National Repository of Grey Literature 61 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
Report from the demonstration catches on the water area Bagr in the area of the public forest park Stromovka in 2022.
Blabolil, Petr ; Dvořáková, M.
The report describes the results of measurements of basic water parameters and ichthyological catches in the pond Bagr.
Report on the distribution of the ichthyofauna under the natural lakes of Šumava.
Blabolil, Petr ; Hůda, J. ; Muška, Milan ; Draštík, Vladislav ; Holubová, Michaela ; Hladík, Milan ; Vrba, Jaroslav
The report describes the results of ichthyological surveys in the areas below the glacial lakes of Šumava.
Report from selected sites of the Hydrobiological Excursion in 2022.
Blabolil, Petr ; Bláha, M. ; Kajgrová, L. ; Kaštovský, J. ; Kolář, Vojtěch ; Vrba, Jaroslav
The report describes the results of sampling and determination of biological components (fish, zoobenthos, periphyton) in selected sites visited during the Hydrobiological Excursion.
Methodology for quantification of predatory fish species in reservoirs for optimization of aquatic ecosystem management.
Blabolil, Petr
The edited report summarizes the results of the National Agricultural Research Agency project.
Report on the structure of the ichthyofauna of the Černá River and U Kovárny pond in 2022.
Blabolil, Petr
The report summarizes the results of ichthyological surveys in the Černá river and the U Kovárny pond.
Fish stock monitoring in Kamenný fishpond in 2022.
Draštík, Vladislav ; Jůza, Tomáš ; Blabolil, Petr
The report summarizes the research result of stock assessment in Kamenný pond in 2022.
Ellimination of unwanted fish species from dam reservoirs - Possibilities, efficiency and economic evaluation.
Jůza, Tomáš ; Blabolil, Petr ; Čech, Martin ; Draštík, Vladislav ; Holubová, Michaela ; Hůda, J. ; Kočvara, Luboš ; Kolařík, Tomáš ; Muška, Milan ; Peterka, Jiří ; Prchalová, Marie ; Říha, Milan ; Sajdlová, Zuzana ; Tušer, Michal ; Vašek, Mojmír ; Vejřík, Lukáš ; Kubečka, Jan
spontaneous development of populations and the influence of human interventions. For situations where a certain part of the fish population needs to be caught, within the project 'Biomanipulation as a tool for improving the water quality of reservoirs', we tested the available approaches in terms of their effectiveness and difficulty. The target species of catches were mainly cyprinid fish (bream, bleak, roach, rudd, white bream), which feed mainly\non zooplankton and tend to form very large populations. Among the most effective methods of catch during spawning are catches using electrofishing boats and fyke nets. In the non-spawning period, it is possible to carry out mass catches using trawl nets. Catches are effective both before spawning (in April) and during the summer. However, with repeated catches in the same places, their effectiveness decreases as a result of the fish being spooked. The efficiency of the catches partially improves again if the catches are repeated with a break of approximately 1–2 weeks. Catches also vary according to the stocking density of a given water body. With effective catches, the cost of catching 1 kg of fish is in the range of CZK 15–50.
Complex survey of the fish stock of Karhov, Obecnice and Pilská Reservoirs in 2021.
Muška, Milan ; Blabolil, Petr ; Kočvara, Luboš ; Soukalová, Kateřina
The report describes the results of an complex survey of Karhov, Obecnice and Pilská Reservoirs fish assemblages and recommendations for their further management.
Final report from the mapping of the weatherfish (Misgurnus fossilis) in the NPP Žehuňský rybník and its surroundings.
Muška, Milan ; Blabolil, Petr ; Draštík, Vladislav ; Kolařík, Tomáš
The report evaluates the results of a survey focused on weatherfish in the NPP Žehuňský rybník and the surrounding area. During the survey, a large population of weatherfish was found in the tributary part of the pond and the adjacent pool. This finding is essential for future revitalization planning and also significantly expands current knowledge of species distribution. Based on the results of the survey, the local population is one of the most important in the Central Bohemian Region.

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