Recherche documentaire
Trier par :
-
Petr Blabolil / Milan Říha / Daniel Ricard / Jiří Peterka / Marie Prchalová / Mojmír Vašek / Martin Čech / Jaroslava Frouzová / Tomáš Jůza / Milan Muška / Michal Tušer / Vladislav Draštík / Zuzana Sajdlová / Marek Šmejkal / Lukáš Vejřík / Josef Matěna / David S. Boukal / David Ritterbusch / Jan Kubečka - 2017The assessment of ecological quality in freshwater ecosystems is a key issue in many countries, but conditions for the development of assessment methodologies are often country-specific. This study proposes a simple methodology for the assessment of the ecological potential of reservoirs based on...Contributeur (s):
-
Milan Říha / Jan Kubečka / Tomáš Mrkvička / Marie Prchalová / Martin Čech / Vladislav Draštík / Jaroslava Frouzová / Milan Hladík / Eva Hohausová / Oldřich Jarolím / Tomáš Juza / Michal Kratochvíll / Jiří Peterka / Michal Tušer / Mojmír Vašek - 2008The aim of this study was to quantify the efficiency of different lengths of beach seine nets for each diel period in freshwater reservoirs. Only fish older than young-of-the-year were considered. Nets of 10, 20 and 50 m length (“in-nets”) were tested in an enclosed area framed by a 200...Contributeur (s):
-
Marie Prchalová / Vladislav Draštík / Jan Kubečka / Boonsong Sricharoendham / Fritz Schiemer / Jacobus Vijverberg - 2003The fish and invertebrate behavior of the Ubol Ratana Reservoir, Thailand, were monitored using up- and downlooking split beam sonar located at a fixed location. In the same area and period, ichthyoplankton nets and multimesh gillnets were used. The bulk of targets, recorded by acoustics...Contributeur (s):
-
Vladislav Draštík / Jan Kubečka / Martin Čech / Jaroslava Frouzová / Milan Říha / Tomáš Juza / Michal Tušer / Oldřich Jarolím / Marie Prchalová / Jiří Peterka / Mojmír Vašek / Michal Kratochvíl / Josef Matěna / Tomáš Mrkvička - 2009Day and night acoustic surveys were used to compare fish stock estimates at eight European reservoirs and one flooded mining pit. During both photoperiods of summer, higher fish biomass was observed in the uppermost 4 m of the water column by horizontal beaming than in deeper water by...Contributeur (s):