dong
- Anhui Provincial Key Laboratory of the Conservation and Exploitation of Biological ResourcesCollege of Life SciencesAnhui Normal UniversityWuhuAnhuiP. R. China
| | - Jiahui Bao
- Anhui Provincial Key Laboratory of the Conservation and Exploitation of Biological ResourcesCollege of Life SciencesAnhui Normal UniversityWuhuAnhuiP. R. China
| | - Yatao Wu
- Anhui Provincial Key Laboratory of the Conservation and Exploitation of Biological ResourcesCollege of Life SciencesAnhui Normal UniversityWuhuAnhuiP. R. China
| | - Fang Zhang
- Anhui Provincial Key Laboratory of the Conservation and Exploitation of Biological ResourcesCollege of Life SciencesAnhui Normal UniversityWuhuAnhuiP. R. China
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20
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Leongómez JD, Havlíček J, Roberts SC. Musicality in human vocal communication: an evolutionary perspective. Philos Trans R Soc Lond B Biol Sci 2022; 377:20200391. [PMID: 34775823 PMCID: PMC8591388 DOI: 10.1098/rstb.2020.0391] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Accepted: 07/08/2021] [Indexed: 12/02/2022] Open
Abstract
Studies show that specific vocal modulations, akin to those of infant-directed speech (IDS) and perhaps music, play a role in communicating intentions and mental states during human social interaction. Based on this, we propose a model for the evolution of musicality-the capacity to process musical information-in relation to human vocal communication. We suggest that a complex social environment, with strong social bonds, promoted the appearance of musicality-related abilities. These social bonds were not limited to those between offspring and mothers or other carers, although these may have been especially influential in view of altriciality of human infants. The model can be further tested in other species by comparing levels of sociality and complexity of vocal communication. By integrating several theories, our model presents a radically different view of musicality, not limited to specifically musical scenarios, but one in which this capacity originally evolved to aid parent-infant communication and bonding, and even today plays a role not only in music but also in IDS, as well as in some adult-directed speech contexts. This article is part of the theme issue 'Voice modulation: from origin and mechanism to social impact (Part II)'.
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Affiliation(s)
- Juan David Leongómez
- Human Behaviour Lab, Faculty of Psychology, Universidad El Bosque, Bogota, Colombia
| | - Jan Havlíček
- Department of Zoology, Charles University, Prague, Czech Republic
| | - S. Craig Roberts
- Faculty of Natural Sciences, University of Stirling, Stirling, UK
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21
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Pougnault L, Levréro F, Leroux M, Paulet J, Bombani P, Dentressangle F, Deruti L, Mulot B, Lemasson A. Social pressure drives "conversational rules" in great apes. Biol Rev Camb Philos Soc 2021; 97:749-765. [PMID: 34873806 DOI: 10.1111/brv.12821] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 11/19/2021] [Accepted: 11/25/2021] [Indexed: 01/07/2023]
Abstract
In the last decade, two hypotheses, one on the evolution of animal vocal communication in general and the other on the origins of human language, have gained ground. The first hypothesis argues that the complexity of communication co-evolved with the complexity of sociality. Species forming larger groups with complex social networks have more elaborate vocal repertoires. The second hypothesis posits that the core of communication is represented not only by what can be expressed by an isolated caller, but also by the way that vocal interactions are structured, language being above all a social act. Primitive forms of conversational rules based on a vocal turn-taking principle are thought to exist in primates. To support and bring together these hypotheses, more