Mahale Mountains Wildlife Research Centre - Population Density

The following table is a listing of various population densities and their sources:

Density (Indiv. per km2)Source
0.35 -.40 (520-600/1500km2)
Mahale - whole park
Kano. T., 1972. Distribution and adaptation of the chimpanzee on the eastern shore of Lake Tanganyika. Kyoto University of African Studies, 7:37-129.
.15-.18 (320-400/2200km2)
Masito Area (incl. Kasakati & Filibanga)
See above
.18-.29 (200-320/1100km2)
Mukuyu Area (incl. Kabogo)
See above
7.6 (106/14km2)
M group home range: 1981-82
Hairaiwa-Hasegawa, M., Hasegawa, T. & Nishida, T. 1984. Demographic study of a large-sized unit-group of chimpanzees in the Mahale Mountains, Tanzania: A Preliminary Report. Primates, 25(4):401-413.
.6-2.5 (9-37/15km2)
K group (1967-83)
See above. Range from Kano, 1972.
.21-.22 (46-47/215km2)
Kasakati (1963-66)
See above. Range from Kano, 1972.
.21 (43/200km2)
Filabanga (1965)
See above. Range from Kano, 1972.
.96 (480/500km2)
Study group & surrounding groups
Nishida, T., Takasaki, H. & Takahata, Y. (1990). Demography and reproductive profiles. In Nishida, T., The Chimpanzees of the Mahale Mountains: Sexual and Life History Strategies (pp.63-97). Tokyo: University of Tokyo Press.
.43 (700/1613km2)
Whole park
See above
2.4-3.2 (60-80/25km2)
2-2.7 (60-80/30km2)
B Group
See above
1.4 (10/7km2)
K Group
See above
4.3 (90/21km2)
M Group
See above
4.8 (29/6km2)
K Group, 1967, based on nomadic range
Nishida, T. (1968). The social group of wild chimpanzees in the Mahali Mountains. Primates, 9:167-224.
2.8 (29/10.4km2)
K Group
Nishida, T. (1979). The social structure of chimpanzees. In Hambug, D.A. & McCown, E.R., The Great Apes (pp.73-121).Menlo Park: Benjamin/Cummins Publishing Co.
5.4 (114/21km2)
K & M Groups
Hasegawa, T. & Hiraiwa-Hasegawa, M. 1983. Opportunistic and restrictive matings among wild chimpanzees in the Mahale Mountains, Tanzania. J. Ethol. 1:75-85.
K&M Groups
Collins, D. A. & McGrew, W. C. (1988). Habitats of three groups of chimpanzees (Pan troglodytes) in western Tanzania compared. J. Hum. Evol. 17: 553-574.
Izawa, K. & Itani, J. (1966). Chimpanzees in Kasakati Basin, Tanganyika. (I) Ecological stuy in the rainy season 1963-1964. Kyoto Univ. African Studies, 1:73-156.
1.5 (70/45km2)
Kabogo Point Area
See above
.50-.75 (100-150/201.3km2)
Suzuki, A. (1969). An ecological study of chimpanzees in a savanna woodland. Primates, 10:103-148.
See above
2.4 (110/45km2)
Ititye-Kasakati area
Izawa, J. (1970). Unit groups of chimpanzees and their nomadism in the savanna woodland. Primates, 11:1-46.
0.2 (30/150km2)
Kano,T. (1971). The chimpanzee of Filibanga, western Tanzania. Primates, 12:229-46.
2.3 (24/10km2, maybe 21km2)
K Group - home range (1969)
Nishida, T. & Kawanaka, K. (1972). Inter-unit-group relationships among wild chimpanzees of the Mahali Mountains. Kyoto Univ. African Studies, 7:131-169.
3.5-4.7 (60-80/17km2, may be 34km2)
M Group
See above
1.1-2.0 (21-34km2)
Baldwin, P. J., McGrew, W. C. & Tutin, C. E. G. (1982). Wide-ranging chimpanzees at Mt. Assirik, Senegal. Int. J. Primatol. 3: 367-385. Based on Nishida & Kawanaka (1972), p. 133.
0.5-0.75 (25-200km2)
Kasakati Basin
See above. Based on Suzuki, (1969), p. 133.
0.3-0.4 (122-1242)
Kasakati Basin
See above. Based on Izawa (1970), pp.34 & 35.
0.2 (150km2)
See above. Based on Kano (1971), p.241.
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