Tóth Sándor: A Bakony természettudományi kutatásának eredményei 29. - A Bakonyvidék és a Balaton-medence szitakötő-faunája (Insecta, Odonata) (Zirc, 2005)
The dragonly fauna of the Bakony region and the Balaton Basin - (Insecta: Odonata)
The dragonfly fauna of the Bakony region and the Balaton Basin (Insecta: Odonata) This paper gives the results achieved in the research of the dragonfly fauna of the Bakony region and the Balaton Basin. Occasional dragonfly collections have already made since the late 19 th century. The results were mostly published in home publications. The first data on dragonflies were recorded by Rezső Kohaut (KOHAUT 1896): "The Natural History of Hungarian Dragonfly Species" wich contains 29 species from the Bakony region and Lake Balaton, particularly from the localities in the environs of Pápa, Pannonhalma and Balatonöszöd. Excepting a few these data were repeated in later publications. Even in Sándor Újhelyi's work (ÚJHELYI 1955) analysing the material owned by the Museum of Natural History - the number of the dragonfly species in the area grew only to 35. Around the 1950s - as part of the more intensive entomological research - the dragonfly collection data kept growing, however, the number of species observed in this area did not significantly grow considering the growth of the data. Concerning the research of the dragonfly fauna of the Bakony region, the research of Pál Benedek performed between Tapolcafő and Pápa, particularly along the Tapolca-brook, is worth mentioning (BENEDEK 1961, 1965). He recorded 38 dragonfly species in this relatively small area. From the second half of the 1960s onwards the research of the dragonfly fauna of the Bakony region and - partly - the Balaton Basin took place within the programme called "The Nature Landscape of the Bakony Mountains". The partial results of the former dragonfly collections were published in several papers (CSIBY 1981, TÓTH 1973, 1980, 1981, 1985b, 1990a, 1990b, 1996, 2000, 2001a). The present volume is based on the material collected in nearly two decades. It may be considered as a faunistical foundation, therefore, consequent's it does not contain descriptions of the dragonflies nor their identification characters and no reference is made to identification keys used in determining the taxa. In the introduction the author gives a short outline of the dragonfly fauna research of the area from the late 1800s to our days. He gives a sketchy description of the life history, conditions of occurrences and nature conservation significance of dragonflies. The chapter "Materials and Methods" also gives a short description of the most important collecting techniques as well as the basic of collecting techniques. He emphasises the increased significance of the collection and the rearing of larvae and the exuvium-collection in research of dragonflies. There is a detailed overview of the major results of the research. It is pointed out that the research area and particularly the Bakony region are relatively well explored from the aspect of dragonflies. This is supported by the 58 recorded species, the occurrence of numerous elements valuable from the aspect of nature conservation and the high number of locality data - currently reaching 800. The degree of research can be seen on the UTMmaps of the species (broken down to 2.5x2.5 km squares). As far as the number of species is concerned, no significant difference may be observed in the fauna of the two macroregions (Bakony region 57, Balaton Basin 54 species). Out of the 23 Hungarian protected species 18 occur in the material. Owing to the presence of dragonflies, the area represents an outstanding natural value. Its significance is enhanced by the fact that the list contains five strictly protected species (Aeshna viridis, Gomphus flavipes, Leucorrhinia caudalis, Leucorrhinia pectoralis, Ophiogomphus cecilia) - with an ideal value
