1. Swedish University of Agricultural Sciences, Department of Aquatic Resources, Institute of Marine Research, Turistgatan 5, 45330 Lysekil, Sweden
2. Thünen Institute for Baltic Sea Fisheries, Alter Hafen Süd 2, 18069 Rostock, Germany
3. National Marine Fisheries Research Institute, Department of Fisheries Resources, Kołłątaja 1, 81-332 Gdynia, Poland
4. National Marine Fisheries Research Institute, Department of Logistics and Monitoring, Kołłątaja 1, 81-332 Gdynia, Poland
5. University of Bologna, Department of Biological, Geological and Environmental Sciences, Via Selmi 3, 40126 Bologna, Italy