Authors
Michał Skóra
Department of Migratory Fish, Inland Fisheries Institute in Olsztyn, Gdańsk, Poland
Mariusz Sapota
Department of Marine Biology and Ecology, Institute of Oceanography, University of Gdansk, Gdynia, Poland
Krzysztof Skóra
Hel Marine Station, Institute of Oceanography, University of Gdansk, Hel, Poland
Anna Pawelec
Department of Marine Biology and Ecology, Institute of Oceanography, University of Gdansk, Gdynia, Poland