| Co-Investigator(Kenkyū-buntansha) |
テボング E カメルーン国立動物学研究所, 所長
MITANI Masazumi FELLOWSHIPS OF THE JAPAN SOCIETY FOR THE PROMOTION OF SCIENCE FOR JAPANESE JUNIO, 霊長類研究所, 日本学術振興会特別研 (20202343)
OSAWA Hideyuki ASSISTANT PROFESSOR, PRIMATE RESEARCH INSTITUTE, KYOTO UNIVERSITY, 霊長類研究所, 助教授 (60027498)
TEBONG E. DIRECTOR, ZOOLOGICAL RESEARCH INSTITUTE, CAMEROON
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| Budget Amount *help |
¥17,200,000 (Direct Cost: ¥17,200,000)
Fiscal Year 1989: ¥5,100,000 (Direct Cost: ¥5,100,000)
Fiscal Year 1988: ¥12,100,000 (Direct Cost: ¥12,100,000)
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| Research Abstract |
In 1988, studies in wet areas were carried out on the relationship between forest structure and primate species composition in Congo, Cameroon, and Equatrial Guinea, and the studies in dry area were carried out on socio-ecology of patas monkeys in the Kala Maloue National Park in Cameroon. Following these studies, data analysis was in the process and one of the research members collected comparative data in Congo in 1989.
Three types of forest structure-tropical semi-deciduous forest, tropical evergreen forest, and tropical mountain forest-could be categorized in the wet areas. Primate species and density were most abundant in the tropical semi-deciduous forest found from south-eastern Cameroon to northern Congo. Especially, the Bomasa forest in northern Congo was the richest in the primate aboundances.
Patas monkeys and savanna monkeys are found together in the study area, the Kala Maloue National Park. Although their systematic relation is very close, the mating season is defferent to each other. This study aims to clarify the ultimate factors of this difference through the analysis of their behavior. The results show that feeding behaviors of patas monkeys adapt to the mosaic and unstable food environment, while those of savanna monkeys adapt to the stable foodenvironment such as the riverine forest. These difference affects the mating seasons between these twe species.
The data of the social interactions among female patas monkeys, which were collected in 1988 in the Kala Maloue National Park in Cameroon, were analysed, in terms of the reproductive condition of females and the size of their groups. The distribution of social interactions among females in the birth season was different from that in non-birth season, and it seems that the appearance of new-born babies led to the change of the distribution.
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