1. Institute of Animal Breeding, Department of Limnology and Fishery, Wrocław University of Environmental and Life Sciences, ul. Chełmońskiego 38c, 51-630 Wrocław, Poland
2. Institute of Animal Breeding, Department of Sheep and Fur Animals Breeding, Wrocław University of Environmental and Life Sciences, ul. Kożuchowska 5A, 51-631 Wrocław, Poland
3. Institute of Agroecology and Plant Production, Wrocław University of Environmental and Life Sciences, Grunwaldzki Sq. 24A, 50-363 Wrocław, Poland