Managing Nonnative Fish

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.

Upper Colorado River Basin Nonnative and Invasive Aquatic Species Prevention and Control Strategy – May 2015.

Upper Colorado River Basin Nonnative and Invasive Aquatic Species Prevention and Control Strategy – February 2014.

Colorado Division Of Wildlife, Aquatic Wildlife Section. 2010. Yampa River Basin Aquatic Wildlife Management Plan.

Yampa River Nonnative Fish Control Strategy – June 30, 2008.

Directive of the Recovery Implementation Committee Regarding Nonnative Fish Management in the Yampa River Basin – October 13, 2006.

Final Nonnative Fish Management Policy – February 4, 2004.

Procedures for Stocking Nonnative Fish Species in the Upper Colorado River Basin, Revised April 14, 2009.

Procedures for Stocking Nonnative Fish Species in the Upper Colorado River Basin, September 5, 1996.

Procedures for Stocking Nonnative Fish Species in the Upper Colorado River Basin – Finding Of No Significant Impact (FONSI) -October 1996.

Procedures for Stocking Nonnative Fish Species in the Upper Colorado River Basin – Final Environmental Assessment (Final EA) -September 4, 1996.