1. Department of Tisza Research, Institute of Aquatic Ecology, Centre for Ecological Research, 4026 Debrecen, Bem tér 18/c, Hungary and Nature Protection and Study Society - NATURA, Milana Rakića 20, 25000 Sombor, Serbia
2. Nature Protection and Study Society - NATURA, Milana Rakića 20, 25000 Sombor, Serbia
3. Department of Tisza Research, Institute of Aquatic Ecology, Centre for Ecological Research, 4026 Debrecen, Bem tér 18/c, Hungary