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  Camera traps unveil demography, social structure, and home range of six unhabituated Western chimpanzee groups in the Moyen Bafing National Park, Guinea

Benjamin, D., Barry, M. M., Arandjelovic, M., Stephens, C. R., Maldonado, N., & Boesch, C. (2024). Camera traps unveil demography, social structure, and home range of six unhabituated Western chimpanzee groups in the Moyen Bafing National Park, Guinea. American Journal of Primatology, 86(2): e23578. doi:10.1002/ajp.23578.

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Item Permalink: https://hdl.handle.net/21.11116/0000-000D-FD26-C Version Permalink: https://hdl.handle.net/21.11116/0000-000E-55A3-A
Genre: Journal Article

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This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial‐NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made. © 2023 The Authors. American Journal of Primatology published by Wiley Periodicals LLC.
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This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial‐NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made. © 2023 The Authors. American Journal of Primatology published by Wiley Periodicals LLC.
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 Creators:
Benjamin, Debetencourt1, Author                 
Barry, Mamadou Moussa, Author
Arandjelovic, Milica1, Author                 
Stephens, Colleen R.1, Author           
Maldonado, Nuria1, Author           
Boesch, Christophe1, Author                 
Affiliations:
1Department of Primate Behavior and Evolution, Max Planck Institute for Evolutionary Anthropology, Max Planck Society, Deutscher Platz 6, 04103 Leipzig, DE, ou_3367832              

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Free keywords: camera traps, chimpanzees, conservation, demography, monitoring
 Abstract: Abstract Precise estimates of population dynamics and social grouping patterns are required for effective conservation of wild animal populations. It is difficult to obtain such information on non-human great apes as they have slow reproductive rates. To gain a better understanding of demography in these populations, previous research has typically involved habituation\, a process that requires years. Here, we collected data continuously over year-long periods to monitor an unhabituated population of critically endangered Western chimpanzees (Pan troglodytes verus) in the Moyen Bafing National Park, Guinea. We used two arrays of 100 camera traps that were placed opportunistically in two distinct 100?km2 sites, named Bakoun and Koukoutamba. We identified 227 individuals in Bakoun and 207 in Koukoutamba through their unique facial features. Our camera trap data make clear that these individuals belong to six and seven closed groups, respectively. Six of those groups were near-completely sampled with an average minimum size of 46.8 individuals (range: 37?58), and a mean adult sex ratio of 1.32 (range: 0.93?2.10). We described the demographic composition of these groups and use Bayesian social network analysis to understand population structure. The network analyses suggested that the social bonds within the two populations were structured by sex homophily, with male chimpanzees being more or equally likely to be observed together than other adult associations. Through estimation of minimum convex polygons, we described the minimum home range for those groups. Compared to other chimpanzee groups living in a similar environment (mosaic savanna-forest), the Moyen Bafing region seems to host a high-density of chimpanzees with small home ranges for their group size. Our research highlights the potential of camera traps for studying the demographic composition of chimpanzee populations with high resolution and obtaining crucial information on several groups in a time-efficient and cost-effective way.

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Language(s): eng - English
 Dates: 2024-02
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1002/ajp.23578
 Degree: -

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Title: American Journal of Primatology
Source Genre: Journal
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Publ. Info: John Wiley & Sons Inc
Pages: - Volume / Issue: 86 (2) Sequence Number: e23578 Start / End Page: - Identifier: ISBN: 0275-2565