, Volume 36, Issue 1, pp 91–100 | Cite as

Retardation of bone development in the Koshima troop of Japanese macaques

  • Tasuku Kimura
  • Yuzuru Hamada


Retardation of bone development was observed in the Koshima troop of free ranging Japanese macaques. In the control group, epiphyseal unions of appendicular long bones generally started to close at about 4 yrs of age and were completed at about 8 or 9 yrs of age. Limb bone unions of the Koshima troop, however, started to close at about 9 yrs of age and completely closed at about 15 yrs of age. In the epiphyseal unions of trunk and girdle bones, the Koshima troop again showed a retardation of closure compared with the control group. Until long bones reached their full length, that is, until about 15 yrs of age, their size was small in the Koshima troop compared with the control group, though the sample size of the Koshima troop was small. After 15 yrs of age, however, many osteometrical measurements of the Koshima troop were nearly the same as controls. A prolonged growing duration compensated for the slow growth and allowed them to become as large as controls. This prolongation may be an adaptation in response to small size during the developmental period.

In some parts of the body, however, Koshima macaques failed to reach the adult size of controls. Males were less likely than females to reach full size. Causes of the retardation and small size in the Koshima troop are discussed, but they remain open to further studies.

Key Words

Macaca fuscata Koshima troop Growth Retardation Body size Epiphyseal union 


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  1. Hamada, Y., 1994. Standard growth and variation of growth patterns in the Japanese monkeys (Macaca fuscata) based on the analysis by the spline function method.Anthropol. Sci., 102 (Suppl.): 57–76.Google Scholar
  2. ————,M. Iwamoto, &T. Watanabe, 1986. Somatometrical features of Japanese monkeys in the Koshima islet: in viewpoint of somatometry, growth, and sexual maturation.Primates, 27: 471–484.CrossRefGoogle Scholar
  3. Itoigawa, N., T. Tanaka, N. Ukai, H. Fujii, T. Kurokawa, T. Koyama, A. Ando, Y. Watanabe, &S. Imakawa, 1992. Demography and reproductive parameters of a free ranging group of Japanese macaques (Macaca fuscata) at Katsuyama.Primates, 33: 49–68.CrossRefGoogle Scholar
  4. Iwamoto, M., T. Watanabe, &Y. Hamada, 1987. Eruption of permanent teeth in Japanese monkeys (Macaca fuscata).Primate Res., 3: 18–28.Google Scholar
  5. Kimura, T., 1994. Age changes of postcranial skeleton in adult Japanese macaques.Anthropol. Sci., 102 (Suppl.): 27–41.Google Scholar
  6. ———— &Y. Hamada, 1990. Development of epiphyseal union in Japanese macaques of known chronological age.Primates, 31: 79–93.CrossRefGoogle Scholar
  7. Koyama, N., Y. Takahata, M. A. Haffman, K. Norikoshi, &H. Suzuki, 1992. Reproductive parameters of female Japanese macaques: thirty years data from the Arashiyama troops, Japan.Primates, 33: 33–47.CrossRefGoogle Scholar
  8. Martin, R., 1928.Lehrbuch der Anthropologie, II Band. Gustav Fischer, Jena.Google Scholar
  9. Mori, A., 1979. Analysis of population changes by measurement of body weight in the Koshima troop of Japanese monkeys.Primates, 20: 371–379.Google Scholar
  10. Stewart, T. D., 1979.Essentials of Forensic Anthropology. Charles C. Thomas, Springfield.Google Scholar
  11. Tanner, J., R. H. Whitehouse, N. Cameron, W. A. Marshall, M. J. R. Hearly, &H. Goldstein, 1983.Assessment of Skeletal Maturity and Prediction of Adult Height (TW2 Method). (2nd ed.), Academic Press, London.Google Scholar
  12. ————,M. E. Wilson, &C. G. Rudman, 1990. Pubertal growth spurt in the female rhesus monkey relation to menarche and skeletal development.Amer. J. Human Biol., 2: 922–934.Google Scholar
  13. Watanabe, K., A. Mori, &M. Kawai, 1992. Characteristic features of the reproduction of Koshima monkeys,Macaca fuscata fuscata: a summary of thirty-four years of observation.Primates, 33: 1–32.CrossRefGoogle Scholar

Copyright information

© Japan Monkey Centre 1995

Authors and Affiliations

  • Tasuku Kimura
    • 1
  • Yuzuru Hamada
    • 2
  1. 1.Primate Research InstituteKyoto UniversityAichiJapan
  2. 2.Faculty of ScienceOkayama University of ScienceOkayamaJapan

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