Production of and responses to unimodal and multimodal signals in wild chimpanzees, Pan troglodytes schweinfurthii

Wilke, C., Kavanagh, E. ORCID: 0000-0001-7202-005X, Donnellan, E., Waller, B.M. ORCID: 0000-0001-6303-7458, Machanda, Z.P. and Slocombe, K.E., 2017. Production of and responses to unimodal and multimodal signals in wild chimpanzees, Pan troglodytes schweinfurthii. Animal Behaviour, 123, pp. 305-316. ISSN 0003-3472

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Animals communicate using a vast array of different signals in different modalities. For chimpanzees, vocalizations, gestures and facial expressions are all important forms of communication, yet these signals have rarely been studied together holistically. The current study aimed to provide the first comprehensive repertoire of flexibly combined (‘free’) multimodal (MM) signals, and assess individual and contextual factors influencing production of, and responses to, unimodal (UM) and MM signals in wild chimpanzees. In total, 48 different free MM signals were produced. MM signals were produced at a significantly lower rate than UM signals, but 22 of 26 focal animals were observed to produce free MM signals. The relative production rates of different types of UM and MM signals differed significantly between the behavioural contexts investigated, showing flexible use of signals across contexts. In contrast, individual factors such as age, sex or rank of signaller did not appear to influence the type of signal produced or the likelihood of eliciting a response. Finally, we compared recipient responses to free MM grunt-gesture signals and matched UM component signals and found that these MM signals were more likely to elicit a response than a grunt alone, but were as likely to elicit a response as the gesture alone. The overall findings point to a widespread capacity for wild chimpanzees to flexibly combine signals from different modalities and highlight the importance of adopting a multimodal approach to studying communication.

Item Type: Journal article
Publication Title: Animal Behaviour
Creators: Wilke, C., Kavanagh, E., Donnellan, E., Waller, B.M., Machanda, Z.P. and Slocombe, K.E.
Publisher: Academic Press
Date: January 2017
Volume: 123
ISSN: 0003-3472
S0003347216302731Publisher Item Identifier
Divisions: Schools > School of Social Sciences
Record created by: Jonathan Gallacher
Date Added: 08 Oct 2020 13:34
Last Modified: 16 Nov 2021 16:27

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