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  Travel linearity and speed of human foragers and chimpanzees during their daily search for food in tropical rainforests

Jang, H., Boesch, C., Mundry, R., Ban, S. D., & Janmaat, K. R. L. (2019). Travel linearity and speed of human foragers and chimpanzees during their daily search for food in tropical rainforests. Scientific Reports, 9: 11066. doi:10.1038/s41598-019-47247-9.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-9F55-9 Version Permalink: http://hdl.handle.net/21.11116/0000-0005-9F56-8
Genre: Journal Article

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This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Cre- ative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not per- mitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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 Creators:
Jang, Haneul1, 2, Author              
Boesch, Christophe3, Author              
Mundry, Roger1, Author              
Ban, Simone D., Author
Janmaat, Karline R. L.3, Author              
Affiliations:
1Department of Primatology, Max Planck Institute for Evolutionary Anthropology, Max Planck Society, ou_1497674              
2The Leipzig School of Human Origins (IMPRS), Max Planck Institute for Evolutionary Anthropology, Max Planck Society, ou_1497688              
3Chimpanzees, Department of Primatology, Max Planck Institute for Evolutionary Anthropology, Max Planck Society, Deutscher Platz 6, 04103 Leipzig, DE, ou_2149636              

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 Abstract: To understand the evolutionary roots of human spatial cognition, researchers have compared spatial abilities of humans and one of our closest living relatives, the chimpanzee (Pan troglodytes). However, how humans and chimpanzees compare in solving spatial tasks during real-world foraging is unclear to date, as measuring such spatial abilities in natural habitats is challenging. Here we compared spatial movement patterns of the Mbendjele BaYaka people and the Taï chimpanzees during their daily search for food in rainforests. We measured linearity and speed during off-trail travels toward out-of-sight locations as proxies for spatial knowledge. We found similarly high levels of linearity in individuals of Mbendjele foragers and Taï chimpanzees. However, human foragers and chimpanzees clearly differed in their reactions to group size and familiarity with the foraging areas. Mbendjele foragers increased travel linearity with increasing familiarity and group size, without obvious changes in speed. This pattern was reversed in Taï chimpanzees. We suggest that these differences between Mbendjele foragers and Taï chimpanzees reflect their different ranging styles, such as life-time range size and trail use. This result highlights the impact of socio-ecological settings on comparing spatial movement patterns. Our study provides a first step toward comparing long-range spatial movement patterns of two closely-related species in their natural environments.

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Language(s): eng - English
 Dates: 2019-07-30
 Publication Status: Published online
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 Rev. Method: Peer
 Identifiers: DOI: 10.1038/s41598-019-47247-9
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Title: Scientific Reports
Source Genre: Journal
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Publ. Info: London : Nature
Pages: - Volume / Issue: 9 Sequence Number: 11066 Start / End Page: - Identifier: ISSN: 2045-2322