1. Institute of Marine Biological Resources and Inland Waters, Hellenic Centre for Marine Research, Anavyssos, Greece
2. Department of Ecology, Faculty of Science, Charles University, Prague 2, Czech Republic
3. Department of Biology, National and Kapodistrian University of Athens, Athens, Greece
4. Hydrobiology–Ichthyology Lab, Department of Ichthyology and Aquatic Environment (DIAE), University of Thessaly, Volos, Greece
5. Department of Zoology, National Museum, Prague 1, Czech Republic
6. Department of Basic Sciences, Faculty of Fisheries, Muğla Sıtkı Koçman University, Muğla, Turkey
7. Department of Ecology and Vertebrate Zoology, Faculty of Biology and Environmental Protection, University of Łodz, Łodz, Poland