1. Norwegian Institute
for Nature Research, FRAM—High North Research Centre on Climate and the Environment, NO-9296
Tromsø, Norway
2. Department of Arctic and Marine
Biology, University of Tromsø, NO-9037
Tromsø, Norway
3. Oddatunet, NO-7057 Jonsvatnet,
Norway
4. Norwegian Institute
for Air Research, FRAM—High North Research Centre on Climate and the Environment, NO-9296
Tromsø, Norway
5. Environment Canada, Science and Technology Branch, Toronto, ON, M3H 5T4, Canada
6. Norwegian School of Veterinary Science (NSVS), P.O. Box 8146 Dep., N-0033 Oslo, Norway