No (452)
Yes (34)
Number of found documents:
486
Published from
to
Interspecific and seasonal changes in epidermal structure of Carassius gibelio x Cyprinus carpio hybrids
Halačka, Karel; Vetešník, Lukáš
2014 - Czech
Morphology of epidermis Carassius gibelio and Cyprinus carpio shows specific differences in dependence on both sexual activity (reduction epidermal thickness in spawning period) and given species (epidermal thickness and prevalance of single types of secretory cells). Epidermis of hybrids shows similar seasonal changes as parental species, its structure was similar to epidermis of C. carpio.
Keywords:
Carassius gibelio; Cyprinus carpio
Available on request at various institutes of the ASCR
Interspecific and seasonal changes in epidermal structure of Carassius gibelio x Cyprinus carpio hybrids
Morphology of epidermis Carassius gibelio and Cyprinus carpio shows specific differences in dependence on both sexual activity (reduction epidermal thickness in spawning period) and given species ...
Ichthyological monitoring of the Hamry water reservoir in the year 2014
Jurajda, Pavel
2014 - Czech
This study, which has been running since 2008, examines the use of the Hamry Water Reservoir as a model for fish community biomanipulation studies with the aim of improving water quality. Of primary interest to the Reservoir administrators, the Elbe River Basin authority s.p., is the maintenance of high water quality for drinking purposes, thereby preventing conflict of interest with multiple stakeholders. In addition, the study aims to determine whether biomanipulation of fish communities can be undertaken effectively in a reservoir. Cílem celé studie, která probíhá již od roku 2008, je využití VN Hamry jako modelového objektu pro biomanipulační zásahy v rámci zlepšení kvality vody v nádrži. Prvotním zájmem správce VN, podniku Povodí Labe, s.p., je vysoká kvalita vody pro pitné účely, takže zde nedochází ke konfliktu zájmů více zainteresovaných stran. Cílem bylo rovněž zjistit, zda je vůbec reálné v podmínkách VN provádět efektivní biomanipulace s rybím společenstvem.
Keywords:
ichthyological monitoring; Hamry water reservoir
Available at various institutes of the ASCR
Ichthyological monitoring of the Hamry water reservoir in the year 2014
This study, which has been running since 2008, examines the use of the Hamry Water Reservoir as a model for fish community biomanipulation studies with the aim of improving water quality. Of primary ...
Final report of the project Monitoring and full-area of mapping SACs as a background for finalization of proposal of system Natura 2000 in the Czech Republic - part F 64 in the year 2014
Halačka, Karel
2014 - Czech
Monitoring on 45 localities on territory of the Czech Republic was realized in 2014. Observed were occurence and frequency of selected group of endangered fish species: Ukrainian brook lamprey (Eudontomyzon mariae), streber (Zingel streber), zingel (Zingel zingel), gudgeon (Romanogobio sp.), Danube ruffe (Gymnocephalus baloni), striped ruffe (Gymnocephalus schraetser), ziege (Pelecus cultratus), weatherfish (Misgurnus fossilis), golden loaches (Sabanejewia aurata) and spined loach (Cobitis sp.). V roce 2014 byl realizován monitoring na 45 lokalitách na území České republiky. Sledován byl výskyt a četnost vybrané skupiny ohrožených druhů ryb: mihule ukrajinská (Eudontomyzon mariae), drsek menší (Zingel streber), drsek větší (Zingel zingel) hrouzek běloploutvý (Romanogobio sp.), ježdík dunajský (Gymnocephalus baloni), ježdík žlutý (Gymnocephalus schraetser), ostrucha křivočará (Pelecus cultratus), piskoř pruhovaný (Misgurnus fossilis), sekavčík horský (Sabanejewia aurata), sekavec (Cobitis sp.)
Keywords:
Natura 2000; monitoring
Available at various institutes of the ASCR
Final report of the project Monitoring and full-area of mapping SACs as a background for finalization of proposal of system Natura 2000 in the Czech Republic - part F 64 in the year 2014
Monitoring on 45 localities on territory of the Czech Republic was realized in 2014. Observed were occurence and frequency of selected group of endangered fish species: Ukrainian brook lamprey ...
