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Education, Research And Technical Assistance For Managing Our Natural Resources
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Influence of Prey Resources on Food Web Dynamics in Missouri River Impoundments

Duration

January 2008 - June 2011

Narrative

Inter- and intra- reservoir variation in prey fish composition and abundance has an important effect on sport fish populations in the Missouri River. Coldwater habitat in Lake Oahe, for example, provides refuge for rainbow smelt – a forage species that contributes significantly to walleye production. In contrast, prey fish populations in downstream impoundments are dominated by gizzard shad, cyprinids, and young-of-year sport fishes. In the late 1990s, the decline of rainbow smelt in Lake Oahe had significant impacts on walleye production. Although the smelt population has been recovering, low water levels combined with the recent expansion of gizzard shad in Lake Oahe have resulted in a unique food web never before observed in this system. As a result, factors affecting gizzard shad abundance and distribution in Lake Oahe and their contribution to the growth dynamics of walleyes are poorly understood.

Research Products and Activities

Presentations

  • Fincel, M. J., J. A. Van De Hey, and S. R. Chipps. February 3, 2009. Non-lethal sampling of walleye and yellow perch for stable isotope analysis: a comparison of three tissues. Annual Meeting, Minnesota-Wisconsin-Ontario Chapters, American Fisheries Society, Duluth, Minnesota.
  • Wuestewald, A., M. J. Fincel, J. A. Van De Hey, and S. R. Chipps. 2009. Comparing isotope signatures of prey fish: does gut removal affect 13C or 15N signatures? Annual Meeting, Dakota Chapter, American Fisheries Society, Bismarck, North Dakota.
  • Van De Hey, J. A., M. J. Fincel, and S. R. Chipps. February 24, 2009. Non-lethal sampling of walleye and yellow perch for stable isotope analysis: a comparison of three tissues. Annual Meeting, Dakota Chapter, American Fisheries Society, Bismarck, North Dakota.
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Current Staff

Federal Staff: 3

Masters Students: 7

Phd Students: 2

Post Docs: 0

University Staff: 3

5 Year Summary

Students graduated: 14

Scientific Publications: 50

Presentations: 138

 

Personnel

Funding Agencies

  • South Dakota Department of Game, Fish and Parks

Links

South Dakota Cooperative Fish and Wildlife Research Unit Cooperators

  1. South Dakota Game, Fish and Parks
  2. South Dakota State University
  3. U.S. Fish and Wildlife Service
  4. U.S. Geological Survey
  5. Wildlife Management Institute