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1

Wpływ automatycznego codziennego dokarmiania na wartość produkcji karpia

100%
Mares J.
Przegląd Rybacki
|
2012
|
tom 36
|
nr 5[125]
2

Cormorant [Phalacrocorax carbo] predation on fish populations in rivers of the Czech Republic

63%
Spurny P., Mares J.
Folia Universitatis Agriculturae Stetinensis. Piscaria
|
2000
|
tom 27
3

Environmental protection of port logistics using phase analysis

51%
Mares J., Camara A. H., Barsan G., Mosteanu D.
Polish Journal of Environmental Studies
|
2019
|
tom 28
|
nr 6
4

The food of roach, Rutilus rutilus (Actinopterygii: Cypriniformes: Cyprinidae), in a biomanipulated water supply reservoir

51%
Zapletal T., Mares J., Jurajda P., Vsetickova L.
Acta Ichthyologica et Piscatoria
|
2014
|
tom 44
|
nr 1
Background. Roach, Rutilus rutilus (Linnaeus, 1758), is an omnivorous fish species that is able to utilise a range of food resources. Both juvenile and older roach can negatively affect zooplankton abundance in freshwater bodies of water; hence populations are often reduced (biomanipulated) in order to increase zooplankton populations. The aim of this study was to assess the roach diet after large-scale removal of cyprinids (bream, roach) from a reservoir. The study was done to clarify the roach diet after three years of intensive reduction of cyprinid fish and also to find out how the roach feeding behaviour impacts the quantity of filtering zooplankton. As such, this study may help to explain more general relations within the aquatic food web and specify the roach diet during the vegetative season (from spring to autumn). Materials and Methods. This study was undertaken at the Hamry water supply reservoir in the Czech Republic. Samples of macrozoobenthos, periphyton, and zooplankton were collected as representative food resources. Fish were caught using a 100-m littoral beach seine during the April to October growing season in 2011. Supplementary fish were caught using a pelagic Nordic gillnet in August and September 2012 and a 15-m beach seine in June and August 2012. Gut contents were preserved in 4% formaldehyde for later laboratory analysis (frequency of occurrence, index of preponderance, index of gut fullness). Results. ‘Detritus’ was the major component found in roach guts, with no difference observed in age category or locality (littoral vs. open water areas). Significant differences were observed, however, between younger (0+ and 1+, 36–92 mm) and older (>3 years, >92 mm) fish. The 0+ and 1+ age groups also fed on zooplankton (P < 0.008), accompanied by Chironomidae (1+), while diet of older roach (3–4+; 6–8+) included macrophytes and periphyton, together with Cladocera (fish from open water; P < 0.008). Conclusion. The results demonstrate that detritus was the main ‘dietary’ component of roach during the growing season, with macrophytes and periphyton as complementary dietary items. Zooplankton was an important dietary component of mainly younger roach age classes. Roach appear to be an important component in ichthyo-eutrophication of the Hamry Reservoir, mainly through transfer of phosphorous from plants to water.
5

Results of rearing two-year-old European wels [Silurus glanis L.] in ponds stocked with intensively cultured yearling

51%
Mares J., Jirasek J., Ondra R.
Acta Ichthyologica et Piscatoria
|
1996
|
tom 26
|
nr 1
93-101
The aim of the present study was to investigate the ability of intensively reared European wels, (Silurus glanis L.) to adapt fish to pond conditions. Studies were carried out in two ponds in 1992 and four in 1993. The wels were stocked into the ponds when they were about 11 months of age and had average weights of: 498 and 469 g (1992) or 138, 281, 394 and 213 g (1993) respectively. When they were harvested at the age of 15-20 months, the average weights had increased to 1.461 and 2.125 g (survival 97 to 100%) for the fish stocked in 1992, and to 659, 1.323, 2.057 and 1.382 g (survival 86, 100, 87 and l00%) for the 1993 stock. Thus, European wels cultured intensively under controlled conditions do not lose their ability to actively seek and feed on live prey. Consequently it appears that intensively cultivated European wels may be stocked into ponds, and intensive rearing enables the stocking of fish at one year of age when the body weight may approach 500 g.
6

The influence of toxic cyanobacterial water blooms on the hematological indicators of silver carp [Hypophthalmichthys molitrix Val.]

51%
Kopp R., Mares J., Kubicek Z., Babica P.
Oceanological and Hydrobiological Studies
|
2005
|
tom 34
|
nr Suppl.3
7

Evaluation of production efficiency of selected feed mixes at intensive culture of European wels [Silurus glanis L.]

51%
Mares J., Wognarova S., Spurny P.
Acta Scientiarum Polonorum. Piscaria
|
2003
|
tom 02
|
nr 1
8
Content available remote

Perifocal and remote blood-brain barrier disruption in cortical photothrombotic ischemic lesion and its modulation by the choice of anesthesia

45%
Krysl D., Deykun K., Lambert L., Pokorny J., Mares J.
Journal of Physiology and Pharmacology
|
2012
|
tom 63
|
nr 2
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