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Preparation and storage of fish samples for flow cytometry
Halačka, Karel ; Vetešník, Lukáš ; Mareš, J.
Flow cytometry enabling rapid measurement of cellular DNA content has been widely used in ichthyology and fishery practice. The aim of the methodology is to contribute to optimization of work on the flow cytometer by helping with the selection, sampling and possibilities of fixation of analyzed tissue and interpretation of obtained data. The target group are people from fishery companies and ichthyologists dealing with the problem of the fish population structure in free water. During the sampling and analyzing of samples problem can be limited availability of fixative and techniques as well as analyzes of material not originally retained for the purpose of ploidy determination. Typical examples are temporary usable or archive preparations, museum material, etc. For the verification were preferred representatives of polyploid complexes or economically exploited species with a known existence of polyploid individuals.
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Three years long investigation of fishpond Dehtář - first fishpond in the NETLAKE COST action project
Potužák, Jan ; Šumberová, Kateřina ; Fránková, Markéta ; Fabšičová, Martina ; Ducháček, M. ; Císař, K. ; Duras, J.
In 2014–2016 we monitored basic environmental parameters in the fishpond Dehtář near České Budějovice (Czech Republic) using system of sensors. Among other parametres we studied for instance water chemistry and phyto- and zooplankton community biomass, and species composition. Thank to the method used we recorded strong fluctuations in some of the environmental parameters, parrticularly in oxygen concentrations. Thank to the integration of the auomatic high frequency monitoring using the sensor system along with traditional research methods we were able to interpret the marked ecosystem changes. Several factors participated in the several days long oxygen depletion: warm and calm weather, later interchanged by cold front accompanied with mixing of water column and cloudy sky, fish farming management (high amount of nutrients related to manuring) and changes in biomass of phytoplancton (fast decomposition of high biomass amount of cyanobacteria). Our results enable to prevent similar situations in future, by e.g. lowering of nutrient input.
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Analysis of export opportunies for company Klatovské rybářství, a.s.
Hofman, Jiří ; Müller, Štěpán (advisor) ; Mrkvičková, Alena (referee)
The aim of this thesis is to analyze export opportunities for company Klatovské rybářství, a.s. in selected countries (Germany, Austria, Poland, Slovakia). The first chapter provides basic information about history of fish farming and fishing in Bohemia, Czech fish producers and company Klatovské rybářství. The second chapter gives a view on the world fish trade, the fish consumption in selected countries and activities of Klatovské rybářství on domestic and foreign markets. The third chapter contains SWOT analysis of company Klatovské rybářství, a.s. The last chapter gives an outlook to export opportunities in selected countries.
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The design of the multipurpose small water reservoir
Šejnoha, Petr ; Menšík, Pavel (referee) ; Doležal, Petr (advisor)
The bachelor thesis deals with the simplified design of a small water reservoir in selected place near the village of Kadov. If serves to improve the countryside, fish farming and recreation. Part of the thesis is a discussion about the type and function of a small water reservoir and its water management solution. The design of the damis evaluated. A water balance is drawn up for the particular considered profile of the dam, which evaluates the specific drainage from the river basins, the evaporation and the leakage of water by the body of the simplified designed dam. This gives rise to a basis idea of the possibility of handling water in the tank. Terminology is based on the valid ČSN (Czech State Standart) and TNV (Technical standart water management). The current state of the countryside and the requirements of the Mayor were taken into account.
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The Legal Regulation of Fishery
Lubovský, Zbyněk ; Damohorský, Milan (advisor) ; Müllerová, Hana (referee) ; Stejskal, Vojtěch (referee)
IN THE ENGLISH LANGUAGE The subject of my doctoral dissertation is an exploration of fishing rights as a collection of a wide range of legal norms regulating the behavior of the recipients only in the performance of fishing, but also in civil, administrative and criminal relations with the breeding and hunting fish related. Due to the current lack of scientific literature on this topic, the thesis also basic definition and status of the Czech Fishing rights in the legal system of the Czech Republic and important connections not only in relation to the institutions of environmental law, but also of civil and criminal law. Basic Institutes of fishing rights are always described as in historical context, as from the time of its inception developed, as well as in international comparisons of countries that their cultures are very close to us.
