1. Ornithological Station, Museum and Institute of Zoology Polish Academy of Sciences, Poland
2. Institute of Nature Conservation, Polish Academy of Sciences, Kraków, Poland
3. Laboratory of Biology and Ecology of Parasites, Faculty of Biotechnology and Animal Husbandry, West Pomeranian University of Technology in Szczecin, Szczecin, Poland
4. Institute of Marine and Environmental Sciences, Szczecin University, Szczecin, Poland