1. Department of Aquaculture and Fish BiologyHólar University Sauðárkrókur, 551 Iceland
2. Icelandic Museum of Natural History, Brynjólfsgata 5 Reykjavík IS‐107 Iceland
3. Institute of Biodiversity, Animal Health & Comparative MedicineUniversity of Glasgow Glasgow, G12 8QQ U.K.
4. Animal Ecology, Department of Ecology and Genetics, Science for Life LaboratoryUppsala University, Norbyvägen 18D Uppsala, SE‐752 36 Sweden
5. Department of Aquatic EcologyEAWAG, Swiss Federal Institute of Aquatic Science and Technology, and Institute of Integrative Biology, ETH‐Zurich, Ueberlandstrasse 133 CH‐8600 Dübendorf Switzerland
6. Department of Integrative BiologyUniversity of Guelph Guelph, Ontario N1G 2W1 Canada
7. Scottish Centre for Ecology and the Natural Environment, IBAHCMUniversity of Glasgow Glasgow G12 8QQ U.K.
8. Freshwater Ecology Group, Department of Arctic and Marine Biology, Faculty of Biosciences, Fisheries and EconomicsUniversity of Tromsö Tromsö, N‐9037 Norway
9. Department of Ecology and Environmental ScienceUmeå University Umeå, SE‐90187 Sweden
10. Scottish Natural Heritage, Caspian House, Mariner Court, Clydebank Business Park Clydebank, G81 2NR U.K.
11. Department of Integrative BiologyMichigan State University East Lansing, MI 48824 U.S.A.
12. Institute of Life and Environmental SciencesUniversity of Iceland Reykjavik, 101 Iceland
13. PR statistics LTD, 53 Morrison Street Glasgow, G5 8LB UK
14. Inland Norway University of Applied Sciences, Department of Forestry and Wildlife Management, Campus Evenstad, Anne Evenstadvei 80 Koppang, NO‐2480 Norway
15. School of BiologyUniversity of St Andrews, St. Andrews Fife, KY16 9AJ U.K.