International Journal of Primatology

, Volume 17, Issue 3, pp 355–387 | Cite as

Seasonally and site specificity of mechanical dietary patterns in two malagasy lemur families (Lemuridae and Indriidae)

  • Nayuta Yamashita


Relationships between tooth morphology and physical food properties are well established. Because food breakdown is initiated by the dentition, one may posit that variations in tooth form are related functionally to the physical demands placed on them by the diet. Yet classification of diets as leaves, fruits,and insects does not adequately describe foods in mechanically significant ways. Furthermore, physical dietary properties have not been well quantified. I describe patterns of two physical food properties — hardness and shear strength — in the diets of five lemur taxa in Madagascar— Propithecus diadema edwardsi, Lemur fulvus rufus, and Lemur rubriventer—in the rain forest site of Ranomafana National Park and Propithecus v. verreauxiand Lemur cattaat the dry forest site of Beza Mahafaly special reserve. I compared mean plant values for each lemur taxon, the most stressful foods eaten and the amount of time spent feeding on each dietary item. Variation in food hardness is a site phenomenon with fluctuations within sites. Shear strength is strongly seasonal. Lemur diets, as traditionally classified, are not mechanically uniform since frugivores and folivores could be separated on the basis of the physical properties of their foods. Finally, I assign taxa to dietary categories that are mechanically descriptive and derive several predictions regarding expected tooth morphologies from them.

