[1] Univ Pecs, Fac Sci, Dept Ecol, Ifjusag Utja 6, H-7624 Pecs, Hungary
[2] BioRes Ltd Partnership, Barackvirag Utca 27, H-7624 Pecs, Hungary
[3] Ctr Ecol Res, Inst Aquat Ecol, Dept Tisza Res, Bem Ter 18-C, H-4026 Debrecen, Hungary
[4] Nat Protect & Study Soc NATURA, Milana Rakica 20, Sombor 25000, Serbia