Somogyi Múzeumok Közleményei 17/B. - Természettudományi tanulmányok (2006)

Majer, József and Krčmar, Stjepan: Geographical distribution of Tabanids (Diptera: Tabanidae) of the Drava river along the Somogy County (Hungary), the Koprivničko-križevačka and one part Virovitičko-podravska County (Croatia) - Somogy-megye (Magyarország), Kapronca- és részben Verőce-megye (Horvátország) Dráva-menti bögölyeinek földrajzi előfordulása

Somogyi Múzeumok Közleményei В - Természettudomány 17: 183-198(2006) Kaposvár, 2007 Geographical distribution of Tabanids (Diptera: Tabanidae) of the Drava river along the Somogy County (Hungary), the Koprivniĉko-krizevaĉka and one part Viroviticko-podravska County (Croatia) 1 JÓZSEF MAJER* and 2 STJEPAN KRCMAR** 1 Faculty of Science, General and Applied Ecology Department, University of Pécs, Ifjúság útja 6, H-7601 Pécs, Hungary, E-mail: jmajerj@netscape.net 2 Department of Biology, JJ Strossmayer University, Ljudevita Gaja 6, HR-31000 Osijek, Croatia E-maii:

stjepan@ffos.hr MAJER J., KRCMAR S.: Geographical distribution of Tabanids (Diptera: Tabanidae) of the Drava river along the Somogy County (Hungary), the Koprivniĉko-krizevaĉka and one part Viroviticko-podravska County (Croatia). Abstract: The faunistic research of Tabanids along the Somogy County both in the Hungarian and Croatian side of the Drava river resulted in the recording of 42 Tabánid species of which Atylotus flavoguttatus (Szilády, 1915), Hybomitra distinguenda (Verrall, 1909), Heptatoma pellucens (Fabricius, 1776) and Haematopota italica Meigen, 1804 were new for the study area, Keywords: Wetland, UTM map, new species. Introduction The mid and lower course of the river Drava (305 km) it is located between Hungarian and Croatian state borders and form great valleys with large floodplains. However, the beginning of the 19 century large parts of the wetlands in the Drava valley have been excluded from the floods by dykes except the parts of the river along the Somogy county. The anthropogenic impact has changed both the water regime of the river and the groundwater flow. Nevertheless, in comparison to other European river valleys, the ecological situation is still good. Despite the fact that the flood areas on Hungarian and Croatian sections of river Drava are home to wading birds, fish and a multitude of insects, there are relatively little data about its Diptera fauna. Among the Diptera from the point of view of medical and veterinary entomology the most important species belong to horse flies (Tabanidae) and mosquitoes (Culicidae), which are frequently vectors of various disease agents (KRINSKY, 1976; CARN, 1996; VAZZEILLE-FALCOZ et al. 1997; THOMSON & CONOR, 2000). The Tabanidae are considered to be among the major diptera pests of man and animals worldwide, but this group is undoubtedly the last studied (FOIL, 1989). Due to this lack of data, faunistic and ecological studies were initiated to contribute to the knowledge of biodiversity of the insect fauna along Hungarian and Croatian sections of river Drava. Material and methods The common faunistical and ecological research of Tabanids along Hungarian and Croatian sections of river Drava were carried out. The river has remained in natural or semi natural condition (as meandering freely) in along the Somogy County (Hungary), and along the Koprivniĉko-krizevaĉka and one part Viroviticko-podravska County (Croatia). The horse flies were collected on several localities in Hungary and in Croatia along the wetland areas and the oxbows belonging to the Drava River.