USGS - science for a changing world

U.S. Geological Survey - Great Lakes Science Center

Stephen Riley


Research Fishery Biologist Great Lakes Science Center Email: Phone: (734) 214-7279 Fax: (734) 994-8780 Professional Page:


B.Sc. (Biology), University of Waterloo, 1984
M.Sc. (Biology), University of Waterloo, 1986
Ph.D. (Fishery and Wildlife Biology), Colorado State University, 1992

Current Studies

Lake Huron Lake Trout Restoration

Lake trout Salvelinus namaycush historically were the keystone predator and supported a valuable commercial fishery in the Laurentian Great Lakes until the extirpation of most populations by the 1950s. Lake trout have been stocked throughout the Great Lakes since the 1970s, but aside from local progress in restoration in Lake Huron, rehabilitation has occurred only in Lake Superior. Recently, ecosystem changes in Lake Huron have resulted in the lakewide recruitment of wild adult lake trout. The USGS GLSC works cooperatively with a variety of agencies (MDNR, OMNR, CORA, USFWS) to conduct long-term gill net surveys to assess the population status of lake trout in Lake Huron. Assessment of long-lived fish such as lake trout can only be achieved through long-term population surveys.

Principal Investigator: Stephen Riley

Recent Publications

Taaja R. Tucker, Patrick L. Hudson, and Stephen C. Riley 2016. Observations of cocooned Hydrobaenus (Diptera: Chironomidae) larvae in Lake Michigan. Elsevier . Journal of Great Lakes Research . 42 (5). 1129-1135.
Contribution #2071
Carson G. Prichard, Edward F. Roseman, Kevin M. Keeler, Timothy P. O'Brien, and Stephen C. Riley 2016. Large-Scale Changes in Bloater Growth and Condition in Lake Huron. Taylor & Francis . Transactions of the American Fisheries Society . 145 (6). 1241-1251.
Contribution #2068
Thomas R. Binder, Stephen C. Riley, Christopher M. Holbrook, Michael J. Hansen, Roger A. Bergstedt, Charles R. Bronte, Ji He, Charles C. Krueger 2016. Spawning site fidelity of wild and hatchery lake trout (Salvelinus namaycush) in northern Lake Huron. NRC Research Press . Canadian Journal of Fisheries and Aquatic Sciences . 73 (1). 18-34.
Contribution #1950
Thomas R. Binder, Henry T. Thompson, Andrew M. Muir, Stephen C. Riley, J. Ellen Marsden, Charles R. Bronte, Charles C. Krueger 2015. New insight into the spawning behavior of lake trout, Salvelinus namaycush, from a recovering population in the Laurentian Great Lakes. Springer . Environmental Biology of Fishes . 98 (1). 173-181.
Contribution #1825
Langseth, Brian J., Michael L. Jones, Stephen C. Riley 2014. The effect of adjusting model inputs to achieve mass balance on time-dynamic simulations in a food-web model of Lake Huron. Ecological Modelling . 273 44-54.
Contribution #1804

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