1. Department of Marine Plankton Research, Institute of Oceanography University of Gdansk Gdynia Poland
2. Department of Arctic and Marine Biology, Faculty of Biosciences, Fisheries and Economics The Arctic University of Norway Tromsø Norway
3. Scottish Association for Marine Science Oban UK
4. Department of Biology, Faculty of Natural Sciences Norwegian University of Science and Technology Trondheim Norway
5. Department of Ecology Institute of Oceanology, Polish Academy of Sciences Sopot Poland
6. Department of Vertebrate Ecology and Zoology, Faculty of Biology University of Gdansk Gdańsk Poland