1. Department of Wildlife Fish & Environmental Studies Swedish University of Agricultural Sciences (SLU) Umeå Sweden
2. Great Lakes Laboratory for Fisheries and Aquatic Sciences, Fisheries and Oceans Canada 867 Lakeshore Road Burlington Ontario L7S 1A1 Canada
3. Faculty of Fisheries and Protection of Waters South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses University of South Bohemia in Ceske Budejovice Zatisi 728/II Vodnany Czech Republic
4. Department of Collective Behaviour Max Planck Institute of Animal Behavior Konstanz Germany
5. Centre for the Advanced Study of Collective Behaviour University of Konstanz Konstanz Germany
6. Department of Biology University of Konstanz Konstanz Germany