A simple method to correct the results of acoustic surveys for fish hidden in the dead zone
In lentic freshwater systems, vertical acoustics may underestimate fish abundance in the acoustic dead zone where fish detection capability is...
26/11/2012
16/11/2012
Eel attacks-A new tool for assessing European eel (Anguilla anguilla) abundance and distribution patterns with gillnet sampling
Because of its complex life cycle, cryptic behavior, body shape, ability to excrete mucus and excellent maneuvering, the European eel (Anguilla...
12/07/2012
Comparison of Gill Nets and Fixed-Frame Trawls for Sampling Threadfin Shad in Tropical Reservoirs
Threadfin shad Dorosoma petenense populations were sampled quarterly from 2010 to 2011 to determine appropriate sampling techniques for this species...
10/06/2012
Littoral age 0+ fish distribution in relation to multi-scale spatial heterogeneity of a deep-valley reservoir
Littoral age 0+ fish were studied with respect to spatio-temporal heterogeneity in the deep-valley Římov Reservoir (Czech Republic) from June to...
08/05/2012
The size selectivity of the main body of a sampling pelagic pair trawl in freshwater reservoirs during the night
The aim of this study was to test the selectivity of a trawl main body, especially for small fish, during night sampling. The tested trawl had a mesh...
02/04/2012
Post-spawning dispersal of tributary spawning fish species to a reservoir system
This study investigated the post-spawning dispersal of seven species occurring in a tributary of the Římov Reservoir during the years 2000-2004....
19/01/2012
The use of artificial spawning substrates in order to understand the factors influencing the spawning site selection, depth of egg strands deposition and hatching time of perch (Perca fluviatilis L.)
The distribution of egg strands of perch Perca fluviatilis and factors affecting this distribution, in terms of spawning sites and spawning depths...
06/12/2011
The influence of the trawl mouth opening size and net colour on catch efficiency during sampling of early stages of perch (Perca fluviatilis) and pikeperch (Sander lucioperca) in the bathypelagic layer of a canyon-shaped reservoir
The efficiency of different sized (0.5 m × 2 m, 1 m × 2 m, 2 m × 2 m, 4 m × 2 m) and coloured (black, white) ichthyoplankton trawl nets was...
18/10/2011
Location and timing of the deposition of egg strands by perch (Perca fluviatilis L.): the roles of lake hydrology, spawning substrate and female size
The reproduction biology of perch Perca fluviatilis was studied in relation to lake hydrology, spawning substrate and female size using SCUBA divers...
14/06/2011
The influence of diel period on fish assemblage in the unstructured littoral of reservoirs
Diel changes in littoral fish assemblage were studied in four reservoirs in the Czech Republic (Central Europe). The sampling was performed by beach...
16/11/2010
A model of gillnet catch in relation to the catchable biomass, saturation, soak time and sampling period
We developed a new approach for evaluating gillnet catches. A model of a gillnet catch was built to differentiate the effects of gillnet saturation,...
12/08/2010
Sinusoidal swimming in fishes: the role of season, density of large zooplankton, fish length, time of the day, weather condition and solar radiation
The sinusoidal swimming of fish, previously interpreted as foraging behaviour, was studied with respect to season, density of large zooplankton, fish...
12/04/2010
Deep spawning of perch (Perca fluviatilis, L.) in the newly created ChabaA (TM) ovice Lake, Czech Republic
The egg strands of perch were found at up to a depth of 20.2 m and, on average, 88% of perch spawning activity occurred at depths greater than 3 m....
18/03/2010
The influence of the trawl mouth opening size and net colour on catch efficiency during sampling of early fish stages
The efficiency of different sized (0.5 m × 2 m, 1 m × 2 m, 2 m × 2 m, 4 m × 2 m) and coloured (black, white) ichthyoplankton trawl nets and the...
07/01/2010
Fish activity as determined by gillnet catch: A comparison of two reservoirs of different turbidity
Fish activity was monitored analyzing the catches of gillnets exposed for short time intervals at night. Experiments were done in two Central...
03/05/2009
Distribution of egg strands of perch (Perca fluviatilis L.) with respect to depth and spawning substrate
The distribution of egg strands of perch Perca fluviatilis was studied in relation to water depth and spawning substrate during late April and early...
08/04/2009
Hydroacoustic estimates of fish stocks in temperate reservoirs: day or night surveys?
Day and night acoustic surveys were used to compare fish stock estimates at eight European reservoirs and one flooded mining pit. During both...
03/03/2009
Long-term development of fish populations in the Rimov Reservoir
The inshore fish community of the Římov Reservoir in the Czech Republic was evaluated over 21 years using shore seining at night. The development...
03/12/2008
Dependence of beach seine net efficiency on net length and diel period
The aim of this study was to quantify the efficiency of different lengths of beach seine nets for each diel period in freshwater reservoirs. Only...