Authors
Janina Dziekońska-Rynko
Department of Zoology, Faculty of Biology and Biotechnology, University of Warmia and Mazury, Olsztyn, Poland
Jerzy Rokicki
Department of Invertebrate Zoology and Parasitology, University of Gdańsk, Gdańsk, Poland
Katarzyna Mierzejewska
Department of Fish Biology and Pisciculture, Faculty of Environmental Sciences, University of Warmia and Mazury, Olsztyn, Poland