1. Fram Centre, Norwegian Polar Institute, Tromsø, Norway
2. Department of Arctic and Marine Biology, University of Tromsø—The Arctic University of Norway, Tromsø, Norway
3. Department of Vertebrate Zoology, Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia
4. Arctic Research Station, Institute of Plant and Animal Ecology, Ural Branch of Russian Academy of Sciences, Labytnangi, Russia
5. Science Centre for Arctic Studies, State Organization of Yamal-Nenets Autonomous District, Salekhard, Russia