No (437)
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Ichtyological survey of the Lipno reservoir in 2021.
Soukalová, Kateřina; Kubečka, Jan; Jůza, Tomáš; Kočvara, Luboš; Sajdlová, Zuzana; Souza, Allan T.; Kolařík, Tomáš
2022 - Czech
The report describes the evaluation of the development of fish communities and their quantity in the Lipno reservoir in 2021. Zpráva popisuje vyhodnocení vývoj rybích společenstev a jejich množství v nádrži Lipno r. 2021.
Keywords:
pikeperch; fish community; fishing
Available at various institutes of the ASCR
Ichtyological survey of the Lipno reservoir in 2021.
The report describes the evaluation of the development of fish communities and their quantity in the Lipno reservoir in 2021.
Report on the distribution of the ichthyofauna under the natural lakes of Šumava.
Blabolil, Petr; Hůda, J.; Muška, Milan; Draštík, Vladislav; Holubová, Michaela; Hladík, Milan; Vrba, Jaroslav
2022 - Czech
The report describes the results of ichthyological surveys in the areas below the glacial lakes of Šumava. Zpráva popisuje výsledky ichtyologických průzkumů v oblastech pod ledovcovými jezery Šumavy.
Keywords:
recovery; brown trout; migration
Available at various institutes of the ASCR
Report on the distribution of the ichthyofauna under the natural lakes of Šumava.
The report describes the results of ichthyological surveys in the areas below the glacial lakes of Šumava.
Report on the progress of work related to the conservation of common bream in 2022.
Šmejkal, Marek; Kiran, Thomas; Gottwald, M.
2022 - Czech
The report decribes mionitoring and conservation work on crucian carp in 2022. Zpráva popisuje práce na ochraně a mapování karase obecného v roce 2022.
Keywords:
silver bream; common bream; recovery ecology
Available at various institutes of the ASCR
Report on the progress of work related to the conservation of common bream in 2022.
The report decribes mionitoring and conservation work on crucian carp in 2022.
Study of the limnological components of the ecosytem of Lake Medard in 2022.
Peterka, Jiří; Hejzlar, Josef; Nedoma, Jiří; Znachor, Petr; Seďa, Jaromír; Vejřík, Lukáš
2022 - Czech
The report summarizes the research results of the limnological components of the ecosystem of the newly created Medard postmining lake achieved for the year 2022 and recommendations for further monitoring. Zpráva sumarizuje dosažené výsledky výzkumu limnologických složek ekosystému nově vzniklého důlního jezera Medard za rok 2022 a doporučení pro další sledování.
Keywords:
ecology; restoration; mining lakes
Available at various institutes of the ASCR
Study of the limnological components of the ecosytem of Lake Medard in 2022.
The report summarizes the research results of the limnological components of the ecosystem of the newly created Medard postmining lake achieved for the year 2022 and recommendations for further ...
Protection of Scots pines (Pinus sylvestris L.) against bark beetles in the Czech Republic
Doležal, Petr; Davídková, Markéta
2022 - Czech
The report contains practical recommendations aimed at increasing the effectiveness of protective measures against bark beetles on Scots pine in the Czech Republic. It also contains data on species of the genus Orthotomicus, whose practical importance has increased in recent years. Zpráva obsahuje praktická doporučení směřující k vyšší efektivitě ochranných zásahů proti kůrovcům na borovici lesní v ČR. Věnuje se i zástupcům rodu Orthotomicus, jejichž praktický význam v posledních letech stoupá.
Keywords:
bark beetles; Scots pine; forest protection; Orthotomicus sp.
Available at various institutes of the ASCR
Protection of Scots pines (Pinus sylvestris L.) against bark beetles in the Czech Republic
The report contains practical recommendations aimed at increasing the effectiveness of protective measures against bark beetles on Scots pine in the Czech Republic. It also contains data on species of ...
Complex survey of the fish stock of Karhov, Obecnice and Pilská Reservoirs in 2021.
Muška, Milan; Blabolil, Petr; Kočvara, Luboš; Soukalová, Kateřina
2022 - Czech
The report describes the results of an complex survey of Karhov, Obecnice and Pilská Reservoirs fish assemblages and recommendations for their further management. Zpráva popisuje výsledky ichtyologického průzkumu nádrží Karhov, Pilská a Obecnice a doporučení pro jejich další obhospodařování.
Keywords:
fish community; Brdy Protected Area; survey
Available at various institutes of the ASCR
Complex survey of the fish stock of Karhov, Obecnice and Pilská Reservoirs in 2021.
The report describes the results of an complex survey of Karhov, Obecnice and Pilská Reservoirs fish assemblages and recommendations for their further management.
Content of iron and quality of organic matter as a factor affecting stabilization of carbon and nutrients in fresh water ecosystems.
