Abstract
I studied the process of adult male replacement and social change in two one- male troops (B20 and B21) of hanuman langurs (Presbytis entellus)at Jodhpur, India. Male-male competition lasted for about 6 months before the successful takeover of one troop (B20). During that period, five adult males from three neighboring bands (AMB7, AMB9, and AMB10) and a resident male of a neighboring troop (B21) were involved in taking over the troop. The latter male also copulated with six females during his interim residency, which suggests that he may have opportunistically maximized his mating chances with females of a neighboring group. During an intertroop interaction, a 14-month-old female infant of the other troop (B21) was fatally attacked by an adult female of the first troop and the infant eventually died. The attacker may have taken advantage of the disorganization created by male-male competition, perhaps to eliminate a future food competitor. In addition, the first troop gained an additional feeding area from the other troop’s range; it included a sleeping site and a waterhole, indicating that territorial fights during social instability may have led to the expansion of the winner’s resource area.
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Agoramoorthy, G. (1986). Recent observations on 12 cases of infanticide in Hanuman langur(Presbytis entellus) around Jodhpur, India.Primate Report 14: 207.
Agoramoorthy, G. (1992). Reproductive biology of Hanuman langur(Presbytis entellus) of Jodhpur, Western India.J. Bombay Nat. Hist. Soc. 89(1): 84–93.
Agoramoorthy, G., and Mohnot, S. M. (1988). Infanticide and juvenilicide in Hanuman langurs(Presbytis entellus) around Jodhpur.Hum. Evol. 3(4): 279–296.
Agoramoorthy, G., Mohnot, S. M., Sommer, V., and Srivastava, A. (1988). Abortions in free ranging Hanuman langurs,Presbytis entellus. Hum. Evol. 3(4): 297–308.
Altmann, J. (1974). Observational study of behavior: Sampling methods.Behaviour 49(4): 227–267.
Curtin, R. A., and Dolhinow, P. (1978). Primate social behavior in a changing world.Am. Sci. 66: 468–475.
Dolhinow, P. (1977). Normal monkeys?Am. Sci. 65: 266.
Fossey, D. (1984). Infanticide in mountain gorillas(Gorilla gorilla beringei) with comparative notes on chimpanzees. In Hausfater, G., and Hrdy, S. B. (eds.),Infanticide: Comparative and Evolutionary Perspectives, Aldine, New York, pp. 217–236.
Goodall, J. (1977). Infant killing and cannibalism in free-living chimpanzees.Folia Primatol. 28: 259–282.
Harrison, M. J. S. (1983). Territorial behavior in the green monkey,Cercopilhecus sabaeus: Seasonal defense of local food supplies.Behav. Ecol. Sociobiol. 12: 85–94.
Hausfater, G., and Hrdy, S. B. (1984).Infanticide: Comparative and Evolutionary Perspectives, Aldine, New York.
Hiraiwa-Hasegawa, M., and Hasagawa, T. (1992). Infanticide in nonhuman primates: Sexual competition or local resource competition? In Parmigiani, S. V., and Svare, B. (eds.),Protection and Abuse of Young Animals and Man, Harwood Scientific, New York (in press).
Hrdy, S. B. (1974). Male-male competition and infanticide among langurs(Presbytis entellus of Abu, Rajasthan.Folia Primatol. 22: 19–58.
Hrdy, S. B. (1977).The Langurs of Abu: Female and Male Strategies of Reproduction, Harvard University Press, Cambridge, MA.
Hrdy, S. B. (1979). Infanticide among animals: A review, classification, and examination of implications for the reproductive strategies of females.Ethol. Sociobiol. 1: 13–40.
Makwana, S. C. (1979). Infanticide and social change in two groups of hanuman langur(Presbytis entellus) at Jodhpur.Primates 20: 293–300.
Mohnot, S. M. (1971). Some aspects of social changes and infant killing in Hanuman langur(Presbylis entellus) (Primates: Cercopithecidae), in Western India.Mammalia 35: 175–198.
