Cooperative Fish and Wildlife Research Units Program: Utah
Education, Research and Technical Assistance for Managing Our Natural Resources

Utah Project

Population Genetics and Feminization Trials for Red Shiner

January 2024 - December 2026


Participating Agencies

  • BOR- Gila River Basin Native Fishes Conservation Program

Problem statement: Competition and predation from nonnative fishes have substantially impacted native fish populations in the southwestern United States. Red Shiner Cyprinella lutrensisare are among the fastest expanding invaders in the Southwest and are among the most invasive species due to their negative impacts on native fish communities.

So What? Why this research matters: Traditional removal efforts to extirpate invasive Red Shiner populations are ineffective. Developing alternative population mitigation strategies, such as the Trojan Sex Chromosome strategy, need to be investigated for the potential control of invasive Red Shiner populations.

Partners: The project is a collaboration of researchers across multiple agencies and includes the U.S. Bureau of Reclamation and State and Federal natural resource managers in the Southwest.

Research that informs decisions: Critical data will be collected on Red Shiner sex determination systems among various populations. This information, along with the development of optimal feminization strategies, are crucial in the implementation of a Trojan Sex Chromosome eradication strategy that may be able to extirpate invasive Red Shiner populations.