Authors
Grażyna Mazurkiewicz-Boroń
Institute of Nature Conservation Karol Starmach Department of Freshwater Biology, Polish Academy of Sciences, Kraków, Poland
Teresa Bednarz
Institute of Nature Conservation Karol Starmach Department of Freshwater Biology, Polish Academy of Sciences, Kraków, Poland
Elżbieta Wilk-Woźniak
Institute of Nature Conservation Karol Starmach Department of Freshwater Biology, Polish Academy of Sciences, Kraków, Poland