1. School of Biological Sciences, University of Aberdeen, Zoology Building, Tillydrone Avenue, Aberdeen AB24 2TZ, UK.
2. Department of Arctic and Marine Biology, University of Tromsø, N-9037 Tromsø, Norway.
3. Centre d’Etudes Biologiques de Chizé, CNRS, UPR 1934, Beauvoir sur Niort, 79360, France.
4. Department of Biosciences, Post Office Box 65 (Viikinkaari 1), University of Helsinki, FI–00014 Helsinki, Finland.
5. Observatoire des Sciences de l’Univers de Rennes, UMR CNRS 6553 Ecobio, Université de Rennes 1-UEB, Avenue Général Leclerc, 35042 Rennes cedex, France.
6. Department of Wildlife, Fish and Environmental Studies, Swedish University of Agricultural Sciences, 90183 Umeå, Sweden.
7. Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Post Office Box 7050, 75007 Uppsala, Sweden.
8. Biomathematics and Statistics Scotland, Craigiebuckler, Aberdeen AB15 8QH, UK.
9. Norwegian Institute for Nature Research, Gaustadalleen 21, 0349 Oslo, Norway.
10. Finnish Forest Research Institute, Vantaa Unit, Post Office Box 18, FI-01301 Vantaa, Finland.
11. Finnish Forest Research Institute, Suonenjoki Unit, Juntintie 154, FI-77600 Suonenjoki, Finland.
12. Julius Kühn-Institute, Federal Research Centre for Cultivated Plants, Institute for Plant Protection in Horticulture and Forests, Toppheideweg 88, 48161 Münster, Germany.
13. Mammal Research Institute, Polish Academy of Sciences, 17-230 Białowieża, Poland.
14. Centre for Human and Ecological Sciences, Forest Research, Northern Research Station, Roslin, Midlothian EH25 9SY, UK.
15. Palacky University Olomouc, Department of Ecology and Environmental Sciences, 77146 Olomouc, Czech Republic.
16. Institute of Vertebrate Biology, Academy of Sciences of the Czech Republic, 675 02 Studenec 122, Czech Republic.