1. Apiculture Division, Institute of Animal Sciences, Warsaw University of Life Sciences—SGGW, 02-786 Warsaw, Poland
2. Department of Bees Breeding, Institute of Animal Husbandry and Breeding, Wroclaw University of Environmental and Life Sciences, 51-630 Wroclaw, Poland
3. Department of Landscape Art, Institute of Environmental Engineering, Warsaw University of Life Sciences—SGGW, 02-787 Warsaw, Poland
4. Department of Animal Environment Biology, Institute of Animal Sciences, Warsaw University of Life Sciences—SGGW, 02-786 Warsaw, Poland