Use of electricity to sedate Lake Trout for intracoelomic implantation of electronic transmitters

North American Journal of Fisheries Management
By: , and 

Links

Abstract

Use of telemetry data to inform fisheries conservation and management is becoming increasingly common; as such, fish typically must be sedated before surgical implantation of transmitters into the coelom. Given that no widely available, immediate-release chemical sedative currently exists in North America, we investigated the feasibility of using electricity to sedate Lake Trout Salvelinus namaycush long enough for an experienced surgeon to implant an electronic transmitter (i.e., 180 s). Specifically, our study objectives were to determine (1) whether some combination of electrical waveform characteristics (i.e., duty cycle, frequency, voltage, and pulse type) could sedate Lake Trout for at least 180 s; and (2) whether Lake Trout that were sequentially exposed to continuous DC and pulsed DC had greater rates of spinal injury and short-term mortality than control fish. A Portable Electrosedation System unit was used to sedate hatchery and wild Lake Trout. Dual-frequency pulsed-DC and two-stage approaches successfully sedated Lake Trout and had similar induction and recovery times. Lake Trout sedated using the two-stage approach did not have survival rates or spinal abnormalities that were significantly different from those of control fish. We concluded that electricity was a viable alternative to chemical sedatives for sedating Lake Trout before surgical implantation of an electronic transmitter, but we suggest that Lake Trout and other closely related species (e.g., Arctic Char Salvelinus alpinus) may require morphotype-specific electrical waveforms due to their morphological diversity.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Use of electricity to sedate Lake Trout for intracoelomic implantation of electronic transmitters
Series title North American Journal of Fisheries Management
DOI 10.1080/02755947.2017.1324544
Volume 37
Issue 4
Year Published 2017
Language English
Publisher Taylor and Francis
Contributing office(s) Great Lakes Science Center
Description 10 p.
First page 768
Last page 777
Google Analytic Metrics Metrics page
Additional metadata about this publication, not found in other parts of the page is in this table