The aim of presented diploma thesis was 7-months monitoring of biogenous elements (P, N) in water and its determination in bottom sediments within selected fihsponds assigned by Rybníkářství Pohořelice a.s. Studied fihsponds were Šumický horní, Šumický dolní and Pohořelický. Sampling of water was carried out twice a month from two separate sampling spots, both near the fishpond dam. Basic physicochemical parameters of water were measured in locality, samples for laboratory chemical analysis and plankton analysis were transported to the Department of Fisheries and Hydrobiology for further analysing. The main aim of this project was to account for massive fish kill in summer season in the fishpond Pohořelický dolní on which was Rybníkářství Pohořelice a.s. focused mainly. Realized monitoring showed rapid decrease in dissolved oxygen amount in water which caused mainly the fish kill. Based on this result, decreasing of fish stock intensity and lower fertilization with manure within fishpond management was suggested as suitable. Subsequently, the mud removal of fishpond and use of superphosphate when the level of dissolved oxygen goes below the critical limit was suggested as well.
| Identifer | oai:union.ndltd.org:nusl.cz/oai:invenio.nusl.cz:362505 |
| Date | January 2016 |
| Creators | Horák, Filip |
| Source Sets | Czech ETDs |
| Language | Czech |
| Detected Language | English |
| Type | info:eu-repo/semantics/masterThesis |
| Rights | info:eu-repo/semantics/restrictedAccess |
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