Primates

, Volume 47, Issue 1, pp 6–13 | Cite as

Demographic influences on the behavior of chimpanzees

Original Article

Abstract

Recent research has revealed substantial diversity in the behavior of wild chimpanzees. Understanding the sources of this variation has become a central focus of investigation. While genetic, ecological, and cultural factors are often invoked to explain behavioral variation in chimpanzees, the demographic context is sometimes overlooked as a contributing factor. Observations of chimpanzees at Ngogo, Kibale National Park, Uganda, reveal that the size and structure of the unit group or community can both facilitate and constrain the manifestation of behavior. With approximately 150 individuals, the Ngogo community is much larger than others that have been studied in the wild. We have taken advantage of the unusual demographic structure of this community to document new and intriguing patterns of chimpanzee behavior with respect to hunting, territoriality, and male social relationships. Chimpanzees at Ngogo hunt often and with a considerable degree of success. In addition, male chimpanzees there frequently patrol the boundary of their territory and engage in repeated bouts of lethal intergroup aggression. By forming two distinct subgroups, male chimpanzees at Ngogo also develop social bonds above the level of dyadic pairs. While the sheer number of chimpanzees contributes to differences in hunting, patrolling, mating, and subgrouping at Ngogo, the demographic situation may also constrain behavioral interactions. At Ngogo, male chimpanzees who are closely related genetically through the maternal line do not appear to affiliate or cooperate with each other. Demographic constraints may be responsible for this finding. In this paper, I use these examples to illustrate how the demographic context affects the possible range of behavioral options open to individuals and ultimately contributes to the explanation of behavioral diversity in chimpanzees.

Keywords

Chimpanzee Pan troglodytes Behavior Demography 

Notes

Acknowledgements

Toshisada Nishida furnished me my first opportunity to study wild chimpanzees at Kasoje, and I am indebted to him for giving me that chance and for his subsequent support and encouragement. I am grateful to Juichi Yamagiwa for inviting me to participate in the COE Symposium honoring Toshi on the occasion of his retirement. My fieldwork at Ngogo has been sponsored by the Uganda Wildlife Authority, Uganda National Council for Science and Technology, and the Makerere University. I thank G. I. Basuta, J. Kasenene, and the staff of the Makerere University Biological Field Station for logistic support and three anonymous reviewers for their comments on the manuscript. None of the work that I have conducted at Ngogo would have been possible without the help of my friend and collaborator, David Watts. Our field research at Ngogo has been supported by grants from the Detroit Zoological Institute, L.S.B. Leakey Foundation, National Geographic Society, the NSF (SBR-9253590, BCS-0215622), University of Michigan, and Wenner-Gren Foundation to me and L.S.B. Leakey Foundation and National Geographic Society to David Watts.

