Dr. Fűköh Levente szerk.: Malakológiai Tájékoztató 12. (Eger, 1993.)

SZABÓ, S.: The effect of becoming waterless and experiments of livingplace reconstraction on Monusca living in the soid laces of Upper Kiskunság

Field work I went to the collecting places of territory number H once a fortnight, and to territory number HI. once a fortnight, and to territory number III. once a month. I worked with waternet and a quadrat 50x50 cm dividing 25. The layer research of the dried beds was done with a two cubedecimeter piston-drilling. In the open deep water I collected from boat. I applied faunaprospecting, selecting collection and coenological collection to help ^the analysis of quantitative relations on both territories. I wrote down the oecological potentialities of the living-place; and I performed the necessary waterchemical researches with the help of VISOCOLOR test. Laboratorial work I selected, decided and systematiced the collected material in my laboratory. I selected the mollusca from the drill-samples by 5 centimetres slices sluicing. In case of characteristic species by experiments made in aquarium. Lack of suitable laboratorial equipments I applied the approaching method, the Haarlow-index (Balogh, J. 1953) as measuring of snailbiomassa. The Haarlow-index means: the volume of animal multiplied abundancia. In case of Lymnaea I used conical shape as volume, while in case of Planorbidae it was disc and in case of Acroloxus lacustris it was pyramid. I was able to check this in case of big species by pouring gypsum into the empty shields and after that I measured the watervolume displaced by the shield in a measuring-tube. The difference between the approaching volume measurement and the cheking was negligible. Results There is not enough data about Mollusca from the examined territories. Based on literary data Soós had done collection first at Fülöpszállás on his exploratory expedition between 1909 and 1911 (Soós, L. 1915). After establish of National Park "Kiskunsági" - KNP in the next - Richnovszky, A. did studies in the sodic lakes of territory number III. (Richnovszky, A. 1978). We have got data from territory of Apajpuszta based on mapwork of recens mollusca spreading (Pintér, L. et allii, 1979). In the earlier period I myself have performed discovery work (Szabó, S. 1980, 1982, 1986, 1990a,b, 1992 a,b) Analysis of the specieslist 16 species have written down up to now from territory Fülöpszállás and Szabadszállás. Richnovszky described 9 species from "Kelemenszék" in 1977. Im the beginning of the experiment there were 3 species in the "Fehérszék" but now there are 11. There are 6 species in the "Kelemenszék" in the "Zabszék" and there is only one species in the Pipásszék". In territory of Apaj there are 16 recens species in contradictio to the published literature, which said there were only 4 species. In the drill-samples I have found pieces of death Iandsnails (Chondrula tridens, Vallonia pulchella), and the water - Valvala pulchella is know only from drilling in this territory. In the neighbouring lake "Háromszögi" - which belongs to Kunszentmiklós - there are 10 species and in the "Pozsáros" there are 7 species.