Abstract
The mental map of wild chimpanzees is analyzed in the context of their transports of clubs and stones used for cracking two species of nuts of different hardness,Coula edulis andPanda oleosa, in the Tai National Park (Ivory Coast). For the harderPanda nuts, they transport the harder hammers, i.e., almost exclusively stones, hammers of greater weight, and the transports are longer than forCoula nuts. The analysis made for the transports forPanda nuts shows that they seem to remember the location of stones and to choose the stones so as to keep the transport distance minimal. The chimpanzees seem to possess an Euclidian space, which allows them to somehow measure and remember distances; to compare several such distances so as to choose the stone with the shortest distance to a goal tree; to correctly locate a new stone location with reference to different trees; and to change their reference point so as to measure the distance to eachPanda tree from any stone location. They also combine the weight and the distance. The wild chimpanzees of the Tai National Park seem to possess concrete operation abilities in spatial representation.
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References
Boesch, C. &H. Boesch, 1981. Sex differences in the use of natural hammers by wild chimpanzees: A preliminary report.J. Human Evol., 10: 583–593.
———— & ————, 1983. Optimization of nut cracking with natural hammers by wild chimpanzees.Behaviour, 3/4: 265–286.
---- & ----, in press. Possible causes of sex differences in the use of natural hammers by wild chimpanzees.
Dasen, P., 1975. Concrete operational development in three cultures.J. Cross-cult. Psychol., 6(2): 156–172.
———— &A. Heron, 1981. Cross-cultural tests of Piaget's theory. In:Handbook of Cross-cultural Psychology—Developmental Psychology, Vol. 4,H. Triandis &A. Heron (eds.), Allyn & Bacon, Boston, pp. 295–341.
Davenport, R., 1979. Some behavioral disturbance of great apes in captivity. In:The Great Apes—Perspectives on Human Evolution, Vol. 5,D. Hamburg &E. McCown (eds.), Benjamin/Cummings, Menlo Park, pp. 341–357.
Hall, A., J. Braggio, J. Buchanan, R. Nadler, D. Karan &B. Sams, 1980. Multiple classification performance of juvenile chimpanzees, normal children and retarded children.Int. J. Primatol., 1(4): 345–359.
Menzel, E., 1973. Chimpanzee spatial memory organization.Science, 182: 943–945.
————, 1974. A group of young chimpanzees in a 1-acre field. In:Behavior of Non-human Primates, Vol. 3,A. Schrier &F. Stollnitz (eds.), Academic Press, New York, pp. 83–153.
————, 1978. Cognitive mapping in chimpanzees. In:Cognitive Processes in Animal Behavior,S. Hulse,H. Fowler &W. Honig (eds.), Erlbaum, Hillsdale, pp. 375–422.
————, 1979. Communications of object-locations in a group of young chimpanzees. In:The Great Apes—Perspectives on Human Evolution, Vol. 5,D. Hamburg &E. McCown (eds.), Benjamin/Cummings, Menlo Park, pp. 359–371.
Piaget, J. &B. Inhelder, 1972.La Représentation de l'Espace chez l'Enfant (2nd ed.). Presse Univ. de France, Paris.
————, ———— &A. Szeminska, 1973.La Géométrie Spontanée de l'Enfant (2nd ed.). Presse Univ. de France, Paris.
Siegel, S., 1956.Non Parametric Statistics. McGraw Hill, New York.
Woodruff, G., D. Premack &K. Kennel, 1978. Conservation of liquid and solid quantity by the chimpanzee.Science, 202: 991–994.
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Boesch, C., Boesch, H. Mental map in wild chimpanzees: An analysis of hammer transports for nut cracking. Primates 25, 160–170 (1984). https://doi.org/10.1007/BF02382388
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DOI: https://doi.org/10.1007/BF02382388