References

  1. Altmann S, Altmann J (1979) Demographic constraints on behavior and social organization. In: Bernstein I, Smith EO (eds) Primate ecology and human origins. Garland STPM Press, New York, pp 47–63Google Scholar
  2. Basabose K, Yamagiwa J (1997) Predation on mammals by chimpanzees in the montane forest of Kahuzi, Zaire. Primates 38:45–56Google Scholar
  3. Boesch C (1994a) Chimpanzees-red colobus monkeys: a predator-prey system. Anim Behav 47:1135–1148CrossRefGoogle Scholar
  4. Boesch C (1994b) Cooperative hunting in wild chimpanzees. Anim Behav 48:653–667CrossRefGoogle Scholar
  5. Boesch C (1994c) Hunting strategies of Gombe and Taï chimpanzees. In: Wrangham R, McGrew W, deWaal F, Heltne P (eds) Chimpanzee cultures. Harvard University Press, Cambridge, MA, pp 77–92Google Scholar
  6. Boesch C, Boesch H (1989) Hunting behavior of wild chimpanzees in the Taï National Park. Am J Phys Anthro 78:547–573CrossRefGoogle Scholar
  7. Boesch C, Boesch-Achermann H (2000) The chimpanzees of the Taï Forest. Oxford University Press, OxfordGoogle Scholar
  8. Boesch C, Hohmann G, Marchant L (2002) Behavioral diversity in chimpanzees and bonobos. Cambridge University Press, CambridgeGoogle Scholar
  9. Busse C (1977) Chimpanzee predation as a possible factor in the evolution of red colobus monkey social organization. Evolution 31:907–911Google Scholar
  10. Busse C (1978) Do chimpanzees hunt cooperatively?. Am Nat 112:767–770CrossRefGoogle Scholar
  11. Butynski T (1990) Comparative ecology of blue monkeys (Cercopithecus mitis) in high-density and low-density subpopulations. Ecol Monogr 60:1–26Google Scholar
  12. Caro T (1994) Cheetahs of the Serengeti plains. University of Chicago Press, ChicagoGoogle Scholar
  13. Clutton-Brock T (1989) Female transfer and inbreeding avoidance in social mammals. Nature 337:70–72CrossRefPubMedGoogle Scholar
  14. Collins DA, McGrew W (1988) Habitats of three groups of chimpanzees (Pan troglodytes) in western Tanzania compared. J Hum Evol17:553–574CrossRefGoogle Scholar
  15. Darwin C (1859) On the origin of species by means of natural selection. John Murray, LondonGoogle Scholar
  16. deWaal F (1982) Chimpanzee politics. Harper and Row, New YorkGoogle Scholar
  17. Fragaszy D, Perry S (2003) The biology of traditions: models and evidence. Cambridge University Press, CambridgeGoogle Scholar
  18. Ghiglieri M (1984) The chimpanzees of the Kibale Forest. Columbia University Press, New YorkGoogle Scholar
  19. Gilby I (2004) Hunting and meat sharing among the chimpanzees of Gombe National Park, Tanzania. PhD thesis, University of Minnesota, Minneapolis, MNGoogle Scholar
  20. Goldberg T, Wrangham R (1997) Genetic correlates of social behaviour in wild chimpanzees: evidence from mitochondrial DNA. Anim Behav 54:559–570CrossRefPubMedGoogle Scholar
  21. Goldizen A (1988) Tamarin and marmoset mating systems. Trends Ecol Evol 3:36–40CrossRefGoogle Scholar
  22. Goodall J (1963) Feeding behaviour of wild chimpanzees: a preliminary report. Symp Zool Soc Lond 10:39–48Google Scholar
  23. Goodall J (1968) The behaviour of free-living chimpanzees in the Gombe stream area. Anim Behav Monogr 1:161–311Google Scholar
  24. Goodall J (1986) The chimpanzees of Gombe. Belknap Press, Cambridge, MAGoogle Scholar
  25. Goodall J, Bandora A, Bergmann E, Busse C, Matama H, Mpongo E, Pierce A, Riss D (1979) Intercommunity interactions in the chimpanzee population of the Gombe National Park. In: Hamburg D, McCown E (eds) The great apes. Benjamin/Cummings, Menlo Park, CA, pp 13–54Google Scholar
  26. Grieser-Johns B (1996) Responses of chimpanzees to habituation and tourism in the Kibale Forest, Uganda. Biol Conser 78:257–262CrossRefGoogle Scholar
  27. Herbinger I, Boesch C, Rothe H (2001) Territory characteristics among three neighboring chimpanzee communities in the Tai National Park, Cote d‘Ivoire. Int J Primatol 22:143–167CrossRefGoogle Scholar
  28. Hosaka K, Nishida T, Hamai M, Matsumoto-Oda A, Uehara S (2001) Predation of mammals by the chimpanzees of the Mahale Mountains, Tanzania. In: Galdikas B, Briggs N, Sheeran L, Shapiro G, Goodall J (eds) All apes great and small, vol 1. African apes, Kluwer Academic Publishers, New York, pp 107–130Google Scholar
  29. Jay P (1968) Primates: studies in adaptation and variability. Holt, Rinehart, Winston, New YorkGoogle Scholar
  30. Kruuk H (1972) The spotted hyena. University of Chicago Press, ChicagoGoogle Scholar
  31. Lwanga J, Butynski T, Struhsaker T (2000) Tree population dynamics in Kibale National Park, Uganda 1975–1998. Afr J Ecol 38:248–257CrossRefGoogle Scholar
