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    Author(s): Michael K. Young
    Date: 2008
    Source: Gen. Tech. Rep. RMRS-GTR-207. Fort Collins, CO: USDA Forest Service, Rocky Mountain Station. 123 p.
    Publication Series: General Technical Report (GTR)
    Station: Rocky Mountain Research Station
    PDF: Download Publication  (1.0 MB)


    The Colorado River cutthroat trout (Oncorhynchus clarkii pleuriticus) was once distributed throughout the colder waters of the Colorado River basin above the Grand Canyon. About 8 percent of its historical range is occupied by unhybridized or ecologically significant populations. It has been petitioned for listing under the Endangered Species Act and is accorded special status by several state and federal agencies. Habitat alteration and nonnative trout invasions led to the extirpation of many populations and impede restoration. Habitat fragmentation exacerbated by climate change is an emerging threat. A strategic, systematic approach to future conservation is likely to be the most successful.

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    Young, Michael K. 2008. Colorado River cutthroat trout: a technical conservation assessment. Gen. Tech. Rep. RMRS-GTR-207. Fort Collins, CO: USDA Forest Service, Rocky Mountain Station. 123 p.


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    Colorado River cutthroat trout, Oncorhynchus clarkii pleuriticus

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