Disclaimer:

The Nonindigenous Occurrences section of the NAS species profiles has a new structure. The section is now dynamically updated from the NAS database to ensure that it contains the most current and accurate information. Occurrences are summarized in Table 1, alphabetically by state, with years of earliest and most recent observations, and the tally and names of drainages where the species was observed. The table contains hyperlinks to collections tables of specimens based on the states, years, and drainages selected. References to specimens that were not obtained through sighting reports and personal communications are found through the hyperlink in the Table 1 caption or through the individual specimens linked in the collections tables.

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Common name: Snake River Finespotted Cutthroat Trout

Synonyms and Other Names: Oncorhynchus clarkii carmichaeli, Jackson Hole cutthroat trout.

Taxonomy: available through www.itis.gov

Identification: Oncorhynchus clarki behnkei can be distinguished from Yellowstone (O. c. bouvieri) and other varieties of cutthroat trout by the profuse distribution of small spots on body and dorsal, adipose, and caudal fins (Behnke 2002; Page and Burr 2011).

Native Range: Upper Snake River (and tributary streams downstream of and including Gros Ventre River) between Palisades Reservoir and Jackson Lake; Wyoming and Idaho (Behnke 2002; Page and Burr 2011).

Alaska	Hawaii	Puerto Rico & Virgin Islands	Guam Saipan

Hydrologic Unit Codes (HUCs) Explained
Interactive maps: Point Distribution Maps

Means of Introduction: Stocked for sport

Remarks: Finespotted cutthroat trout are derived from Yellowstone cutthroat trout (O. c. bouvieri); these two species are morphologically similar (except for spotting pattern and subtle color differences) and are presently genetically indistinguishable. Some authors consider finespotted cutthroat trout as a morphological variant of O. c. bouvieri, whereas others consider it a valid subspecies (Behnke 2002).

References: (click for full references)

Behnke, R.J. 2002. Trout and salmon of North America. The Free Press, New York, NY.

Page, L.M., and B.M. Burr. 2011. Field guide to freshwater fishes of North America north of Mexico. Peterson Field Guides series. Houghton Mifflin Harcourt, Boston, MA.

Rasmussen, J.L. 1998. Aquatic nuisance species of the Mississippi River basin. 60th Midwest Fish and Wildlife Conference, Aquatic Nuisance Species Symposium, Dec. 7, 1998, Cincinnati, OH.

Other Resources:

Author: Matt Neilson, and Pam Fuller

Peer Review Date: 5/30/2012

This information is preliminary or provisional and is subject to revision. It is being provided to meet the need for timely best science. The information has not received final approval by the U.S. Geological Survey (USGS) and is provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the information.