Authors
Jolanta Ejsmont-Karabin
Department of Hydrobiology, Institute of Biology, University of Białystok, Białystok, Poland
Andrzej Hutorowicz
The Stanisław Sakowicz Inland Fisheries Institute, Olsztyn-Kortowo, Poland
© 2011 Jolanta Ejsmont-Karabin, Andrzej Hutorowicz, published by University of Gdańsk
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.