NDLI: Leaf-tool use for drinking water by wild chimpanzees (Pan troglodytes): acquisition patterns and handedness

Content Provider	Springer Nature Link
Author	Sousa, Cláudia Biro, Dora Matsuzawa, Tetsuro
Copyright Year	2009
Abstract	Chimpanzees (Pan troglodytes) are known to make and use a variety of tools, activities which require them to employ their hands in a skilful manner. The learning process underlying the acquisition of tool-using skills, and the degree of laterality evident in both immature and mature performers are investigated here focusing on the use of leaves for drinking water by members of the Bossou chimpanzee community in Guinea, West Africa. In addition, comparisons are drawn between the present findings and our previous data on the cracking of oil-palm nuts (Elaeis guineensis) using stone tools by members of the same community. The use of leaves for drinking water emerges approximately 2 years earlier than nut cracking, at around the age of 1.5 years, although the manufacture of leaf tools begins only at 3.5 years of age. In addition, in clear contrast with nut cracking, the majority of chimpanzees are ambidextrous in their use of leaves, with only certain individuals showing a bias for one hand. We discuss possible explanations for the earlier emergence and increased ambidextrousness that characterises leaf-tool use in comparison with other forms of tool use by wild chimpanzees. In summary, our results provide the first detailed description of the acquisition process underlying leaf-tool use along with the accompanying patterns of handedness, while also being the first to provide comparisons of the development of different forms of tool use within the same wild chimpanzee population.
Starting Page	115
Ending Page	125
Page Count	11
File Format	PDF
ISSN	14359448
Journal	Animal Cognition
Volume Number	12
Issue Number	1
e-ISSN	14359456
Language	English
Publisher	Springer-Verlag
Publisher Date	2009-08-21
Publisher Place	Berlin, Heidelberg
Access Restriction	Subscribed
Subject Keyword	Chimpanzees (Pan troglodytes verus) Tool use Drinking water with leaves Learning Laterality Zoology Behavioural Sciences Human Physiology Evolutionary Biology
Content Type	Text
Resource Type	Article
Subject	Experimental and Cognitive Psychology Ecology, Evolution, Behavior and Systematics

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