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Adjust the flow - design migration path
Špaček, Jakub ; Marková,, Jana (referee) ; Šlezingr, Miloslav (advisor)
This thesis describes the design of fish ladder on the river Mohelka near the village Chocnějovice. The first section describes the general characteristics of the river-basin and the selected section. It is written introduction to the design, construction and service of the fish ladder. For the task were developed two alternatives. These alternatives were described and compared each other. Included are the input and output data of the given structure modeling using HEC-RAS. The last part is then researched drawings to objects.
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The use of otoliths for growth and population dynamics studies of Percidae and Cyprinidae in Most water reservoir
Tůmová, Eliška ; Frouzová, Jaroslava (advisor) ; Pivnička, Karel (referee)
This Master thesis compares growth of Percidae and Cyprinidae in flooded mining pit Most with water reservoir Vír, which is stable, fifty years old. Fish were cought using toils by workers from Hydrobiology institute, Academy of Sciences, Czech Republic, which are exploring fish stock. Otoliths, scales, and operculas from both families, Cyrinidae and Percidae, were removed from fish for age determination and growth back-calculation in individual years. Due to surplus of nutrients and food in flooding mining pit is assumed a huge growth difference in the first two years of life. The aim of this thesis is not only to describe the difference in the expected growth of individual species, but also to estimate its causes. At the same time will be in a very contrasting conditions compared different methods of age determination. Key words: otolith, fish age, fish population, fish growth, water reservoir, flooded mining pit, growth back-calculations
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The use of otoliths for growth and population dynamics studies of Percidae and Cyprinidae in Most water reservoir
Tůmová, Eliška ; Frouzová, Jaroslava (advisor) ; Pivnička, Karel (referee)
This Master thesis compares growth of Percidae and Cyprinidae in flooded mining pit Most with water reservoir Vír, which is stable, fifty years old. Fish were cought using toils by workers from Hydrobiology institute, Academy of Sciences, Czech Republic, which are exploring fish stock. Otoliths, scales, and operculas from both families, Cyrinidae and Percidae, were removed from fish for age determination and growth back-calculation in individual years. Due to surplus of nutrients and food in flooding mining pit is assumed a huge growth difference in the first two years of life. The aim of this thesis is not only to describe the difference in the expected growth of individual species, but also to estimate its causes. At the same time will be in a very contrasting conditions compared different methods of age determination. Key words: otolith, fish age, fish population, fish growth, water reservoir, flooded mining pit, growth back-calculations
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The usage of fish otholits for environmental studies
Tůmová, Eliška ; Frouzová, Jaroslava (advisor) ; Slavík, Ondřej (referee)
Otoliths are small, white minerals mostly composed of calcium carbonate. They are located in inner ear of fishes and provide balance and hearing. To the biologist, the otoliths are one of the most important structure for understanding the annual age, where and in which conditions the fish was living, and even what was its diet. This paper is focused on summarizing and ordering the use of otoliths, what methods do we use and possibilities of applications in environmental studies. Key words: otolith, fish age, fish population, chemistry otoliths, microstructure of otoliths, chemistry otoliths, fish growth
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Adjust the flow - design migration path
Špaček, Jakub ; Marková,, Jana (referee) ; Šlezingr, Miloslav (advisor)
This thesis describes the design of fish ladder on the river Mohelka near the village Chocnějovice. The first section describes the general characteristics of the river-basin and the selected section. It is written introduction to the design, construction and service of the fish ladder. For the task were developed two alternatives. These alternatives were described and compared each other. Included are the input and output data of the given structure modeling using HEC-RAS. The last part is then researched drawings to objects.
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Biodiversity of fish in selected inflows of water reservoir Lipno 1
SALON, František
Monitoring of fish populations was performed in the localities having normal natural pattern with minimum ratio of and violation by anthropogenic activity. Monitoring took place in 2009-2010 in two localities, the Pestřice Brook and the Hamerský Brook. Electrofishing was used for the actual mapping of fish populations and selected flows. Fishing took place upstream, within the whole width of the stream and the length of the section reached approximately 100 m. Caught fish and lamprey species were determined, their length was identified by means of a measurement board and, after documentation, they were carefully returned back to the stream. The assessed data provide basic information about the species structure of fish population and its nature, development of diversity and equitability, species abundance, dominance and size variability etc. The mostly fished species Salmo trutta m. fario, Perca fluviatilis and protected and threatened species Lampetra plameri, Cottus gobio, Lota lota, Phoxinus phoxinus.
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