Dataset Information

Chimpanzee accumulative stone throwing.

ABSTRACT: The study of the archaeological remains of fossil hominins must rely on reconstructions to elucidate the behaviour that may have resulted in particular stone tools and their accumulation. Comparatively, stone tool use among living primates has illuminated behaviours that are also amenable to archaeological examination, permitting direct observations of the behaviour leading to artefacts and their assemblages to be incorporated. Here, we describe newly discovered stone tool-use behaviour and stone accumulation sites in wild chimpanzees reminiscent of human cairns. In addition to data from 17 mid- to long-term chimpanzee research sites, we sampled a further 34 Pan troglodytes communities. We found four populations in West Africa where chimpanzees habitually bang and throw rocks against trees, or toss them into tree cavities, resulting in conspicuous stone accumulations at these sites. This represents the first record of repeated observations of individual chimpanzees exhibiting stone tool use for a purpose other than extractive foraging at what appear to be targeted trees. The ritualized behavioural display and collection of artefacts at particular locations observed in chimpanzee accumulative stone throwing may have implications for the inferences that can be drawn from archaeological stone assemblages and the origins of ritual sites.

SUBMITTER: Kuhl HS

PROVIDER: S-EPMC4770594 | biostudies-literature | 2016 Feb

REPOSITORIES: biostudies-literature

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Chimpanzee accumulative stone throwing.

Kühl Hjalmar S HS Kalan Ammie K AK Arandjelovic Mimi M Aubert Floris F D'Auvergne Lucy L Goedmakers Annemarie A Jones Sorrel S Kehoe Laura L Regnaut Sebastien S Tickle Alexander A Ton Els E van Schijndel Joost J Abwe Ekwoge E EE Angedakin Samuel S Agbor Anthony A Ayimisin Emmanuel Ayuk EA Bailey Emma E Bessone Mattia M Bonnet Matthieu M Brazolla Gregory G Buh Valentine Ebua VE Chancellor Rebecca R Cipoletta Chloe C Cohen Heather H Corogenes Katherine K Coupland Charlotte C Curran Bryan B Deschner Tobias T Dierks Karsten K Dieguez Paula P Dilambaka Emmanuel E Diotoh Orume O Dowd Dervla D Dunn Andrew A Eshuis Henk H Fernandez Rumen R Ginath Yisa Y Hart John J Hedwig Daniela D Ter Heegde Martijn M Hicks Thurston Cleveland TC Imong Inaoyom I Jeffery Kathryn J KJ Junker Jessica J Kadam Parag P Kambi Mohamed M Kienast Ivonne I Kujirakwinja Deo D Langergraber Kevin K Lapeyre Vincent V Lapuente Juan J Lee Kevin K Leinert Vera V Meier Amelia A Maretti Giovanna G Marrocoli Sergio S Mbi Tanyi Julius TJ Mihindou Vianet V Moebius Yasmin Y Morgan David D Morgan Bethan B Mulindahabi Felix F Murai Mizuki M Niyigabae Protais P Normand Emma E Ntare Nicolas N Ormsby Lucy Jayne LJ Piel Alex A Pruetz Jill J Rundus Aaron A Sanz Crickette C Sommer Volker V Stewart Fiona F Tagg Nikki N Vanleeuwe Hilde H Vergnes Virginie V Willie Jacob J Wittig Roman M RM Zuberbuehler Klaus K Boesch Christophe C

Scientific reports 20160229

The study of the archaeological remains of fossil hominins must rely on reconstructions to elucidate the behaviour that may have resulted in particular stone tools and their accumulation. Comparatively, stone tool use among living primates has illuminated behaviours that are also amenable to archaeological examination, permitting direct observations of the behaviour leading to artefacts and their assemblages to be incorporated. Here, we describe newly discovered stone tool-use behaviour and ston ...[more]

PMID: 26923684

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Project description:Compositionality refers to a structural property of human language, according to which the meaning of a complex expression is a function of the meaning of its parts and the way they are combined. Compositionality is a defining characteristic of all human language, spoken and signed. Comparative research into the emergence of human language aims at identifying precursors to such key features of human language in the communication of other primates. While it is known that chimpanzees, our closest relatives, produce a variety of gestures, facial expressions and vocalizations in interactions with their group members, little is known about how these signals combine simultaneously. Therefore, the aim of the current study is to investigate whether there is evidence for compositional structures in the communication of chimpanzees. We investigated two semi-wild groups of chimpanzees, with focus on their manual gestures and their combinations with facial expressions across different social contexts. If there are compositional structures in chimpanzee communication, adding a facial expression to a gesture should convey a different message than the gesture alone, a difference that we expect to be measurable by the recipient's response. Furthermore, we expect context-dependent usage of these combinations. Based on a form-based coding procedure of the collected video footage, we identified two frequently used manual gestures (stretched arm gesture and bent arm gesture) and two facial expression (bared teeth face and funneled lip face). We analyzed whether the recipients' response varied depending on the signaler's usage of a given gesture + face combination and the context in which these were used. Overall, our results suggest that, in positive contexts, such as play or grooming, specific combinations had an impact on the likelihood of the occurrence of particular responses. Specifically, adding a bared teeth face to a gesture either increased the likelihood of affiliative behavior (for stretched arm gesture) or eliminated the bias toward an affiliative response (for bent arm gesture). We show for the first time that the components under study are recombinable, and that different combinations elicit different responses, a property that we refer to as componentiality. Yet our data do not suggest that the components have consistent meanings in each combination-a defining property of compositionality. We propose that the componentiality exhibited in this study represents a necessary stepping stone toward a fully evolved compositional system.

Dataset Information

Chimpanzee accumulative stone throwing.

Publications

Chimpanzee accumulative stone throwing.

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