Growth of tagged common carp (Cyprius carpio) in selected water reservoirs, Morava River drainage area
Prokeš, Miroslav; Baruš, Vlastimil; Habán, V.; Mareš, J.; Peňáz, Milan; Halačka, Karel; Krejčí, R.; Vetešník, Lukáš
2014 - Czech
The project monitoring the growth of tagged two-season-old common carp (K2) being stocked into the selected reservoirs managed by the Moravian Angler Association was initiated in 2001 in the reservoir of Nové Mlýny. Few other reservoirs, namely the Dalešická, Brněnská, Vranovská and Letovická, were then also studied in course of the following period up today. The altitude of investigated reservoirs ranges 171-382 m a.s.l., the flooded area of water bodies 104-1600 hectares. The stocking series in every of reservoirs were performed in the course of subsequent five years and two thousands of tagged carps (K2) were always yearly stocked in every of reservoirs. In total, 50 335 (17.61 inds per hectare) tagged carps have been stocked and 1361 individuals (0.48 inds per hectare) were recaptured and reported by the anglers. The mean recapture rate of tagged fish reached thus 2.70 % (1.02 - 4.74 %). A significant negative relationship was also ascertained of altitude (in m a.s.l.) and growth indices. The maximum growth rate was found in the Novomlýnská reservoir (mean annual weight increment 1725 g). Gradually lower weight increments were found out in the Vranovská reservoir (1064 - 1200 g), Dalešická R. (1050 g), Brněnská R. (1070 g) and Letovická R. (630 g). A similar sequence existed also in growth of other parameters studied, i.e. total length (TL), specific growth rate (SGR), and weight condition expressed by means of the Fulton condition factor (FCF). On the basis of these results, some new, more convenient, rules were suggested for stocking of common carp.
Keywords:
common carp
Available on request at various institutes of the ASCR
Growth of tagged common carp (Cyprius carpio) in selected water reservoirs, Morava River drainage area
The project monitoring the growth of tagged two-season-old common carp (K2) being stocked into the selected reservoirs managed by the Moravian Angler Association was initiated in 2001 in the reservoir ...
Pilot study on the efficient use of ponds greater than 100 hectares
Mrkvová, Markéta; Jurajda, Pavel; Adámek, Zdeněk; Zukal, Jan
2014 - Czech
Fish distribution in carp ponds tends to be uneven as fish prefer those parts nearer the feeding sites. As such, carp usually only occupy around two thirds of the pond area. Compared with more remote parts of the pond, control sampling campaigns showed the regular occurrence of significantly larger fish at the feeding sites. Further, fish located on the feeding sites consumed cereals almost exclusively, whilst those outside the feeding sites grazed predominantly on zooplankton. Environmental parameters at the feeding sites differed from those in the surrounding area, particularly in relation to the post-feeding period. We recommend that fish farmers both increase the size of feeding sites and alternate feeding at different sites in an effort to spread the fish stock over the whole pond area, thereby better utilising natural food resources. Prostorová distribuce ryb v rybníce během vegetační sezóny není rovnoměrná. Ryby preferují části rybníka v blízkosti krmišť a převážně se zdržují v cca 2/3 plochy rybníka, která jsou jim nejblíže. Kontrolní odlovy prokázaly výskyt průkazně větších ryb na krmištích v porovnání s částmi rybníka mimo ně. Fyzikálně-chemické parametry vody na krmištích a mimo ně se lišily především v závislosti na době, která uplynula od vlastního předložení krmiv. Ryby na krmišti konzumovaly téměř výhradně podávané obiloviny, zatímco ryby mimo krmiště se živily přednostně zooplanktonem. Projekt přinesl doporučení rybářské praxi spočívající v rozšíření rozsahu a střídání krmných míst s cílem docílit lepšího rozptýlení obsádky po celé ploše rybníka a tím i lepšího využití přirozených potravních zdrojů.
Keywords:
carp ponds; fish distribution
Available at various institutes of the ASCR
Pilot study on the efficient use of ponds greater than 100 hectares
Fish distribution in carp ponds tends to be uneven as fish prefer those parts nearer the feeding sites. As such, carp usually only occupy around two thirds of the pond area. Compared with more remote ...
Application of genetic methods for the detection of deer origin and existence of interspecific hybridization
Krojerová-Prokešová, Jarmila; Barančeková, Miroslava; Koubek, Petr
2014 - Czech
Hybridization between native red deer and non-native sika deer is a real threat in the Czech Republic, even though its existence has been questioned for a long time. The main cause of hybrids’ non-acceptance has been the fact that no reliable methods of their detection exist until recently. However, the application of modern molecular-genetic methods, mainly the analyses of microsatellite loci polymorphism, helps us to detect the proportion of hybrid individuals in wild populations and to establish necessary management measures for their elimination. Most importantly, the usage of molecular-genetic methods enables to detect hybrid individuals of next generations that bear no visible phenotypic signs of previous hybridisation. Mezidruhová hybridizaci mezi nepůvodním jelenem sika a původním jelenem lesním představuje v České republice vážný problém, i když o její existenci se dlouho pochybovalo. Hlavní příčinou nedůvěry v existenci kříženců byl zejména fakt, že až donedávna neexistovala žádná zcela spolehlivá metoda jejich detekce. Aplikování molekulárně-genetických metod, především využití mikrosatelitových markerů, by nám mělo pomoci určit celkový podíl hybridních jedinců v populaci a stanovit příslušná opatření k jejich eliminaci. Právě využití molekulární genetiky totiž umožňuje odhalit i hybridní jedince dalších generací, kteří již navenek nenesou žádné fenotypové znaky po předcházejícím mezidruhovém křížení.