comparative studies of socially diverse species at different levels of the primate phylogeny are needed. However, the majority of available studies focus on monkeys, primates that are distant from the human lineage. Great apes represent excellent candidates for such comparative studies because of their phylogenetic proximity to humans and their varied social lives. We propose that studying vocal turn-taking in apes could address several major gaps regarding the social relevance of vocal turn-taking and the evolutionary trajectory of this behaviour among anthropoids. Indeed, how the social structure of a species may influence the vocal interaction patterns observed among group members remains an open question. We gathered data from the literature as well as original unpublished data (where absent in the literature) on four great ape species: chimpanzees Pan troglodytes, bonobos Pan paniscus, western lowland gorillas Gorilla gorilla gorilla and Bornean orang-utans Pongo pygmaeus. We found no clear-cut relationship between classical social complexity metrics (e.g. number of group members, interaction rates) and vocal complexity parameters (e.g. repertoire size, call rates). Nevertheless, the nature of the society (i.e. group composition, diversity and valence of social bonds) and the type of vocal interaction patterns (isolated calling, call overlap, turn-taking-based vocal exchanges) do appear to be related. Isolated calling is the main vocal pattern found in the species with the smallest social networks (orang-utan), while the other species show vocal interactions that are structured according to temporal rules. A high proportion of overlapping vocalisations is found in the most competitive species (chimpanzee), while vocal turn-taking predominates in more tolerant bonobos and gorillas. Also, preferentially interacting individuals and call types used to interact are not randomly distributed. Vocal overlap ('chorusing') and vocal exchange ('conversing') appear as possible social strategies used to advertise/strengthen social bonds. Our analyses highlight that: (i) vocal turn-taking is also observed in non-human great apes, revealing universal rules for conversing that may be deeply rooted in the primate lineage; (ii) vocal interaction patterns match the species' social lifestyle; (iii) although limited to four species here, adopting a targeted comparative approach could help to identify the multiple and subtle factors underlying social and vocal complexity. We believe that vocal interaction patterns form the basis of a promising field of investigation that may ultimately improve our understanding of the socially driven evolution of communication.
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Affiliation(s)
- Loïc Pougnault
- Univ Rennes, Normandie Univ, CNRS, EthoS (Éthologie animale et humaine) - UMR 6552, 263 avenue du Général Leclerc, Rennes, 35042, France.,Université de Lyon/Saint-Etienne, CNRS, Equipe Neuro-Ethologie Sensorielle, ENES/CRNL, UMR5292, INSERM UMR_S 1028, 23 rue Paul Michelon, Saint-Etienne, 42023, France.,ZooParc de Beauval & Beauval Nature, Avenue du Blanc, Saint Aignan, 41110, France
| | - Florence Levréro
- Université de Lyon/Saint-Etienne, CNRS, Equipe Neuro-Ethologie Sensorielle, ENES/CRNL, UMR5292, INSERM UMR_S 1028, 23 rue Paul Michelon, Saint-Etienne, 42023, France
| | - Maël Leroux
- Department of Comparative Linguistics, University of Zürich, Thurgauerstrasse 30, Zürich-Oerlikon, 8050, Switzerland.,Budongo Conservation Field Station, Masindi, Uganda.,Center for the Interdisciplinary Study of Language Evolution (ISLE), University of Zürich, Plattenstrasse 54, Zürich, 8032, Switzerland
| | - Julien Paulet
- Univ Rennes, Normandie Univ, CNRS, EthoS (Éthologie animale et humaine) - UMR 6552, 263 avenue du Général Leclerc, Rennes, 35042, France
| | - Pablo Bombani
- NGO Mbou-Mon-Tour, Nkala, Territoire de Bolodo, Maï-Ndombe, Democratic Republic of the Congo
| | - Fabrice Dentressangle
