National Repository of Grey Literature 17 records found  1 - 10next  jump to record: Search took 0.01 seconds. 
Ichtyological survey of the Lipno reservoir in 2021.
Soukalová, Kateřina ; Kubečka, Jan ; Jůza, Tomáš ; Kočvara, Luboš ; Sajdlová, Zuzana ; Souza, Allan T. ; Kolařík, Tomáš
The report describes the evaluation of the development of fish communities and their quantity in the Lipno reservoir in 2021.
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.
Optimalizace využití RFID technologie pro detekci značených ryb ve sladkovodním prostředí
KOLAŘÍK, Tomáš
The RFID technology has a potential to become widely used technology with various usage in Czech waters, and one of the major applications is monitoring of freshwater fish migrations. This thesis summarizes and expands the newest knowledge in the field of using suitable materials for antenna construction for passive telemetry. The thesis explores the possibilities of antenna shapes necessary for correct technology function. The findings on functionality, reliability, detection distances and limits of the technology were experimentally tested not only in the laboratory conditions but were also evaluated in the field conditions during the monitoring campaign of the fish migration in European protected area Želivka. The thesis addresses the question whether it is possible to use RFID technology for small, medium and large natural streams or in man-made constructions in the streams such as power plants, weirs or fish passages.
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.
Ichtyological survey of the Lipno reservoir in 2020.
Soukalová, Kateřina ; Kubečka, Jan ; Jůza, Tomáš ; Kočvara, Luboš ; Sajdlová, Zuzana ; Souza, Allan T. ; Kolařík, Tomáš
The report describes the results of an ichthyological survey of Lipno Reservoir and recommendations for further management.
Management and support of selected cyprinid rheophilic stocks in open waters.
Blabolil, Petr ; Holubová, Michaela ; Kolařík, Tomáš ; Šmejkal, Marek
Methodology summarizes recent approaches to effectively manage rheophilic fish population in rivers.
Results of extended research of the ichthyofauna of lakes Laka and Čertovo, including adjacent streams.
Blabolil, Petr ; Hlaváč, J. ; Hůda, J. ; Kolařík, Tomáš ; Kortan, D. ; Muška, Milan ; Peterka, Jiří ; Vrba, Jaroslav
The report describes the results of an ichthyofauna survey in two areas of the Šumava National Park, where catches were made by an electric generator in the spring of 2021. This is the first direct evidence of natural reproduction of brown trout in the parts previously heavily affected by acidification.
Report from demonstration catches of water areas of the public forest park Stromovka in 2021.
Blabolil, Petr ; Jůza, Tomáš ; Kaštovský, J. ; Juráň, J. ; Kočvara, Luboš ; Kolařík, Tomáš
The report describes the results of catching fish by a fry seine during the day in the pond Bagr and by an electric generator together with traps in a pond in the southern part of the Stromovka public forest park.
Survey of European catfish population in Žlutice Reservoir in 2019
Vejřík, Lukáš ; Sajdlová, Zuzana ; Bartoň, Daniel ; Kolařik, Tomáš ; Čech, Martin
The report summarizes the results of monitoring the abundance, size structure, behavior and feeding of catfish food in the Žlutice Resevoir. It also contains conclusions and recommendations for the management.

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6 KOLAŘÍK, Tomáš
6 Kolarík, Tomáš
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