Keywords:
red deer; sika deer; cross-breeding; inter-specific hybridization; Czech Republic
Available at various institutes of the ASCR
Application of genetic methods for the detection of deer origin and existence of interspecific hybridization
Hybridization between native red deer and non-native sika deer is a real threat in the Czech Republic, even though its existence has been questioned for a long time. The main cause of hybrids’ ...
Vzpomínka na prof. Ing. Vlastimila Baruše, DrSc
Peňáz, Milan; Spurný, P.; Prokeš, Miroslav
2014 - Czech
Keywords:
Obituary
Available on request at various institutes of the ASCR
Vzpomínka na prof. Ing. Vlastimila Baruše, DrSc
The structure of zooplankton in diet of common bream (Abramis brama) during biomanipulation
Zapletal, T.; Špaček, J.; Jurajda, Pavel; Všetičková, Lucie
2014 - Czech
The structure of zooplankton in diet of common bream (Abramis brama) was analysed in the Hamry water supply reservoir during the period 2011-2014. Fish were captured by gill netting, beach seining and electrofishing in the littoral part of reservoir. Minimum twenty specimens of each size group were taken for analysis on each sampling occasion. Zooplankton in the diet of adult bream SL 210-315 mm and subadult SL 124-186 mm made recedent proportion. Juvenile bream (0+) SL 18-51 mm consumed zooplankton only. Daphnia galeata was dominant there. We found that decrease of cladoceran communities in the water supply reservoir might to cohere (related) with this specific feeding activity of bream's fry and the feeding competition of bream's and perch's fry in it's habitats.
Keywords:
common bream; biomanipulation
Available on request at various institutes of the ASCR
The structure of zooplankton in diet of common bream (Abramis brama) during biomanipulation
The structure of zooplankton in diet of common bream (Abramis brama) was analysed in the Hamry water supply reservoir during the period 2011-2014. Fish were captured by gill netting, beach seining and ...
Detection of antibodies against tick-borne encephalitis in human sera by screening in neutralization test
Hubálek, Zdeněk
2014 - Czech
Using plaque-reduction neutralization test, we examined blood sera of 704 persons for antibodies against tick-borne encephalitis virus. Specific antibodies were detected in 121 persons. Detailed results were delivered to National Public Health Institute in Prague according to the agreement. Metodou plak-redukčního neutralizačního testu jsme vyšetřili na protilátky k viru klíšťové encefalitidy krevní séra celkem 704 osob. Specifické protilátky jsme zjistili u 123 osob. Detailní výsledky (protokol) jsme předali podle smlouvy na Státní zdravotní ústav v Praze.
Keywords:
tick-borne encephalitis; screening
Available at various institutes of the ASCR
Detection of antibodies against tick-borne encephalitis in human sera by screening in neutralization test
Using plaque-reduction neutralization test, we examined blood sera of 704 persons for antibodies against tick-borne encephalitis virus. Specific antibodies were detected in 121 persons. Detailed ...
Monitoring of large carnivores in SCI Beskydy: summary of recommended measures
Koubek, Petr; Homolka, Miloslav; Krojerová, Jarmila; Barančeková, Miroslava
2014 - Czech
The aim of the project was to evaluate the status of large carnivores' populations (European lynx, wolf, and brown bear) in SCI Beskydy using different monitoring methods. Cílem projektu bylo s použitím různých metod monitoringu zhodnotit stav populací velkých šelem (rys, vlk, medvěd) na území EVL Beskydy a vypracovat doporučení pro jejich ochranu.
Keywords:
large carnivores; Beskydy Mts.
Available at various institutes of the ASCR
Monitoring of large carnivores in SCI Beskydy: summary of recommended measures
The aim of the project was to evaluate the status of large carnivores' populations (European lynx, wolf, and brown bear) in SCI Beskydy using different monitoring methods.
NRGL provides central access to information on grey literature produced in the Czech Republic in the fields of science, research and education. You can find more information about grey literature and NRGL at service web
Send your suggestions and comments to nusl@techlib.cz
Provider
Other bases