Ano (214)
Počet nalezených dokumentů:
214
Publikováno od
do
Natural peat bog regenaration
MACH, Jiří
2008 - anglický
Plné texty jsou dostupné v digitálním repozitáři JČU.
Natural peat bog regenaration
Diurnal behavior and habitat preferences of Erebia aethiops, an aberrant lowland species of a mountain butterfly clade
KLEČKOVÁ, Irena
2012 - anglický
Okáč kluběnkový Erebia aethiops se výskytem v nížinách odlišuje od ostatních zástupců motýlů rodu Erebia obývajících převážně chladné horské a arktické oblasti. Jedná se o ohrožený druh lesních lemů a řídkých lesů. V naší práci jsme použili údaje o chování E. aethiops získané během mark-recapture (MR) studie k zjištění denní a sezónní aktivity. Tyto poznatky byly porovnány s informacemi o horských zástupcích rodu. Stejně jako horští zástupci, trávil E. aethiops s postupující sezónou více času udržovacími aktivitami (sání, slunění). Narozdíl od horských zástupců, ale sál spíše v ranních hodinách a nejteplejší části dne strávil ve stínu. Vysoké teploty tedy limitovaly chování E. aethiops spíše než nízké teploty. Dále jsme srovnávali mikrohabitatové preference samců a samic ? samice preferovaly spíše travnatá místa, naopak samci často vlétali mezi keře a do řídkého lesa. Naše studie ilustruje využitelnost MR dat k analýze chování a aktivity motýlů a zároveň poukazuje na to, že pro přežití E. aethiops je nezbytná existence jemně strukturované mozaiky biotopů. Erebia aethiops is an aberrant lowland representative of a predominately arctic and alpine butterfly genus. The study illustrates the utility of auxiliary mark-recapture data to analyze butterfly diurnal and within season activity, provides comparison of the E. aethiops activity with previously studied mountain Erebia species and points to the necessity of finely structured habitat mosaics for E. aethiops, an open woodland species that retracted to abandoned grasslands and has become vulnerable in Central Europ
Klíčová slova:
denní aktivita motýlů; biotopové preference; sezóna; teplota
Plné texty jsou dostupné v digitálním repozitáři JČU.
Diurnal behavior and habitat preferences of Erebia aethiops, an aberrant lowland species of a mountain butterfly clade
Okáč kluběnkový Erebia aethiops se výskytem v nížinách odlišuje od ostatních zástupců motýlů rodu Erebia obývajících převážně chladné horské a arktické oblasti. Jedná se o ohrožený druh lesních lemů a ...
Relation of Pleurocapsa cuprea Hansgirg to the genus Hildenbrandia (Rhodophyta)
CAISOVÁ, Lenka
2011 - anglický
Pleurocapsa cuprea has been originally described as a relatively common freshwater cyanobacteial species with specific habitat preferences. Due to the striking resemblance of some diagnostic features to the red algal genus Hildenbrandia, morphological, molecular as well as pigment analyses have been done to either confirm or disprove the relationship of Pleurocapsa cuprea to the Cyanobacteria. Pleurocapsa cuprea has been originally described as a relatively common freshwater cyanobacteial species with specific habitat preferences. Due to the striking resemblance of some diagnostic features to the red algal genus Hildenbrandia, morphological, molecular as well as pigment analyses have been done to either confirm or disprove the relationship of Pleurocapsa cuprea to the Cyanobacteria.
Plné texty jsou dostupné v digitálním repozitáři JČU.
Relation of Pleurocapsa cuprea Hansgirg to the genus Hildenbrandia (Rhodophyta)
Pleurocapsa cuprea has been originally described as a relatively common freshwater cyanobacteial species with specific habitat preferences. Due to the striking resemblance of some diagnostic features ...
