Cooperative Research Units
Education, Research And Technical Assistance For Managing Our Natural Resources
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William's Fork

Ryan Fitzpatrick and Dana Winkelman sampling for T. tubifex on Williams Fork River, CO.


May 2004 - December 2005


The physical variables influencing the distribution and abundance of Tubifex tubifex in stream habitats are not well understood and could have implications for the success of using resistant T. tubifex lineages to manage whirling disease. Our primary objective was to evaluate if sediment size distribution and other physical microhabitat factors were associated with lineage composition of T. tubifex. Our second objective was to randomly sample stream habitats to gain a more complete understanding of T. tubifex distribution across a wide variety of stream habitat types.

Research Products and Activities

Technical Publications

  • Winkelman, D.L., Kevin Thompson, and James Terrell. 2005. The role of sediment size distribution and other microhabitat factors in the abundance and relative dominance of various T. tubifex lineages. Final Report to the Montana Water Center, Whirling Disease Initiative.Abstract |

Current Staff

Federal Staff: 95

Masters Students: 239

Phd Students: 142

Post Docs: 53

University Staff: 240

5 Year Summary

Students graduated: 701

Scientific Publications: 1936

Presentations: 4260



Funding Agencies

  • Montana State University


Cooperative Research Units Program Headquarters Cooperators

  1. U.S. Geological Survey