1. Department of Molecular Evolution; University of Gdansk; Gdansk Poland
2. Department of Salmonid Research; Inland Fisheries Institute in Olsztyn; Rutki Zukowo Poland
3. Department of Marine Biology and Ecology; Institute of Oceanography; University of Gdansk; Gdynia Poland
4. Department of Ichthyology; University of Warmia and Mazury in Olsztyn; Olsztyn Poland