Mohnot, S. M. (1974).Ecology and Behavior of the Common Indian Langur, Presbytis entellus, Ph.D. thesis, University of Jodhpur, Jodhpur.
Mohnot, S. M. (1984). Some observations on all-male bands of the Hanuman langur,Presbytis entellus. In Roonwal, M. L., Mohnot, S. M., and Rathore, N. S. (eds.),Current Primate Researches, University of Jodhpur Press, Jodhpur, pp. 343–356.
National Research Council (1981).Techniques for the Study of Primate Population Ecology, National Academy Press, Washington, DC.
Newton, P. (1986). Infanticide in an undisturbed forest population of Hanuman langur,Presbytis entellus. Anim. Behav. 34: 785–789.
Rajpurohit, L. S., and Mohnot, S. M. (1988). Fate of ousted male residents of one-male bisexual troops of Hanuman langur(Presbytis enlellus) at Jodhpur, Rajasthan (India).Hum. EvoL 3(4): 309–318.
Rudran, R. (1979a). Infanticide in red howlers(Alouatta seniculus) of northern Venezuela. Paper presented at the VIth International Congress of Primatology, Banglore, India.
Rudran, R. (1979b). The demography and social mobility of a red howler(Alouatla seniculus) population in Venezuela. In Eisenberg, J. F. (ed.),Vertebrate Ecology in the Northern Neotropics, Smithsonian Institution Press, Washington, DC, pp. 107–126.
Rudran, R. (1993). Consequences of male invasions in red howlers and review of infanticide in non-human primates.Current Mammal, (in press).
Sommer, V. (1987). Infanticide among free ranging langurs(Presbytis enlellus) at Jodhpur (Rajasthan/India): Recent observation and reconsideration of hypotheses.Primates 28: 163–197.
Struhsaker, T. T., and Leyland, L. (1987). Colobines: Infanticide by adult males. In Smuts, B. B., Cheney, D. L., Seyfarth, R. M., Wrangham, R. W., and Struhsaker, T. T. (eds.),Primate Societies, Chicago University Press, Chicago, pp. 83–97.
Sugiyama, Y. (1964). Group composition, population density and some sociological observations of Hanuman langur(Presbytis entellus).Primates 5: 7–38.
Sugiyama, Y. (1965). On the social change of Hanuman langurs(Presbytis entellus) in their natural conditions.Primates 6: 381–417.
Sugiyama, Y. (1967). Social organization of hanuman langurs. In Allmann, S. (ed.),Social Communication among Primates, Chicago University Press, Chicago, pp. 221–236.
Sugiyama, Y., Yoshiba, K., and Parthasarathy, M. D. (1965). Home range, mating season, male group and intertroop relations in hanuman langurs(Presbylis enlellus).Primates 6: 73–106.
Vogel, C, and Loch, H. (1984). Reproductive parameters, adult male replacements and infanticide among free ranging langurs(Presbytis entellus) at Jodhpur (Rajasthan) India. In Hausfater, G., and Hrdy, S. B. (eds.),Infanticide: Comparative and Evolutionary Perspectives, Aldine Press, New York, pp. 237–255.
Winkler, P. (1988). Troop history, female reproductive strategies and timing of male change in Hanuman langurs,Presbytis entellus.Hum. Evol. 3(4): 227–237.
Winkler, P., Loch, H., and Vogel, C. (1984). Life history of Hanuman langures(Presbytis entellus): Reproductive parameters, infant mortality and troop development.Folia PnmatoL 43: 1–23.
Wrangham, R. W. (1981). Drinking competition in vervet monkeys.Anim. Behav. 29: 904–910.
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Agoramoorthy, G. Adult male replacement and social change in two troops of hanuman langurs (Presbytis entellus) at Jodhpur, India. Int J Primatol 15, 225–238 (1994). https://doi.org/10.1007/BF02735275
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DOI: https://doi.org/10.1007/BF02735275