Factors influencing successful eradication of nonnative brook trout from four small Rocky Mountain streams using electrofishing

North American Journal of Fisheries Management
By: , and 

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Abstract

We successfully eradicated nonnative Brook Trout Salvelinus fontinalis by electrofishing from 2.4- to 3.0-km treatment reaches of four Rocky Mountain streams in Montana to conserve sympatric populations of native Westslope Cutthroat Trout Oncorhynchus clarkii lewisi. At least 6, and as many as 14, removal treatments of two to four electrofishing passes per treatment were required to successfully eradicate Brook Trout from these treatment reaches. We increased success by modifying our treatment efforts during this study from single annual treatments to several treatments a year to take advantage of autumn spawning and winter aggregating behavior. Eradication by electrofishing cost US \$3,500 to \$5,500 per kilometer where no riparian vegetation or woody debris clearing was necessary, increasing to \$8,000 to \$9,000 per kilometer where clearing was needed. Treatment costs without stream clearing were similar to costs of eradication using piscicides. Eradication by electrofishing may be preferable where native fish occur in sympatry with nonnative fish in smaller streams (base flow wetted widths

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Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Factors influencing successful eradication of nonnative brook trout from four small Rocky Mountain streams using electrofishing
Series title North American Journal of Fisheries Management
DOI 10.1080/02755947.2014.942042
Volume 34
Issue 5
Year Published 2014
Language English
Publisher American Fisheries Society
Contributing office(s) Coop Res Unit Seattle
Description 10 p.
First page 988
Last page 997
Country United States
State Montana
Other Geospatial Cottonwood Creek, Craver Creek, Muskrat Creek, Spring, Staubach Creek, Whites Creek, Upper Missouri River basin
Online Only (Y/N) N
Additional Online Files (Y/N) N
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