Affiliation: | 1. University of Warmia and Mazury – UWM, Faculty of Environmental Sciences, Department of Fish Biology and Pisciculture, 10‐917 Olsztyn, Poland;2. University of Warmia and Mazury ‐ UWM, Faculty of Environmental Sciences, Department of Ichthyology, 10‐917 Olsztyn, Poland;3. University of Warmia and Mazury – UWM, Faculty of Environmental Sciences, Department of Lake and River Fisheries, 10‐917 Olsztyn, Poland |