scholarly journals Distribution and recent status of freshwater mussels of family Unionidae (Bivalvia) in the Czech Republic

2019 ◽  
pp. 45 ◽  
Author(s):  
Luboš Beran
Keyword(s):  
Czech Republic ◽  
Anodonta Cygnea ◽  
The Czech Republic ◽  
Restricted Area ◽  
Water Abstraction ◽  
Allochthonous Species ◽  
Unio Tumidus ◽  
Fish Hosts ◽  
Unio Pictorum ◽  
Sinanodonta Woodiana

This study is devoted mainly to the distribution and its changes, inhabited and preferable habitats of bivalves from family Unionidae in the territory of the Czech Republic and the discussion of major threats and conservation measures. Altogether 6 autochthonous (Unio crassus, Unio pictorum, Unio tumidus, Anodonta anatina, Anodonta cygnea, Pseudanodonta complanata) and 1 allochthonous species (Sinanodonta woodiana) has been known in the Czech Republic. All these species occurred in all three river basins (Labe, Odra, Danube) and watersheds (North, Baltic and Black seas). A. anatina is the most widespread and common unionid while P. complanata is an autochthonous bivalve with the most restricted area of distribution. U. crassus has been a significantly disappearing species. As in most European countries, pollution and habitat loss including fragmentation and degradation, together with other factors such as water abstraction, invasive species and loss of fish hosts are the main threats affecting their populations.

scholarly journals Vodní měkkýši Malé Bečvy (Česká republika) [Aquatic molluscs of the Malá Bečva River (Czech Republic)]

2007 ◽  
Vol 6 ◽  
pp. 29-34 ◽  
Author(s):  
Luboš Beran
Keyword(s):  
Czech Republic ◽  
Endangered Species ◽  
Native Species ◽  
Potamopyrgus Antipodarum ◽  
Anodonta Cygnea ◽  
High Nutrient ◽  
Large Populations ◽  
Unio Tumidus ◽  
Sinanodonta Woodiana

This paper brings a review of a malacological survey of Malá Bečva River (Central Moravia, Czech Republic). Malá Bečva is a canal 18 km long and approximately 7 m wide, which runs from the Bečva River near Troubky and flows into the Mostěnka stream (influent to the Bečva River) in altitude 190 m. Aquatic molluscs sites were studied in 2007 at 9 sites. Altogether 23 species of aquatic molluscs (9 gastropods, 14 bivalves) were found. Except non-native species Potamopyrgus antipodarum, which is rare in Moravia, only the occurrence of common and widespread gastropods was documented, while research based on bivalves provided more interesting results. Large populations of three endangered species Unio crassus, Pisidium amnicum, and P. moitessierianum were documented. Population of Unio crassus was estimated at 5000-20000 individuals. This species and also Pisidium amnicum occurred only in the upper part of the Malá Bečva River from Troubky to Chropyně. Aquatic malacofauna of this part showed similarity with Strhanec Canal, which is canal of the Bečva River situated less than 10 km upstream of the Malá Bečva River. Bivalves Unio tumidus, Sinanodonta woodiana, Sphaerium rivicola, S. corneum and also Anodonta cygnea and Pseudanodonta complanata occur only downstream of Chropyně. This change of the malacofauna is probably caused by high nutrient tributary flows into the Malá Bečva River near Chropyně.

scholarly journals Vodní malakofauna dolního toku Lužnice se zaměřením na stav populace velevruba tupého (Unio crassus) [Aquatic molluscan fauna of the lower part of the Lužnice River (South Bohemia, Czech Republic) with focus on the population of Unio crassus]

2012 ◽  
Vol 11 ◽  
pp. 13-21
Author(s):  
Luboš Beran
Keyword(s):  
Czech Republic ◽  
Native Species ◽  
The Other ◽  
The Czech Republic ◽  
Other Hand ◽  
Molluscan Fauna ◽  
Physella Acuta ◽  
South Bohemia ◽  
Sinanodonta Woodiana

This paper presents results of a malacological survey of the Lužnice River in ca 70 km long stretch between the inflow of its main tributary the Nežárka River in Veselí nad Lužnicí and its confluence with the Vltava River in Southern Bohemia (Czech Republic). Thirty-one species of aquatic molluscs (19 gastropods, 12 bivalves) representing 40% of freshwater molluscan fauna of the Czech Republic were found at 15 sites. Differences of molluscan assemblages upstream and downstream of Tábor town were probably caused by different characters of the watercourse. The occurrence of rare bivalve Pseudanodonta complanata was confirmed. On the other hand, two non-native species Physella acuta and Sinanodonta woodiana were recorded. The research was preferentially focused on the population of the endangered bivalve Unio crassus. Its occurrence was confirmed at 8 from 15 sites under study but altogether only 31 individuals were found. Less than four specimens were found at particular sites but one.

