Cladocera studies in Lake Balaton. II. Littoral Cladocera from the northeastern shores of the Tihany peninsula

Sebestyén, Olga (1948) Cladocera studies in Lake Balaton. II. Littoral Cladocera from the northeastern shores of the Tihany peninsula. A Magyar Tudományos Akadémia Tihanyi Biológiai Kutatóintézetének évkönyve, 18. pp. 101-116. ISSN 0365-3005

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Abstract

Distributions of Cladocera were studied in relation to environmental conditions in various localities of the NE shores of the Tihany peninsula, Lake Balaton, Oct. 1944-Dec. 1947. The 24 species found (Sididae 1, Daphnidae 5, Macrothricidae 3, Chydoridae 15) may be grouped on ecological grounds as follows: 1. eupelagic (only resting stages recorded); 2. littoral (“eucoen” forms some inclined to be eurytop); 3. mud-living forms from the open water (eurytop, “coenophil” and “coenoxen”); 4. at home in the littoral as well as in the mud of open water (eurytop forms with wider distribution than thq ones belonging to the previously mentioned groups). Two littoral species seem to prefer certain plant species (Sida- Potomogeton per foliatus and Acroperus - Myriophyllum spicatum). 13 cases males were recorded, for 11 sp. only parthenogenetic females noted. All the species found seem to be warm stenothermous, though with different range of temperature. Emergent vegetation dividing marshy territories (with almost entirely submersed vegetation) from the main water seems to influence the effectuation of wave-actions, acting as screen for both “biotop” and “biocoenosis” of the marginal water. The “work” of the screen is determined by the dimensions of the growth.

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