  32. Matsuzawa T (2002) Chimpanzees of Bossou and Nimba 1976–2001. Primate Research Institute, Kyoto University, Inuyama, JapanGoogle Scholar
  33. McGrew W, Tutin C (1978) Evidence for a social custom in chimpanzees? Man 13:234–251Google Scholar
  34. Mitani J, Amsler S (2003) Social and spatial aspects of male subgrouping in a community of wild chimpanzees. Behaviour 140:869–884CrossRefGoogle Scholar
  35. Mitani J, Watts D (1999) Demographic influences on the hunting behavior of chimpanzees. Am J Phys Anthro 109:439–454CrossRefGoogle Scholar
  36. Mitani J, Watts D (2001) Why do chimpanzees hunt and share meat?. Anim Behav 61:915–924CrossRefGoogle Scholar
  37. Mitani J, Watts D (2003) Field research at Ngogo, Kibale National Park, Uganda, Pan Africa News 10:3–4Google Scholar
  38. Mitani J, Watts D (2005) Seasonality in hunting by nonhuman primates. In: Brockman D, van Schaik C (eds) Seasonality in primates. Cambridge University Press, Cambridge, pp 215–241Google Scholar
  39. Mitani J, Hasegawa T, Gros-Louis J, Marler P, Byrne R (1992) Dialects in wild chimpanzees? Am J Primatol 27:233–243CrossRefGoogle Scholar
  40. Mitani J, Merriwether DA, Zhang C (2000) Male affiliation, cooperation and kinship in wild chimpanzees. Anim Behav 59:885–893CrossRefPubMedGoogle Scholar
  41. Mitani J, Watts D, Pepper J, Merriwether DA (2002) Demographic and social constraints on male chimpanzee behaviour. Anim Behav 64:727–737CrossRefGoogle Scholar
  42. Morin P, Moore J, Chakraborty R, Jin L, Goodall J, Woodruff D (1994) Kin selection, social structure, gene flow, and the evolution of chimpanzees. Science 265:1193–1201PubMedGoogle Scholar
  43. Nakamura M, McGrew W, Marchant L, Nishida T (2000) Social scratch: another custom in wild chimpanzees?. Primates 41:237–248Google Scholar
  44. Newton-Fisher N (2002) Relationships of male chimpanzees in the Budongo Forest, Uganda. In: Boesch C, Hohmann G, Marchant L (eds) Behavioural diversity in chimpanzees and bonobos. Cambridge University Press, Cambridge, pp 125–137Google Scholar
  45. Newton-Fisher N, Notman H, Reynolds V (2002) Hunting of mammalian prey by Budongo Forest chimpanzees. Folia Primatol 73:281–283CrossRefPubMedGoogle Scholar
  46. Nishida T (1968) The social group of wild chimpanzees in the Mahale Mountains. Primates 9:167–224CrossRefGoogle Scholar
  47. Nishida T (1980) The leaf-clipping display: a newly discovered expressive gesture in wild chimpanzees. J Hum Evol 9:117–128CrossRefGoogle Scholar
  48. Nishida T (1983) Alpha status and agonistic alliance in wild chimpanzees (Pan troglodytes schweinfurthii). Primates 24:318–336Google Scholar
  49. Nishida T (1990) The chimpanzees of the Mahale Mountains. Tokyo Universtiy Press, TokyoGoogle Scholar
  50. Nishida T, Hosaka K (1996) Coalition strategies among adult male chimpanzees of the Mahale Mountains, Tanzania. In: McGrew W, Marchant L, Nishida T (eds) Great ape societies. Cambridge University Press, Cambridge, pp 114–134Google Scholar
  51. Nishida T, Uehara S, Nyundo R (1979) Predatory behavior among wild chimpanzees of the Mahale Mountains. Primates 20:1–20Google Scholar
  52. Nishida T, Wrangham R, Goodall J, Uehara S (1983) Local differences in plant-feeding habits of chimpanzees between the Mahale Mountains and Gombe National Park, Tanzania. J Hum Evol 12:467–480Google Scholar
  53. Nishida T, Hiraiwa-Hasegawa M, Hasegawa T, Takahata Y (1985) Group extinction and female transfer in wild chimpanzees in the Mahale Mountains National Park, Tanzania. Z Tierpsychol 67:281–301Google Scholar
  54. Nishida T, Hasegawa T, Hayaki H, Takahata Y, Uehara S (1992) Meat-sharing as a coalition strategy by an alpha male chimpanzee? In: Nishida T, McGrew W, Marler P, Pickford M, deWaal F (eds) Topics in primatology, vol 1. Human origins, Tokyo University Press, Tokyo, pp 159–174Google Scholar
  55. Nishida T, Corp N, Hamai M, Hasegawa T, Hiraiwa-Hasegawa M, Hosaka K, Hunt K, Itoh N, Kawanaka K, Matsumoto-Oda A, Mitani J, Nakamura M, Norikoshi K, Sakamaki T, Turner L, Uehara S, Zamma K (2003) Demography, female life history, and reproductive profiles among the chimpanzees of Mahale. Am J Primatol 59:99–121CrossRefPubMedGoogle Scholar
  56. Riss D, Goodall J (1977) The recent rise to the alpha rank in a population of free-living chimpanzees. Folia Primatol 27:134–151PubMedGoogle Scholar
  57. van Schaik C, Ancrenaz M, Borgen G, Galdikas B, Knott C, Singleton I, Suzuki A, Utami S, Merrill M (2003) Orangutan cultures and the evolution of material culture. Science 299:102–105CrossRefPubMedGoogle Scholar
