International Journal of Primatology

, Volume 21, Issue 3, pp 477–495 | Cite as

Effect of Seasonality on the Behavior of an Insectivorous Primate, Tarsius spectrum

  • Sharon Gursky


The distribution and quality of food resources is generally recognized as the preeminent factor explaining much interspecific and intraspecific variation in the behavior of nonhuman primates. Primates that live in seasonal environments often show predictable responses to fluctuating resources. In order to compensate for the reduction in resource availability, primates variously switch to alternative, poorer quality food sources, increase the amount of time they spend foraging, or increase their daily path length. Some primate species reduce their group size or maximize the group dispersion. I address whether spectral tarsiers (Tarsius spectrum), which are insectivores, modify their behavior in the same ways as frugivores and folivores in response to seasonal or scarce resources. My results indicate that wild spectral tarsiers modify their activity budget in response to seasonal resources. Specifically, during periods of low resource availability, spectral tarsier males and females spent more time traveling and foraging compared to their activity budget during the wet season. Males and females not only increased the amount of time they spent foraging during times of low resource abundance but also modified their foraging behavior. During the wet season, when resource abundance was high, they consumed Orthoptera and Lepidoptera with greater frequency than during the dry season. During the dry season, when resource abundance was low, spectral tarsiers still ate numerous Orthoptera and Lepidoptera, but they also increased consumption of Coleoptera and Hymenoptera. Spectral tarsiers were also more likely to be involved in territorial disputes during the dry season than during the wet season. Intragroup encounters decreased in frequency in the dry season versus the frequency of encounters during the wet season.

