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Primates

, Volume 27, Issue 2, pp 151–172 | Cite as

Ecology and behavior ofPresbytis thomasi in Northern Sumatra

  • Kunkun Jaka Gurmaya
Article

Abstract

A field study of 23 bisexual troops, ranging in size from 3 to 21 members (\(\bar x\)=8), and two all-male groups of the Thomas's leaf monkey (Presbytis thomasi) was conducted in North Sumatra from November 1981 to April 1984. Most troops (N=19 or 82.6%) contained only one adult male. Two troops and one group were most intensively studied. The home range was 12.3–15.7 ha for the two bisexual troops, and only 1.7 ha for the one, all-male, ten-member group. Fruits composed more than 50% of their diets. Vocalizations were classified into 13 types. Births occurred at any time of the year. Among three males of a bisexual troop, serious fights were observed: two males died of wounds and the former beta male became the new alpha male. After this social change, the home range area of this troop gradually shifted eastward. But, 3.5 months after the social change, a 9-month-old infant male stayed alone in the western part of its former range. Thereafter, he became a solitary male and sometimes went into the riverine area of the Bohorok river. The occurrence of male replacement suggests instability of multi-male organization in bisexual troops. Moreover, the different mortality rate between males and females and the unequal sex ratios forced by the formation of one-male troops, maintained high tension levels among males competing on females.

