Chimpanzee bipedal locomotion in the Gombe National Park, East Africa
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An adult male chimpanzee in the natural habitat has been observed to walk predominantly bipedally after a total forelimb paralysis in 1966. The major differences from previously described bipedal chimpanzee gait are (1) one third of the femoral extension is posterior to the hip joint in propulsion, (2) excursion of the swinging foot is close to midline, due to adduction of the lower hindlimb in swing and propulsive phases, (3) depressed pelvic tilt is on the side of the swinging limb, (4) thoracic vertebrae rotate and are vertical and erect, and (5) there is only a moderate lateral sway of the midline. This locomotory complex is interpreted as individual variability and suggests an evolutionary model for the origin of hominid bipedal locomotion.
KeywordsEvolutionary Model Natural Habitat Animal Ecology Individual Variability Thoracic Vertebra
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- Albrecht, H. &S. C. Dunnett, 1971.Chimpanzees in Western Africa. R. Piper & Co., Munchen.Google Scholar
- Bauer, H. R., 1976. Ethological aspects of Gombe chimpanzee aggregations with implications for hominization. PH.D. dissertation, Stanford University.Google Scholar
- Elftman, H., 1944. The bipedal walking of the chimpanzee.J. Mammal., 25: 67–71.Google Scholar
- Goodall, J., 1975. Chimpanzee behavior. In:Hominisation und Verhalten,I. Eibl-Eibesfeldt (ed.), Gustav Fisher V.Google Scholar
- Hewes, G. W., 1961. Food transport and the origin of hominid bipedalism.Amer. Anthrop., 63: 687–710.Google Scholar
- Napier, J., 1964. The evolution of bipedal walking in the hominids.Arch. Biol., 75: 673–708.Google Scholar
- Robinson, J. T., 1972.Early Hominid Posture and Locomotion. Chicago University Press.Google Scholar
- Tuttle, R. H., 1970. Postural, propulsive and prehensile capabilities in the cheiridia of chimpanzees and other great apes. In:The Chimpanzee,G. H. Bourne (ed.), Vol. 2, S. Karger, pp. 178–253.Google Scholar
- van Lawick-Goodall, J., 1968. The behavior of the free-living chimpanzees of the Gombe Stream Reserve.Anim. Behav. Monogr., 1: Part 3.Google Scholar
- Wrangham, R. W., 1974. Artificial feeding of chimpanzees and baboons in their natural habitat.Anim. Behav., 22: 83.Google Scholar
- Zihlman, A. L. &W. S. Hunter, 1972. A biomechanical interpretation of the pelvis ofAustralopithecus.Folia primat., 18: 1–19.Google Scholar