Abstract
Pig-tailed langurs (Simias concolor) were observed in the Pagai Islands and in Siberut. They lived in 1-male groups containing from one to five or more females plus their young. Adult males produced loud vocalizations of the sortGautier andGautier (1977) called “type 1 loud calls.” The pig-tailed langur's type 1 loud call (TOLC) was a series of 2 to 25 nasal barks, the loudest of which could be heard for 500 m or more in the rain forest. Exchange of TOLC's between males was the only frequent intergroup interaction. Fifty-one percent of TOLC's were emitted spontaneously, 33% occurred in response to TOLC's of other males, 13% to falling trees, 4% in response to thunder, and 1% during a fight between males of different groups. Although TOLC's occurred throughout the day, they exhibited a bimodal distribution, with a peak of calling early in the morning, and another in late afternoon. Tape-recorded TOLC's played back in the field stimulated males hearing them to emit TOLC's of their own. Barks in experimentally-elicited TOLC's were delivered at a faster rate than barks in other TOLC's were. While TOLC's mediate intergroup communication among males, field playback experiments are needed to truly elucidate their functions.
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References
Armstrong, E. A., 1963.A Study of Bird Song. Oxford Univ. Press, London.
Brook, R. &J. B. Falls, 1975. Individual recognition by song in white-throated sparrows. I. Discrimination of songs of neighbors and strangers.Can. J. Zool., 53: 879–888.
Curtin, S. H., 1980. Dusky and banded leaf monkeys. In:Malayan Forest Primates,D. J. Chivers (ed.), Plenum New York, pp. 107–145.
Gautier, J.-P. &A. Gautier, 1977. Communication in Old World monkeys. In:How Animals Communicate,T. A. Sebeok (ed.), Indiana Univ. Press, Bloomington, pp. 890–964.
MacKinnon, J., 1974. The behaviour and ecology of wild orang-utans (Pongo pygmaeus).Anim. Behav., 22: 3–74.
Marler, P., 1968. Aggregation and dispersal: Two functions in primate communication. In:Primates: Studies in Adaptation and Variability,P. C. Jay (ed.), Holt, Rinehart, & Winston, New York, pp. 420–438.
————, 1972. Vocalizations of East African monkeys. II. Black and white colobus.Behaviour, 42: 175–197.
Miller, G. S., Jr., 1903. Seventy new Malayan mammals.Smith. Misc. Coll., 45: 1–73.
Mitani, J. C., 1985a. Sexual selection and adult male orangutan long calls.Anim. Behav., 33: 272–283.
————, 1985b. Gibbon song duets and intergroup spacing.Behaviour, 92: 59–96.
Seyfarth, R. M., 1987. Vocal communication and its relation to language. In:Primate Societies,B. B. Smuts,D. L. Cheney,R. M. Seyfarth,R. W. Wrangham, &T. T. Struhsaker (eds.), Univ. of Chicago Press, Chicago, pp. 440–461.
Siegel, S., 1956.Nonparametric Statistics for the Behavioral Sciences.McGraw-Hill, New York.
Tenaza, R. R., 1975. Territory and monogamy among Kloss' gibbons (Hylobates klossii) in Siberut Island, Indonesia.Folia Primatol., 24: 68–80.
————, 1987. The status of primates and their habitats in the Pagai Islands, Indonesia.Prim. Conserv., 8: 104–110.
————, 1988. Female sexual swellings in the Asian colobineSimias concolor.Amer. J. Primatol., 17: 81–86.
----, in prep. a. Observations on behavior and ecology of the pig-tailed langur (Simias concolor).
----, in prep. b. Sexual dimorphism and mating system in the pig-tailed langur (Simias concolor).
———— &R. L. Tilson, 1976. Monogamy and duetting in an Old World monkey.Nature, 263: 320–321.
Tilson, R. L., 1977. Social organization of simakobu monkeys (Nasalis concolor).J. Mammal., 58: 202–212.
Watanabe, K., 1981. Variations in group composition and population density of the sympatric Mentawaian leaf-monkeys.Primates, 22: 145–160.
Welty J. C. &L. Baptista, 1988.The Life of Birds. Saunders, New York.
World Wildlife Fund, 1980.Saving Siberut: A Conservation Master Plan. World Wildlife Fund, Bogor, Indonesia.
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Tenaza, R.R. Intergroup calls of male pig-tailed langurs (Simias concolor). Primates 30, 199–206 (1989). https://doi.org/10.1007/BF02381304
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DOI: https://doi.org/10.1007/BF02381304