Search Results - "FROUZOVÁ, Jaroslava"

Feasibility of Time-Dependent Amplitude in Pulse-Compressed Broadband Acoustic Signals for Determining the Dorsal Orientation of Fish by Tušer, Michal, Brabec, Marek, Balk, Helge, Draštík, Vladislav, Kubečka, Jan, Frouzová, Jaroslava

“…Fish body orientation significantly influences the size obtained with hydroacoustic signals, and thus the estimate of fish size and biomass. For this reason,…”
Get full text

Bear trade in the Czech Republic: an analysis of legal and illegal international trade from 2005 to 2020 by Shepherd, Chris R., Kufnerová, Jitka, Cajthaml, Tomáš, Frouzová, Jaroslava, Gomez, Lalita

“…There is a large demand for bear parts in the Czech Republic, and this drives legal and illegal trade in various bear species sourced from outside the country…”
Get full text

Macrophytes shape trophic niche variation among generalist fishes by Vejříková, Ivana, Eloranta, Antti P, Vejřík, Lukáš, Šmejkal, Marek, Čech, Martin, Sajdlová, Zuzana, Frouzová, Jaroslava, Kiljunen, Mikko, Peterka, Jiří

“…Generalist species commonly have a fundamental role in ecosystems as they can integrate spatially distinct habitats and food-web compartments, as well as…”
Get full text

Calibration of fish biomass estimates from gillnets: Step towards broader application of gillnet data by Říha, Milan, Prchalová, Marie, Brabec, Marek, Draštík, Vladislav, Muška, Milan, Tušer, Michal, Bartoň, Daniel, Blabolil, Petr, Čech, Martin, Frouzová, Jaroslava, Holubová, Michaela, Jůza, Tomáš, R. Moraes, Karlos, Rabaneda-Bueno, Ruben, Sajdlová, Zuzana, Souza, Allan T., Šmejkal, Marek, Vašek, Mojmír, Vejřík, Lukáš, Vejříková, Ivana, Peterka, Jiří, Kubečka, Jan

“…•The aim of this study was to calibrate gillnet catches using Fish Biomass per Area obtained by active methods.•We found a strong positive linear relationship…”
Get full text

Pelagic underyearling communities in a canyon-shaped reservoir in late summer by JŮZA, Tomáš, VAŠEK, Mojmír, KUBEČKA, Jan, SEĎA, Jaromír, MATĚNA, Josef, PRCHALOVÁ, Marie, PETERKA, Jiří, ŘÍHA, Milan, JAROLÍM, Oldřich, TUŠER, Michal, KRATOCHVÍL, Michal, ČECH, Martin, DRAŠTÍK, Vladislav, FROUZOVÁ, Jaroslava, HOHAUSOVÁ, Eva, ŽALOUDÍK, Jiří

“…The community of pelagic fish fry present during late summer was studied in the canyon-shaped and eutrophic Římov Reservoir, Czech Republic, using nighttime…”
Get full text

Real-time distribution of pelagic fish: combining hydroacoustics, GIS and spatial modelling at a fine spatial scale by Muška, Milan, Tušer, Michal, Frouzová, Jaroslava, Mrkvička, Tomáš, Ricard, Daniel, Seďa, Jaromír, Morelli, Federico, Kubečka, Jan

“…Understanding spatial distribution of organisms in heterogeneous environment remains one of the chief issues in ecology. Spatial organization of freshwater…”
Get full text

Seasonal and Spatial Dynamics of Gas Ebullition in a Temperate Water‐Storage Reservoir by Tušer, Michal, Picek, Tomáš, Sajdlová, Zuzana, Jůza, Tomáš, Muška, Milan, Frouzová, Jaroslava

“…Gas ebullition of river impoundments plays an increasingly significant role, particularly in transporting methane CH4 from their sediments to the atmosphere,…”
Get full text

Somatic growth of pikeperch (Stizostedion lucioperca) in relation to variation in temperature and eutrophication in a Central Europe Lake by Tesfaye, Million, Souza, Allan T., Soukalová, Kateřina, Šmejkal, Marek, Hejzlar, Josef, Prchalová, Marie, Říha, Milan, Muška, Milan, Vašek, Mojmír, Frouzová, Jaroslava, Blabolil, Petr, Boukal, David S., Kubečka, Jan

“…Global climate change has been altering freshwater ecosystems by impacting many ecological processes, including individual fish growth. Predictions of…”
Get full text

Diel changes in vertical and horizontal distribution of cladocerans in two deep lakes during early and late summer by Antón-Pardo, María, Muška, Milan, Jůza, Tomáš, Vejříková, Ivana, Vejřík, Lukáš, Blabolil, Petr, Čech, Martin, Draštík, Vladislav, Frouzová, Jaroslava, Holubová, Michaela, Říha, Milan, Sajdlová, Zuzana, Šmejkal, Marek, Peterka, Jiří

“…Temporal and spatial heterogeneity in the distribution of cladocerans in lakes could be caused by abiotic (wind, water currents) and biotic factors…”
Get full text

Are ivory antiques actually antique? by Kufnerová, Jitka, Pachnerová Brabcová, Kateřina, Suchý, Václav, Ovšonková, Zuzana A., Frouzová, Jaroslava, Cajthaml, Tomáš, Světlík, Ivo

“…Twenty-five samples of ivory artefacts were analysed using a radiocarbon dating method. These artefacts were part of a collection of 77 items seized during a…”
Get full text

