Study on African Primates in the Forest and the Openland

对非洲某局部森林和开阔地进行了实地研究，阐明了狐猴在森林和开阔地的适应特征和分散过程。继去年之后，今年在加蓬的Ipassa-Mingouri自然保护区对森林进行了研究。Hamada陪同研究合作者Okayasu（英国Howletts研究所）。在疣猴和尾猴的声音交流研究中，他们收集了猴子对自己群体和邻近群体中个体的声音的声音反应。然后，他们分析了声乐剧目和收集到的声乐数据的功能。他们还收集了猴子在前一年的觅食行为和食物种类的数据。（主要由冈康主持）。Hamada收集了疣猴和尾猴运动、咀嚼和发声的形态学数据。Ohsawa, Agetsuma, Njifoti（本研究项目的外国研究者）和Chatani（研究合作者：JSPS博士后研究员）在喀麦隆Kala Maloue国家公园的稀树草原上进行了研究。进行了以下调查。1. 收集了雨季斑猴的觅食活动、奶类节律和食物种类数据（Agetsuma）。2. 通过观察和录像，收集了斑猴陆地运动模式的数据。每年0.5 ~ 4.5日全天采集2个个体（Chatani）。3. 采用直接观察的方法，研究了单雄群后宫雄被单雄取代的过程。在这一年里，温顺的雄性被观察到比雄性平均更频繁地交配。

Field researches both in a topical forest and an open land in Africa was conducted to clarify the feature of adaptation and process of dispersion of cercopiethecid monkeys in forests and into open lands.Research in a forest was conducted at the Nature Reserve of Ipassa-Mingouri in Gabon this year following the previous year. Hamada accompanied a research collaborator Okayasu (Howletts Institute, United Kingdom). In the vocal communication studies of colobus monkeys and cercopiethecid monkeys they collected vocal response of monkeys to vocal sounds of individuals in their own group and those in the neighbouring groups. Then they analyzed the vocal repertory and the function of the collected data of vocal sound. They also collected the data on foraging behaviours and food items of monkeys following the previous year. (conducted mainly by Okayasu). Hamada collected the morphological data on locomotion mastication and vocalization of colobus and cercopiethecid monkeys.Research in a savanna was conducted at Kala Maloue National Park in Cameroon by Ohsawa, Agetsuma, Njifoti (Foreign investigator of this research project) and Chatani (research collaborator: JSPS post-doctoral researcher). Following surveys were conducted. 1. Data on foraging activity dairy rhythm and food items of patas monkeys in the rain season were collected (Agetsuma). 2. Data on terrestrial locomotion patterns of patas monkeys were collected through observation and in videotapes. Date on whole day long of 2 individuals of each year from 0.5 to 4.5 were collected (Chatani). 3. The process of supplanting of the harem male of one-male group by a solitary male was investigated through direct observation. In this year submissive males were observed to copulated more frequently than the males in average.