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Behavioral Assessment of Manual Dexterity in Non-Human Primates

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Published on: November 11, 2011

Identifying functional and regional differences in chimpanzee stone tool technology.

Tomos Proffitt¹, Jonathan S Reeves¹, Soiret Serge Pacome²

¹Technological Primates Research Group, Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, 04103 Leipzig, Germany.

Royal Society Open Science

|September 23, 2022

Summary

Researchers analyzed chimpanzee stone tools used for nut-cracking, revealing distinct damage patterns on hammers and anvils. This study enhances our understanding of early hominin tool use and primate material culture.

Keywords:

Palaeolithic archaeology nut-cracking percussive technology primate archaeology stone tools

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Area of Science:

Primate Archaeology
Paleoanthropology
Archaeological Science

Background:

Earliest hominin sites reveal stone tools for cutting and pounding.
Pounding tools are increasingly recognized for their importance in early hominin behavior.
Limited research exists on characterizing chimpanzee stone tools for comparative analysis.

Purpose of the Study:

To characterize chimpanzee nut-cracking stone tools from Djouroutou using a primate archaeological approach.
To enable meaningful comparisons between chimpanzee tool use and archaeological artifacts.
To investigate regional variation in chimpanzee material culture.

Main Methods:

Techno-typological analysis of stone tools.
Two- and three-dimensional measurement of tool damage.
Comparative analysis with other wild chimpanzee populations and Plio-Pleistocene percussive technology.

Main Results:

Identified clear differences in damage location and extent between hammerstones and anvils at Djouroutou.
Demonstrated distinct tool use patterns within the Djouroutou chimpanzee population.
Highlighted variations when compared to other chimpanzee groups.

Conclusions:

Chimpanzee stone tool use exhibits regional and material cultural differences.
Percussive artifact function can be challenging to determine from morphology alone.
This research provides a new dataset for understanding early hominin percussive technology.