- Université de Lyon/Saint-Etienne, CNRS, Equipe Neuro-Ethologie Sensorielle, ENES/CRNL, UMR5292, INSERM UMR_S 1028, 23 rue Paul Michelon, Saint-Etienne, 42023, France
| | - Laure Deruti
- Université de Lyon/Saint-Etienne, CNRS, Equipe Neuro-Ethologie Sensorielle, ENES/CRNL, UMR5292, INSERM UMR_S 1028, 23 rue Paul Michelon, Saint-Etienne, 42023, France
| | - Baptiste Mulot
- ZooParc de Beauval & Beauval Nature, Avenue du Blanc, Saint Aignan, 41110, France
| | - Alban Lemasson
- Univ Rennes, Normandie Univ, CNRS, EthoS (Éthologie animale et humaine) - UMR 6552, 263 avenue du Général Leclerc, Rennes, 35042, France.,Institut Universitaire de France, 1 rue Descartes, Paris, 75231, France
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22
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Abstract
Understanding facial signals in humans and other species is crucial for understanding the evolution, complexity, and function of the face as a communication tool. The Facial Action Coding System (FACS) enables researchers to measure facial movements accurately, but we currently lack tools to reliably analyse data and efficiently communicate results. Network analysis can provide a way to use the information encoded in FACS datasets: by treating individual AUs (the smallest units of facial movements) as nodes in a network and their co-occurrence as connections, we can analyse and visualise differences in the use of combinations of AUs in different conditions. Here, we present ‘NetFACS’, a statistical package that uses occurrence probabilities and resampling methods to answer questions about the use of AUs, AU combinations, and the facial communication system as a whole in humans and non-human animals. Using highly stereotyped facial signals as an example, we illustrate some of the current functionalities of NetFACS. We show that very few AUs are specific to certain stereotypical contexts; that AUs are not used independently from each other; that graph-level properties of stereotypical signals differ; and that clusters of AUs allow us to reconstruct facial signals, even when blind to the underlying conditions. The flexibility and widespread use of network analysis allows us to move away from studying facial signals as stereotyped expressions, and towards a dynamic and differentiated approach to facial communication.
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23
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Kavanagh E, Street SE, Angwela FO, Bergman TJ, Blaszczyk MB, Bolt LM, Briseño-Jaramillo M, Brown M, Chen-Kraus C, Clay Z, Coye C, Thompson ME, Estrada A, Fichtel C, Fruth B, Gamba M, Giacoma C, Graham KE, Green S, Grueter CC, Gupta S, Gustison ML, Hagberg L, Hedwig D, Jack KM, Kappeler PM, King-Bailey G, Kuběnová B, Lemasson A, Inglis DM, Machanda Z, MacIntosh A, Majolo B, Marshall S, Mercier S, Micheletta J, Muller M, Notman H, Ouattara K, Ostner J, Pavelka MSM, Peckre LR, Petersdorf M, Quintero F, Ramos-Fernández G, Robbins MM, Salmi R, Schamberg I, Schoof VAM, Schülke O, Semple S, Silk JB, Sosa-Lopéz JR, Torti V, Valente D, Ventura R, van de Waal E, Weyher AH, Wilke C, Wrangham R, Young C, Zanoli A, Zuberbühler K, Lameira AR, Slocombe K. Dominance style is a key predictor of vocal use and evolution across nonhuman primates. ROYAL SOCIETY OPEN SCIENCE 2021; 8:210873. [PMID: 34350023 PMCID: PMC8316807 DOI: 10.1098/rsos.210873] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Accepted: 07/08/2021] [Indexed: 06/13/2023]
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.
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Affiliation(s)
- Eithne Kavanagh
- Department of Psychology, University of York, Heslington, York YO10 5DD, UK
- Department of Psychology, Nottingham Trent University, Chaucer Building, 50 Shakespeare St, Nottingham NG1 4FQ, UK
| | - Sally E. Street
- Department of Anthropology, Durham University, South Road, Durham DH1 3LE, UK
| | - Felix O. Angwela