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Village Pátek during 20th century
Kolbaba, Lukáš ; Dvořáková, Michaela (advisor) ; Dvořáková, Markéta (referee)
This bachelor thesis deals the village Pátek during the history. The main part of thesis is 19th and especially 20th century. Are important events that had a major impact on the lives of citizens. The beginning is describes several events from earlier period, which significantly changed the character of village. In the century are then collected separately and described some important points in the village, consisting primarily of buildings (mills, school) or economic sectors (fish farming), which at that time played an important role, whether cultural or business, the lives of the villagers. The focus works are the memorial books and chronicles, to a lesser extent, the recorders of the meeting of the National Committee. To complement and improve some information was also used in the memories of several witnesses.
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Current possibilities of breeding and production of whitefish in the Czech Republic
MRÁZ, Luděk
The main goals of this thesis are description of a quite complicated peled breeding topic in the Czech Republic, evaluation of inconsistent taxonomical data, biology and ecology of the Coregonus maraena and Coregonus peled. The approach to peled breeding is in detail evaluated recently as well as in the past. Methods of breeding, fishing out, fish tank breeding and fish transfer are addressed. The questionary survey among peled producers was used for critical evaluation of their experience. The factors that discourage producers from peled breeding (eutrophication, predation by cormorants or otter as well as technological difficulties) were stated. Due to these factors the peled production is limited despite the stabile market demand. The case study of peled production was realized. In the condition of huge fish stock (carp and grass carp) the main negative impacts were confirmed.
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Factors influencing the ecological stability of the Novozamecky rybnik Reserve
Hanzelka, Jan ; Reif, Jiří (referee) ; Čihař, Martin (advisor)
Fishponds and their surroundings are affected by many factors disrupting their ecological stability. In this thesis, influences of selected factors are evaluated. Particularly it is discussed excessive overgrowing of shoreline by plants, pond siltation by allochthonous material from catchment area, eutrophication process and intensive fish farming. It is presented the impact of these factors on local avifauna in Novozámecký fishpond National Nature Reserve and Special Protection Area and compared with Třeboňsko Special Protection Area. Birds use the ponds especially as nesting habitat and food source. Therefore, it is necessary to describe the influences disrupting this habitat. The frugal interference with mentioned processes is needed in terms of dynamics of the ecological stability. Thereby the requested fishpond parameters and ecological and economic values will be maintained. Fisheries management and lack of historical management in the form of reasonably performing mowing and grazing in the vicinity of the ponds has the greatest impact on the habitat of birds upon Třeboň fishponds. Novozámecký pond also suffers from the lack of historical management, but the unsatisfactory state of the pond is rather due to the overall eutrophication of the environment.
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Influence of fishpond and agricultural management on the character of outflowing water from the model catchment of Hamerský stream
VLKOVÁ, Dana
The aim of this bachelor thesis was to find out the differences in chemical and physical parameters of water samples from the Hamerský grook. These samples were taken during the year 2015 from forest, agricultural and fish farming landscape. Measured parameters were: conductance, pH; KNK4,5; NO3-N; PO4-P ; N; organic C and other insoluble substances. Based on the results of samples from forest landscape the lowest values of pH; KNK4,5 and insoluble substances. The highest values of NO3-N were determined in results from agriculture landscape. The maximal values of the most measured parameters were detected at sample collection site "under the Ratmírov lake", especially insoluble substances.
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Small tanks in the cultural landscape
Királ, Martin ; Roubcová, Radka (referee) ; Milerski, Rudolf (advisor)
This bachelor thesis is mainly focused on preliminary design of a pond and it is divided into theoretical and practical part. The teoretical part is divided into three main chapters. First chapter deals with water, which is an important aspect of the life on the Earth, and its realationship to a landscape. The second chapter examines small water reservoirs, their functions, technical solutions and reconstruction of existing water reservoirs. The last theoretical part concetrates on ponds in Czech Republic and history of fish farming. The practical part includes preliminary design of the pond in Zbýšov in the district Brno-venkov, its hydrotechnical analysis and calculations, engineering report and photographs of the location.
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