Oceanological and Hydrobiological Studies

Editor-in-Chief
Prof. Marcin Pliński, University of Gdansk, Poland

Managing Editor
M.Sc. Grzegorz Kozłowski, University of Gdańsk, Poland

Editorial Advisory Board
Prof. Jerzy Bolałek, University of Gdanńsk, Poland
Dr. Davide Bonaldo, Institute of Marine Science ISMAR. Italy
Prof. Ryszard K. Borówka, University of Szczecin, Poland
Prof. Jolanta Ejsmont-Karabin, Centre for Ecological Research PAS, Poland
Prof. Pertti Eloranta, University of Helsinki, Finland
Prof. Jan Harff, Leibniz-Institute for Baltic Sea Research, Germany
Prof. Ryszard Kornijów, National Marine Fisheries Reseach Institute, Poland
Prof. Adam Krężel, University of Gdañsk, Poland
Prof. Andreas Lehmann, GEOMAR Helmholtz Centre for Ocean Research Kiel, Germany
Prof. Horst Lange-Bertalot, Goethe University, Germany
Prof. Erkki Leppäkoski, Äbo Akademi University, Finland
Prof. Bernd Markert, Environmental Institute of Scientific Networks EISN, Germany
Prof. Harold Marshall, Old Dominion University, USA
Prof. Józef M. Pacyna, AGH University of Sciences and Technology, Poland
Prof. Anto Raukas, Tallinn Technical University, Estonia
Prof. Anna Szaniawska, University of Gdańsk, Poland
Prof. Piotr Szefer, Medical University of Gdańsk, Poland
D.Sc. Małgorzata Witak, University of Gdańsk, Poland
Prof. Maria Iwona Żmijewska, University of Gdańsk, Poland

Editors
D.Sc. Magdalena Bełdowska, University of Gdańsk, Poland
D.Sc. Witold Cieślikiewcz, University of Gdańsk, Poland
D.Sc. Konrad Ocalewicz, University of Gdańsk, Poland
D.Sc. Agnieszka Pociecha, Institute of Nature Conservation PAS, Poland
D.Sc. Adam Sokołowski, University of Gdańsk, Poland
D.Sc. Waldemar Surosz, University of Gdańsk, Poland
D.Sc. Małgorzata Witak, University of Gdańsk, Poland

Language Editors
Dr. Ewa Kaźmierczak, Evonymus Translation, Poland

Editorial Secretary
M.Sc. Marzena Płatek, University of Gdañsk, Poland

E-mail: ohs@ug.edu.pl

Publisher
DE GRUYTER POLAND
Bogumiła Zuga 32A Str.
01-811 Warsaw, Poland
T: +48 22 701 50 15