The DOI matches its Crossref record; 29 of the 30 references it cites were found in a registry or an index.
Gorillas' Vocalizations During Rest Periods: Signals of Impending Departure?
Abstract
Animal signals have been interpreted as indicating something about the signaller's internal state and hence its subsequent behaviour, while at the same time eliciting a response from the receiver. Such signals are often given when the costs and benefits of an action depend on what others do. This interpretation of meaning and function of signals has been applied primarily to ritualized competitive or courtship displays. Here we use the approach to analyse another context of signalling and a more subtle communicatory behaviour. Gorillas live in small cohesive groups whose synchronized activities alternate between travel/ feeding periods and resting periods. We present data on gorillas' vocalizations - the grunts - prior to a coordinated departure from a rest period. We suggest that gorillas use these signals to indicate their readiness to depart and to assess that readiness in others. Vocal activity increased significantly towards the end of rest periods, due both to individuals calling at higher rates, and to a greater number of vocalizers. This increase in vocal activity was not associated with a greater clumping of animals, nor with an increase in non-rest activities, and therefore appeared to be related to subsequent departure. The frequent exchange of grunts supports the notion that gorillas might use the calls of others to assess their readiness to depart. We speculate that such signalling could function to synchronize the behaviour of group members and lead to coordinated group movement.
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“So-called 'pre-departure vocalizations' are often part of this coordinating and decision-making procedure.”
From Rules of departure: Antiphony and personalized vocal spaces in wild male elephant group coordination (2024) · cites this paper as [12]
Citations
Cites
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Contexts and social correlates of long-distance calling by male chimpanzees
Mitani, J. C., & Nishida, T. (1993) · Animal Behaviour · doi:10.1006/anbe.1993.1088 · Cited by 229
Animal signals: Ethological and games-theory approaches are not incompatible
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Bullo, F., Cortés, J., & Martínez, S. (2009) · Princeton University Press eBooks · doi:10.1515/9781400831470 · Cited by 1,538
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Conradt, L., & Roper, T. J. (2005) · Trends in Ecology & Evolution · doi:10.1016/j.tree.2005.05.008 · Cited by 872
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Metadata
- Authors
- Stewart, K. J., & Harcourt, A. H.
- Affiliations
- University of California, Davis (US)
- Venue
- Behaviour
- Publisher
- Walter de Gruyter GmbH
- Published
- 1994
- Volume
- 130
- Issue
- 1-2
- Pages
- 29-40
- ISSN
- 0005-7959 (ISSN-L)
- 1568-539X
- OpenAlex
- W2002466756
- Cited by
- 137
- References
- 30
- Citations by year
- 2026: 2 · 2025: 3 · 2024: 9 · 2023: 3 · 2022: 4 · 2021: 6 · 2020: 2 · 2019: 6 · 2018: 5 · 2017: 9 · 2016: 12 · 2015: 4 · 2014: 5 · 2013: 6 · 2012: 6
- FWCI
- 0.65
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Behaviour (publishedVersion)
- Topics
- Life Sciences › Agricultural and Biological Sciences › Ecology, Evolution, Behavior and Systematics › Primate Behavior and Ecology
- Life Sciences › Agricultural and Biological Sciences › Ecology, Evolution, Behavior and Systematics › Animal Vocal Communication and Behavior
- Physical Sciences › Environmental Science › Ecology › Marine animal studies overview
- Keywords
- gorillas, vocalizations, grunts, rest periods, animal communication, collective synchronization, social cohesion, primate behavior
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