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Strategies for conserving native salmonid populations at risk from nonnative fish invasions: tradeoffs in using barriers to upstream movementAuthor(s): Kurt D. Fausch; Bruce E. Rieman; Michael Young; Jason B. Dunham
Source: Gen. Tech. Rep. RMRS-GTR-174. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. 44 p.
Publication Series: General Technical Report (GTR)
Station: Rocky Mountain Research Station
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DescriptionNative salmonid populations in the inland West are often restricted to small isolated habitats at risk from invasion by nonnative salmonids. However, further isolating these populations using barriers to prevent invasions can increase their extinction risk. This monograph reviews the state of knowledge about this tradeoff between invasion and isolation. We present a conceptual framework to guide analysis, focusing on four main questions concerning conservation value, vulnerability to invasion, persistence given isolation, and priorities when conserving multiple populations. Two examples illustrate use of the framework, and a final section discusses opportunities for making strategic decisions when faced with the invasion-isolation tradeoff.
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CitationFausch, Kurt D.; Rieman, Bruce E.; Young, Michael, K.; Dunham, Jason B. 2006. Strategies for conserving native salmonid populations at risk from nonnative fish invasions: tradeoffs in using barriers to upstream movement. Gen. Tech. Rep. RMRS-GTR-174. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. 44 p.
Keywordsbarriers to fish movement, biological invasions, conservation biology, isolation management, native salmonids
- Invasion versus isolation: Trade-offs in managing native salmonids with barriers to upstream movement
- Optimizing habitat protection using demographic models of population viability.
- Analysis of trade-offs between threats of invasion by nonnative brook trout (Salvelinus fontinalis) and intentional isolation for native westslope cutthroat trout (Oncorhynchus clarkii lewisi)
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