Key Words

Presbytis thomasi Ecology Behavior Social change Killing 

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References

  1. Altmann, J., 1974. Observational study of behavior: sampling methods.Behaviour, 49: 227–267.PubMedGoogle Scholar
  2. Bernstein, I. S., 1968. TheLutong of Kuala Selangor.Behaviour, 32: 1–16.Google Scholar
  3. Boggess, J., 1979. Troop male membership changes and infant killing in Langurs (Presbytis entellus).Folia Primatol., 32: 65–107.PubMedGoogle Scholar
  4. Brotoisworo, E., 1979. The Lutung (Presbytis cristata) in Pangandaran Nature Reserve: social adaptation to space. Ph.D. thesis, Kyoto Univ., Kyoto.Google Scholar
  5. Chasen, F. N., 1940. A handlist of Malaysian mammals.Bull. Raffles Mus., 15: 1–209.Google Scholar
  6. Chivers, D. J., 1974.The Siamang in Malaya: a Field Study of a Primate in Tropical Rain Forest. Contributions to Primatology, Vol. 4, S. Karger, Basel.Google Scholar
  7. Curtin, S. H., 1977. Niche Separation in Sympatric Malaysian Leaf-monkeys (Presbytis obscura andPresbytis melalophos).Yb. Phys. Anthropol., 20: 421–439.Google Scholar
  8. ————, 1980. Dusky and banded leaf monkeys. In:Malayan Forest Primates: Ten Years' Study in Tropical Rain Forest,D. J. Chivers (ed.), Plenum Press, New York & London, pp. 107–145.Google Scholar
  9. Furuya, Y., 1961–2. The social life of silvered leaf monkeys,Trachypithecus cristatus.Primates, 3(2): 41–60.CrossRefGoogle Scholar
  10. Lindburg, D. J., 1971. The rhesus monkey in India: an ecological and behavioral study. In:Primate Behavior: Developments in Field and Laboratory Research, Vol. 2,L. A. Rosenblum (ed.), Academic Press, pp. 1–106.Google Scholar
  11. MacKinnon, J. R. &K. MacKinnon, 1980. Niche differentiation in a primate community. In:Malayan Forest Primates: Ten Years' Study in Tropical Rain Forest,D. J. Chivers (ed.), Plenum Press, New York & London, pp. 167–190.Google Scholar
  12. Medway, L., 1970. The monkeys of Sundaland. In:Old World Monkeys: Evolution, Systematics, and Behavior,J. R. Napier &P. H. Napier (eds.), Academic Press, New York, pp. 513–553.Google Scholar
  13. Mohnot, S. M., 1971. Some aspects of social changes and infant-killing in the hanuman langur,Presbytis entellus (Primates: Cercopithecidae), in Western India.Mammalia, 35: 175–198.Google Scholar
  14. Pocock, R. I., 1934. The monkeys of the generaPithecus (orPresbytis) andPygathrix found to the east of the Bay of Bengal.Proc. Zool. Soc. Lond., 2: 895–961.Google Scholar
  15. Poirier, F. E., 1970. Dominance structure of the Nilgiri Langur (Presbytis johnii) of South India.Folia Primatol., 12: 161–186.PubMedGoogle Scholar
  16. Rijksen, H. D., 1978.A Field Study on Sumatran Orang-utans (Pongo pygmaeus abeliiLesson 1827). H. Veeman & Zonen BV, Wageningen.Google Scholar
  17. Ripley, S., 1967. Intertroop encounters among Ceylon gray langurs (Presbytis entellus). In:Social Communication among Primates,S. A. Altmann (ed.), Chicago Univ. Press, pp. 237–253.Google Scholar
  18. Ruhiyat, Y., 1983. Socio-ecological study ofPresbytis aygula in West Java.Primates, 24: 344–359.CrossRefGoogle Scholar
  19. Sugiyama, Y., 1965. On the social change of hanuman langurs (Presbytis entellus) in their natural condition.Primates, 6: 381–418.Google Scholar
  20. ----, 1967. Social organization of hanuman langurs. In:Social Communication among Primates,S. A. Altmann (ed.), Chicago Univ. Press, pp. 221–236.Google Scholar
  21. ————,K. Yoshiba, &M. D. Parthasarathy, 1965. Home range, mating season, male group, and inter-troop in hanuman langurs (Presbytis entellus).Primates, 6: 73–106.Google Scholar
  22. Tanaka, J., 1965. Social structure of Nilgiri langurs.Primates, 6: 107–122.CrossRefGoogle Scholar
  23. van Schaik, C. P., M. A. van Noordwijk, B. Warsono, &E. Sutriono, 1983. Party size and early detection of predators in Sumatran forest primates.Primates, 24: 211–221.CrossRefGoogle Scholar
  24. Vandenberg, J. G., 1967. The development of social structure in free-ranging rhesus monkeys.Behaviour, 29: 179–194.Google Scholar
  25. Vogel, C. & H. Loch, 1984. Reproductive parameters, adult-male replacements, and infanticide among free-ranging langurs (Presbytis entellus) at Jodhpur (Rajasthan), India. In:Infanticide: Comparative and Evolutionary Perspectives,G. Hausfater & S. B. Hrdy (eds.), Aldine, pp. 237–255.Google Scholar
  26. Wilson, C. C. &W. L. Wilson, 1976. Behavioral and morphological variation among primate populations in Sumatra.Yb. Phys. Anthropol., 20: 207–233.Google Scholar
  27. Wilson, W. L. &C. C. Wilson, 1975. Species-specific vocalizations and the determination of phylogenetic affinities of thePresbytis aygula-melalophos group in Sumatra. In:Contemporary Primatology,S. Kondo,M. Kawai, &A. Ehara (eds.), S. Karger, Basel, pp. 459–463.Google Scholar
  28. Wolf, K. E. &J. G. Fleagle, 1977. Adult male replacement in a group of silvered leaf monkeys (Presbytis cristata) at Kuala Selangor, Malaysia.Primates, 18: 949–955.CrossRefGoogle Scholar
  29. Yoshiba, K., 1968. Local and intertroop valiability in ecology and social behavior of common Indian langurs. In:Primates: Studies in Adaptation and Variability,P. C. Jay (ed.), Holt, Rinehart, & Winston, New York, pp. 217–242.Google Scholar

Copyright information

© Japan Monkey Centre 1986

Authors and Affiliations

  • Kunkun Jaka Gurmaya
    • 1
  1. 1.Department of Biology, Faculty of Mathematics and Natural SciencePadjadjaran UniversityBandungIndonesia

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