1. Norwegian Institute for Nature Research, Fram Centre, PO Box 6606 Langnes, NO-9296 Tromsø, Norway
2. Norwegian Institute for Nature Research, PO Box 5685 Torgarden, NO-7485 Trondheim, Norway
3. Centre for Biodiversity Dynamics, Norwegian Institute for Science and Technology, PO Box 8900 Torgarden, NO-7491 Trondheim, Norway
4. Norwegian Institute for Water Research, Økernveien 94, NO-0579 Oslo, Norway
5. Norwegian Veterinary Institute, PO Box 4024 Angelltrøa, NO-7457 Trondheim, Norway
6. Laboratory for Freshwater Ecology and Inland (LFI), NORCE Norwegian Research Centre, PO Box 22 Nygårdstangen, NO-5838 Bergen, Norway
7. Institute of Marine Research, PO Box 1870 Nordnes, NO-5817 Bergen, Norway
8. Centre for Ecological and Evolutionary Synthesis, Department of Biosciences, University of Oslo, PO Box 1066 Blindern, NO-0316 Oslo, Norway