Larval and adult seed consumption affected by the degree of food specialization in Amara (Coleoptera: Carabidae)
KLIMEŠ, Petr
2011 - anglický
Tato studie vůbec poprvé kvantifikuje spotřebu semen střevlíkovitými brouky, jak pro všechny larvální instary, tak jejich dospělce. Tři druhy střevlíků z rodu Amara byly vybrány jako modelové druhy a konzumace semen tří druhů rostlin Stellaria media, Capsella bursa-pastoris and Taraxacum officinale byla testována v laboratorních experimentech. Larvy vykazovaly obecně větší specializovanost a porovnatelnou nebo dokonce vyšší denní spotřebu semen než imaga. Výsledky tak zdůrazňují velký výzman nejen imag, ale také jejich larev, jako potenciálních predátorů semen v přírodě. This is the first study in which seed consumption is assessed for all larval instars and adults of ground beetles. Three species of the genus Amara were examined. Larvae of all three instars and adults were fed seeds of three plant species Stellaria media, Capsella bursa-pastoris and Taraxacum officinale in a laboratory no-choice experiment. In general, larvae showed greater food specialization and the daily specific seed consumption was comparable or even higher in larval than in adult stage. Results suggest that also carabid larvae may be very important consumers of weed seed in the field.
Klíčová slova:
Dieta; potravní ekologie; střevlíkovití brouci; larvy; predace semen; semena plevelů.
Plné texty jsou dostupné v digitálním repozitáři JČU.
Larval and adult seed consumption affected by the degree of food specialization in Amara (Coleoptera: Carabidae)
Tato studie vůbec poprvé kvantifikuje spotřebu semen střevlíkovitými brouky, jak pro všechny larvální instary, tak jejich dospělce. Tři druhy střevlíků z rodu Amara byly vybrány jako modelové druhy a ...
Food selection in Microtus arvalis: the role of plant functional traits
LANTOVÁ, Petra
2011 - anglický
Foraging by captive common voles (Microtus arvalis) was evaluated by measuring the biomass of plant species consumed in a vivaria experiment and by re-analysing of already published data on plant selection. The experiment showed that foraging was strongly plant species-specific, while data re-analysis indicated the traits plant guild and life span as the best predictors for dietary selection, i.e., voles would eat more grasses and/or legumes than forbs. The study suggests that the voles usually consume grasses in the field because grasses are abundant and readily available, but prefer protein-rich forbs when possible. Foraging by captive common voles (Microtus arvalis) was evaluated by measuring the biomass of plant species consumed in a vivaria experiment and by re-analysing of already published data on plant selection. The experiment showed that foraging was strongly plant species-specific, while data re-analysis indicated the traits plant guild and life span as the best predictors for dietary selection, i.e., voles would eat more grasses and/or legumes than forbs. The study suggests that the voles usually consume grasses in the field because grasses are abundant and readily available, but prefer protein-rich forbs when possible.
Klíčová slova:
Common vole; Electivity index; Selective feeding; Plant functional groups; Plant traits
Plné texty jsou dostupné v digitálním repozitáři JČU.
Food selection in Microtus arvalis: the role of plant functional traits
Foraging by captive common voles (Microtus arvalis) was evaluated by measuring the biomass of plant species consumed in a vivaria experiment and by re-analysing of already published data on plant ...
Der-p2 (Dermatophagoides pteronyssinus) allergen-like protein from the hard tick Ixodes ricinus - a novel member of ML (MD-2-related lipid-recognition) domain protein family.
PLCHOVÁ, Jana
2012 - anglický
A family of ML (MD-2-related lipid-recognition) domain containing proteins contains immune-related molecules. It does not belong among well-studied protein family in ticks although its occurence is quite often. Generally, ML proteins are involved in innate immunity processes, lipid binding and transport. A novel member of the ML protein family, Der-p2 allergen-like protein was isolated from Ixodes ricinus and characterized for the first time. A family of ML (MD-2-related lipid-recognition) domain containing proteins contains immune-related molecules. It does not belong among well-studied protein family in ticks although its occurence is quite often. Generally, ML proteins are involved in innate immunity processes, lipid binding and transport. A novel member of the ML protein family, Der-p2 allergen-like protein was isolated from Ixodes ricinus and characterized for the first time.
Klíčová slova:
tick; Ixodes ricinus; ML protein family; allergen-like protein
Plné texty jsou dostupné v digitálním repozitáři JČU.
Der-p2 (Dermatophagoides pteronyssinus) allergen-like protein from the hard tick Ixodes ricinus - a novel member of ML (MD-2-related lipid-recognition) domain protein family.
