Mountain lake non-native fish eradication pretreatment planning reconnaissance surveys of Kettling, Skymo, and Sourdough Lakes at North Cascades National Park Service Complex, Washington: 2010 data summary
Bodensteiner L, Glesne R, Rawhouser A. 2013. Mountain lake non-native fish eradication pretreatment planning reconnaissance surveys of Kettling, Skymo, and Sourdough Lakes at North Cascades National Park Service Complex, Washington: 2010 data summary. Natural Resource Data Series. NPS/NOCA/NRDS—2013/446. National Park Service. Fort Collins, Colorado
Ninety- three naturally fishless mountain lakes found in the park complex have been stocked with non-native trout, and currently 33 of these lakes contain naturally reproducing populations. These self-sustaining fish populations have the ability to overpopulate with multiple age classes, effectively dominating many trophic levels and consuming excessive amounts of their prey base. In addition, non-native trout are dispersing downstream from lakes and competing or hybridizing with native fish. NPS Natural Resource Preservation Program (NRPP) funds have been obligated for the period of 2012-2014 to eliminate naturally reproducing fish populations in five lakes. Fish eradication in three of these lakes (Sourdough, Kettling, and Skymo Lakes) will be accomplished by chemical treatment using rotenone. The inherent complexity of lake and stream restoration projects using piscicides requires a comprehensive examination of a large number of physical, chemical and biological parameters that are used in the planning, implementation, and evaluation phases of the project. To address these needs, the objectives of this project were: 1. Provide basic physical, chemical, and biological data required for development of the Treatment Plans (e.g., lake bathymetry and features, hydrology, water temperature, pH and dissolved oxygen profiles; characteristics of the non-native fish population; identification of non-target native species of concern and their distribution etc.) 2. Provide baseline biological data for evaluation of impacts of the rotenone treatment on native zooplankton, macroinvertebrate, and amphibian communities and recovery of these communities in the absence of fish predation. Site descriptions, methods and results of these data collection efforts are summarized in this report.
- Type
- Published Report
- Authors
- Bodensteiner, Leo; Glesne, Reed; Rawhouser, Ashley
- Date of Issue
- 2013-02
- Publisher
- National Park Service
- Units
- LACH , NOCA , NRSS , ROLA
- Keywords
- Age class, Amphibian, aquatic vegetation, Bathymetry, BMI, Brook Trout, Bull Trout, chlorophyll-a, Crustacean, Depth, Dissolved Oxygen, Eradication, Fish, gill net, Hybridization, Inlet, Kettling Lake, long-toed salamander, Macroinvertebrate, Mountain Lake, Native, Natural Resource Preservation Program, Non-Native, outlet, pH, piscicide, Population, Predation, profile, Rainbow Trout, re-colonization, Restoration, rotenone, Salmonid, Skymo Lake, Sourdough Lake, Stocking, Stream, Substrate, Temperature, treatment plan, Trophic Level, trophic state index, Trout, TSI, Visual Encounter Survey, Volume, Westslope cutthroat trout, Woody Debris, Zooplankton
- Subjects
- Ecological Framework: Biological Integrity | Invasive Species | Invasive/Exotic animals , Ecological Framework: Biological Integrity | Focal Species or Communities | Fishes