Abstract
A new type of tool-using behavior was observed in a group of wild chimpanzees (Pan troglodytes verus) at Bossou, Guinea. The chimpanzees used the leaf-petiole of oil-palm trees (Elaeis guineensis) as a pounding tool to deepen a hole in the oil-palm crown which appeared after the chimpanzees had pulled out the central young shoots. Finally, the chimpanzees extracted and ate the apical meristem or apical bud of the oil-palm tree which is edible but inaccessible without such tool use. The motor pattern which the chimpanzees employed is similar to that used for termite-nest digging but it is more exaggerated and requires great force. The behavior is reminiscent of pestlepounding. The chimpanzees exploit substantial amounts of food with this tool-using skill, compensating for insufficient fruit foods in the primary forest. This tool-using behavior was first observed in 1990 and, to date, almost half of the group members have been confirmed to use the pestle tool. It appears that this tool-using behavior was invented recently and has since spread widely throughout the group as a habitual one.
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References
Albrecht, H. &S. C. Dunnett, 1971.Chimpanzees in Western Africa. Piper, Munchen.
Altmann, J., 1974. Observational study of behavior: sampling methods.Behaviour, 49: 227–267.
Boesch, C. &H. Boesch, 1983. Optimization of nut-cracking with natural hammers by wild chimpanzees.Behaviour, 83: 265–286.
———— & ————, 1990. Tool use and tool making in wild chimpanzees.Folia Primatol., 54: 86–99.
————,P. Marchesi, N. Marchesi, B. Fruth, &F. Joulian, 1994. Is nut cracking in wild chimpanzees a cultural behavior?J. Human Evol., 26: 325–338.
Clement, C. R., R. M. Manshardt, J. DeFrank, F. Zee, &P. Ito, 1993. Introduction and evaluation of Pejibaye (Bactris gasipaes) for palm heart production in Hawaii. In:New Crops,J. Janick &J. E. Simon (eds.), John Wiley & Sons, New York, pp. 465–472.
Fay, J. M. &R. W. Carrol, 1994. Chimpanzee tool use for honey and termite extraction in Central Africa.Amer. J. Primatol., 34: 309–317.
Goodall, J., 1964. Tool-using and aimed throwing in a community of free-living chimpanzees.Nature, 201: 1264–1266.
Goodall, J. van Lawick, 1970. Tool-using in primates and other vertebrates. In:Advances in the Study of Behaviour, Vol. 3,D. S. Lehman,R. A. Hinde, &E. Shaw (eds.), Academic Press, London, pp. 195–249.
————, 1986.The Chimpanzees of Gombe: Patterns of Behavior. Harvard Univ. Press, Cambridge, Massachusetts.
Hartley, C. W. S., 1988.The Oil Palm (3rd ed.). Longman, London.
Hoppe-Dominik, B., 1991. Distribution and status of chimpanzees (Pan troglodytes verus) on the Ivory Coast.Prim. Rep., 31: 45–75.
Jones, C. &J. Sabater Pi, 1969. Sticks used by chimpanzees in Rio Muni, West Africa.Nature, 223: 100–101.
Jones, D., 1984.Palms in Australia. Reed Books, New South Wales.
Kortlandt, A. &E. Holzhaus, 1987. New data on the use of stone tools by chimpanzees in Guinea and Liberia.Primates, 28: 473–496.
Matsuzawa, T., 1994. Field experiments on use of stone tools in the wild. In:Chimpanzee Cultures,R. W. Wrangham,W. C. McGrew,F. B. M. de Waal, &P. G. Heltne (eds.), Harvard Univ. Press, Cambridge, Massachusetts, pp. 351–370.
---- &G. Yamakoshi, in press. Comparison of chimpanzee material culture between Bossou and Nimba, West Africa. In:Reaching into Thought: The Mind of the Great Apes,A. E. Russon, K. A. Bard, & S. Parker (eds.), Cambridge Univ. Press, Cambridge.
McGrew, W. C., 1992.Chimpanzee Material Culture: Implications for Human Evolution. Cambridge Univ. Press, Cambridge.
———— &C. E. G. Tutin, 1978. Evidence for a social custom in wild chimpanzees?Man (n.s.), 13: 234–251.
Muroyama, Y., 1991. Chimpanzees’ choices of prey between two sympatric species of Macrotermes in the Campo Animal Reserve, Cameroon.Human Evol., 6: 143–151.
Nishida, T. &S. Uehara, 1980. Chimpanzees, tools, and termites: another example from Tanzania.Curr. Anthropol., 21: 671–672.