A family of ML (MD-2-related lipid-recognition) domain containing proteins contains immune-related molecules. It does not belong among well-studied protein family in ticks although its occurence is ...
Alcathoe bat (Myotis alcathoe) in the Czech Republic: distributional status, roosting and feeding ecology
LUČAN, Radek
2010 - anglický
Between 2001 and 2008, we recorded Myotis alcathoe at nine sites within three distant areas in the Czech Republic. The species identification was confirmed with cyt b sequences and four distinct haplotypes were identified. All the localities exhibit surprisingly uniform habitat characteristics: (1) old full-grown oak-hornbeam forests, with (2) numerous large trees in advanced stages of decay are present, and (3) a very small to large water bodies and/or patches of riparian vegetation surrounded by the forest. Using radiotracking techniques, we discovered 27 day roosts of M. alcathoe, located mostly in big oak, birch and lime trees inside extensive forest stands. All roosts were fissures or small cavities in a tree trunk and in branches in the canopies, some 16 m above the ground. Bats preferred trees that were higher, had higher canopy and canopy basement and had larger diameter at breast height than other available trees. Roost trees were surrounded by lower trees with lower canopy basements than available trees. Roost trees were in a poorer condition than other available trees. Roosts were occupied by up to 83 individuals in July but usually single individuals were found in the roosts in September. In contrast to syntopic M. mystacinus and M. brandtii, M. alcathoe has never been found in an anthropogenic roost (except for a fissure in concrete electricity pole). Preliminary analysis of the diet showed that nematoceran flies were the most important prey item along with spiders, caddis flies, small moths and neuropterans. In the observed ecological characteristics, M. alcathoe markedly differs from other European species of the genus Myotis. Its restricted habitat requirements are perhaps responsible for an islet-like pattern of its distribution and suggest an essential conservation value of the habitats of its occurrence. Between 2001 and 2008, we recorded Myotis alcathoe at nine sites within three distant areas in the Czech Republic. The species identification was confirmed with cyt b sequences and four distinct haplotypes were identified. All the localities exhibit surprisingly uniform habitat characteristics: (1) old full-grown oak-hornbeam forests, with (2) numerous large trees in advanced stages of decay are present, and (3) a very small to large water bodies and/or patches of riparian vegetation surrounded by the forest. Using radiotracking techniques, we discovered 27 day roosts of M. alcathoe, located mostly in big oak, birch and lime trees inside extensive forest stands. All roosts were fissures or small cavities in a tree trunk and in branches in the canopies, some 16 m above the ground. Bats preferred trees that were higher, had higher canopy and canopy basement and had larger diameter at breast height than other available trees. Roost trees were surrounded by lower trees with lower canopy basements than available trees. Roost trees were in a poorer condition than other available trees. Roosts were occupied by up to 83 individuals in July but usually single individuals were found in the roosts in September. In contrast to syntopic M. mystacinus and M. brandtii, M. alcathoe has never been found in an anthropogenic roost (except for a fissure in concrete electricity pole). Preliminary analysis of the diet showed that nematoceran flies were the most important prey item along with spiders, caddis flies, small moths and neuropterans. In the observed ecological characteristics, M. alcathoe markedly differs from other European species of the genus Myotis. Its restricted habitat requirements are perhaps responsible for an islet-like pattern of its distribution and suggest an essential conservation value of the habitats of its occurrence.
Klíčová slova:
radio tracking; diet analysis; tree roosts; forest bats; Myotis alcathoe
Plné texty jsou dostupné v digitálním repozitáři JČU.
Alcathoe bat (Myotis alcathoe) in the Czech Republic: distributional status, roosting and feeding ecology
Between 2001 and 2008, we recorded Myotis alcathoe at nine sites within three distant areas in the Czech Republic. The species identification was confirmed with cyt b sequences and four distinct ...
