H. dr. Harmat Beáta (szerk.): A Bakonyi Természettudományi Múzeum Közleményei 22. (Zirc, 2005)

CSABAI ZOLTÁN – MÓRA ARNOLD – BODA PÁL – CSER BALÁZS – MÁLNÁS KRISTÓF: Contribution to the aquatic insect fauna of the northern part of the Bakony mountains (Ephemeroptera, Coleoptera, Heteroptera and Trichoptera)

Aquatic beetle fauna of Bakony Mountains are only known from some sporadic collecting data, like many other regions of Hungary. Majority of these data are unpublished yet. In the last several years the revision of aquatic beetle collection of the Bakony Natural History Museum (Zirc) and Hungarian Natural History Museum (Budapest) has finished, the publication of the results of review is in progress (CSABAI et al. 2005). Regarding Bakony Mountains, the majority of the papers furnished data from Lake Balaton and its environs. SZÉKESSY (1943) summarized data from the Tihany Peninsula, TÓTH (1968) published data from Balaton Uplands, TÓTH (1991) and MERKL (1996) gave all known data from Lake Balaton, WACHSMANN (1907) provided informations on the beetle fauna of Pápa and its surroundings. Altogether 98 species were known from this area. All these data came from collecting and trapping made in edge territories of Bakony, but inside the mountains there was no comprehensive survey concerning aquatic beetles. The aquatic and semiaquatic heteroptera fauna of Bakony is still almost completely unknown. There are extensive surveys on the terrestrial Heteroptera fauna of Bakony carried out by the staff of the Bakony Natural History Museum, but these works provided only a few occurence data of aquatic and semiaquatic taxa, chiefly regarding large sized, easily identifiable species (HARMAT 2001). The caddisfly fauna of the Bakony Mountains is well known. The first reports were published by ÚJHELYI (1979). Some data are known from the revision of the collection of the Hungarian Natural History Museum (NÓGRÁDI 1989). In the 1980s the first extensive investigations on the caddisfly fauna of the Bakony Mountains were carried out and 87 species were recorded from 52 sites (NÓGRÁDI and UHERKOVICH 1985). Further data are given from other sites in the area of Bakony by the same authors (UHERKOVICH and NÓGRÁDI 1988). Sporadic data can be found in the work on the caddisfly fauna of the Lake Balaton and its catchment area (NÓGRÁDI and UHERKOVICH 1994). Based on these results 100 caddisfly species are recorded from the Bakony Mountains, so the caddisfly fauna of this area is one of the best known in Hungary. Materials and methods In 2003 and 2004 we made faunistical survey in 51 sampling sites of north part of Bakony Mountains. The date of sampling considering the fenology of aquatic insects were in spring (25-27 April 2003, 12-13 and 25 May 2004), in summer (16-18 August 2003) and in early autumn (23-24 September 2004). In the course of appointing the collecting localities we intended to represent all main types of waterbodies of Bakony Mountains, like streams, pools, marshes, lakes and reservoirs. Below in the list a total of 51 sampling sites are given with their name, in brackets with their administrative units, the accurate geographical co-ordinates and the 10 x 10 km UTMgrid codes (Table 1, Figure 1).