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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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Fish breeding - Design of education program for primary school
NĚMEC, Libor
The aim of the bachelor's thesis was to create and implement a teaching program for the 2nd level of primary school. The program is called Fish Breeding or Fishing Afternoon in Lásenice. The program could be used in the subject of natural history. Literary research contains the history of pond farming in our territory, it deals with ponds and their parts and the main species of fish farmed. The next part of the work is a description of the development and implementation of the curriculum. Part of the work is the evaluation of knowledge gained during the program.
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Integrovaná ochrana rostlin v akvaponických systémech
URBÁSEK, Jan
The aim of this bachelor thesis was to develop a literature search focused on the issue of integrated pest management (IPM) in aquaponics. Due to the fact that the literature focused on IPM in aquaponics is very limited, the work is based primarily on information about plant protection used in greenhouses or hydroponics. Individual methods of plant protection were evaluated based on their applicability in various types of aquaponic systems. The evaluation also considered their real usage in commercial aquaponic farming. Prevention is proving to be the most effective. By following strict preventive measures, more significant problems can be prevented. Subsequent resolution of the problems can be quite complicated and can cause irreversible economic losses on plant products. Chemical protection is now commonly used in plant protection in greenhouses and hydroponics. However, the application of chemical pesticides in aquaponics is highly problematic due to their possible toxicity to aquatic organisms. Due to the limited possibilities of using traditional chemical pesticides, it is therefore necessary to look for other alternatives. Natural products based on plant extracts could become one of these alternatives. There is a large number of plants that have pesticidal effect, but the possibility of their application is without further research very limited, as most products of plant origin have not been tested for their toxicity to aquatic organisms. In this work has been created an overview of plant products available on the market that could be used against problematic pests and diseases. Also based on literature sources there has been created a list of plants that can be recommended for future research into usability and inclusion in the IPM system of large aquaponic farms.
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Hobby akvaponie
VONDRUŠKA, Vojtěch
The aim of this bachelor thesis was analysing hobby aquaponics systems available on the market and then designing, assembling and testing own aquaponics hobby system which can be used on balconies, terraces and gardens. Five different media beds and one combination of media bed and raft system were selected and evaluated. From the identified shortcoming of systems on the market were designed, assembled and tested in practice two media beds aquaponics systems. These systems were evaluated and compared with systems available on the market.
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Makrofyta v rybnících s různým typem rybářského hospodaření
FRANCOVÁ, Kateřina
Artificial fishponds have been an integral part of the European landscape for centuries. In addition to fish production, they provide important ecosystem services and habitats for biota, including macrophytes. The processes influencing macrophyte assemblages in fishponds are poorly understood and thus they were in the focus of this research. The opening study introduces thesis with a review of available information of historical development of fishponds and relation between fish farm management practices and fishpond macrophyte assemblages. Relevant socio-economic factors and possible effects of climate change are also explored. Comparison with similar wetland habitats shows that fishponds represent valuable systems harbouring many macrophyte species and a range of their rare and threatened taxa. The following study focuses on seasonal and inter-annual differences in vegetation in open water zones of nursery and main fishponds. The results show significant effect of the fishpond use type on macrophyte assemblages with strong decrease in macrophyte species numbers and abundance with increasing fish stock pressure. Stands of aquatic macrophytes commonly more developed in the nursery ponds in the spring of the first year of the production cycle, but variability could be found between ponds for example due to lower water level. While the results showed distinctions in water chemistry, sediment thickness, and adjoining land use, only transparency exerted a significant effect on macrophyte assemblages. Differences in other measured parameters were probably too small to be reflected in macrophyte species composition. Additionally, most macrophytes in our dataset show a broad ecological range. The last part of thesis reports analyses of plant species of reed bed and exposed bottom zones in the same selection of fishponds. As observed in the study of the open water zone, the highest species numbers and abundance were observed in the nursery ponds. The plants of reed beds were mostly affected by the width of the zone and shore slope. Lower slope in most fishponds often allowed development of the dense stands of Phragmites australis, which are highly competitive. They affect light and nutrient availability, produce a high amount of litter and so limit occurrence of other species. This as well as a position in the upper part of littoral, where they might not be affected by fish or water level disturbances so often, led to similarities in reed bed zones between fishpond types. In contrast more open reed bed stands with species such as Typha angustifolia and exposed bottoms allowed development of more species. The plants of exposed bottoms were affected by fishpond use type and adjoining land use type. The reason is lower fish stock pressure and more regular summer and/or winter drainage. Some fishponds or their parts did not have reed beds and exposed bottoms were then directly connected and influenced by surrounding landscape, e.g. ruderal and grassland species such as Barbarea vulgaris and Taraxacum sect. Ruderalia regularly occurred there. Application of fish farming practices is important not only as it is a part of the national heritage, but also to avoid pond terrestrialization. However, modification of farming techniques to best suit individual pond conditions and to adapt to climate change is recommended. Reducing fish stock density when relevant and limiting nutrient input from manuring and supplemental fish feeding may aid recovery of fishpond ecosystems including macrophyte species assemblages.
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Factors influencing the ecological stability of the Novozamecky rybnik Reserve
Hanzelka, Jan ; Čihař, Martin (advisor) ; Reif, Jiří (referee)
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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Chov jesetera malého (Acipenser ruthenus) v České republice
Rybnikár, Juraj
This dissertation provides an overview of the status of critically endangered sterlet in the Czech Republic and in other countries located in the Danube river basin. Results of own research of artificial breeding at experimental and farm conditions are presented. In the results section, focus was placed on most problematic part of artificial reproduction, development, growth and offspring rearing of sterlet in technological aquaculture. The specific objective pursued by the sterlet were: method of non-invasive detection of gas in the digestive tract by radiologic imaging, the effect of different environmental conditions for the presence of gas in the digestive tract and assessment of broodstock for spawning, followed by offspring rearing.
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