First documentation of detailed behaviors of endangered adult Sakhalin taimen <Emphasis Type="Italic">Parahucho perryi</Emphasis> in the Bekanbeushi River system,eastern Hokkaido,Japan, using bio-logging and acoustic telemetry concurrently |
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| Authors: | Kentaro Honda Nobuyuki Takahashi Keiichi Yamamoto Haruka Kagiwada Yuichi Tsuda Yoko Mitani Kazushi Miyashita |
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| Institution: | 1.Field Science Center for Northern Biosphere,Hokkaido University,Akkeshi,Japan;2.Graduate School of Environmental Science,Hokkaido University,Hokkaido,Japan;3.Field Science Center for Northern Biosphere,Hokkaido University,Hakodate,Japan;4.Hokkaido National Fisheries Research Institute,Japan Fisheries Research and Education Agency,Sapporo,Japan;5.National Research Institute of Far Seas Fisheries,Japan Fisheries Research and Education Agency,Shizuoka,Japan |
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| Abstract: | Behavior of adult Parahucho perryi was examined using bio-logging and acoustic telemetry concurrently in the Bekanbeushi River system, eastern Hokkaido, Japan, in 2009 and 2010. Based on 46.1–87.9 h data from five P. perryi (69.0–80.0 cm fork length) caught from Lake Akkeshi, they used upstream (n = 2), midstream (n = 3), and downstream (n = 4) habitats. Large variability in diel activity and depth occupation existed in each stream habitat; however, fish in the downstream habitat tended to be more active than those in the upper habitats and mainly occupied shallower depths than mean bottom depth in this habitat. |
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