Human Evolution

, Volume 3, Issue 4, pp 297–308

Abortions in free ranging Hanuman langurs (Presbytis entellus) — a male induced strategy?

  • G. Agoramoorthy
  • S. M. Mohnot
  • V. Sommer
  • A. Srivastava
Article

Abstract

During a 10-year long term study, 6 eye-witnessed and 1 pressumed cases of abortions occurred in 3 one-male bisexual troops of free ranging langurs (Presbytis entellus) near Jodhpur, Rajasthan, India. The age of the unborns varied from 35 to about 200 days. The subsequent birth interval ranged between 7.1–21.1 months. 2 miscarriages occurred during stable periods of residency of a single male. 5 cases occurred prior to or after infanticide in connection with male changes. In one case a female was attacked by the new male before she aborted. In one case a female presumably aborted after attacks on her semiweaned infant. Most of the reproductive losses hence seem to be related to psychical and physical stress exerted by new males on pregnant females. As part of their reproductive strategy, males reduce their waiting time to insemination in this way. Abortions may likewise represent an adaptive reproductive strategy of females, who prefer to abort instead of investing in a foetus which is likely to be killed after birth.

Key words

Presbytis entellus Reproductive strategies Abortion Infanticide 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Agoramoorthy G. &Mohnot S. M., 1988.Infanticide and juvenilicide in Hanuman langurs (Presbytis entellus) around Jodhpur, India. Human Evolution, 3: 279–296.Google Scholar
  2. Berger J., 1983.Induced Abortion and Social Factors in Wild Horses. Nature, 303: 59–61.CrossRefGoogle Scholar
  3. Bruce H. M., 1960.A Block to Pregnancy in the House Mouse caused by the Proximity of Strange Males. Journal of Reproduction and Fertility, 1: 96–103.CrossRefGoogle Scholar
  4. Fossey D., 1983.Gorillas in the Mist. Richard Clay Ltd, Bungay.Google Scholar
  5. Goodall J., 1986.The Chimpanzees of Gombe. Patterns of Behavior. Belknap Press, Cambridge, Mass.Google Scholar
  6. Hrdy S. B., 1974.Male-Male Competition and Infanticide among the Langurs (Presbytis entellus) of Abu, Rajasthan. Folia primatologica, 22: 19–58.Google Scholar
  7. Labov J. B., 1984.Infanticidal Behaviour in Male and Female Rodents: Sectional Introduction and Directions for Future Research. In: G. Hausfater and S. B. Hrdy, eds. Infanticide: Comparative and Evolutionary Perspectives, pp. 237–255. Aldine Publishing Company, New York.Google Scholar
  8. Makwana S. C., 1979.Infanticide and Social Change in Two Groups of the Hanuman langur (Presbytis entellus) at Jodhpur. Primates, 20: 293–300.CrossRefGoogle Scholar
  9. 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.CrossRefGoogle Scholar
  10. Mohnot S. M., Agoramoorthy G. &Rajpurohit L. S., 1986.Male Takeovers inducing Abortions in the Hanuman langur, Presbytis entellus. Primate Report, 14: 208.Google Scholar
  11. Nash L. T., 1974.Parturition in a Feral Baboon. Primates, 15: 279–285.CrossRefGoogle Scholar
  12. Newton P., 1986.Infanticide in an Undisturbed Forest Population of Hanuman langurs, Presbytis entellus. Animal Behaviour, 34: 785–789.CrossRefGoogle Scholar
  13. Packer C. &Pusey A. E., 1984.Infanticide in carnivores. In: G. Hausfater and S. B. Hrdy, eds. Infanticide: Comparative and Evolutionary Perspectives, pp. 237–255. Aldine Publishing Company, New York.Google Scholar
  14. Parthasarathy M. D. & Rahaman H. 1974.Infant Killing and Dominance Assertion among the Hanuman langurs. Vth Congress of the International Primatological Society, August 21–24, 1974, in Nagoya, Japan: 35 (abstract).Google Scholar
