Variation in intergroup encounters among two provisioned free-ranging populations of Japanese macaques Macaca fuscata  

作　　者：Peng ZHANG Kunio WATANABE 

机构地区：[1]Anthropology Department,Sun Yat-sen University,Guangzhou,510275,China [2]Primate Research Institute,Kyoto University,Japan

出　　处：《Current Zoology》2012年第4期517-524,共8页动物学报（英文版）

基　　金：The study was supported by the Na- tional Natural Science Foundation of China （31000175）, the Grant-In-Aid from the Japan Society for the Promotion of Science （JSPS： P09103） and the Kiriyama Foundation of Ja-pan. We are grateful to the Choshikei Monkey Park and Jigo-kudani Monkey Park for granting permission to carry out this research, special thanks to Mr. Eishi Tokida for his kind aids in our study. We thank Dr. Andrew J. Macintosh for reading and commenting on a previous draft of this manuscript. We thank all members of the Anthropology Department, Sun Yat-sen University, China and the Social Ecology Department at the Primate Research Institute, Kyoto University, for their helpful comments on this research. The research and care of the monkeys under study abides by the national and institu- tional guidelines for the care and management of primates established by the Primate Research Institute, Kyoto Univer- sity, Japan.

摘　　要：Typically, Japanese macaques are thought to avoid encountering other groups wherever possible. Intergroup relations between macaques on Shodoshima Island, however, appear exceptional. We show that neighboring groups of Shodoshima mon-keys spent 32.8% of their active time in proximity to （〈100 m） and even foraged simultaneously at the same provisioning site with another group. The average duration and rate of intergroup encounters at Shodoshima （59.8 rain, 0.33 times/hour, n=269） were approximately ten times longer and 16.5 times more frequent than those at Jigokudani （6.1 rain, 0.02 times/hour, n--14）. Since both populations have similar provisioning and ecological conditions, such variation cannot be explained by the socioecol- ogy model alone. Compared with other populations of Japanese macaques, intergroup relations of Shodoshima monkeys are also characterized by more frequent neutral encounters, less frequent agonistic encounters, more frequent unsuccessful displacement, a lower intensity of aggression, and more frequent counter-aggression between groups. These characteristics suggest that intergroup relationships on Shodoshima Island are more tolerant than those in other Japanese macaque populations. This study reveals con- siderable differences in intergroup encounters within local populations of Japanese macaques living in similar environments, and emphasizes the role of social factors in such intra-specific variation [Current Zoology 58 （4）： 517-524, 2012].

关 键 词：Intergroup encounter Macacafuscata Intra-specific variation TOLERANCE 

分 类 号：S826[农业科学—畜牧学] Q959.848[农业科学—畜牧兽医]