- School of Agricultural and Environmental Sciences, Mountains of the Moon University, PO Box 837, Fort Portal, Uganda
| | - Thore J. Bergman
- Departments of Psychology, EEB, University of Michigan, Ann Arbor, MI 48109, USA
| | - Maryjka B. Blaszczyk
- Department of Anthropology, University of Texas at Austin, 2201 Speedway Stop C3200, Austin, TX 78712, USA
| | - Laura M. Bolt
- Department of Anthropology, University of Waterloo, 200 University Avenue West, Waterloo, Ontario, Canada N2 L 3G1
| | - Margarita Briseño-Jaramillo
- Instituto de Biologia, Universidad Nacional Autonoma de México (UNAM), Circuito exterior s/n, Ciudad Universitaria, Copilco, Coyoacán, Mexico City 04510, Mexico
- Centro Interdisciplinario de Investigación para el Desarrollo Integral Regional Unidad Oaxaca (CIIDIR), Instituto Politécnico Nacional, Hornos No. 1003, Col. Noche Buena, Municipio de Santa Cruz Xoxocotlán, Oaxaca 71230, Mexico
| | - Michelle Brown
- Department of Anthropology, University of California, 552 University Road, Santa Barbara, CA 93106-3210, USA
| | - Chloe Chen-Kraus
- Department of Anthropology, Yale University, 10 Sachem Street, New Haven, CT 06511, USA
| | - Zanna Clay
- Department of Psychology, Durham University, South Road, Durham DH1 3LE, UK
| | - Camille Coye
- College of Life and Environmental Sciences, University of Exeter, Penryn Campus Treliever Road, Penryn TR10 9FE, UK
- Human and Animal Ethology (EthoS), University of Rennes, Normandie University, CNRS, EthoS - UMR6552, Campus de Beaulieu, 263 Avenue du Général Leclerc, 35000 Rennes, France
| | - Melissa Emery Thompson
- Department of Anthropology, University of New Mexico, 500 University Boulevard NE, Albuquerque, NM 87131, USA
| | - Alejandro Estrada
- Field Research Station Los Tuxtlas, Institute of Biology, National Autonomous University of Mexico, Circuito interior s/n, Ciudad universitaria, Delegacion coyoacan, Mexico City CP 04510, Mexico
| | - Claudia Fichtel
- Behavioral Ecology and Sociobiology Unit, German Primate Center, Leibniz Institute for Primate Research, Kellnerweg 4, 37077 Göttingen, Germany
- Leibniz ScienceCampus Primate Cognition, Kellnerweg 4, 37077 Göttingen, Germany
| | - Barbara Fruth
- School of Biological and Environmental Science, Liverpool John Moores University, Liverpool L3 3AF, UK
- Centre for Research and Conservation, Royal Zoological Society of Antwerp, 2018 Antwerp, Belgium
- Department of the Ecology of Animal Societies, Max Planck Institute of Animal Behavior, Bücklestraße 5, 78467 Konstanz, Germany
| | - Marco Gamba
- Department of Life Sciences and Systems Biology, University of Turin, via Accademia Albertina, 13, 10123 Turin, Italy
| | - Cristina Giacoma
- Department of Life Sciences and Systems Biology, University of Turin, via Accademia Albertina, 13, 10123 Turin, Italy
| | - Kirsty E. Graham
- Department of Psychology, University of York, Heslington, York YO10 5DD, UK
- School of Psychology & Neuroscience, University of St Andrews, St Andrews, KY16 9JP, UK
| | - Samantha Green
- School of Human Sciences, The University of Western Australia, 35 Stirling Highway, 6009 Crawley, Western Australia, Australia
- UWA Africa Research and Engagement Centre, The University of Western Australia, 35 Stirling Highway, 6009 Crawley, Western Australia, Australia
| | - Cyril C. Grueter
- School of Human Sciences, The University of Western Australia, 35 Stirling Highway, 6009 Crawley, Western Australia, Australia
- UWA Africa Research and Engagement Centre, The University of Western Australia, 35 Stirling Highway, 6009 Crawley, Western Australia, Australia
- Centre for Evolutionary Biology, School of Biological Sciences, The University of Western Australia, 35 Stirling Highway, 6009 Crawley, Western Australia, Australia
| | - Shreejata Gupta
- Department of Psychology, University of York, Heslington, York YO10 5DD, UK
| | - Morgan L. Gustison
- Department of Integrative Biology, University of Texas at Austin, 2415 Speedway, Austin, TX 78712, USA
| | - Lindsey Hagberg