  15. Paul A. &Küster J., 1987.Sex Ration Manipulation in a Seasonally Breeding Primate Species: Evidence from the Barbary Macaque Population at Affenberg Salem. Ethology, 74: 117–132.CrossRefGoogle Scholar
  16. Pereira M. E., 1983.Abortion following-the Immigration of an Adult Male Baboon (Papio cynocephalus). American Journal of Primatology, 4: 93–98.CrossRefGoogle Scholar
  17. Ramaswami L. S., 1975.Some Aspects of the Reproductive Biology of the Langur Monkey Presbytis entellus entellus Dufresne. Proceedings of the Indian National Science Academy, B41: 1–30.Google Scholar
  18. Sackett G. P., Holm R. A., Davis A. E. &Fahrenbruck C. E., 1975.Prematurity and Low Birth Weight in Pigtail Macaques: Incidence, Prediction and Effects on Infant Development. In: S. Kondo, M. Kawai; A. Ehara and S. Kawamura eds. Proceedings from the Symposia of the Fifth Congress of the International Primatological Society, pp. 189–205. Japan Science Press, Tokyo.Google Scholar
  19. Shostak M., 1981.The Life and Words of a Kung Woman. Harvard University Press, Cambridge, Mass.Google Scholar
  20. Small M. S., 1982.Reproductive Failure in Macaques. American Journal of Primatology, 2: 137–148.CrossRefGoogle Scholar
  21. Sommer V., 1987.Infanticide among Free-Ranging Langurs (Presbytis entellus) at Jodhpur (Rajasthan/India): Recent Observations and a Reconsideration of Hypotheses. Primates, 28: 163–197.CrossRefGoogle Scholar
  22. Sommer V., 1988.Male Competition and Coalitions in Langurs (Presbytis entellus) at Jodhpur, Rajastan, India. Human Evolution, 3: 261–278.Google Scholar
  23. Sommer V. &Mohnot S. M., 1985.New Observations on Infanticides among Hanuman langurs (Presbytis entellus) near Jodhpur (Rajasthan/India). Behavioral ecology and Sociobiology, 16: 245–248.CrossRefGoogle Scholar
  24. Sugiyama Y., 1965a.Behavioural Development and Social Structure in two Troops of Hanuman langurs (Presbytis entellus). Primates, 6: 213–247.CrossRefGoogle Scholar
  25. Sugiyama Y., 1965b.On the Social Change of Hanuman langurs (Presbytis entellus) in their Natural Condition. Primates, 6: 381–418.CrossRefGoogle Scholar
  26. Sugiyama Y., 1966.An Artificial Social Change in a Hanuman langur troop (Presbytis entellus). Primates, 7: 41–72.CrossRefGoogle Scholar
  27. Vogel C. &Loch H., 1984.Reproductive Parameters, Adult-Male Replacements, and Infanticide among Free-Ranging Langurs (Presbytis entellus) at Jodhpur (Rajasthan), India. In: G. Hausfater and S. Blaffer Hrdy, eds. Infanticide: Comparative and Evolutionary Perspectives, pp. 237–256. Aldine Publishing Company, New York.Google Scholar
  28. Vom Saal F. S., 1984.Proximate and Ultimate Causes of Infanticide and Parental Behavior in Male House Mice. In: G. Hausfater and S. Blaffer Hrdy, eds. Infanticide: Comparative and Evolutionary Perspectives, pp. 401–424. Aldine Publishing Company, New York.Google Scholar
  29. Winkler P., 1981.Zur Öko-Ethologie freilebender Hanuman-Languren (Presbytis entellus entellus Dufresne, 1797) in Jodhpur (Rajasthan). Indien. Unpublished Ph. D. thesis. University of Göttingen, Göttingen.Google Scholar
  30. Winkler P., Loch H. &Vogel C., 1984.Life History of Hanuman langurs (Presbytis entellus): reproductive Parameters, Infant Mortality, and Troop Development. Folia primatologica, 43: 1–23.CrossRefGoogle Scholar

Copyright information

© Editrice Il Sedicesimo 1988

Authors and Affiliations

  • G. Agoramoorthy
    • 1
  • S. M. Mohnot
    • 1
  • V. Sommer
    • 2
  • A. Srivastava
    • 1
  1. 1.Department of ZoologyUniversity of JodhpurJodhpurIndia
  2. 2.Institut für Anthropologie der Georg-August-UniversitätGöttingenFederal Republic of Germany

Personalised recommendations