1. Department of Biology and Ecology of Fishes; Leibniz-Institute of Freshwater Ecology and Inland Fisheries; Müggelseedamm 310 12587 Berlin Germany
2. Division of Integrative Fisheries Management; Department of Crop and Animal Sciences; Faculty of Life Science; Humboldt-Universität zu Berlin; Invalidenstrasse 42 10115 Berlin Germany
3. Instituto Mediterráneo de Estudios Avanzados, IMEDEA (CSIC-UIB); C/Miquel Marqués 21 07190 Esporles, Illes Balears Spain
4. Angler Association of Lower Saxony; Bürgermeister-Stümpel-Weg 1 30457 Hannover Germany