National Repository of Grey Literature 4 records found  Search took 0.01 seconds. 
Fish stock survey of the Lake Sevan in 2023 – catch summary report
Prchalová, Marie
Catch summary report on survey of fish stock of the Lake Sevan in July 2023.\n
Fish stock survey of the Lake Sevan in 2023 – final report
Prchalová, Marie ; Kubečka, Jan
Final report on survey of fish stock of the Lake Sevan in July 2023.
Hydrobiological report on the Vrchlice reservoir focusing on fish and phytoplankton
Čech, Martin ; Vejřík, Lukáš ; Rychtecký, Pavel ; Jezberová, Jitka ; Kozlíková, Eliška ; Znachor, Petr
The report summarizes two first years of the research of Vrchlice Reservoir in a trophic level of fish and phytoplankton
Species composition along the vertical gradietn in canyon-shaped reservoirs
Prchalová, Marie ; Kubečka, Jan
During years 2004 and 2005, vertical gradients of fish distribution within two canyon-shaped Czech water supply reservoirs (Římov, Švihov) were examined by Nordic multimesh gillnets in both pelagic and benthic habitats. In the open water, most fish were found in the upper 5 m of depth. Below this depth nearly no fish occurred. The community was represented mainly by bleak. Towards deeper parts the portion of perch increased. In benthic areas, most fish were in the upper 3 m of depth. Abundance declined to 10 m and below this depth nearly no fish were present. Perch and roach dominated the littoral community. Ruffe preferred the deeper habitats. With respect to biomanipulative removal catches, it is sufficient to fish in the upper 5 m of the open water and in the upper 3 m in the littoral of the reservoir. For getting a rough but adequate assessment of fish community, it is satisfactory to sample the upper 5 m of the open water and the upper 10 m in the benthic part of the reservoir.

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