1. Department of Salmonid FishesNorwegian Institute for Nature Research – NINA Trondheim Norway
2. Institute for Zoology, General Ecology & LimnologyUniversity of Cologne Köln Germany
3. The Ministry for Environment, Agriculture, Conservation and Consumer Protection of the State of North Rhine‐Westphalia (MULNV) Düsseldorf Germany
4. Wildlife Estonia Tartu Estonia