Skip to Main Content
Eradication of non-native fish from a small mountain lake: gill netting as a non-toxic alternative to the use of rotenone.Author(s): R.A. Knapp; K.R. Matthews
Source: Restoration Ecology 6:207-213.
Publication Series: Miscellaneous Publication
PDF: View PDF (0 B)
DescriptionNearly all mountain lakes in the western United States were historically fishless, but most now contain introduced trout populations. As a result of the impacts of these introductions on ecosystem structure and function, there is increasing interest in restoring some lakes to a fishless condition. To date, however, the only effective method of fish eradication is the application of rotenone, a pesticide that is also toxic to nontarget native species. The objective of this study was to assess the effectiveness of intensive gill netting in eradicating the trout population from a small subalpine lake in the Sierra Nevada, California. We removed the resident trout population and a second trout population accidentally stocked into the study lake within 18 and 15 gill net sets, respectively. Adult trout were highly vulnerable to gill nets, but younger fish were not readily captured until they reached approximately 110 mm. To determine the utility of gill netting as a fish eradication technique in other Sierra Nevada lakes, we used morphometry data from 330 Sierra Nevada lakes to determine what proportion had characteristics similar to the study lake (i.e., small, isolated lakes with little s p awning hab i t at). We estimated that gill netting would be a viable eradication method in 15-20% of the high mountain lakes in the Sierra Nevada. We conclude that although gill netting is likely to be more expensive and time consuming than rotenone application, it is a viable alternative under some conditions and should ...
- You may send email to firstname.lastname@example.org 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.
CitationKnapp, R.A. and K.R. Matthews. 1998. Eradication of non-native fish from a small mountain lake: gill netting as a non-toxic alternative to the use of rotenone. Restoration Ecology 6:207-213.
- Sub-alpine amphibian distributions related to species palatability to non-native salmonids in the Klamath mountains of northern California
- Non-native fish introductions and the decline of the mountain yellow-legged frog from within protected areas
- Effects on nonnative fishes on wilderness lake ecosystems in the Sierra Nevada and recommendations for reducing impacts
XML: View XML