The Interdigital Brace and Other Grips for Termite Nest Perforation by Chimpanzees of the G oualougo T riangle, R epublic of C ongo

Bibliographic Data

ID8313674
AuthorsJulie J Lesnik (0000-0003-1683-4846, Department of Anthropology Wayne State University Detroit MI 48202, corresponding author), Crickette M Sanz (Department of Anthropology Washington University Saint Louis MI 63130), Crickette Sanz (0000-0003-2018-2721, Washington University in St. Louis), D Morgan (0000-0003-1266-2610, Lincoln Park Zoo), David B Morgan (Congo Program, Wildlife Conservation Society Brazzaville Republic of Congo)
Year2015
Volume157
Issue2
Pages252-259
Publication date2015-06-01
Peer ReviewedYes
Open AccessYes
TypeARTICLE
VenueAmerican Journal of Physical Anthropology (JOURNAL)
Journal identifiersISSN: 0002-9483 • E-ISSN: 1096-8644
PublisherWiley (PUBLISHER • GB)
DOI10.1002/ajpa.22706
PMID25916822
OpenAlexW1533994584
LanguageEN
Citations received6
References cited33

Studies of chimpanzee termite foraging enlighten our understanding of early hominin tool use not only by modeling the cognitive ability of our ancestors but also by emphasizing the possible role of social insects in the hominin diet. The chimpanzees of the Goualougo Triangle are known to have one of the largest and most complex tool repertoires reported for wild chimpanzees. One tool set habitually used by this population includes a perforating tool to penetrate the hard outer crust of elevated termite nests before fishing for termite prey with an herbaceous stem. Here, we report the variation present in the grips used on the perforating tool. Our analysis of video recordings of chimpanzee visitation to termite nests over a 3‐year period shows that these chimpanzees use a variety of grips to navigate the challenges encountered in opening a termite nest. For situations in which the soil is most hardened, perforating requires force and a power grip is often used. When the soil in the passageway is loose, precision grips are suitable for the task. One of the preferred grips reported here is an interdigital brace, which has previously been described in studies of how some people hold a pencil. In this study, for the first time, the interdigital brace has been thoroughly described for chimpanzees. The various strategies and grips used during perforation emphasize the importance of termites as a nutritional resource that should be considered more strongly as a food used by early hominins. Am J Phys Anthropol 157:252–259, 2015. © 2015 Wiley Periodicals, Inc

Archaeology · Biology · Digging · Foraging · Geography · Nest (protein structural motif) · Perforation · Population · Sociology · Animal Vocal Communication and Behavior · Demography · Ecology · Engineering · Human-Animal Interaction Studies · Primate Behavior and Ecology

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