Abstract
The effects of supplemental feeding by tourists on wild Japanese monkey's home range size and location, and troop size and composition were studied for two monkey troops, Troop A and Troop B, living along the Irohazaka loop road, Nikko National Park, central Japan. Changes were documented based on data gathered from 1982 to 1996 by the use of radio telemetry. Troop A's home range size shrank and changed from separate winter and summer ranges to a single, year-round home range, with its core located in a high elevation area where supplemental feeding by tourists was heavy. Troop B's home range also shrank and shifted to a lower elevation where supplemental feeding by tourists was heavy. Troop A's population size increased between the winters of 1983–1984 and 1990–1991 in conjunction with an increase in human encounter rates, and then decreased. Troop B's size increased until the winter of 1993–1994, and then decreased. The instability of troop size between 1993 and 1996 may be explained by documented factors such as a decrease in the adult sex ratio, an increase in the infant-female ratio, and an increase in juvenile mortality and/or emigration, all of which may have been influenced by supplemental feeding by tourists.
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References
Ackerman, B. B.;Leben, F. A.;Samuel, M. D.;Garton E. O. 1990. User's manual for program home range (2nd ed.). Technical Report 15, Forestry, Wildlife and Range Experiment Station, Univ. Idaho, Moscow Idaho, USA.
Dixon, K. R.;Chapman, J. A. 1980. Harmonic mean measure of animal activity areas.Ecology, 61: 1040–1044.
Kie, J. G.; Baldwin, J. M.; Evans, C. J. 1994. “CALHOME (Home Range Analysis Program),” U. S. Forest service pacific southwest research station and California department of fish and game.
Koganezawa, M. 1987. Portable single gate net trap for Japanese monkeys.Primate Res., 3: 29–32. (in Japanese)
Koganezawa, M. 1991. Home range and habitat use of Japanese monkeys in Nikko, Japan. In:Wildlife Conservation,Maruyama,N.;Bobek,B.;Ono,Y.;Regelin,W.;Bartos,L.;Ratcliffe,P. R. (eds.), Japan Wildlife Res. Center, Tokyo, pp. 220–223.
Koganezawa, M. 1997. A study of the population dynamics and movement patterns of Japanese monkeys in Nikko, Japan.Bull. Utsunomiya Univ. Forests, 33: 1–53. (in Japanese with English summary)
Lack, D. 1954.The Natural Regulation of Animal Numbers. Clarendon Press, Oxford.
Leopold, A. 1933.Game Management. Charles Scribner's Sons, New York.
Nigi, K. 1982.Nihonzaru: Sei no Seiri (Japanese monkey: Physiology of Sex). Doubutsu-sha, Tokyo. (in Japanese)
Sugiyama, Y.;Ohsawa, H. 1982. Population dynamics of Japanese monkeys with special reference to the effect of artificial feeding.Folia Primatol, 39: 238–263.
Wada, K. 1994.Saru wa Donoyouni Huyu wo Kosuka: Yasei Nihonzaru no Seitai to Hogo (How Do Japanese Monkeys Spend the Winter: The Ecology and Conservation of Wild Japanese Monkeys). Nobunkyo-kyoukai, Tokyo (in Japanese)
Watanabe, K.;Mori, A.;Kawai, M. 1992. Characteristic features of the reproduction of Koshima monkeys,Macaca fuscata fuscata: a summary of thirty-four years of observation.Primates, 33: 1–32.
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Koganezawa, M., Imaki, H. The effects of food sources on Japanese monkey home range size and location, and population dynamics. Primates 40, 177–185 (1999). https://doi.org/10.1007/BF02557709
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DOI: https://doi.org/10.1007/BF02557709