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

Minnesota Staff Member


William French

Email: fren0104@umn.edu
Research Publications Publication Date
Krider, L. A., J. A. Magner, J. Perry, L. Ferrington, and B. Vondracek. 2013. Air - water temperature relationships in the trout streams of southeastern Minnesota’s carbonate - sandstone landscape. Journal of the American Water Resources Association 49(4):896-907. | Abstract 2013-04-30
French, W. E., B. Vondracek, L. C. Ferrington, Jr., J. Finlay, and D. J. Dieterman. online. Winter feeding, growth and condition of brown trout Salmo trutta in a groundwater-dominated stream. To be submitted to Fisheries Management and Ecology | Abstract 2014-05-31
French, W. E., B. Vondracek, L. C. Ferrington, Jr., J. Finlay, and D. J. Dieterman. 2016. Brown trout Salmo trutta growth and condition along a winter thermal gradient in temperate streams. Canadian Journal of Fisheries and Aquatic Sciences 73:1-9. dx.doi.org/10.1139/cjfas-2016-0005 2016-07-31
French, W. E., B. D. S. Graeb, S. R. Chipps, K. N. Bertrand, T. M. Selch, and R. A. Klumb. 2010. Vulnerability of age-0 pallid sturgeon Scaphirhynchus albus to fish predation. Journal of Applied Ichthyology 26:6-10. | Download 2010-01-31
Carlson A. K., W. E. French, B. Vondracek, L. C. Ferrington Jr., J. E. Mazack, J. L. Cochran-Biederman. Online. Recent and Historical Trends in Growth of Brown Trout Salmo Trutta in Southeastern Minnesota Streams. Journal of Freshwater Ecology DOI: 10.1080/02705060.2016.1160449 2016-07-31
Andvik, R. T., J. A. VanDeHey, M. J. Fincel, W. E. French, K. N. Bertrand, S. R. Chipps, R. A. Klumb, and B. D. S. Graeb. 2010. Application of non-lethal stable isotope analysis to assess feeding patterns of juvenile pallid sturgeon Scaphirhynchus alubs: a comparison of tissue types and sample preservation methods. Journal of Applied Ichthyology 1-5. | Download | Publisher Website 2010-09-30
Presentations Presentation Date
French, W. E., B. Vondracek, L. C. Ferrington, Jr., J. Finley, and D. J. Dieterman. Relative position of brown trout in winter food webs of groundwater-dominated streams using stable isotope analysis. Midwest Fish and Wildlife Conference, 26-29 January 2014, Kansas City, Missouri. Summer interactions of stream-dwelling brown trout Salmo trutta within food webs have been frequently studied; however, relatively little is known during winter within food webs. Groundwater may increase the availability of potential prey and create more favorable foraging conditions for trout by maintaining relatively warm winter temperatures. We used stable isotope analysis to examine the relative position of brown trout in the aquatic food webs of 13 streams across the Driftless Ecoregion of southeastern Minnesota. Two tissue types with differing turnover rates (fin and mucus) were used to examine temporal, and spatial variation in relative food web position of brown trout. Although relative food web position varied both temporally and by individual, brown trout stable isotope signatures indicated aquatic invertebrates were likely the predominant prey source. Additionally, brown trout may have used a combination of allochthonous and autochthonous derived resources within the winter aquatic food web. 2014-01-28
French, W. E., B. Vondracek, L. C. Ferrington, Jr., J. Finley, and D. J. Dieterman. Pairing of stomach content and stable isotope analysis to examine winter trophic relationships of brown trout Salmo trutta in a groundwater-dominated stream. To be presented at the annual meeting of the Minnesota Chapter of the American Fisheries Society. 2013-03-12
Cochran-Biederman , J., W. French, and B. Vondracek. Diet and growth of brown trout in southeastern Minnesota: seasonal patterns across two years. Annual meeting of the American Fisheries Society. 2013-09-10