The migration of fin whales into the southern Chukchi Sea as monitored with passive acoustics

Koki Tsujii1*, Mayuko Otsuki1, Tomonari Akamatsu2,3, Ikuo Matsuo3,4, Kazuo Amakasu5, Minoru Kitamura6, Takashi Kikuchi6, Kazushi Miyashita7, and Yoko Mitani7 Graduate School of Environmental Science, Hokkaido University, 20-5 Benten-cho Hakodate, Hokkaido 040-0051, Japan National Research Institute of Fisheries Science, Fisheries Research Agency, 2-12-4 Fukuura, Kanazawa, Yokohama, Kanagawa 236-8648, Japan CREST JST, 5-3 Yobancho, Chiyoda-ku, Tokyo 102-8666, Japan Tohoku Gakuin University, 2-2-1 Tenjinzawa, Izumi-ku, Sendai, Miyagi 981-3193, Japan Tokyo University of Marine Science and Technology, 4-5-7, Konan, Minato-ku, Tokyo 108-8477, Japan Japan Agency for Marine-Earth Science and Technology, 2-15 Natsushima-cho, Yokosuka, Kanagawa 237-0061, Japan Field Science Center for Northern Biosphere, Hokkaido University, 20-5 Benten-cho Hakodate, Hokkaido 040-0051, Japan *Corresponding author: tel/fax: +81 138 85 6625; e-mail: kou1114t@gmail.com