Osafo, Nana O. A.; Jan, Jiří; Porcal, Petr; Borovec, Jakub
2022 - Czech
The effect of watershed geochemistry, in terms of soil pH, Fe concentration and organic matter quality, on the stability of organic carbon and nutrients level in freshwater sediments of shallow lakes was studied. Twelve fishponds were divided into two groups based on the typical soil pH: i) watershed with acidic soils (pH 5.1 – 6.3) rich in Fe called H_Fe and ii) watershed with neutral pH soils (pH 6.8 – 7.6) poor in Fe called L_Fe. The parameters of the water column, pore water and sediment chemical extractions were compared. A higher concentration of hydrated Fe oxides, together with the aromatic character of organic substances were shown to highly contribute to the overall stabilization of the sediment. Conversely, low Fe concentrations were accompanied by lower mineralization of sediments and a higher risk for the aquatic ecosystem in terms of nutrient release or the development of anoxic conditions. Studie ukazuje, jak geochemické vlastnosti povodí, reprezentované obsahem Fe a hodnotami pH a s tím související kvalitou organických látek v půdách, ovlivňuji stabilizaci organického uhlíku a živin v sedimentech mělkých nádrží. V rámci prezentované studie bylo sledováno 12 rybníků z různých lokalit České republiky. Rybníky byly rozděleny na základě geologie povodí do dvou skupin i) povodí s kyselými půdami (pH 5,1 - 6,3) bohatými na železo (H_Fe) a ii) povodí s neutrálními půdami (pH = 6,8–7,6) a nízkým obsahem železa (L_Fe). Ve sledovaných rybnících byly porovnávaný parametry vodního sloupce, pórové vody a extrakce sedimentů z hlediska stabilizace organické hmoty a navazujících živinových koloběhů. Bylo ukázáno, jak vyšší koncentrace hydratovaných oxidů Fe, spolu s aromatickým charakterem organických látek přispívá k celkové stabilizaci sedimentu. Naopak nízké koncentrace Fe byly doprovázeny nižší mineralizaci sediment a vyšší rizikovosti pro vodní ekosystém z hlediska uvolňovaní živin nebo rozvoje anoxii.
Keywords:
sediments; watersheds; organic matter quality
Available at various institutes of the ASCR
Content of iron and quality of organic matter as a factor affecting stabilization of carbon and nutrients in fresh water ecosystems.
The effect of watershed geochemistry, in terms of soil pH, Fe concentration and organic matter quality, on the stability of organic carbon and nutrients level in freshwater sediments of shallow lakes ...
Radon in a lake – an estimation of ground water input.
Porcal, Petr
2022 - Czech
A balance study of radon activity in Lake Plešný and its tributaries was carried out in 2020 to refine the estimate of groundwater resources. The balance is based on quantification of sources, monitoring of the amount of water draining from the lake, and lead concentrations in the overlying sediments. V roce 2020 byla realizována bilanční studie aktivity radonu v Plešném jezeře a jeho přítocích s cílem zpřesnění odhadu zdrojů podzemní vody. Bilance je založena na kvantifikaci zdrojů, monitorování množství vody odtékající z jezera a koncentrace olova ve vrchních vrstvách sedimentů.
Keywords:
radon; water balance; lake
Available at various institutes of the ASCR
Radon in a lake – an estimation of ground water input.
A balance study of radon activity in Lake Plešný and its tributaries was carried out in 2020 to refine the estimate of groundwater resources. The balance is based on quantification of sources, ...
Fish stock monitoring in Kamenný fishpond in 2022.
Draštík, Vladislav; Jůza, Tomáš; Blabolil, Petr
2022 - Czech
The report summarizes the research result of stock assessment in Kamenný pond in 2022. Zpráva sumarizuje výsledky průzkumu Kamenného rybníka v roce 2022.
Keywords:
electrofishing; fish communities; biomanipulation
Available at various institutes of the ASCR
Fish stock monitoring in Kamenný fishpond in 2022.
The report summarizes the research result of stock assessment in Kamenný pond in 2022.
Assessment of the status of rheophilic fish in the Vltava basin and key factors affecting their populations.
Šmejkal, Marek; Bartoň, Daniel
2022 - Czech
The report describes ecological status of fish in Vltava River basin with special attention to rheophilic fish species. Zpráva popisuje vyhodnocení ekologického potenciálu v povodí Vltavy s důrazem na výskyt a reprodukci reofilních ryb.
Keywords:
habitat degradation; rheophilic fish; stranding
Available at various institutes of the ASCR
Assessment of the status of rheophilic fish in the Vltava basin and key factors affecting their populations.
The report describes ecological status of fish in Vltava River basin with special attention to rheophilic fish species.
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