prosimian haplorrhine tarsiidae territoriality intragroup encounter 


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  1. Altmann, J. (1974). Observational study of behavior: Sampling methods. Behaviour 49: 227-267.Google Scholar
  2. Altmann, J. (1980). Baboon Mothers and Infants, Cambridge University Press, Cambridge.Google Scholar
  3. Altmann, J., and Samuels, A. (1992). Costs of maternal care: Infant carrying in baboons. Behav. Ecol. Sociobiol. 29: 391-398.Google Scholar
  4. Anderson, C. (1981). Subtrooping in a chacma baboon (Papio ursinus) population. Primates 23: 445-458.Google Scholar
  5. Bibby, R., Southwood, T., and Cairns, P. (1992). Techniques for Estimating Population Density in Birds, Academic Press, New York.Google Scholar
  6. Boinski, S. (1987). Habitat use by squirrel monkeys (Saimiri oerstedi) in Costa Rica. Folia Primatol. 49: 151-167.Google Scholar
  7. Boinski, S., and Fowler, N. (1989). Seasonal patterns in a tropical lowland forest. Biotropica 21: 223-233.Google Scholar
  8. Brower, J., Zar, J., and von Ende, C. (1990). Field and Laboratory Methods for General Ecology, Wm. C. Brown, Dubuque, Iowa.Google Scholar
  9. Buskirk, R., and Buskirk, W. (1976). Changes in arthropod abundance in a highland Costa Rican forest. Am. Midl. Nat. 95: 288-298.Google Scholar
  10. Caldecott, J. (1986). Mating patterns, societies and the ecogeography of macaques. Anim. Behav. 34: 208-220.Google Scholar
  11. Chapman, C., and Chapman, L. (1990). Dietary variability in primate populations. Primates 31: 121-128.Google Scholar
  12. Charnov, E. (1976). Optimal foraging: The marginal value theorem. Theor. Popul. Biol. 9: 129-136.Google Scholar
  13. Clutton-Brock, T. H. (1975). Ranging behavior of red colobus (Colobus badius tephrosceles) in the Gombe National Park. Folia Primatol. 19: 368-379.Google Scholar
  14. Clutton-Brock, T. H., and Harvey, P. H. (1977). Primate ecology and social organization. J. Zool. Lond. 183: 1-39.Google Scholar
  15. Crompton, R. (1984). Foraging, habitat structure and locomotion in two species of Galago. In Rodman, P., and Cant, J. (eds.), Adaptations for Foraging in Nonhuman Primates, Columbia University Press, New York.Google Scholar
  16. Dawson, G. (1976). Behavioral Ecology of the Panamanian Tamarin, Saguinus oedipus (Callitrichidae, Primates), University Microfilms International, Ann Arbor, Michigan.Google Scholar
  17. Doran, D. (1997). Influence of seasonality on activity patterns, feeding behavior, ranging, and grouping patterns in Tai chimpanzees. Int. J. Primatol. 18(2): 183-207.Google Scholar
  18. Dunbar, R. (1988). Primate Social Systems, Cornell University Press, Ithaca, New York.Google Scholar
  19. Garber, P. (1991). Seasonal variation in diet and ranging patterns in two species of tamarin monkeys. Am. J. Phys. Anthropol. (Suppl.) 12: 75.Google Scholar
  20. Gursky, S. (1997). Modeling maternal time budgets: The impact of lactation and gestation on the behavior of the spectral tarsier, Tarsius spectrum. Ph.D. Dissertation, Doctoral Program in Anthropological Sciences, SUNY-Stony Brook.Google Scholar
  21. Gursky, S. L. (1995). Group size and composition in the spectral tarsier, Tarsius spectrum: Implications for social organization. Trop. Biodivers. 3(1): 57-62.Google Scholar
  22. Gursky, S. L. (in press). The conservation status of the spectral tarsier, Tarsius spectrum: Data on home range and population density. Folia Primatol. Google Scholar
  23. Harcourt, C. S. (1986). Seasonal variation in the diet of South African galagos. Int. J. Primatol 7: 491-506.Google Scholar
  24. Hladik, C. (1977). A comparative study of the feeding strategies of two sympatric species of leaf monkeys: Presbytis senex and Presbytis entellus. In Clutton-Brock, T. H. (ed.), Primate Ecology, Academic Press, New York, pp. 324-353.Google Scholar
  25. Iwamoto, T., and Dunbar, R. (1983). Thermoregulation, habitat quality and the behavioral ecology of gelada baboons. J. Anim. Ecol. 52: 357-366.Google Scholar
  26. Izawa, K. (1978). A field study of the ecology and behaviour of the black mantle tamarin (Saguinus nigricollis). Primates 19(2): 241-274.Google Scholar
  27. Janzen, D. (1973). Sweep samples of tropical foliage insects: Effects of seasons, vegetation types, elevation, time of day and insularity. Ecology 54(3): 687-708.Google Scholar
  28. Janzen, D., and Schoener, T. (1968). Differences in insect abundance and diversity between wetter and drier sites during a tropical dry season. Ecology 49: 96-110.Google Scholar
  29. Kavanagh, M. (1978). The diet and feeding behavior of Cercopithecus aethiops tantalus. Folia Primatol 30: 30-63.Google Scholar
  30. Kenward, R. (1987). Wildlife Radio Tagging, Academic Press, New York.Google Scholar
  31. Kinnaird, M. (1992). Variable resource defense by the Tana River crested mangabey. Behav. Ecol. Sociobiol. 31: 115-122.Google Scholar
  32. Kinnaird, M., and O'Brien, T. (1993). Species list of trees found within Tangkoko Nature Reserve, unpublished.Google Scholar
  33. Lee, P. (1984). Ecological constraints on the social development of vervet monkeys. Behaviour 91: 245-261.Google Scholar
  34. MacArthur, R., and Pianka, E. (1966). On optimal use of a patchy environment. Am. Nat. 100: 603-609.Google Scholar
  35. MacKinnon, J., and MacKinnon, K. (1980). The behavior of wild spectral tarsiers. Int. J. Primatol. 1: 361-379.Google Scholar
  36. Muirhead-Thomson, R. C. (1991). Trap Responses of Flying Insects, Academic Press, New York.Google Scholar
  37. Niemitz, C. (1984). The Biology of Tarsiers, Gustav Fischer, Stuttgart.Google Scholar
  38. Post, D. (1981). Activity patterns of yellow baboons (Papio cynocephalus) in the Amboseli National Park, Kenya. Anim. Behav. 29: 357-374.Google Scholar
  39. Raemakers, J. (1979). Ecology of sympatric gibbons. Folia Primatol. 31: 227-245.Google Scholar
  40. Raemakers, J. (1980). Causes of variation between months in the distance travelled daily by gibbons. Folia Primatol. 34: 46-60.Google Scholar
  41. Remis, M. (1997). Western lowland gorillas (Gorilla gorilla gorilla) as seasonal frugivores: Use of variable resources. Am. J. Primatol. 43: 87-109.Google Scholar
  42. Richard, A. (1978). Behavioral Variation: A Case Study of a Malagasy Lemur, Bucknell University Press, Lewisburg, Pennsylvania.Google Scholar
  43. Richard, A. (1985). Primates in Nature, Freeman, San Fransisco.Google Scholar
  44. Robinson, J. (1986). Seasonal variation in the use of time and space by the wedge capped capuchin monkey, Cebus olivaceous: Implications for a foraging theory. Smithson. Contrib. Zool. 431: 1-60.Google Scholar
  45. Sokal, R., and Rohlf, J. (1981). Biometry, Freeman, New York.Google Scholar
  46. Southwood, T. R. E. (1992). Ecological Methods with Particular Reference to the Study of Insect Populations, Chapman and Hall, New York.Google Scholar
  47. Struhsaker, T. (1967). Ecology of vervet monkeys (Cercopithecus aethiops) in the Masai-Amboseli game reserve, Kenya. Ecology 48: 891-904.Google Scholar
  48. Tanaka, L., and Tanaka, S. (1982). Rainfall and seasonal changes in arthropod abundance on a tropical ocean island. Biotropica 14: 114-123.Google Scholar
  49. White, G., and Garrott, R. (1987). Analysis of Wildlife Radiotracking Data, Academic Press, New York.Google Scholar
  50. Whitten, P. L. (1982). Female reproductive strategies among vervet monkeys. Ph.D.Dissertation, Harvard University, Cambridge, Massachusetts.Google Scholar
  51. Whitten, T., Mustafa, M., and Henderson, G. (1987). The Ecology of Sulawesi, Gadjah Mada University Press, Yogyakarta.Google Scholar
  52. World Wildlife Fund. (1980). Cagar Alam Gunung Tangkoko Dua Saudara Sulawesi Utara Management Plan 1981-1986. Bogor, Indonesia.Google Scholar
  53. Wrangham, R. (1980). An ecological model of female primate groups. Behaviour 75: 262-300.Google Scholar
  54. Yopneda, M. (1984). Ecological study of the saddle-backed tamarin (Saguinus fuscicollis) in northern Bolivia. Primates 25: 414-442.Google Scholar

Copyright information

© Plenum Publishing Corporation 2000

Authors and Affiliations

  • Sharon Gursky
    • 1
  1. 1.Department of AnthropologyCUNY-Queens CollegeFlushing

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