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Effects of anesthesia and surgery on U (crit) performance and MO2 in chum salmon, Oncorhynchus keta

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Title: Effects of anesthesia and surgery on U (crit) performance and MO2 in chum salmon, Oncorhynchus keta
Authors: Hayashida, Kazufumi Browse this author
Nii, Hisaya Browse this author
Tsuji, Takatoshi Browse this author
Miyoshi, Koji Browse this author
Hamamoto, Satoshi Browse this author
Ueda, Hiroshi Browse this author →KAKEN DB
Keywords: Critical swimming speeds (U-crit)
EMG transmitter
Oxygen consumption
Issue Date: Aug-2013
Publisher: Springer
Journal Title: Fish Physiology And Biochemistry
Volume: 39
Issue: 4
Start Page: 907
End Page: 915
Publisher DOI: 10.1007/s10695-012-9750-x
Abstract: Telemetry is a useful technique for elucidating salmon behavior, but the recovery periods before fish can be safely released after the attachment of telemetry devices have not yet been established. Reported recovery times vary widely, from 2 h to 13 days. We examined how anesthesia and surgery to attach external electromyogram (EMG) transmitters affected chum salmon (Oncorhynchus keta) recovery based on three physiological parameters. Fish subjected to anesthesia plus EMG transmitter attachment (EMG group), anesthesia only (AO group), and no handling (control) were placed in a swim tunnel. Critical swimming speed (U (crit)), oxygen consumption (MO2), and muscle activity (EMG values) were assessed 0, 1, 6, 12, 24, and 30 h after treatment. The MO2 in the EMG and AO groups was higher than in the control group 1 h after treatment, but did not differ significantly from the control in all subsequent trials (from 6 to 30 h after treatment). Values for U (crit) and EMG were not significantly different from the control group in any of the trials conducted 1-30 h after treatment. We concluded that chum salmon had regained their normal swimming ability by 6 h after treatment and could be safely released into the natural environment.
Rights: The final publication is available at
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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