1. Fjellstyrene i Lierne, Heggvollveien 6, NO-7882 Nordli, Norway
2. Nord University, Faculty of Biosciences and Aquaculture, PO Box 2501, NO-7729 Steinkjer, Norway
3. Norwegian Institute for Nature Research, PO Box 5685 Torgarden, NO-7485 Trondheim, Norway