1. Department of Biological and Environmental Science; University of Jyväskylä; Jyväskylä Finland
2. Faculty of Biosciences, Fisheries and Economics; The Norwegian College of Fishery Science; UiT The Arctic University of Norway; Tromsø Norway
3. School of Aquatic and Fishery Sciences; University of Washington; Seattle WA USA
4. Department of Environmental Sciences; University of Helsinki; Helsinki Finland
5. Lammi Biological Station; University of Helsinki; Lammi Finland