caa a22 4500 475768655 CHVBK 20180406123613.0 cr unu---uuuuu 170329e20000601xx s 000 0 eng 10.1023/A:1005448120967 doi (NATIONALLICENCE)springer-10.1023/A:1005448120967 Variation in Intergroup Encounters in Two Populations of Japanese Macaques [Elektronische Daten] [Hideki Sugiura, Chiemi Saito, Sizue Sato, Naoki Agetsuma, Hiroyuki Takahashi, Toshiaki Tanaka, Takeshi Furuichi, Yukio Takahata] The nature of intergroup encounters differed between two populations of wild Japanese macaques (Macaca fuscata): the Yakushima and Kinkazan populations. In the Yakushima population, intergroup encounters were more likely to result in the displacement of one group, intergroup agonistic interaction was common, and intergroup dominance was usually distinct. When displacement occurred at Yakushima, larger groups tended to dominate smaller ones. Conversely, in the Kinkazan population, intergroup encounters rarely resulted in displacement, intergroup agonistic interaction was rare, and intergroup dominance was usually unclear. Thus, monkeys in Yakushima appear to defend resources actively during encounters, while those in Kinkazan usually did not defend resources. The frequency of encounters was significantly higher in Yakushima than in Kinkazan. The two populations had very different group densities and traveling speeds, both of which directly influence the chance of encounters. Taking these differences into account, we compared the observed frequency with those predicted by the ideal gas model. The observed frequencies in both populations were about one-third of the number expected with the model, which suggests that the differences in encounter frequency were caused by differences in group density and traveling speed. We discuss this intraspecific variation in light of economic defendability in connection to habitat differences and the evolutionary significance of resource defense behavior. Plenum Publishing Corporation, 2000 intergroup encounter nationallicence territoriality nationallicence resource defense nationallicence ideal gas model nationallicence Macaca fuscata nationallicence Sugiura Hideki Primate Research Institute, Kyoto University, 484-8506, Inuyama, Japan aut Saito Chiemi Environmental Education Center, Miyagi University of Education, 980-0845, Sendai, Japan aut Sato Sizue Miyagi Monkey Research Group, Sendai, Miyagi, Japan aut Agetsuma Naoki Department of Economics, Akita University of Economics and Law, 010-0058, Akita, Japan aut Takahashi Hiroyuki Primate Research Institute, Kyoto University, 484-8506, Inuyama, Japan aut Tanaka Toshiaki Department of Cognitive and Behavioral Science, Graduate School of Arts and Sciences, The University of Tokyo, 153-8902, Meguro, Japan aut Furuichi Takeshi Laboratory of Biology, Meiji Gakuin University, 244, Yokohama, Japan aut Takahata Yukio School of Policy Studies, Kwansei-Gakuin University, 669-1337, Sanda, Japan aut International Journal of Primatology Kluwer Academic Publishers-Plenum Publishers 21/3(2000-06-01), 519-535 0164-0291 21:3<519 2000 21 10764 https://doi.org/10.1023/A:1005448120967 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1005448120967 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sugiura Hideki Primate Research Institute, Kyoto University, 484-8506, Inuyama, Japan aut NATIONALLICENCE 700 1- Saito Chiemi Environmental Education Center, Miyagi University of Education, 980-0845, Sendai, Japan aut NATIONALLICENCE 700 1- Sato Sizue Miyagi Monkey Research Group, Sendai, Miyagi, Japan aut NATIONALLICENCE 700 1- Agetsuma Naoki Department of Economics, Akita University of Economics and Law, 010-0058, Akita, Japan aut NATIONALLICENCE 700 1- Takahashi Hiroyuki Primate Research Institute, Kyoto University, 484-8506, Inuyama, Japan aut NATIONALLICENCE 700 1- Tanaka Toshiaki Department of Cognitive and Behavioral Science, Graduate School of Arts and Sciences, The University of Tokyo, 153-8902, Meguro, Japan aut NATIONALLICENCE 700 1- Furuichi Takeshi Laboratory of Biology, Meiji Gakuin University, 244, Yokohama, Japan aut NATIONALLICENCE 700 1- Takahata Yukio School of Policy Studies, Kwansei-Gakuin University, 669-1337, Sanda, Japan aut NATIONALLICENCE 773 0- International Journal of Primatology Kluwer Academic Publishers-Plenum Publishers 21/3(2000-06-01), 519-535 0164-0291 21:3<519 2000 21 10764 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer