1. Department of Ecology and Natural Resource Management; Norwegian University of Life Sciences; Ås Norway
2. Grimsö Wildlife Research Station; Department of Ecology; Swedish University of Agricultural Sciences; Riddarhyttan Sweden
3. Department of Chemistry, Biotechnology and Food Science; Norwegian University of Life Sciences; Ås Norway
4. Department of Wildlife, Fish, and Environmental Studies; Swedish University of Agricultural Sciences; Umeå Sweden
5. Norwegian Institute for Nature Research; Trondheim Norway