Key words

diet physical food properties hardness shear strength lemurs 


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  1. Albrecht, G. H., Jenkins, P. D., and Godfrey, L. R. (1990), Ecogeographic size variation among the living and subfossil prosimians of Madagascar.Am. J. Primatol 22: 1–50.CrossRefGoogle Scholar
  2. Boag, P. T., and Grant, P. R. (1981). Intense natural selection in a population of Darwin’s finches Geospizinae) in the Galapagos.Science 214: 82–84.PubMedCrossRefGoogle Scholar
  3. Coley, P. D. (1983). Herbivory and defensive characteristics of tree species in a lowland tropical forest.EcoL Monogr. 53: 209–233.CrossRefGoogle Scholar
  4. Coley, P. D. (1987). Interspecific variation in plant anti-herbivore properties: The role of habitat quality and rate of disturbance.New Phytol. (Suppl.) 106: 251–263.CrossRefGoogle Scholar
  5. Feeny, P. (1970). Seasonal changes in oak leaf tannins and nutrients as a cause of spring feeding by winter moth caterpillars.Ecology 51: 565–581.CrossRefGoogle Scholar
  6. Freeman, P. W. (1979). Specialized insectivory: Beetle-eating and moth-eating molossid bats.J. Mammal. 60: 467–479.CrossRefGoogle Scholar
  7. Freeman, P. W. (1988). Frugivorous and animalivorous bats (Microchiroptera): Dental and cranial adaptations,Biol. J. Linn. Soc. 33: 249–272.Google Scholar
  8. Ganzhorn, J. U. (1988). Food partitioning among Malagasy primates.Oecologia 75: 436–450.CrossRefGoogle Scholar
  9. Happel, R. (1988). Seed-eating by West African cercopithecines, with reference to the possible evolution of bilophodont molars.Am. J. Phys. Anthropol. 75: 303–327.PubMedCrossRefGoogle Scholar
  10. Hemingway, C, (1995).Feeding and Reproductive Strategies of the Milne-Edwards’ Sifaka, Propithecus diadema edwardsi, Ph.D thesis, Duke University, Durham, NC.Google Scholar
  11. Hylander, W. L. (1975). Incisor size and diet in Anthropoids with special reference to Cercopithecidae,Science 189: 1095–1097.PubMedCrossRefGoogle Scholar
  12. Kay, R. F. (1975). The functional adaptations of primate molar teeth.Am. J. Phys. Anthropol. 43: 195–216.PubMedCrossRefGoogle Scholar
  13. Kay, R. F. (1977). The evolution of molar occlusion in the Cercopithecidae and early catarrhines.Am. J. Phys. Anthropol. 46: 327–352.PubMedCrossRefGoogle Scholar
  14. Kay, R. F. (1978). Molar structure and diet in extant Ceropithecidae. In Butler, P. M., and Joysey, K. A. (eds.),Development, Function and Evolution of Teeth, Academic Press, New York, pp. 309–339.Google Scholar
  15. Kay, R. F. (1981). The nut-crackers—a new theory of the adaptations of the Ramapithecinae.Am. J. Phys. Anthropol. 55: 141–151.CrossRefGoogle Scholar
  16. Kay, R. F., and Hylander, W. L. (1978). The dental structure of mammalian folivores with special reference ot Primates and Phalangeroidea (Marsupialia). In Montgomery, G. G. (ed.,).The Ecology of Arboreal Folivores, Smithsonian Institution Press, Washington, DC, pp. 173–191.Google Scholar
  17. Kay, R. F., Sussman, R. W., and Tattersall, I. (1978). Dietary and dental variations in the genusLemur.Am. J. Phys. Anthropol. 49: 119–128.PubMedCrossRefGoogle Scholar
  18. Kiltie, R. A. (1981). The function of interlocking cannines in rain forest peccaries.J. Mammal. 62: 459–469.CrossRefGoogle Scholar
  19. Kinzey, W. G. (1978). Feeding behavior and molar features in two species of titi. In Chivers, D. J., and Herbert, J. (eds.),Recent Advances in Primatology, Vol. 1. Behaviour, Academic Press, London, pp. 373–385.Google Scholar
  20. Kinzey, W. G. (1992). Dietary and dental adaptatios in the Pitheciinae.Am. J. Phys. Anthropol. 88: 499–514.PubMedCrossRefGoogle Scholar
  21. Kinzey, W. G., and Norconk, M. A. (1990). Hardness as a basis of fruit choice in two sympatric primates.Am. J. Phys. Anthropol. 81: 5–15.PubMedCrossRefGoogle Scholar
  22. Kinzey, W. G., and Norconk, M. A. (1993). Physical and chemical properties of fruit and seeds eaten byPithecia andChiropotes in Surinam and Venezuela.Int. J. Primatol. 14: 207–227.CrossRefGoogle Scholar
  23. Lucas, P. W. (1979). The dental-dietary adaptations of mammals.N. Jb. Palaont. Mh. 8: 486–512.Google Scholar
  24. Lucas, P. W., and Luke, D. A. (1984). Chewing it over: Basic principles of food breakdown. In Olivers, D. J., Wood, B. A. and Bilsborough, A. (eds.),Food Acquisition and Processing in Primates, Plenum Press, New York, pp. 283–301.Google Scholar
  25. Lucas, P. W., and Teaford, M. (1993). Functional morphology of colobine teeth. In Davies, A. G., and Oakes, J. F. (eds.),Colobine Monkeys: Their Evolutionary Ecology, Cambridge University Press, Cambridge, pp. 173–203.Google Scholar
