1. I. M. Garfelt-Paulsen, V. Ravolainen, E. Fuglei and Å. Ø. Pedersen (https://orcid.org/0000-0001-9388-7402) ✉ (aashild.pedersen@npolar.no), Norwegian Polar Inst., Fram Centre, Tromsø, Norway.
2. E. M. Soininen, UiT – Arctic Univ. of Norway, Dept of Arctic and Marine Biology, Tromsø, Norway.
3. L. E. Loe, Norwegian Univ. for Life Sciences, Faculty of Environmental Sciences and Natural Resource Management, Ås, Norway.
4. B. B. Hansen, Centre for Biodiversity Dynamics, Dept of Biology, Norwegian Univ. of Science and Technology, Trondheim, Norway.
5. R. J. Irvine, The James Hutton Inst., Craigiebuckler, Aberdeen, Scotland, UK, and: Frankfurt Zoological Society, Addis Ababa, Ethiopia.
6. A. Stien, Norwegian Inst. for Nature Research, Fram Centre, Tromsø, Norway.
7. E. Ropstad, Norwegian Univ. for Life Sciences, Faculty of Veterinary Medicine, Oslo, Norway.
8. V. Veiberg, Norwegian Inst. for Nature Research, Trondheim, Norway.