Authors
Magdalena Grabowska
Department of Hydrobiology, University of Białystok, Białystok, Poland
Hanna Mazur-Marzec
Department of Marine Biology and Ecology, University of Gdańsk, Gdynia, Poland
© 2011 Magdalena Grabowska, Hanna Mazur-Marzec, published by University of Gdańsk
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.