1. Institute of Zoology, Poznań University of Life Sciences, Wojska Polskiego 71C, 60-625 Poznań, Poland;
2. Polish Hunting Association, Research Station, 64-020 Czempiń, Poland
3. Faculty of Biological Sciences, Department of Nature Conservation, University of Zielona Góra, Szafrana 1, 65-516 Zielona Góra, Poland
4. Department of Animal Nutrition and Feed Management, Poznań University of Life Sciences, Wołyńska 33, 60-637 Poznań, Poland
5. Department of Forest Biodiversity, Institute of Forest Ecology and Silviculture, Faculty of Forestry, University of Agriculture, al. 29 Listopada 46, 31-425 Kraków, Poland