- Department of Human Evolutionary Biology, Harvard University, 11 Divinity Avenue, Cambridge, MA 02138, USA
| | - Daniela Hedwig
- K. Lisa Yang Center for Conservation Bioacoustics, Cornell Lab of Ornithology, Cornell University, 159 Sapsucker Woods Road, Ithaca, NY 14850, USA
| | - Katharine M. Jack
- Department of Anthropology, Tulane University, 6823 St. Charles Avenue, New Orleans, LA 70118, USA
| | - Peter M. Kappeler
- Behavioral Ecology and Sociobiology Unit, German Primate Center, Leibniz Institute for Primate Research, Kellnerweg 4, 37077 Göttingen, Germany
- Department Sociobiology/Anthropology, Johann-Friedrich-Blumenbach Institute of Zoology and Anthropology, University Göttingen, Kellnerweg 6, 37077 Göttingen, Germany
| | - Gillian King-Bailey
- Department of Anthropology, Tulane University, 6823 St. Charles Avenue, New Orleans, LA 70118, USA
| | - Barbora Kuběnová
- Primate Research Institute, Kyoto University, 41-2 Kanrin, Inuyama, Aichi 484-8506, Japan
| | - Alban Lemasson
- Human and Animal Ethology (EthoS), University of Rennes, Normandie University, CNRS, EthoS - UMR6552, Campus de Beaulieu, 263 Avenue du Général Leclerc, 35000 Rennes, France
| | - David MacGregor Inglis
- Department of Life Sciences, University of Roehampton, Holybourne Avenue, London SW15 4JD, UK
| | - Zarin Machanda
- Department of Anthropology, Tufts University, 5 The Green, Medford, MA 02155, USA
| | - Andrew MacIntosh
- Primate Research Institute, Kyoto University, 41-2 Kanrin, Inuyama, Aichi 484-8506, Japan
| | - Bonaventura Majolo
- School of Psychology, University of Lincoln, Lincoln, Brayford Wharf East LN5 7TS, UK
| | - Sophie Marshall
- Department of Psychology, University of York, Heslington, York YO10 5DD, UK
| | - Stephanie Mercier
- Department of Comparative Cognition, Institute of Biology, University of Neuchâtel, Rue Emile-Argand 11, 2000 Neuchâtel, Switzerland
- Inkawu Vervet Project, Mawana Game Reserve, Swart Mfolozi 3115, South Africa
| | - Jérôme Micheletta
- Department of Psychology, Centre for Evolutionary and Comparative Psychology, University of Portsmouth, King Henry Building, King Henry I Street, PO1 2DY Portsmouth, UK
- Macaca Nigra Project, Tangkoko Reserve, PO Box 1495, Bitung, Indonesia
| | - Martin Muller
- Department of Anthropology, University of New Mexico, 500 University Boulevard NE, Albuquerque, NM 87131, USA
| | - Hugh Notman
- Anthropology, Faculty of Humanities and Social Sciences, Athabasca University, Athabasca, Canada
| | - Karim Ouattara
- Centre Suisse de Recherches Scientifiques en Côte d'Ivoire, 01 BP 1303 Abidjan 01, Ivory Coast
| | - Julia Ostner
- Research Group Primate Social Evolution, German Primate Center, Leibniz Institute for Primate Research, Kellnerweg 4, 37077 Göttingen, Germany
- Leibniz ScienceCampus Primate Cognition, Kellnerweg 4, 37077 Göttingen, Germany
- Department of Behavioral Ecology, Johann-Friedrich-Blumenbach Institute for Zoology and Anthropology, University Goettingen, Göttingen, Germany
| | - Mary S. M. Pavelka
- Department of Anthropology and Archaeology, University of Calgary, 2500 University Drive NW, Calgary, Alberta, Canada T2N 1N4
| | - Louise R. Peckre
- Behavioral Ecology and Sociobiology Unit, German Primate Center, Leibniz Institute for Primate Research, Kellnerweg 4, 37077 Göttingen, Germany
- Leibniz ScienceCampus Primate Cognition, Kellnerweg 4, 37077 Göttingen, Germany
| | - Megan Petersdorf
- Department of Anthropology, New York University, 25 Waverly Place, New York, NY, USA
| | - Fredy Quintero
- Department of Comparative Cognition, Institute of Biology, University of Neuchâtel, Rue Emile-Argand 11, 2000 Neuchâtel, Switzerland
| | - Gabriel Ramos-Fernández
- Instituto de Investigaciones en Matemáticas Aplicadas y en Sistemas, Universidad Nacional Autónoma de México, Circuto Escolar 3000, C.U., 04510 Mexico City, Mexico
- UPIITA, Instituto Politécnico Nacional, Avenida Instituto Politécnico Nacional 2580, La Laguna Ticoman, 07340 Mexico City, Mexico
| | - Martha M. Robbins
