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Rocky Mountain Research Station

General Technical Report

Version 1.0 -- January 2002


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Recovery History of Greenback Cutthroat Trout: Population Characteristics, Hatchery Involvement, and Bibliography

Michael K. Young
Amy L. Harig
Bruce Rosenlund
Chris Kennedy


The greenback cutthroat trout (Oncorhynchus clarki stomias) is native to the mountain and foothill waters of the South Platte and Arkansas river basins in Colorado. This taxon declined rapidly beginning near the turn of the century and was listed under the Endangered Species Act in 1973. We assembled all available information from a variety of sources to document recovery efforts from 1957 to 1999. For each greenback cutthroat trout population, we noted (1) the characteristics of recovery waters and dates of population discovery or introduction; (2) fish abundance estimates; (3) analyses of genetic purity; (4) salmonid fauna, removal efforts, and reinvasions; and (5) dates, sources, and numbers of fish used to establish populations. For each hatchery used to assist recovery, we noted (1) sources and numbers of fish delivered to them; (2) sources, sex ratios, and production of fish used to create particular year classes; and (3) dates, numbers, and sizes of hatchery fish shipped to establish wild populations or supplement other hatchery stocks.

Keywords: threatened species, greenback cutthroat trout, Oncorhynchus clarki stomias, recovery

The Authors

Michael K. Young is with the Rocky Mountain Research Station in Laramie, Wyoming. Amy L. Harig is with Trout Unlimited in Boulder, Colorado. Bruce Rosenlund and Chris Kennedy are with the Colorado Fish and Wildlife Assistance Office of the U.S. Fish and Wildlife Service in Lakewood, Colorado.


We thank the following individuals for providing data or for other contributions to this report: Robert Behnke, Kevin Bestgen, Mindy Clark, Stephanie Comfort, Karl Cordova, Steven Culver, Pat Dwyer, Kurt Fausch, Pete Gallagher, Paula Guenther-Gloss, Larry Harris, Ken Kehmeier, Doug Krieger, Bill Krise, Jim Melby, Tom Nesler, Greg Policky, Nick Schmal, Phil Schler, Ed Stege, Harry Vermillion, Mary Kay Watry, and David Winters.



Results and Discussion



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Title: RMRS-GTR-88WWW: Recovery History of Greenback Cutthroat Trout: Population Characteristics, Hatchery Involvement, and Bibliography
Electronic Publish Date: January 22, 2002
Last Update:
January 20, 2010

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