scholarly journals First report of metacercariae of Cyathocotyle prussica parasitising a fish host in the Czech Republic, Central Europe

2016 ◽  
Vol 53 (3) ◽  
pp. 257-261 ◽  
Author(s):  
Y. Kvach ◽  
M. Ondračková ◽  
P. Jurajda
Keyword(s):  
Czech Republic ◽  
Native Species ◽  
Fish Host ◽  
Danube Basin ◽  
Metazoan Parasites ◽  
The Czech Republic ◽  
Proterorhinus Semilunaris ◽  
Fish Hosts ◽  
First Time

Summary Examination of western tubenose goby (Proterorhinus semilunaris) from the River Dyje (Czech Republic, Danube basin) for metazoan parasites revealed the presence of metacercariae of Cyathocotyle prussica Mühling, 1896 (Digenea: Cyathocotylidae) in both muscle tissue and the peritoneal cavity. This is the first time that tubenose gobies have been reported as an intermediate host for C. prussica, and the first time that C. prussica metacercariae have been registered parasitising fish hosts in the Czech Republic. Here, we describe the morphology of metacercariae and five-day preadults, cultivated in vitro, and discuss the importance of recently established, non-native species as suitable hosts for this parasite.

scholarly journals Minimum Residual Flows for Catchments in the Czech Republic

Water ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 689
Author(s):  
Pavel Balvín ◽  
Adam Vizina ◽  
Magdalena Nesládková ◽  
Johanna Blöcher ◽  
Marcela Makovcová ◽  
...  
Keyword(s):  
Czech Republic ◽  
Methodological Approach ◽  
Current Approach ◽  
Data Sets ◽  
The Czech Republic ◽  
Water Abstraction ◽  
Current State ◽  
Minimum Residual ◽  
Residual Flows ◽  
The Government

The determination of minimum residual flow (MRF) follows diverse methodology in Europe due to differing hydrological conditions, ecosystem requirements, water abstraction requirements, and legislation. Methodologies in individual countries are difficult to compare qualitatively. However, individual approaches can serve as examples for countries undergoing the process of developing new methodologies, either for legislative purposes or to improve environmental standards on watercourses. This is exactly the situation in the Czech Republic which, has been working on the Regulation of the Government of the Czech Republic for ten years, since the amendment to the Water Act in 2010, defines the methods and criteria for determining the MRF on watercourses. T.G. Masaryk Water Research Institute, p.r.i., was commissioned to develop a new methodology to serve as the basis for the wording of aforementioned regulation. The new methodological approach took into account modern trends concerning the preservation of ecological standards, and used standard hydrological characteristics for its calculations. The newly proposed approach is undergoing a complicated approval process as the authors seek to increase the MRF compared to the current approach. The new approach assumes an MRF setting between Q97 and Q90. It defines four areas within the Czech Republic, by their hydrological and hydrogeological conditions, where the MRF is determined in different ways. This article describes the development of a new methodological approach, including the use the available Czech Hydrometeorological Institute data sets, the proposed regional division for MRF calculations, the determination the MRF below reservoirs, and the current state of the issue.

Social variation in size at birth and preterm delivery in the Czech Republic and Sweden, 1989-91

1998 ◽  
Vol 12 (1) ◽  
pp. 7-24 ◽  
Author(s):  
Koupilova ◽  
Vagero ◽  
Leon ◽  
Pikhart ◽  
Prikazsky ◽  
...  
Keyword(s):  
Czech Republic ◽  
Preterm Delivery ◽  
The Czech Republic ◽  
Social Variation ◽  
Size At Birth

On Geropsychology in the Czech Republic

GeroPsych ◽  
2012 ◽  
Vol 25 (3) ◽  
pp. 161-166
Author(s):  
Hana Stepankova ◽  
Eva Jarolimova ◽  
Eva Dragomirecka ◽  
Irena Sobotkova ◽  
Lenka Sulova ◽  
...  
Keyword(s):  
Czech Republic ◽  
Clinical Practice ◽  
Old Age ◽  
Cognitive Rehabilitation ◽  
The Czech Republic ◽  
Rehabilitation Research

This work provides an overview of psychology of aging and old age in the Czech Republic. Historical roots as well as recent activities are listed including clinical practice, cognitive rehabilitation, research, and the teaching of geropsychology.

Contemporary Psychology in the Czech Republic

2000 ◽  
Vol 5 (1) ◽  
pp. 62-65 ◽  
Author(s):  
Jiří Hoskovec ◽  
Josef M. Brožek
Keyword(s):  
Czech Republic ◽  
The Czech Republic
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