open access

https://hdl.handle.net/2115/56647

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

英語

Telemetry

2013-08

Springer

Fish Physiology And Biochemistry

39(4)

907-915

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.

学術雑誌論文

Accepted Manuscript

The final publication is available at link.springer.com

0920-1742

AA10749080