Junichirô Itani

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It has been said that there is no stable and permanent social unit in a society of chimpanzees. From observations at Filabanga in Western Tanzania and some other observed cases, we concluded that a large-sized group consisting of 30–50 animals is a social unit common to chimpanzees, and pointed out that chimpanzees freely repeat grouping and dispersion(More)
This paper reports how the wild Japanese monkeys at Mt. Takasaki-Yama (City of Oita, Kyusyu) adapted themselves, in terms of food habits, to the change of environments, which was caused by the contact with men. This report contains following problems; 1) acquisition of new food habits, namely one of acculturation problems, 2) the difference in the acquiring(More)