International Journal of Primatology

, Volume 12, Issue 6, pp 541–558 | Cite as

Handedness in wild chimpanzees

  • Christophe Boesch
Article

Abstract

The debate over nonhuman primate precursors to human handedness is unsettled mainly due to lack of data, particularly on apes. Handedness in wild chimpanzees at the Taï National Park Côte d'Ivoire, has been monitored in four tasks. For the simple unimanual ones, reaching and grooming, adults use both hands equally (ambidextrous), while for the more complex unimanual wadge-dipping and the complex bimanual nut-cracking, adults are highly lateralized. These results support the hypothesis that lateralization increases with the complexity of the task. The lateralization is constant for years for each task but may vary in an individual with respect to different tasks. For nutcracking females are more lateralized than males. The ontogeny of handedness for nut-cracking shows many variations in the tendency to use one hand and in the side preferred, until at about 10 years of age, the individual achieves her adult handedness. No population bias toward one side exists in Taï chimpanzees. No heritability of handedness between mother and offspring was observed. Human and chimpanzees handedness are compared.

Key words

chimpanzees handedness laterality ontogeny heritability 

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References

  1. Annet, M. (1987). Handedness as chance or as species characteristic.Behav. Brain Sci. 10(2): 263–264.Google Scholar
  2. Boesch, C., and Boesch, H. (1983). Optimization of nut-cracking with natural hammers by wild chimpanzees.Behaviour 83: 265–286.Google Scholar
  3. Boesch, C. and Boesch, H. (1984a). Mental map in wild chimpanzees: An analysis of hammer transports for nut cracking.Primates 25: 160–170.CrossRefGoogle Scholar
  4. Boesch, C., and Boesch, H. (1984b). Possible causes of sex differences in the use of natural hammers by wild chimpanzees.J. Hum. Evol. 13: 415–440.CrossRefGoogle Scholar
  5. Bresard, F., and Bresson, F. (1983) Handedness in Pongo and Pan troglodytes.J. Hum. Evol. 12: 59–66.CrossRefGoogle Scholar
  6. Bryden, M. P., and Steenhuis R. E. (1987). Handedness is a matter of degree.Behav. Brain Sci. 10(2): 266–267.Google Scholar
  7. Calvin, W. (1987) On evolutionary expectations of symmetry and toolmaking.Behav. Brain Sci. 10(2): 267–268.Google Scholar
  8. Fagot, J., and Vauclair, J. (1991) Manual laterality in nonhuman primates: A distinction between handedness and manual specialization,Psychol. Bull. 109(1): 76–89.PubMedCrossRefGoogle Scholar
  9. MacNeilage, P., Studdert-Kennedy, M., and Lindblom, B. (1987) Primate handedness reconsidered.Behav. Brain Sci. 10(2): 247–263.Google Scholar
  10. Marchant, L. F., and Steklis, H. D. (1986) Hand preference in a captive island group of chimpanzees (Pan troglodytes).Am. J. Primatol. 10: 301–13.CrossRefGoogle Scholar
  11. Nishida, T., and Hiraiwa, M. (1982) Natural history of a tool-using behaviour by wild chimpanzees in feeding upon wood-boring ants.J. Hum. Evol. 11: 73–99.CrossRefGoogle Scholar
  12. Siegel, S., and Castellan, N. J. (1988)Nonparametric Statistics for the Behavioral Sciences, McGraw-Hill, New York.Google Scholar
  13. Warren, J. M. (1980). Handedness and laterality in humans and other animals.Phys. Psychol. 8: 351–359.Google Scholar
  14. Warren, J. M. (1987) Primate handedness: Inadequate analysis, invalid conclusions.Behav. Brain Sci. 10(2): 288–289.CrossRefGoogle Scholar

Copyright information

© Plenum Publishing Corporation 1991

Authors and Affiliations

  • Christophe Boesch
    • 1
  1. 1.Ethology and Wildlife Research DepartmentUniversity of ZürichZürichSwitzerland
  2. 2.Institute of ZoologyUniversity of BaselBaselSwitzerland

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