Migratory timing of masu salmon and Dolly Varden smolts exiting the Uebetsu River near the Shiretoko World Heritage Site, Hokkaido, Japan, and potential angling effects

Numbers of masu salmon and Dolly Varden in streams in the Shiretoko Peninsula, location of the Shiretoko World Heritage Site in north eastern Hokkaido, appear to be declining. One concern is whether masu salmon smolts continue to migrate during July, after the existing May to June angling closure es...

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Bibliographic Details
Published in:Ichthyological research 2016-01, Vol.63 (1), p.181-186
Main Authors: Kasugai, Kiyoshi, Nagata, Mitsuhiro, Takeuchi, Katsumi, Torao, Mitsuru, Murakami, Yutaka, Sasaki, Yoshitaka, Miyakoshi, Yasuyuki, Irvine, James R
Format: Article
Language:English
Subjects:
Animal migration
Animal Systematics/Taxonomy/Biogeography
Biomedical and Life Sciences
Ecology
Fishing
Freshwater
Freshwater & Marine Ecology
Life Sciences
Marine conservation
migratory behavior
Rivers
Salmon
Salmonidae
Short Report
smolts
sport fishing
streams
water temperature
World Heritage Areas
Zoology
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Summary:Numbers of masu salmon and Dolly Varden in streams in the Shiretoko Peninsula, location of the Shiretoko World Heritage Site in north eastern Hokkaido, appear to be declining. One concern is whether masu salmon smolts continue to migrate during July, after the existing May to June angling closure established to protect migrating smolts in eastern Hokkaido. Smolt timing and relative abundances were monitored in the Uebetsu River near the World Heritage Site from May to July during 2005–2007. Each year some masu salmon smolts emigrated during July, especially in 2005 when 82% of smolts captured were caught that month. In contrast, most anadromous Dolly Varden smolts emigrated prior to early June when stream temperatures
ISSN:1341-8998
1616-3915
DOI:10.1007/s10228-015-0477-4