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Primates

, Volume 33, Issue 2, pp 151–162 | Cite as

New records of within-group infanticide and cannibalism in wild chimpanzees

  • Miya Hamai
  • Toshisada Nishida
  • Hiroyuki Takasaki
  • Linda A. Turner
Article

Abstract

Two cases of within-group infanticide and cannibalism were observed among the M Group chimpanzees of the Mahale Mountains, Tanzania. In both cases, victimized infants were male, 5 – 6 months of age, and in good health when killed. Four to five years have passed since the mothers of the victims immigrated into M Group as nulliparous immigrants. In one case the 2nd-ranking male was observed to detach the infant from the mother's belly. Both infants were finally killed by the alpha male after several adult males scrambled for the bodies. There was no evidence that the mothers had mated with males other than those of M Group. Nor was there evidence that the mothers had restrictive mating relationships with some of the M Group adult males. What little evidence is available shows that the mothers had mated mostly with adolescent and other immature males during their conception cycles. However, at least in one case, the mother began to mate more with adult males rather than with immature males after the infanticide. It is proposed that the function of within-group male infanticide can be explained by the male-male competition hypothesis developed for hanuman langurs and other nonhuman primates.

Key Words

Chimpanzee Infanticide Cannibalism Mahale Mountains 

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References

  1. Andelman, S. J., 1987. Evolution of concealed ovulation in vervet monkeys (Cercopithecus aethiops).Amer. Naturalist, 129: 785–799.CrossRefGoogle Scholar
  2. Goodall, J., 1986.The Chimpanzees of Gombe. Patterns of Behavior. Harvard Univ. Press, Cambridge, Massachusetts.Google Scholar
  3. Hasegawa, T., 1989. Sexual behavior of immigrant and resident female chimpanzees at Mahale. In:Understanding Chimpanzees,P. Heltne, &L. A. Marquardt (eds.), Harvard Univ. Press, Cambridge, Massachusetts, pp. 90–103.Google Scholar
  4. ———— &M. Hiraiwa-Hasegawa, 1983. Opportunistic and restrictive matings among wild chimpanzees in the Mahale Mountains, Tanzania.J. Ethol., 1: 75–85.CrossRefGoogle Scholar
  5. Hiraiwa-Hasegawa, M., 1987. Infanticide in primates and a possible case of male-biased infanticide in chimpanzees. In:Animal Societies: Theories and Facts,Y. Ito,J. L. Brown, &J. Kikkawa (eds.), Japan Scientific Societies Press, Tokyo, pp. 125–139.Google Scholar
  6. ————, 1992. Cannibalism among nonhuman primates. In:Cannibalism: Ecology and Evolution Among Diverse Taxa,M. Elgar (ed.), Oxford Univ. Press, Oxford. (in press)Google Scholar
  7. ————,T. Hasegawa, &T. Nishida, 1984. Demographic study of a large-sized unit-group of chimpanzees in the Mahale Mountains, Tanzania: A preliminary report.Primates, 25: 401–413.Google Scholar
  8. Hrdy, S. B., 1979. Infanticide among animals: A review, classification, and examination of the implications for the reproductive strategies of females.Ethol. & Sociobiol., 1: 13–40.Google Scholar
  9. Kawanaka, K., 1981. Infanticide and cannibalism in chimpanzees, with special reference to the newly observed case in the Mahale Mountains.Afr. Study Monogr., 1: 69–99.Google Scholar
  10. Masui, K., 1986. An infant chimpanzee was captured and lethally injured by the first-ranking male. Mahale Mountains Chimpanzee Research Project, Ecol. Rep. No. 46. (unpublished manuscript)Google Scholar
  11. Nishida, T. &M. Hiraiwa-Hasegawa, 1985. Reponses to a stranger mother-son pair in the wild chimpanzee: A case report.Primates, 26: 1–13.Google Scholar
  12. ————, ————,T. Hasegawa, &Y. Takahata, 1985. Group extinction and female transfer in wild chimpanzees in the Mahale National Park, Tanzania.Z. Tierpsychol., 67: 284–301.Google Scholar
  13. ———— &K. Kawanaka, 1985. Within-group cannibalism by adult male chimpanzees.Primates, 26: 274–284.Google Scholar
  14. ————,H. Takasaki, &Y. Takahata, 1990. Demography and reproductive profiles. In:The Chimpanzees of the Mahale Mountains: Sexual and Life History Strategies,T. Nishida (ed.), Univ. of Tokyo Press, Tokyo, pp. 63–97.Google Scholar
  15. ————,S. Uehara, &R. Nyundo, 1979. Predatory behavior among wild chimpanzees of the Mahale Mountains.Primates, 20: 1–20.Google Scholar
  16. Norikoshi, K., 1982. One observed case of cannibalism among wild chimpanzees of the Mahale Mountains.Primates, 23: 66–74.Google Scholar
  17. Spijkerman, R. P., J. A. R. A. M. van Hooff, &W. Jens, 1990. A case of lethal infant abuse in an established group of chimpanzees.Folia Primatol., 55: 41–44.PubMedGoogle Scholar
  18. Takahata, Y., 1985. Adult male chimpanzees kill and eat a male newborn infant: Newly observed intragroup infanticide and cannibalism in Mahale National Park, Tanzania.Folia Primatol., 44: 161–170.Google Scholar
  19. Takasaki, H., 1985. Female life history and mating patterns among the M group chimpanzees of the Mahale National Park, Tanzania.Primates, 26: 121–129.Google Scholar
  20. Uehara, S., T. Nishida, M. Hamai, T. Hasegawa, H. Hayaki, M. A. Huffman, K. Kawanaka, S. Kobayashi, J. C. Mitani, Y. Takahata, H. Takasaki, &T. Tsukahara, 1992. Characteristics of predation by the chimpanzees in the Mahale Mountains National Park, Tanzania. In:Proceedings of the XIIIth Simposium International Primatological Society,T. Nishida,W. C. McGrew,P. Marler,M. Pickford, &F. B. M. de Waal (eds.), Univ. of Tokyo Press, Tokyo, pp. 143–158.Google Scholar

Copyright information

© Japan Monkey Centre 1992

Authors and Affiliations

  • Miya Hamai
    • 1
  • Toshisada Nishida
    • 2
  • Hiroyuki Takasaki
    • 3
  • Linda A. Turner
    • 2
  1. 1.Department of Anthropology, Faculty of ScienceThe University of TokyoTokyoJapan
  2. 2.Department of Zoology, Faculty of ScienceKyoto UniversityKyotoJapan
  3. 3.The Center for African Area StudiesKyoto UniversityKyotoJapan

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