1. Aquatic Ecology and Evolution; Institute of Ecology & Evolution; University of Bern; Bern Switzerland
2. Department of Fish Ecology and Evolution; EAWAG Swiss Federal Institute of Aquatic Science and Technology; Center for Ecology, Evolution and Biogeochemistry; Kastanienbaum Switzerland
3. Department of Aquaculture and Fish Biology; Hólar University College; Sauðárkrókur Iceland