International Journal of Primatology

, Volume 15, Issue 1, pp 29–59 | Cite as

Feeding behavior, mastication, and tooth wear in the western tarsier (Tarsius bancanus)

  • Nina G. Jablonski
  • Robin H. Crompton
Article

Abstract

We assessed feeding and masticatory function in western tarsiers, Tarsius bancanus,from field study, from videotaped recordings of the feeding and chewing behavior of wild-caught animals in temporary captivity, from dissections of the muscles of mastication, and from scanning electron microscopic (SEM) examination of wear features of the teeth. Ingestion of large items of animal prey is made possible by the animal’s extremely wide gape. Anterior translation of the knob-like mandibular condyle in the anteroposteriorly elongated mandibular fossa makes possible a gape angle of 60–70‡. We observed two means of ingestion of grasshopper prey: ingestion by mastication, in which the postcanine teeth sever and reduce bites of the food as it is thrust into the mouth cavity, and repeated gape-shove sequences, during which the tarsier pushed grasshoppers of large diameter into the anterior part of its mouth and attempted to sever a bite with its anterior teeth. Morsels were successfully severed after three to five such sequences, and reduced quickly,with relatively few powerful, crushing chews. The insect cuticle was not evenly comminuted during mastication. We observed a marked side-to-side grinding component in the normal chewing cycle of T. bancanuson videotape and confirmed it by SEM. The main jaw adductors are bulky, long-fibered muscles that can accommodate wide grapes and still generate, at wide degrees of gape,the high occlusal pressures necessary to fracture thick chitinous exoskeletons of the scarabid beetles that form a substantial element of the western tarsier’s diet.

Key words

tarsier Tarsius bancanus feeding behavior mastication temporomandibular joint tooth wear gape 

