Cooperative Research Units
Education, Research And Technical Assistance For Managing Our Natural Resources
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Effects of reservoir productivity and zooplankton composition on paddlefish population dynamics

Measuring a paddlefish from Keystone Reservoir.


August 2010 - December 2012


This study will investigate how resevoir producitivity (nutrient loading and chlorophyl) and zooplankton composition, especially the invasive species Daphnia lumholtzi, affects age, growth, and relative abundance of paddlefish Polyodon spathula.

Research Products and Activities


  • Nealis, A. 2013. Characteristics of two self-sustaining populations of paddlefish in northeast Oklahoma. Master's thesis, Oklahoma State University, Stillwater.

Current Staff

Federal Staff: 95

Masters Students: 238

Phd Students: 144

Post Docs: 54

University Staff: 239

5 Year Summary

Students graduated: 673

Scientific Publications: 1905

Presentations: 4235



  • James LongPrincipal Investigator
  • Ashley NealisStudent

Funding Agencies

  • Cooperative Research Unit Program


Cooperative Research Units Program Headquarters Cooperators

  1. U.S. Geological Survey