1. Department of Apiculture and Sericulture, University of Agricultural Sciences and Veterinary Medicine, Calea Mănăştur 3-5, 400372, Cluj-Napoca, Romania
2. Department of Animal Productions and Food Security, University of Agricultural Sciences and Veterinary Medicine, Calea Mănăştur 3-5, 400372, Cluj-Napoca, Romania
3. Department of Biotechnology, University of Agricultural Sciences and Veterinary Medicine, Calea Mănăştur 3-5, 400372, Cluj-Napoca, Romania
4. Present address: Molecular Ecology, Martin-Luther-University Halle-Wittenberg, Hoher Weg 4, 06099, Halle (Saale), Germany
5. Present address: Behavioural Biology, University of Osnabrück, Barbarastraße 11, 49076, Osnabrück, Germany