Number of found documents: 80
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Fish stock assessment of the De Gijster Reservoir in 2014
Vašek, Mojmír; Jůza, Tomáš; Říha, Milan; Soukalová, Kateřina; Kočvara, Luboš
2015 - English
The aim of the complex ichthyological survey of De Gijster Reservoir in 2014 was the description of fish community composition and succession with the emphasis put on the abundance and biomass estimates. All important littoral/benthic and pelagic habitats were sampled using the well-established methods (benthic and pelagic gillnets, shore seining and pelagic fry trawling) aiming particularly on the improvement of abundance and biomass estimates of large fish. Keywords: fish community composition; succession; biomanipulation Available at various institutes of the ASCR
Fish stock assessment of the De Gijster Reservoir in 2014

The aim of the complex ichthyological survey of De Gijster Reservoir in 2014 was the description of fish community composition and succession with the emphasis put on the abundance and biomass ...

Vašek, Mojmír; Jůza, Tomáš; Říha, Milan; Soukalová, Kateřina; Kočvara, Luboš
Biologické centrum, 2015

Fish stock assessment of the Honderd en Dertig Reservoir in 2014
Jůza, Tomáš; Vašek, Mojmír; Říha, Milan; Soukalová, Kateřina; Kočvara, Luboš
2015 - English
The aim of the complex ichthyological survey of Honderd en Dertig Reservoir in 2014 was the description of fish community composition and succession with the emphasis put on the abundance and biomass estimates. All important littoral/benthic and pelagic habitats were sampled using the well-established methods (benthic and pelagic gillnets, shore seining and pelagic fry trawling) aiming particularly on the improvement of abundance and biomass estimates of large fish. Keywords: fish community composition; succession; biomanipulation Available at various institutes of the ASCR
Fish stock assessment of the Honderd en Dertig Reservoir in 2014

The aim of the complex ichthyological survey of Honderd en Dertig Reservoir in 2014 was the description of fish community composition and succession with the emphasis put on the abundance and biomass ...

Jůza, Tomáš; Vašek, Mojmír; Říha, Milan; Soukalová, Kateřina; Kočvara, Luboš
Biologické centrum, 2015

ECOFIL 2014 Ecology of Fish in Lakes and Reservoirs. Book of Abstracts
Soukalová, Kateřina; Kubečka, Jan
2014 - English
Keywords: fish; ecology; lakes; reservoirs Available at various institutes of the ASCR
ECOFIL 2014 Ecology of Fish in Lakes and Reservoirs. Book of Abstracts

Soukalová, Kateřina; Kubečka, Jan
Biologické centrum, 2014

Study of structure and chemical composition of soil humic substances isolated from humic podzol
Enev, V.; Klučáková, M.; Novák, František
2014 - English
The aim of this work was study chemical composition and structure of soil humic substances (HS). Object of our study were three samples HS which were isolated from Humic Podzol (locality Krkonoše, Czech Republic). Isolation of HS was performed according to the procedure recommended by the International Humic Substances Society. All samples of HS were characterized by elemental analysis (EA), ultraviolet-visible spectroscopy (UV/Vis), infrared spectroscopy (FTIR) and steady-state fluorescence spectroscopy. Absorption coefficients (E.sub.ET./sub./E.sub.BZ./sub., E.sub.2./sub./E.sub.3./sub. and E.sub.4./sub./E.sub.6./sub.) of HS were calculated from the absorbance values. Fluorescence coefficients (Milori index and Zsolnay index) of HS were calculated from the area of the emission spectra. Keywords: structure; chemical composition; soil humic substances; humic podzol Available at various institutes of the ASCR
Study of structure and chemical composition of soil humic substances isolated from humic podzol

The aim of this work was study chemical composition and structure of soil humic substances (HS). Object of our study were three samples HS which were isolated from Humic Podzol (locality Krkonoše, ...

