1. Norwegian Institute for Nature Research, FRAM − High North Research Centre on Climate and the Environment,
NO-9296 Tromsø, Norway
2. Norwegian Institute for Water Research, Gaustadalléen 21, 0349 Oslo,
Norway, Norway
3. SINTEF Fisheries and Aquaculture, NO-7465 Trondheim,
Norway
4. Department of Zoology, University of Melbourne, Victoria 3010, Australia
5. National Veterinary Institute and Norwegian School of Veterinary Science, P.O. Box 8156 Dep., NO-0033 Oslo,
Norway
6. Norwegian Institute for Nature Research, Tungasletta 2, NO-7485
Trondheim, Norway