1. Great Lakes Institute for Environmental
Research, University of Windsor, Windsor,
ON N9B 3P4, Canada
2. Department
of Biology, Dalhousie University, Halifax,
NS B3H 4R2, Canada
3. Fisheries and Oceans Canada, Winnipeg, MB R3T 2N6, Canada
4. School of Environmental Sciences, University of Guelph, Guelph, ON N1G 2W1, Canada
5. Environment Canada, Aquatic Ecosystem Protection Research Division, Burlington, ON
L7R 4A6, Canada