1. Department of Fisheries and Water Resources, School of Natural Resources; University of Energy and Natural Resources (UENR); P. O Box 214, Sunyani Ghana
2. Fisheries and Oceans Canada; 200 Kent Street Ottawa Ontario K1A 0E6 Canada
3. Algal Taxonomy and Ecology Inc.; P. O Box 761, Stony Mountain PO, 8050e PR 321N Stony Mountain Manitoba R0C 3A0 Canada
4. Biology Department and Large Lakes Observatory; University of Minnesota-Duluth; 2205 East Fifth Street Duluth Minnesota 55812 USA