Authors
Piotr Traczuk
Department of Lake Fisheries, Giżycko, Inland Fisheries Institute in Olsztyn, Poland
Andrzej Kapusta
Department of Ichthyology, Hydrobiology, and Aquatic Ecology, Inland Fisheries Institute in Olsztyn, Poland
© 2017 Piotr Traczuk, Andrzej Kapusta, published by Stanisław Sakowicz Inland Fisheries Institute
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.