1. Department of Fur-bearing Animal Breeding and Game Management, Faculty of Animal Bioengineering, University of Warmia and Mazury, Olsztyn, Poland
2. Department of Animal Genetic Resources Conservation, National Research Institute of Animal Production, Balice n. Kraków, Poland
3. Department of Commodity Science and Animal Raw Material Processing, Faculty of Animal Bioengineering, University of Warmia and Mazury, Olsztyn, Poland