1 Department of Wildlife, Fish, and Environmental Studies, Swedish University of Agricultural Sciences, Umeå, Sweden; Institute of Zoology, Zoological Society of London, London, UK. Electronic address: [email protected].
2 Norwegian Institute for Nature Research, Trondheim, Norway.
3 School of Aquatic and Fishery Sciences, University of Washington, Seattle, USA.
4 Department of Wildlife, Fish, and Environmental Studies, Swedish University of Agricultural Sciences, Umeå, Sweden.
5 Department of Wildlife, Fish, and Environmental Studies, Swedish University of Agricultural Sciences, Umeå, Sweden; Department of Zoology, Stockholm University, Stockholm, Sweden; School of Biological Sciences, Monash University, Melbourne, Australia.