1. Department of Aquaculture , Stanisław Sakowicz Inland Fisheries, Institute in Olsztyn , Poland
2. Department of Ichthyology and Aquaculture, Faculty of Animal, Bioengineering , University of Warmia and Mazury in Olsztyn , Poland
3. Department of Salmonid Research , Stanisław Sakowicz Inland, Fisheries Institute in Olsztyn , Poland
4. Chair of Hydrobiology, Ichthyology, and Biotechnology of Reproduction, Faculty of Food Sciences and Fisheries , West Pomeranian University of Technology in Szczecin , Poland