Cooperative Research Units
Education, Research And Technical Assistance For Managing Our Natural Resources
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Research directed at the recovery of endangered mussels


August 2006 - December 2010


The objectives of this study are:

1. Determine the current status of endangered mussels in the Green River from the Green River Dam (GRD)
downstream through Mammoth Cave National Park;
2. Determine whether modifications made to the discharge regime from the Green River Dam are
enhancing mussel recruitment;
3. If deemed necessary, establish captive breeding populations of ringpinks, clubshells, and northern
riffleshells mussels;
4. Determine various aspects of the life histories of endangered species present; and,
5. As necessary, make recommendations to the U.S. Army Corps of Engineers, and the U.S. Fish and
Wildlife Service regarding further modifications to the discharge regime of the GRD, and the need to
propagate endangered mussels.


Current Staff

Federal Staff: 95

Masters Students: 240

Phd Students: 143

Post Docs: 52

University Staff: 245

5 Year Summary

Students graduated: 702

Scientific Publications: 1948

Presentations: 4251



  • James LayzerPrincipal Investigator

Funding Agencies

  • Corps of Engineers

Cooperative Research Units Program Headquarters Cooperators

  1. U.S. Geological Survey