Patterns of predation in a free-ranging troop of stumptail macaques (Macaca arctoides): Relations to the ecology II
- 34 Downloads
Data on patterns of systematic and ocassional hunting of birds, mammals, reptiles, mollusks and insects by Stumptail macaques are reported for a period of ten months. Systematic hunting of water snails, terrestrial spiders, and land worms was conducted by all age classes, except infants, and both sexes. Of the occasional hunting of birds, large lizards, large frogs, and field mice, the adult females conducted 70%, the adult males 12%, the two year old females 12%, and the two year old males 6%. The differences between males and females were statistically significant (.05 confidence level). Females dominated the hunt and were more interested in meateating than the males. This contrasts strikingly with the data reported for baboons and chimpanzees in which the males dominate the hunt.
Of all the prey hunted ocassionally, 76% was shared. The differences between shared and not sared prey were statistically significant (.05 confidence level). All age classes, including infants, participated in meat-sharing. Three types of meat-sharing are described: mother-offspring, hunter-close-friend, and piece-dropping. The prey was shared with genetic relatives, and with close and sistant friends in this order. Pearson’s correlation coeficients between rank of hunter and number of hunts and between rank of hunter and number of individuals with whom the prey was shared yielded +.866 and +.890 respectively. Meat-sharing seems to be similar to that observed for baboons but some differences exist between baboons and chimpanzees on the one hand and Stumptails on the other. Dominance relations in our Stumptails seem to act as the context determining the direction and the type of sharing.
An increase in hunting activity during the study period is suggested to be the result of the prey’s migratory and breeding patterns, of environmental changes, and of the high activity scores and physiological states of the adult-females in the troop. Although not hunted, reactions to snakes, iguanas, scorpions, and gulls are also described.
KeywordsConfidence Level Hunt Adult Female Activity Score Dominance Relation
Unable to display preview. Download preview PDF.
- Estrada, A., 1977. A ten month field study of the ontogeny of social relations in a free-ranging troop of stumptail macaque (Macaca arctoides). Ph. D. Thesis, Rutgers University.Google Scholar
- ———— &R. Estrada, 1976. Establishment of a free-ranging colony of stumptail macaques (Macaca arctoides): Relation to the ecology, I.Primates, 17: 337–355.Google Scholar
- Van Lawick Goodall, J., 1968. The Behaviour of free-living chimpanzees in the Gombe Stream Reserve.Anim. Behav. Monogr., 1: 161–311.Google Scholar
- Hamilton, W. D., 1964. The genetical evolution of social behaviour, I.J. Theoret. Biol., 7: 1–16.Google Scholar
- Strum, S., 1975. Primate predation: Interim report on the development of a tradition in a troop of olive baboons.Science, 187: 755–757.Google Scholar
- Teleki, G., 1973.The Predatory Behaviour of Wild Chimpanzees. Bucknell University Press, Lewisburg, Pa.Google Scholar
- Trivers, R. L., 1971. The evolution of reciprocal altruism.Quart. Rev. Biol., 45: 35–57.Google Scholar
- Welkowitz, J., R. B. Ewen, &J. Cohen, 1971.Introductory Statistics for the Behavioral Sciences. Academic Press, N. Y.Google Scholar