Skip to Main Content
Movement and capture efficiency of radio-tagged salmonids sampled by electrofishingAuthor(s): Michael K. Young; David A. Schmetterling
Source: North American Journal of Fisheries Management. 32: 823-831.
Publication Series: Scientific Journal (JRNL)
Station: Rocky Mountain Research Station
View PDF (123.04 KB)
DescriptionElectrofishing-based estimates of fish abundance are common. Most population models assume that samples are drawn froma closed population, but population closure is sometimes difficult to achieve. Consequently, we individually electrofished 103 radio-tagged trout of two species, westslope cutthroat trout Oncorhynchus clarkii lewisi and brook trout Salvelinus fontinalis, in five streams in western Montana to quantify the influence of habitat and fish size on capture efficiency and movement related to electrofishing with unpulsed DC. First-pass capture efficiency was 46% and declined on subsequent passes. No variables were related to capture efficiency, and only the percentage of cobble or larger substrate was related to the probability that uncaptured fish would move during the first electrofishing pass. About 20% of the uncaptured fish did not move, and 95% traveled less than 18 m.We concluded that for these streams, the bias in abundance estimates from disregarding movement would be relatively minor.
- You may send email to email@example.com to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationYoung, Michael K.; Schmetterling, David A. 2012. Movement and capture efficiency of radio-tagged salmonids sampled by electrofishing. North American Journal of Fisheries Management. 32: 823-831.
Keywordselectrofishing, radio-tag, salmonids, westslope cutthroat trout, Oncorhynchus clarkii lewisi, brook trout, Salvelinus fontinalis
- Alien invasions in aquatic ecosystems: toward an understanding of brook trout invasions and potential impacts on inland cutthroat trout in western North America
- Role of climate and invasive species in structuring trout distributions in the interior Columbia River Basin, USA
- Competition and predation as mechanisms for displacement of greenback cutthroat trout by brook trout
XML: View XML