Authors
Department of Fisheries Bioeconomics, Stanisław Sakowicz Inland Fisheries Institute in Olsztyn, Olsztyn, Poland
© 2021 Marek Trella, Arkadiusz Wołos, published by Stanisław Sakowicz Inland Fisheries Institute
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.