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Behavioural interactions between sika deer and Japanese serows: are larger and gregarious ungulates dominant?

In: Behaviour
Authors:
H. Takada Wildlife Management Center, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-Cho, Fuchu, Tokyo 183-8509, Japan
Mount Fuji Research Institute, Yamanashi Prefecture Government, 5597-1 Kenmarubi, Kamiyoshida, Fijiyoshida, Yamanashi 403-0005, Japan
Laboratory of Wildlife Ecology and Conservation, School of Veterinary Medicine, Azabu University, 1-17-71 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa 252-5201, Japan

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R. Yano Laboratory of Wildlife Ecology and Conservation, School of Veterinary Medicine, Azabu University, 1-17-71 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa 252-5201, Japan
Mount Asama Japanese Serow Research Group, 2-40 Saiwai-Cho, Fuchu, Tokyo 183-0054, Japan

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H. Watanabe Laboratory of Wildlife Ecology and Conservation, School of Veterinary Medicine, Azabu University, 1-17-71 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa 252-5201, Japan
Mount Asama Japanese Serow Research Group, 2-40 Saiwai-Cho, Fuchu, Tokyo 183-0054, Japan

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R. Ohuchi Laboratory of Wildlife Ecology and Conservation, School of Veterinary Medicine, Azabu University, 1-17-71 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa 252-5201, Japan
Mount Asama Japanese Serow Research Group, 2-40 Saiwai-Cho, Fuchu, Tokyo 183-0054, Japan

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T. Kanno Laboratory of Wildlife Ecology and Conservation, School of Veterinary Medicine, Azabu University, 1-17-71 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa 252-5201, Japan
Mount Asama Japanese Serow Research Group, 2-40 Saiwai-Cho, Fuchu, Tokyo 183-0054, Japan

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A. Washida Mount Fuji Research Institute, Yamanashi Prefecture Government, 5597-1 Kenmarubi, Kamiyoshida, Fijiyoshida, Yamanashi 403-0005, Japan
Laboratory of Wildlife Ecology and Conservation, School of Veterinary Medicine, Azabu University, 1-17-71 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa 252-5201, Japan
Mount Asama Japanese Serow Research Group, 2-40 Saiwai-Cho, Fuchu, Tokyo 183-0054, Japan

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K. Nakamura Mount Fuji Research Institute, Yamanashi Prefecture Government, 5597-1 Kenmarubi, Kamiyoshida, Fijiyoshida, Yamanashi 403-0005, Japan

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N. Tezuka Mount Asama Japanese Serow Research Group, 2-40 Saiwai-Cho, Fuchu, Tokyo 183-0054, Japan
Department of Forest Science, Faculty of Regional Environmental Science, Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya 156-8502, Japan

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D. Shimodoumae Mount Asama Japanese Serow Research Group, 2-40 Saiwai-Cho, Fuchu, Tokyo 183-0054, Japan
Department of Forest Science, Faculty of Regional Environmental Science, Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya 156-8502, Japan

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M. Minami Laboratory of Wildlife Ecology and Conservation, School of Veterinary Medicine, Azabu University, 1-17-71 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa 252-5201, Japan

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Abstract

In ungulate assemblages, although interspecific differences in body size and gregariousness are thought to have a direct impact on winning or losing in interference competition, this has not been fully investigated. We observed a total of 64 instances of interspecific contact between larger-gregarious sika deer and smaller-solitary Japanese serows over eight years field observations. Deer-to-serow aggression were never observed. Whereas, serows showed antagonistic behaviour, such as walk push and chasing, to deer, but could rarely displace deer. Serows showed higher alertness to deer than deer did to serows. These results suggest that larger-gregarious ungulates do not necessarily exclude smaller-solitary ones and serows are sensitive to the presence of deer. Differences in aggressiveness and alertness between deer and serows may reflect differences in territoriality: serows may be more sensitive to the invasion of deer into their territory. Serows’ sensitivity to deer may have a negative effect on their population.

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