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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Shells morphology of pearl mussel (\kur{Margaritifera margaritifera})
 PŮBALOVÁ, Lenka
The aim of this study was to determine the differences of freshwater pearl mussels (Margaritifera margaritifera) originated from two geographically isolated areas according to morphological parameters and the age of dead freshwater pearl mussel Data were collected from four localities, i. e. from the two areas (Šumava: Blanice, Zlatý potok and Aš area: Bystřina and Rokytnice). The average length of shells was 95.8 mm, thickness 27.9 mm, height 43.4 mm. The ligament was eroded from 57 % and index (ration between thickness and length x 50) was on average 32 %. Thickness of the shells and the percentage of eroded ligament differed between the two areas. Both of these parameters were higher in Aš area. Other morphological parameters (length and height of the shells and the above mentioned index) were similar in both areas. Assessment of age according to the growth lines in the ligament was significantly higher than the evaluation using growth lines on the surface of the shells. Mean age of freshwater pearl mussels determined using growth lines in the ligament was 36 years old and on the surface of the shells was 30 years old. Age according to the growth lines in the ligament better correlated with the length of the shell than percentage of eroded ligament. Age of dead freshwater pearl mussel was comparable in both areas, however differed between localities. Rokytnice proved to be the most suitable habitat for freshwater pearl mussels according to the age estimation.
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Epizoa of crayfish
 PŮBALOVÁ, Lenka
The aim of my work was to evaluate quantitatively animals, which colonizes the surface of the noble crayfish (Astacus astacus). Epizoa was sampled using baths in magnesium chloride. This work was concentrate especially on the genus Branchiobdella. Data were collected from three sites. Two sites were in the Czech Republic and the third was sampling site in Austria. Two species of species occurred Branchiobdella (B. parasita and B. pentodonta) were found of the seven in Europe. Only B. parasita was found in the Czech Republic. B. parasita (88%) dominanted over B. pentodonta (12%) in Austria. Furthermore were Ciliata particularly Epistylis and Vorticella; Rotifera in the genus Keratella, Lecane and Branchionus; Acanthocyclops and Ostracoda and genus Plumatella were determined on the crayfish originated from Vodňany.
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See also: similar author names
4 PŮBALOVÁ, Ludmila
4 Půbalová, Ludmila
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