Predation or competition by nonnative fish species is a serious threat to the endangered fishes and perhaps the most challenging to manage. The Recovery Program is working proactively to meet the challenge of nonnative fish management by removing the most problematic nonnative fishes from rivers, and preventing nonnative fish from entering the river system in areas inhabited by endangered fish. The actions recognize the dual responsibilities of state and federal wildlife agencies to conserve native fish species while providing sportfishing opportunities.
Interim Principles for Stocking Sterile Walleye in the Upper Colorado River Basin – May 2022
List of Compatible and Non-Compatible Nonnative Species in the Upper Colorado River Basin.
Yampa River Nonnative Fish Control Strategy – June 30, 2008.
Final Nonnative Fish Management Policy – February 4, 2004.
Procedures for Stocking Nonnative Fish Species in the Upper Colorado River Basin, September 5, 1996.