Malacologica Bohemoslovaca
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Vodní měkkýši Sázavy a vybraných přítoků se zaměřením na
ohrožené a nepůvodní druhy
Aquatic molluscs of the Sázava River and its selected
tributaries with a focus on threatened and non-native species
Luboš Beran
This paper presents the results of a malacological survey of the
Sázava River and its tributaries conducted over the last 20
years. The Sázava River (Czech Republic, Central and Eastern
Bohemia) is one of the major tributaries of the Vltava River.
Altogether 45 species of aquatic molluscs were found at 221
sites located at the Sázava River and its tributaries. More than
60% of recorded species of the Sázava River and its tributaries
are common and widespread. The population of critically
endangered Margaritifera margaritifera in the Jankovský
potok is near extinction. Other threatened bivalves Pseudanodonta
complanata, Unio crassus and Sphaerium
rivicola were recorded in the Sázava River. Populations of
U. crassus were also found in several tributaries
(Blanice, Hejlovka, Martinický potok) while in the Sázavka Brook
and the Želivka River only a few individuals were found. Gyraulus
acronicus, a rare gastropod in the Czech Republic, was
recorded in the Blanice River and several dam reservoirs. Four
non-native species (Potamopyrgus antipodarum, Physa
acuta, Gyraulus parvus, Dreissena polymorpha)
were found in the monitored streams and reservoirs but usually
in a relatively small number of localities. Most of these were
located in the lower section of the Sázava River, Švihov dam
reservoir and some tributaries.Keywords: Mollusca, Sázava River, threatened species, faunistics
Beran L., 2020: Vodní měkkýši Sázavy a vybraných přítoků se zaměřením na ohrožené a nepůvodní druhy [Aquatic molluscs of the Sázava River and its selected tributaries with a focus on threatened and non-native species]. – Malacologica Bohemoslovaca, 19: 29–54. https://doi.org/10.5817/MaB2020-19-29
Publication date: 30. 3. 2020. PDF (35.8 MB)
Copyright © 2020 Published by Department of Botany and Zoology, Faculty of Science, Masaryk University
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