Enev, V.; Klučáková, M.; Novák, František
Biologické centrum, 2014

Insect anti-stress hormones and their role in keeping of metabolic homeostasis
Kodrík, Dalibor
2014 - English
Keywords: anti-stress hormones Available at various institutes of the ASCR
Insect anti-stress hormones and their role in keeping of metabolic homeostasis

Kodrík, Dalibor
Biologické centrum, 2014

Screening, identification and analysis of metabolites in the fungus Purpureocillium lilacinus
Šimek, Petr
2013 - English
The delivered samples of the strain Purpureocillium lilacinus PL11 were extracted for analysis of polar metabolites and the extracts were subjected to LC-MS analysis. Keywords: Purpureocillium lilacinus Available at various institutes of the ASCR
Screening, identification and analysis of metabolites in the fungus Purpureocillium lilacinus

The delivered samples of the strain Purpureocillium lilacinus PL11 were extracted for analysis of polar metabolites and the extracts were subjected to LC-MS analysis.

Šimek, Petr
Biologické centrum, 2013

12th Central European Workshop on Soil Zoology, Abstract book
Tajovský, Karel
2013 - English
Keywords: Central Europe; soil zoology; abstracts Available at various institutes of the ASCR
12th Central European Workshop on Soil Zoology, Abstract book

Tajovský, Karel
Biologické centrum, 2013

The food preferences of asian lady beetle Harmonia axyridis
Šenkeříková, P.; Nedvěd, Oldřich
2012 - English
Survey of food preferences of Asian ladybird Harmonia axyridis included two-choice and no-choice tests. Wingless females of aphids Acyrthosiphon pisum, Aphis fabae cirsiiacanthoidis and Aphis sambuci were offered to twenty-four hours starving ladybirds. No-choice tests we conducted only with adults. We gave them 20 individuals of one aphid species and we found that ladybirds fed most number of A. pisum. In two-choice test, we combined pairs of studied species: A. f cirsiiacanthoidis x A. pisum, A. pisum x A. sambuci, A. sambuci x A. f cirsiiacanthoidis. We put 10 aphids of each of the two species combined into a plastic Petri dish and then we introduced one ladybird adult or larva. We made 20 replicates with adults. We found that there was statistical difference only in the combination A. sambuci vs. A. f cirsiiacanthoidis, where males consumed more individuals of the toxic aphid A. sambuci. For this combination, we then made 20 replicates with larvae who preyed in contrast with males more of the suitable food A. f cirsiiacanthoidis than toxic A. sambuci. We also studied the influence of contrasting background on food choice in adults. We used both tests and all combinations. We found that females did not prefer any aphid species, except for the black A. f cirsiiacanthoidis being consumed more often than the green A. pisum on black background. Because they consumed much more A. pisum in no-choice experiment on both backgrounds, the difference in choice experiment is very strong and its polarity surprising. Keywords: ladybird; Coccinellidae; Harmonia axyridis Available at various institutes of the ASCR
The food preferences of asian lady beetle Harmonia axyridis

Survey of food preferences of Asian ladybird Harmonia axyridis included two-choice and no-choice tests. Wingless females of aphids Acyrthosiphon pisum, Aphis fabae cirsiiacanthoidis and Aphis sambuci ...

Šenkeříková, P.; Nedvěd, Oldřich
Biologické centrum, 2012

Report on acoustic fish stock assessment of Neusiedlersee, August 2010
Draštík, Vladislav; Kubečka, Jan
2011 - English
Keywords: hydroacoustic monitoring survey; split beam echosounder; fish abundance Available at various institutes of the ASCR
Report on acoustic fish stock assessment of Neusiedlersee, August 2010

Draštík, Vladislav; Kubečka, Jan
Biologické centrum, 2011

Role of adipokinetic peptides in control of insect anti-stress reactions
Kodrík, Dalibor
2011 - English
Adipokinetic hormones (AKHs) control predominantly insect metabolism, but are involved also in a number of other activities. Recently, it was proven that AKHs participated also in the activation of antioxidant protection mechanisms: they increased a level of reduced glutathione and additionally, modulated the activity of catalase that reduces hydrogen peroxide to water and oxygen. It has also been found that AKHs participated on antistress reaction elicited by insecticides and increased the lethal effect of the insecticides alone. The results show that AKHs provide an initiation of the complex antistress response that involves both biochemical and physiological protective mechanisms. Keywords: Insect; adipokinetic hormone; stress Available at various institutes of the ASCR
Role of adipokinetic peptides in control of insect anti-stress reactions

Adipokinetic hormones (AKHs) control predominantly insect metabolism, but are involved also in a number of other activities. Recently, it was proven that AKHs participated also in the activation of ...

Kodrík, Dalibor
Biologické centrum, 2011

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