Are diel vertical migrations of European perch (Perca fluviatilis L.) early juveniles under direct control of light intensity? Evidence from a large field experiment by Sajdlová, Zuzana, Frouzová, Jaroslava, Draštík, Vladislav, Jůza, Tomáš, Peterka, Jiří, Prchalová, Marie, Říha, Milan, Vašek, Mojmír, Kubečka, Jan, Čech, Martin

“…Diel vertical migrations (DVMs) belong among the most pronounced movements in the aquatic environment. A general pattern of DVMs has been well described,…”
Get full text

Distribution of Herbivorous Fish Is Frozen by Low Temperature by Vejříková, Ivana, Vejřík, Lukáš, Syväranta, Jari, Kiljunen, Mikko, Čech, Martin, Blabolil, Petr, Vašek, Mojmír, Sajdlová, Zuzana, Chung, Son Hoang The, Šmejkal, Marek, Frouzová, Jaroslava, Peterka, Jiří

“…The number of herbivores in populations of ectothermic vertebrates decreases with increasing latitude. At higher latitudes, fish consuming plant matter are…”
Get full text

A novel upward-looking hydroacoustic method for improving pelagic fish surveys by Baran, Roman, Jůza, Tomáš, Tušer, Michal, Balk, Helge, Blabolil, Petr, Čech, Martin, Draštík, Vladislav, Frouzová, Jaroslava, Jayasinghe, Asanka D., Koliada, Ievgen, Mrkvička, Tomáš, Muška, Milan, Ricard, Daniel, Sajdlová, Zuzana, Vejřík, Lukáš, Kubečka, Jan

“…For ethical reasons and animal welfare, it is becoming increasingly more important to carry out ecological surveys with a non-invasive approach. Information…”
Get full text

Fish stock mass reduction is indicated in standard abundance and biomass estimates from gillnets and hydroacoustics by Jůza, Tomáš, Blabolil, Petr, Čech, Martin, Draštík, Vladislav, Frouzová, Jaroslava, Sajdlová, Zuzana, Holubová, Michaela, Kočvara, Luboš, Kolařík, Tomáš, Moraes, Karlos R., Muška, Milan, Souza, Allan T., Vašek, Mojmír, Říha, Milan, Tušer, Michal, Šmejkal, Marek, Peterka, Jiří, Prchalová, Marie, Jan Kubečka

“…Gillnetting is a technique commonly used in relative abundance and biomass estimates of fish. However, due to its passive nature, the direct recalculation of…”
Get full text

New way to investigate fish density and distribution in the shallowest layers of the open water by Baran, Roman, Blabolil, Petr, Čech, Martin, Draštík, Vladislav, Frouzová, Jaroslava, Holubová, Michaela, Jůza, Tomáš, Koliada, Ievgen, Muška, Milan, Peterka, Jiří, Prchalová, Marie, Říha, Milan, Sajdlová, Zuzana, Šmejkal, Marek, Tušer, Michal, Vejřík, Lukáš, Kubečka, Jan

“…•Quantitative and nondestructive sampling of surface layers of waterbodies represent great challenge.•Investigations show that most of the fish stay in upper…”
Get full text

Immersion mass marking of pikeperch (Sander lucioperca) larvae in oxytetracycline hydrochloride and its detection using fluorescence microscopy by Blabolil, Petr, Frouzová, Jaroslava, Matěna, Josef, Peterka, Jiří

“…Fish marking is essential to distinguish between stocked and naturally reproduced fish. This procedure is challenging, especially in early life stages…”
Get full text

Small fish use the hypoxic pelagic zone as a refuge from predators by Vejřík, Lukáš, Matějíčková, Ivana, Jůza, Tomáš, Frouzová, Jaroslava, Seďa, Jaromír, Blabolil, Petr, Ricard, Daniel, Vašek, Mojmír, Kubečka, Jan, Říha, Milan, Čech, Martin

“…Summary Juvenile perch (Perca fluviatilis) often inhabit deep zones of lakes or reservoirs (metalimnion to hypolimnion). Using fry trawling and hydroacoustic…”
Get full text

Can corporate supply chain sustainability standards contribute to soil protection? by Frouz, Jan, Äemus, VojtÄch, Frouzová, Jaroslava, Peterková, Alena, Kotecký, VojtÄch

“…Companies increasingly view soil degradation in their supply chains as a commercial risk. They have applied sustainability standards to manage environmental…”
Get full text

Evaluation of potential bias in observing fish with a DIDSON acoustic camera by Tušer, Michal, Frouzová, Jaroslava, Balk, Helge, Muška, Milan, Mrkvička, Tomáš, Kubečka, Jan

“…The DIDSON multi-beam sonar has become a popular tool for monitoring fish. The aim of this study was to determine how well the DIDSON sonar can detect and…”
Get full text

Collapse of the native ruffe (Gymnocephalus cernua) population in the Biesbosch lakes (the Netherlands) owing to round goby (Neogobius melanostomus) invasion by Jůza, Tomáš, Blabolil, Petr, Baran, Roman, Bartoň, Daniel, Čech, Martin, Draštík, Vladislav, Frouzová, Jaroslava, Holubová, Michaela, Ketelaars, Henk A. M., Kočvara, Luboš, Kubečka, Jan, Muška, Milan, Prchalová, Marie, Říha, Milan, Sajdlová, Zuzana, Šmejkal, Marek, Tušer, Michal, Vašek, Mojmír, Vejřík, Lukáš, Vejříková, Ivana, Wagenvoort, Arco J., Žák, Jakub, Peterka, Jiří

“…We investigated the change in benthic fish communities in three artificial lakes of the Biesbosch area in the Netherlands between two time periods: before and…”
Get full text