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References

  1. Carlson, D. S. (1977). Condylar translation and the function of the superficial masseter in the rhesus monkey (Macaca mulatto).Am. J. Phys. Anthropol. 47: 53–64.PubMedCrossRefGoogle Scholar
  2. Crompton, R. H. (1984). Foraging, habitat structure, and locomotion in two speciesof Calago. In Rodman, P. S., and Cant, J. H. (eds.),Adaptations for Foraging in Nonhuman Primates, Columbia University Press, New York, pp. 73–111.Google Scholar
  3. Crompton, R. H. (1989). Mechanisms for speciation inGalago andTarsius.Hum. Evolu. 4(2): 105–116.CrossRefGoogle Scholar
  4. Crompton, R. H., and Andau, P. M. (1986). Locomotion and habitat utilization in free-rangingTarsius bancanus: A preliminary report.Primates 27: 337–355.CrossRefGoogle Scholar
  5. Crompton, R. H., and Andau, P. M. (1987). Ranging, activity rhythms, and sociality in free-rangingTarsius bancanus: A preliminary report.Int. J. Primatol. 8: 43–71.Google Scholar
  6. Crompton, R. H., Oxnard, C. E. and Liebermann, S. S. (1987). Morphometrics and niche metrics in prosimian evolution. 1. An initial approach to measuring locomotion, habitat and diet.Am. J. Phys. Anthropol. 73: 149–177.PubMedCrossRefGoogle Scholar
  7. Crompton, R. H., Sellers, W. I., and Günther, M. M. (1993). Energetic efficiency and ecology as selective factors in the saltatory adaptation of prosimian primates.Proc. R. Soc. Lond. B. 254: 41–45.CrossRefGoogle Scholar
  8. Davis, D. D. (1962). Mammals of the lowland rain-forest of North Borneo.Bull. Singapore Nat. Mus. 31: 1–129.Google Scholar
  9. Fiedler, W. (1953). Die Kaumuskulatur der Insectivore.Acta Anal. 18: 101–175.CrossRefGoogle Scholar
  10. Gingerich, P. D., and Smith, B. H. (1985). Allomelric scaling in the dentition of primates and insectivores. In Jungers, W. L. (ed.),Size and Scaling in Primate Biology, Plenum, New York, pp. 257–272.Google Scholar
  11. Gowitzke, B. A., and Milner, M. (1988).Scientific Bases of Human Movement, 3rd ed., Williams and Wilkins, Baltimore.Google Scholar
  12. Greaves, W. S. (1974). Functional implications of mammalian jaw joint position.Forma Fund. 7: 363–376.Google Scholar
  13. Greaves, W. S. (1988). The maximum average bite force for a given length jaw.J. Zool. (Lond.) 214: 295–306.Google Scholar
  14. Herring, S. W. (1975). Actaptations for gape in the hippopotamus and its relatives.Forma Fund. 8: 85–100.Google Scholar
  15. Herring, S. W., and Herring, S. E. (1974). The superficial masseter and gape in mammals.Am. Nat. 108: 561–576.CrossRefGoogle Scholar
  16. Hill, W. C. O. (1955).Primates, Vol. 2. Haplorhini: Tarsioidea, Interscience, New York.Google Scholar
  17. Jacobs, L. L. (1984). Rodentia. In Gingerich, P. D., and Badgeley, C. E., (eds.),Mammals: Notes for a Short Course, University of Tennessee Studies in Geology 8, pp. 155–166.Google Scholar
  18. Lucas, P. W., and Luke, D. A. (1984). Chewing it over: Basic principles of food breakdown. In Chivers, D. J., Wood, B. A., and Bilsborough, A. (eds.),Food Acquisition and Processing in Primates, Plenum Press, New York, pp. 283–302.Google Scholar
  19. MacKinnon, J., and MacKinnon, K. (1980). The behavior of wild spectral tarsiers.Int. J. Primatol. 1: 361–380.CrossRefGoogle Scholar
  20. Maier, W. (1984). Functional morphology of the dentition of the Tarsiidae. In Niemitz, C. (ed.),Biology of Tarsiers, Gustav Fischer, Stuttgart, pp. 45–58.Google Scholar
  21. Musser, G. G., and Dagosto, M. (1987). The identity ofTarsius pumilus, a pygmy species endemic to the montane mossy forests of central Sulawesi.Am. Mus. Novit. 2867: 1–53.Google Scholar
  22. Niemitz, C. (1979). Outline of the behavior ofTarsius banco nus. In Doyle, G., and Martin, R. D. (eds.),The Study of Prosimian Behavior, Academic Press, London, pp. 631–660.Google Scholar
  23. Niemitz, C. (1984a). Activity rhythms and use of space in semi-wild Bornean tarsiers, with remarks on wild spectral tarsiers. In Niemitz, C. (ed.),Biology of Tarsiers, Gustav Fischer, Stuttgart, pp. 85–115.Google Scholar
  24. Niemitz, C. (1984b). An investigation and review of the territorial behaviour and social organization of the genusTarsius. In Niemitz, C. (ed.),Biology of Tarsiers, Fischer, Stuttgart, pp. 117–127.Google Scholar
  25. Niemitz, C. (1984c). Synecological relationships and feeding behaviour of the genusTarsius. In Niemitz, C. (ed.),Biology of Tarsiers, Gustav Gischer, Stuttgart, pp. 59–75.Google Scholar
  26. Niemitz, C. (1984d). Vocal communication of two tarsier species. (Tarsius bancanus andTarsius spectrum). In Niemitz, C. (ed.),Biology of Tarsiers, Gustav Fischer, Stuttgart, pp. 130–141.Google Scholar
  27. Niemitz, C. (1985). Leaping locomotion and the anatomy of the tarsier. In Kondo, S. (ed.),Primate Morphophysiology, Locomotor Analyses and Human Bipedalism, University of Tokyo Press, Tokyo, pp. 235–250.Google Scholar
  28. Oxnard, C. E., Crompton, R. H., and Liebermann, S. S. (1991).Lifestyles and Anatomies in Prosimians, Washington University Press, Seattle.Google Scholar
  29. Roberts, M., and Cunningham, B. (1986). Space and substrate use in captive western tarsiers,Tarsius bancanus.Int. J. Primatol. 7: 113–130.CrossRefGoogle Scholar
  30. Rosenberger, A. L. (1985). In favor of the necrolemur-tarsier hypothesis.Folia Primatol. 45: 179–194.Google Scholar
  31. Schmid, P. (1983). Front dentition of the Omomyiformes (Primates).Folia Primatol. 40: 1–10.PubMedCrossRefGoogle Scholar
  32. Turnbull, W. (1970). Mammalian masticatory apparatus.Fieldiana (Geol.) 18(2): 149–356.Google Scholar
  33. Vaughan, T. A. (1972).Mammalogy Saunders, Philadelphia.Google Scholar
  34. Wainwright, S. A., Biggs, W. D., Currey, J. D., and Gosline, J. M. (1982).Mechanical Design in Organisms, Princeton University Press, Princeton, NJ.Google Scholar
  35. Wood-Jones, F. (1918).Arboreal Man, Arnold, London.Google Scholar

Copyright information

© Plenum Publishing Corporation 1994

Authors and Affiliations

  • Nina G. Jablonski
    • 1
  • Robin H. Crompton
    • 2
  1. 1.Department of Anatomy and Human BiologyUniversity of Western AustraliaNedlandsWestern Australia
  2. 2.Department of Human Anatomy and Cell BiologyUniversity of LiverpoolUK

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