Sabater Pi, J., 1974. An elementary industry of the chimpanzees in the Okorobiko Mountains, Rio Muni (Republic of Equatorial Guinea), West Africa.Primates, 15: 351–364.
Sakura, O. &T. Matsuzawa, 1991. Flexibility of wild chimpanzee nut-cracking behavior using stone hammers and anvils: an experimental analysis.Ethology, 87: 237–248.
Sugiyama, Y., 1981. Observation on the population dynamics and behavior of wild chimpanzees at Bossou, Guinea, 1979–1980.Primates, 22: 435–444.
————, 1985. The brush-stick of chimpanzees found in south-west Cameroon and their cultural characteristics.Primates, 26: 361–374.
————, 1988. Grooming interactions among adult chimpanzees at Bossou, Guinea, with special reference to social structure.Int. J. Primatol., 9: 393–407.
————, 1989. Population dynamics of chimpanzees at Bossou, Guinea. In:Understanding Chimpanzees,P. G. Heltne &L. G. Marquardt (eds.), Harvard Univ. Press, Cambridge, Massachusetts, pp. 134–145.
————, 1991. Habitat isolation and population structure of wild chimpanzees in and around Bossou, West Africa. In:Wildlife Conservation: Present Trends and Perspectives for the 21st Century,N. Maruyama,B. Bobek,W. Regelin,L. Bartos, &P. R. Ratcliffe (eds.), Japan Wildlife Research Center, Tokyo, pp. 32–35.
————, 1993. Local variation of tools and tool use among wild chimpanzee populations. In:The Use of Tools by Human and Non-human Primates,A. Berthelet &J. Chavaillon (eds.), Clarendon Press, Oxford, pp. 175–187.
————, 1994. Tool use by wild chimpanzees.Nature, 367: 327.
----, in press. Drinking-tools of wild chimpanzees at Bossou.Amer. J. Primatol., 37.
————,T. Fushimi, O. Sakura, &T. Matsuzawa, 1993. Hand preference and tool use in wild chimpanzees.Primates, 34: 151–159.
————,S. Kawamoto, O. Takenaka, K. Kumazaki, &N. Miwa, 1993. Paternity discrimination and inter-group relationships of chimpanzees at Bossou.Primates, 34: 545–552.
———— &J. Koman, 1979. Tool-using and making behavior in wild chimpanzees at Bossou, Guinea.Primates, 20: 513–524.
———— & ————, 1987. A preliminary list of chimpanzees’ alimentation at Bossou, Guinea.Primates, 28: 133–147.
———— & ————, 1992. The flora of Bossou: it’s utilization by chimpanzees and humans.Afr. St. Monogr., 13: 127–169.
————, ————, &M. B. Sow, 1988. Ant-catching wands of wild chimpanzees at Bossou, Guinea.Folia Primatol., 51: 56–60.
Suzuki, S., S. Kuroda, &T. Nishihara, 1995. Tool-set for termite-fishing by chimpanzees in the Ndoki Forest, Congo.Behaviour, 132: 219–235.
Uehara, S., 1982. Seasonal changes in the techniques employed by wild chimpanzees in the Mahale Mountains, Tanzania, to feed on termites (Pseudacanthotermes spiniger).Folia Primatol., 37: 44–76.
Wrangham, R. W., 1975. The behavioral ecology of chimpanzees in Gombe National Park, Tanzania, Ph.D. thesis, Univ. of Cambridge, Cambridge.
————, 1986. Ecology and social relationships in two species of chimpanzees. In:Ecological Aspects of Social Evolution: Birds and Mammals,D. I. Rubenstein &R. W. Wrangham (eds.), Princeton Univ. Press, Princeton, pp. 352–378.
————,A. P. Clark, &G. Isabirye-Basuta, 1992. Female social relationships and social organization of Kibale Forest chimpanzees. In:Topics in Primatology, Vol. 1: Human Origins,T. Nishida,W. C. McGrew,P. Marler,M. Pickford, &F. B. M. de Waal (eds.), Univ. Tokyo Press, Tokyo, pp. 81–98.
Yamakoshi, G. &T. Matsuzawa, 1993. Preliminary surveys of the chimpanzees in the Nimba Reserve, Côte d’Ivoire.Prim. Res., 9: 13–17. (in Japanese with English summary)
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Yamakoshi, G., Sugiyama, Y. Pestle-pounding behavior of wild chimpanzees at Bossou, Guinea: A newly observed tool-using behavior. Primates 36, 489–500 (1995). https://doi.org/10.1007/BF02382871
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DOI: https://doi.org/10.1007/BF02382871