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Results of Chabařovice lake fish community survey in 2013
Peterka, Jiří
The report summarizes results of complex ichthyological survey of lake Milada (former opencast mine Chabařovice) in 2013, and suggests recommendations for further monitoring. The objective of the survey was the documentation of fish community current state and succession, evaluation of possible future risks and lake management recommendations.
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Complex survey of fish community of Most lake in 2011
Peterka, Jiří ; Kubečka, Jan
The report summarizes results of complex ichthyological survey of lake Most (former opencast mine Ležáky-Most) in 2011, and suggests recommendations for further monitoring. The objective of the survey was the documentation of fish community current state and succession, evaluation of possible future risks and lake management recommendations.
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Analysis of nutrients concentrations in waters and their transport from selected catchment
JIRKOVSKÁ, Veronika
The aim of this study was to analyze the presence of the trend of long-term time series of concentrations and losses of nutrients and their descriptions. The concentrations of nitrogen and phosphorus compounds were evaluated. The analysis was performed on selected catchment of large, medium and small areas. All observed catchment are located in the basin of dam Švihov. Trends were tested using non parametric methods - Mann-Kendall test, Seasonal Mann-Kendall test and Kendall's correlation coefficient . In this study there are generally described monitored cycles of nutrients, nitrogen and phosphorous. There are also characterized the factors, which effect leaching of these nutrients to water (from the catchment). The paper also outlines the progression of water quality in the Czech Republic, which was influenced by political and economic changes in Europe in the second half of the 20th century.
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Comparison of long term values of discharges and concentrations of selected substances in pasture area of Jenín
KAŇOKOVÁ, Markéta
The aim of this thesis is to evaluate the flow rate in pasture-way cultivated catchment area of Jenin stream and concentrations of nitrates and phosphorus in the stream during the period of 2004 - 2012. For this purpose individual time series of the flow-rate values and concentrations of selected substances were processed. The catchment was divided in two subcatchment areas labeled J1 and J2. The results were compared with the previous ones from the period 1983 - 1985 while the area was used as an arable land .
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Monitoring of 0+ juvenile fish communities in selected Moravian rivers
GEBAUER, Radek
Monitoring of 0+ juvenile fish communities was realized in years 2012 and 2013 in 39 localities in 25 selected Moravian rivers. It was realized in collaboration with Povodí Moravy SOE research workers. The aim of this diploma thesis was to conduct a survey of 0+ juvenile fish communities and evaluate basic attributes of these ichthyocenosis (species richness, biodiversity, equitability, abundance and domiance). Secondary aim was the evalutation od hydromorphological conditions and water quality based on data provided by Povodí Moravy SOE. This monitoring was realized using the mobile FEG 1500 electrofishing device. The electrofishing crew moved upstream using continuous fishing strategy. Each locality was selected by highly experienced research workers of Povodí Moravy SOE. Caught fish were determined immediately and carefully retruned to the stream. In total there was present 28 0+ juvenile fish species. The most frequent was chub (Leuciscus cephalus, 23 localities), gudgeon (Gobio gobio, 19 localities) and roach (Rutilus rutilus, 19 localities). In 13 localities occured the fish fry of barbel (Barbus barbus) wich is positive surprise due to its sensitivity to water pollution. In contrast the massive presence of round goby (Neogobius melanostomus) in some localities was an unpleasant finding. 4 localities were without fish fry. This survey has observed increasing trend of biodiversity depending on improving of hydromorphological status while the abundance showed almost no diference. Saprobic index of 0+ juvenilie fish community increased with deteriorating of water quality which could mean that the fish fry is relatively reliable indicator of water quality. The results of this diploma thesis could be used in documenting of Moravian streams and in comparisson with another monitorings in these localities.
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