  58. Schaller G (1972) The Serengeti lion. University of Chicago Press, ChicagoGoogle Scholar
  59. Silk J (2001) Ties that bind: the role of kinship in primate societies. In: Stone L (ed) New directions in anthropological kinship. Rowman and Littlefield Publishers Inc., Lanham, MA, pp 71–92Google Scholar
  60. Stanford C (1998) Chimpanzee and red colobus: The ecology of predator and prey. Harvard University Press, Cambridge, MAGoogle Scholar
  61. Stanford C, Wallis J, Matama H, Goodall J (1994) Patterns of predation by chimpanzees on red colobus monkeys in Gombe National Park, 1982–1991. Am J Phys Anthro 94:213–228Google Scholar
  62. Struhsaker T (1997) Ecology of an African rain forest. University Press of Florida, Gainseville, FLGoogle Scholar
  63. Sugiyama Y (1968) Social organization of chimpanzees in the Budongo Forest, Uganda. Primates 9:225–258CrossRefGoogle Scholar
  64. Sugiyama Y (2004) Demographic parameters and life history of chimpanzees at Bossou, Guinea. Am J Phys Anthro 124:154–165CrossRefGoogle Scholar
  65. Takahata Y, Hasegawa T, Nishida T (1984) Chimpanzee predation in the Mahale Mountains from August 1979 to May 1982. Int J Primatol 5:213–233Google Scholar
  66. Teleki G (1973) The predatory behavior of wild chimpanzees. Bucknell University Press, Lewisburg, PAGoogle Scholar
  67. Uehara S (1997) Predation on mammals by the chimpanzee (Pan troglodytes). Primates 38:193–214Google Scholar
  68. Uehara S, Nishida T, Hamai M, Hasegawa T, Hayaki H, Huffman M, Kawanaka K, Kobayashi K, Mitani J, Takahata Y, Takasaki H, Tsukahara T (1992) Characteristics of predation by chimpanzees in the Mahale Mountains National Park, Tanzania. In: Nishida T, McGrew W, Marler P, Pickford M, deWaal F (eds) Topics in primatology, vol 1. Human origins. Tokyo University Press, Tokyo, pp 143–158Google Scholar
  69. Wallis J (1997) A survey of reproductive parameters in the free-ranging chimpanzees of Gombe National Park. J Rep Fert 109:297–307Google Scholar
  70. Watts D (1989) Infanticide in mountain gorillas: new cases and a reconsideration of the evidence. Ethology 81:1–18Google Scholar
  71. Watts D (2002) Reciprocity and interchange in the social relationships of wild male chimpanzees. Behaviour 139:343–370CrossRefGoogle Scholar
  72. Watts D, Mitani J (2000) Infanticide and cannibalism by male chimpanzees at Ngogo, Kibale National Park, Uganda. Primates 41:357–365Google Scholar
  73. Watts D, Mitani J (2001) Boundary patrols and intergroup encounters in wild chimpanzees. Behaviour 138:299–327CrossRefGoogle Scholar
  74. Watts D, Mitani J (2002) Hunting behavior of chimpanzees at Ngogo, Kibale National Park, Uganda. Int J Primatol 23:1–28CrossRefGoogle Scholar
  75. Watts D, Mitani J, Sherrow H (2002) New cases of inter-community infanticide by male chimpanzees at Ngogo, Kibale National Park, Uganda. Primates 43:263–270PubMedGoogle Scholar
  76. Whiten A, Goodall J, McGrew W, Nishida T, Reynolds V, Sugiyama Y, Tutin C, Wrangham R, Boesch C (1999) Cultures in chimpanzees. Nature 399:682–685CrossRefPubMedGoogle Scholar
  77. Whiten A, Goodall J, McGrew W, Nishida T, Reynolds V, Sugiyama Y, Tutin C, Wrangham R, Boesch C (2001) Charting cultural variation in chimpanzees. Behaviour 138:1481–1516CrossRefGoogle Scholar
  78. Wilson M, Wrangham R (2003) Intergroup relations in chimpanzees. Ann Rev Anthro 32:363–392CrossRefGoogle Scholar
  79. Wrangham R (1975) Behavioural ecology of chimpanzees in Gombe National Park. PhD thesis, Cambridge University, CambridgeGoogle Scholar
  80. Wrangham R (1999) Evolution of coalitionary killing. Ybk Phys Anthro 42:1–30CrossRefGoogle Scholar
  81. Wrangham R (2000) Why are male chimpanzees more gregarious than mothers? A scramble competition hypothesis. In: Kappeler P (ed) Primate males. Causes and consequences of variation in group composition. Cambridge University Press, Cambridge, pp 248–258Google Scholar
  82. Wrangham R, McGrew W, deWaal F, Heltne P (1994) Chimpanzee Cultures. Harvard University Press, Cambridge, MAGoogle Scholar
  83. Yamakoshi G (1998) Dietary responses to fruit scarcity of wild chimpanzees at Bossou, Guinea: Possible implications for ecological importance of tool use. Am J Phys Anthro 106:283–295CrossRefGoogle Scholar

Copyright information

© Japan Monkey Centre and Springer-Verlag 2005

Authors and Affiliations

  1. 1.Department of AnthropologyUniversity of MichiganAnn ArborUSA

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