- Department of Primatology, Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, 04103 Leipzig, Germany
| | - Roberta Salmi
- Department of Anthropology, University of Georgia, 355 S. Jackson Street, Athens, GA 30602, USA
| | - Isaac Schamberg
- Department of Human Evolutionary Biology, Harvard University, 11 Divinity Avenue, Cambridge, MA 02138, USA
| | - Valérie A. M. Schoof
- Department of Anthropology, Tulane University, 6823 St. Charles Avenue, New Orleans, LA 70118, USA
- Department of Biology, York University, Keele Campus, 4700, Keele Street, Toronto, ON Canada, M3J 1P3
| | - Oliver Schülke
- Research Group Primate Social Evolution, German Primate Center, Leibniz Institute for Primate Research, Kellnerweg 4, 37077 Göttingen, Germany
- Leibniz ScienceCampus Primate Cognition, Kellnerweg 4, 37077 Göttingen, Germany
- Department of Behavioral Ecology, Johann-Friedrich-Blumenbach Institute for Zoology and Anthropology, University Goettingen, Göttingen, Germany
| | - Stuart Semple
- Department of Life Sciences, University of Roehampton, Holybourne Avenue, London SW15 4JD, UK
| | - Joan B. Silk
- School of Human Evolution and Social Change, Arizona State University, Tempe, AZ 85287, USA
| | - J. Roberto Sosa-Lopéz
- CONACYT-Centro Interdisciplinario de Investigación para el Desarrollo Integral Regional Unidad Oaxaca (CIIDIR), Instituto Politécnico Nacional, Hornos No. 1003, Col. Noche Buena, Santa Cruz Xoxocotlán, Oaxaca 71230, Mexico
| | - Valeria Torti
- Department of Life Sciences and Systems Biology, University of Turin, via Accademia Albertina, 13, 10123 Turin, Italy
| | - Daria Valente
- Department of Life Sciences and Systems Biology, University of Turin, via Accademia Albertina, 13, 10123 Turin, Italy
| | - Raffaella Ventura
- Scottish Primate Research Group, Division of Psychology, School of Social and Health Sciences, University of Abertay Dundee, Dundee, Scotland
| | - Erica van de Waal
- Inkawu Vervet Project, Mawana Game Reserve, Swart Mfolozi 3115, South Africa
- Department of Ecology and Evolution, University of Lausanne, 1015 Lausanne, Switzerland
| | - Anna H. Weyher
- Department of Anthropology, University of Massachusetts Amherst, 240 Hicks Way #217, Amherst, MA 01003, USA
| | - Claudia Wilke
- Department of Psychology, University of York, Heslington, York YO10 5DD, UK
| | - Richard Wrangham
- Department of Human Evolutionary Biology, Harvard University, 11 Divinity Avenue, Cambridge, MA 02138, USA
| | - Christopher Young
- Endocrine Research Laboratory, Mammal Research Institute, Faculty of Natural and Agricultural Science, University of Pretoria, Hatfield, Pretoria 0028, Republic of South Africa
- Applied Behavioural Ecology and Ecosystems Research Unit, University of South Africa, Pretoria, Florida 1710, Republic of South Africa
- Department of Psychology, University of Lethbridge, Alberta, Canada T1K6T5
| | - Anna Zanoli
- Department of Life Sciences and Systems Biology, University of Turin, via Accademia Albertina, 13, 10123 Turin, Italy
| | - Klaus Zuberbühler
- Department of Anthropology, Tufts University, 5 The Green, Medford, MA 02155, USA
- School of Psychology and Neuroscience, University of St. Andrews, South Street, St. Mary's Quad, South Street, St. Andrews KY16 9JP, UK
| | - Adriano R. Lameira
- School of Psychology and Neuroscience, University of St. Andrews, South Street, St. Mary's Quad, South Street, St. Andrews KY16 9JP, UK
- Department of Psychology, University of Warwick, University Road, Humanities Building, Coventry CV4 7AL, UK
| | - Katie Slocombe
- Department of Psychology, University of York, Heslington, York YO10 5DD, UK
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Zannella A, Stanyon R, Maglieri V, Palagi E. Not all yawns tell the same story: The case of Tonkean macaques. Am J Primatol 2021; 83:e23263. [PMID: 33955009 PMCID: PMC8365700 DOI: 10.1002/ajp.23263] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 04/04/2021] [Accepted: 04/09/2021] [Indexed: 12/21/2022]
Abstract
