1. National Institute of Aquatic Resources Technical University of Denmark Silkeborg Denmark
2. National Institute of Aquatic Resources Technical University of Denmark Kgs. Lyngby Denmark
3. Institute of Sea Fisheries Bremerhaven Germany
4. Institute of Marine Ecosystem and Fishery ScienceUniversity of Hamburg Hamburg Germany
5. Evolutionary Ecology of Marine FishesGEOMAR Helmholtz Center for Ocean Research Kiel Kiel Germany
6. Thünen Institute of Baltic Sea Fisheries Rostock Germany