Demography of a large and common butterfly: Argynnis aglaja (Lepidoptera, Nymphalidae) studied by mark-recapture
ZIMMERMANN, Kamil
2011 - anglický
Populační struktura, demografické parametry, mobilita a chování perlrťovce velkého (Argynnis aglaja) byly studovány na tradičně obhospodařovaných, polopřirozených podhorských loukách, za účelem objasnění relativní úspěšnosti přežívání tohoto druhu, při porovnání s ostatními druhy sdílejícími stejný biotop. The population structure, demography parameters, dispersal and behaviour of the Dark Green Fritillary (Argynnis aglaja) butterfly were studied on the traditionaly managed submontane seminatural grasslands, in order to elucidate the relatively successful persistence of this species, if compared with other butterflies sharing the same habitat.
Klíčová slova:
ekologie motýlů; ochrana; luční porosty; mark-recapture; velikost populace; mobilita
Plné texty jsou dostupné v digitálním repozitáři JČU.
Demography of a large and common butterfly: Argynnis aglaja (Lepidoptera, Nymphalidae) studied by mark-recapture
Populační struktura, demografické parametry, mobilita a chování perlrťovce velkého (Argynnis aglaja) byly studovány na tradičně obhospodařovaných, polopřirozených podhorských loukách, za účelem ...
Effects of hydropeaking on the attached eggs of a rheophilic cyprinid species
BARTOŇ, Daniel
2023 - anglický
Ability of eggs of asp (Leuciscus aspius) to survive an increased water velocity was tested in experimental condition as well as in situ. Hydropeaking occurs on the study site and can cause detachment of most spawned eggs.
Klíčová slova:
fish reproduction; Leuciscus aspius; wildlife conservation; river ecology; habitat alternation
Plné texty jsou dostupné v digitálním repozitáři JČU.
Effects of hydropeaking on the attached eggs of a rheophilic cyprinid species
Ability of eggs of asp (Leuciscus aspius) to survive an increased water velocity was tested in experimental condition as well as in situ. Hydropeaking occurs on the study site and can cause detachment ...
The Proteocephalus species-aggregate in freshwater centrarchid and percid fishes of the Neartic Region (North America)
UHROVÁ, Lucie
2019 - anglický
In the present paper, three species of the Proteocephalus-aggregate de Chambrier, Zehnder, Vaucher and Mariaux, 2004 (Cestoda: Proteocephalidae) from centrarchid and percid fishes from North America are reviewed and recognized as a valid: (1) Proteocephalus fluviatilis Bangham, 1925, (2) Proteocephalus luciopercae Wardle, 1932, (3) Proteocephalus pearsei La Rue, 1919 and additionaly Proteocephalus ambloplitis (Leidy, 1887), which does not belong to this Proteocephalus aggregate, is provided for the first time. Moreover, molecular analysis of the contatenated (28S rDNA+COI) dataset of Proteocephalus-aggregate species is presented. In the present paper, three species of the Proteocephalus-aggregate de Chambrier, Zehnder, Vaucher and Mariaux, 2004 (Cestoda: Proteocephalidae) from centrarchid and percid fishes from North America are reviewed and recognized as a valid: (1) Proteocephalus fluviatilis Bangham, 1925, (2) Proteocephalus luciopercae Wardle, 1932, (3) Proteocephalus pearsei La Rue, 1919 and additionaly Proteocephalus ambloplitis (Leidy, 1887), which does not belong to this Proteocephalus aggregate, is provided for the first time. Moreover, molecular analysis of the contatenated (28S rDNA+COI) dataset of Proteocephalus-aggregate species is presented.
Klíčová slova:
Cestoda; Proteocephalidea; Proteocephalus-aggregate
Plné texty jsou dostupné v digitálním repozitáři JČU.
The Proteocephalus species-aggregate in freshwater centrarchid and percid fishes of the Neartic Region (North America)
In the present paper, three species of the Proteocephalus-aggregate de Chambrier, Zehnder, Vaucher and Mariaux, 2004 (Cestoda: Proteocephalidae) from centrarchid and percid fishes from North America ...
NUŠL poskytuje centrální přístup k informacím o šedé literatuře vznikající v ČR v oblastech vědy, výzkumu a vzdělávání. Více informací o šedé literatuře a NUŠL najdete na webu služby.
Vaše náměty a připomínky posílejte na email nusl@techlib.cz
Provozovatel
Zahraniční báze