1. Department of Surface Waters-Research and Management; Center for Ecology, Evolution and Biogeochemistry; Eawag; Swiss Federal Institute of Aquatic Science and Technology; Kastanienbaum Switzerland
2. Zoological Institute; University of Basel; Basel Switzerland
3. Eawag; Aquatic Ecology Department; Center for Ecology, Evolution and Biogeochemistry; Kastanienbaum Switzerland
4. Eawag; Department of Fish Ecology and Evolution; Center for Ecology, Evolution and Biogeochemistry; Kastanienbaum Switzerland
5. Aquatic Ecology and Evolution; Institute of Ecology & Evolution; University of Bern; Bern Switzerland
6. Department of Biology; University of Fribourg; Fribourg Switzerland