Here we show for the first time that the plasticity in morphology and duration of yawning in Macaca tonkeana can be associated with different functional contexts. Macaca tonkeana is classified as a tolerant macaque species characterized by social interactions minimally constrained by dominance rank or kinship. Tonkean macaques, as other egalitarian species, rely on a complex facial communicative system. We found that the degree of mouth opening (ranging from covered to uncovered tooth yawns) and the duration of yawning were not strictly dependent. The shortest uncovered tooth yawns were associated with an intense locomotor/physical activity and peaked immediately after stressful social events thus indicating an increase in arousal. In contrast, longer yawns, independently from teeth exposure, were primarily associated with a relaxed state of the subject. In conclusion, our study suggests that to explore the potential different functions of yawning, it is necessary to focus on the variability of its expression both in terms of morphology and duration, because not all yawns tell the same story.
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Affiliation(s)
- Alessandra Zannella
- Anthropology Laboratories, Department of BiologyUniversity of FlorenceFlorenceItaly
- Natural History MuseumUniversity of PisaPisaItaly
| | - Roscoe Stanyon
- Anthropology Laboratories, Department of BiologyUniversity of FlorenceFlorenceItaly
| | | | - Elisabetta Palagi
- Natural History MuseumUniversity of PisaPisaItaly
- Unit of Ethology, Department of BiologyUniversity of PisaPisaItaly
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25
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Abstract
Music comprises a diverse category of cognitive phenomena that likely represent both the effects of psychological adaptations that are specific to music (e.g., rhythmic entrainment) and the effects of adaptations for non-musical functions (e.g., auditory scene analysis). How did music evolve? Here, we show that prevailing views on the evolution of music - that music is a byproduct of other evolved faculties, evolved for social bonding, or evolved to signal mate quality - are incomplete or wrong. We argue instead that music evolved as a credible signal in at least two contexts: coalitional interactions and infant care. Specifically, we propose that (1) the production and reception of coordinated, entrained rhythmic displays is a co-evolved system for credibly signaling coalition strength, size, and coordination ability; and (2) the production and reception of infant-directed song is a co-evolved system for credibly signaling parental attention to secondarily altricial infants. These proposals, supported by interdisciplinary evidence, suggest that basic features of music, such as melody and rhythm, result from adaptations in the proper domain of human music. The adaptations provide a foundation for the cultural evolution of music in its actual domain, yielding the diversity of musical forms and musical behaviors found worldwide.
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Affiliation(s)
- Samuel A Mehr
- Department of Psychology, Harvard University, Cambridge, MA02138, ; https://; https://projects.iq.harvard.edu/epl
- Data Science Initiative, Harvard University, Cambridge, MA02138
- School of Psychology, Victoria University of Wellington, Wellington6012, New Zealand
| | - Max M Krasnow
- Department of Psychology, Harvard University, Cambridge, MA02138, ; https://; https://projects.iq.harvard.edu/epl
| | - Gregory A Bryant
- Department of Communication, University of California Los Angeles, Los Angeles, CA90095, ; https://gabryant.bol.ucla.edu
- Center for Behavior, Evolution, & Culture, University of California Los Angeles, Los Angeles, CA90095
| | - Edward H Hagen
- Department of Anthropology, Washington State University, Vancouver, WA98686, USA. ; https://anthro.vancouver.wsu.edu/people/hagen
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