  26. Lucas, P. W., Choong, M. F., Tan, H. T. W., Turner, I. M., and Berrick, A. J. (1991). The fracture tougthness of the leaf of the dicotyledonCalophyllum inophyllum L. (Guttiferae).PM. Trans. R. Soc. Lond. B. 334: 95–106.CrossRefGoogle Scholar
  27. Maier, W. (1984). Tooth morphology and dietary specialization. In Chivers, D. J., Wood, B. A., and Bilsborough, A. (eds.),Food Acquisition and Processing in Primates, Plenum Press, New York, pp. 303–330.Google Scholar
  28. Martin, R. D. (1972). Adaptive radiation and behaviour of the Malagasy lemurs.Phil. Trans. Roy. Soc. London Ser. B Biol. Sci. 264: 295–352.CrossRefGoogle Scholar
  29. Meyers, D. M., and Wright, P. C. (1993). Resource tracking: Food availability andPropithecus seasonal reproducton. In Kappeler, P. M., and Ganzhorn, J. U. (eds.),Lemur Social Systems and Their Ecological Basis, Plenum Press, New York, pp. 179–192.Google Scholar
  30. Mohsenin, N. N. (1970). Application of engineering techniques to evaluation of texture of solid food materials.J. Text. Stud. 1: 133–154.CrossRefGoogle Scholar
  31. Nash, L. T. (1986). Dietary, behavioral and morphological aspects of gummivory in primates.Yrbk. Phys. Anthropol. 29: 113–138.CrossRefGoogle Scholar
  32. Overdorff, D. J. (1992). Differential patterns in flower feeding inEulemur fulvus rufus andEulemur rubriventer in Madagascar.Am. J. Primatol. 28: 191–203.CrossRefGoogle Scholar
  33. Overdorff, D. J. (1993). Similarities, differences, and seasonal patterns in the diets ofEulemur rubriventer andEulemur fulvus rufus in the Ranomafana National Park, Madagascar.Int. J. Primatol. 14: 721–753.CrossRefGoogle Scholar
  34. Richard, A. F. (1978). Variability in the feeding behavior of a Malagasy prosimian,Propithecus verreawa: Lemuriformes. In Montgomery, G. G. (ed.),The Ecology of Arboreal Folivores, Smithsonian Institution Press, Washington, DC, pp. 519–533.Google Scholar
  35. Rosenberger, A. L. (1992). Evolution of feeding niches in New World Monkeys.Am. J. Phys. Anthropol. 88: 525–562.PubMedCrossRefGoogle Scholar
  36. Rosenberger, A. L., and Kinzey, W. G. (1976). Functional patterns of molar occlusion in platyrrhine primates.Am J. Phys. Anthropol. 45: 281–298.PubMedCrossRefGoogle Scholar
  37. Seligsohn, D. (1977). Analysis of species-specific molar adaptations in Strepsirhine primates.Contr. Primatol. 11: 1–116.Google Scholar
  38. Seligsohn, D., and Szalay, F. S. (1978). Relationship between natural selection and dental morphology: Tooth function and diet inLepilemur andHapalemur. In Butler, P. M., and Joysey, K. A. (eds.),Development, Function and Evolution of Teeth, Academic Press, New York, pp. 289–307.Google Scholar
  39. Strait, S. G. (1993). Molar morphology and food texture among small-bodied insectivorous mammals.J. Mammal. 74: 391–402.CrossRefGoogle Scholar
  40. Sussman, R. W. (1991). Demography and social organization of free-rangingLemur catta in the Beza Mahafaly Reserve, Madagascar.Am. J. Phys. Anthropol. 84: 43–58.CrossRefGoogle Scholar
  41. Sussman, R. W., and Rakotozafy, A. (1994). Plant diversity and structural analysis of a tropical dry forest in southwestern Madagascar.Biotropica 26: 241–254.CrossRefGoogle Scholar
  42. Tattersall, I. (1982).The Primates of Madagascar, Columbia University Press, New York.Google Scholar
  43. Tattersall, I., and Sussman, R. W. (1975). Observations on the ecology and behavior of the mongoose lemurLemur mongoz mongoz Linnaeus (Primates, Lemuriformes), at Ampijoroa, Madagascar.Anthropol. Papers Am. Mus. Nat. Hist. 52: 193–216.Google Scholar
  44. van Roosmalen, M. G. M. (1984). Subcategorizing foods in primates. In Olivers, D. J., Wood, B. A., and Bilsborough, A. (eds.),Food Acquisition and Processing in Primates, Plenum Press, New York, pp. 167–175.Google Scholar
  45. Vincent, J. F. V. (1990).Structural Biomaterials, rev. ed., Princeton University Press, Princeton, N.JGoogle Scholar
  46. Voisey, P. W. (1976). Engineering assessment and critique of instruments used for meat tenderness evaluation.J. Text. Stud. 7: 11–48.CrossRefGoogle Scholar
  47. 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
  48. Yamashita, N. (1992). Mechanical variation in the diets of four Malagasy primates.Am. J. Phys. Anthropol (Suppl.) 14: 176–177.Google Scholar
  49. Yamashita, N. (1994). Patterns of mechanical dietary properties in two Malagasy lemur families.Am. J. Phys. Anthropol (Suppl.) 18: 212.Google Scholar

Copyright information

© Plenum Publishing Corporation 1996

Authors and Affiliations

  • Nayuta Yamashita
    • 1
  1. 1.Department of AnthropologyNorthwestern UniversityEvanston

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