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Comparison of the swimming ability and upstream-migration behavior between chum salmon and masu salmon

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Title: Comparison of the swimming ability and upstream-migration behavior between chum salmon and masu salmon
Authors: Miyoshi, Koji Browse this author
Hayashida, Kazufumi Browse this author
Sakashita, Taku Browse this author
Fujii, Makoto Browse this author
Nii, Hisaya Browse this author
Nakao, Katsuya Browse this author
Ueda, Hiroshi Browse this author →KAKEN DB
Keywords: swimming ability
upstream-migration behavior
standard metabolic rate
critical swimming speed
fish passage
chum salmon
masu salmon
Issue Date: Feb-2014
Publisher: Canadian science publishing, nrc research press
Journal Title: Canadian journal of fisheries and aquatic sciences
Journal Title(alt): Journal canadien des sciences halieutiques et aquatiques
Volume: 71
Issue: 2
Start Page: 217
End Page: 225
Publisher DOI: 10.1139/cjfas-2013-0480
Abstract: The spawning ground of chum salmon (Oncorhynchus keta) is usually located farther downriver than that of masu salmon (Oncorhynchus masou) in Hokkaido, Japan. To compare the swimming abilities of these two species, the relationship between swimming speed and oxygen consumption was compared using a swim tunnel in the laboratory. Then, the upstream-migration behaviors of chum salmon and masu salmon were compared using electromyogram telemetry at fish passages in the Toyohira River, Hokkaido. In the laboratory study, the standard metabolic rate of masu salmon was lower and the critical swimming speed (U-crit) was faster than those of chum salmon. In the field study, the holding time needed to recover the swimming performance exceeding U-crit at the fish passages and the trial number needed to pass the fish passages were significantly lower for masu salmon than chum salmon. These results revealed that masu salmon are more adaptable to extended swimming in high water velocity conditions than chum salmon and that masu salmon are better equipped for a long distance upstream migration to their spawning ground than chum salmon.
Type: article (author version)
Appears in Collections:北方生物圏フィールド科学センター (Field Science Center for Northern Biosphere) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 上田 宏

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