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Variability of Ephemeroptera of family Baetidae (Insecta, Ephemeroptera, Baetidae)
KOLLROSS, Jan
This thesis deals with a variability of the Baetis fuscatus species-group (Ephemeroptera: Baetidae). This study contains three main topics: The first one is distinguishing between two highly similar species, Baetis scambus and Baetis fuscatus based on morfological structures, specifically their mouthparts - labial palps. To analyze the shape of the labial palps, I applied a computerized outline analysis. Second topic is focused on the validity of Baetis beskidensis as a distinct species based on the morphology and DNA sequences (obtained for the topotypical material for the first time). And finally, I also investigated some samples from Corsica in attempt to discover new species of the Baetis fuscatus species-group. I found that most probably it is not possible to distinguish between Baetis scambus and Baetis fuscatus based on the shape of their labial palps. Baetis beskidensis is morfologically different, but genetically not distinctly separated from other representatives of the Baetis fuscatus species-group. I didn´t discover any distinct morphological differences in specimens from Corsica, pointing to the possible existence of new species.
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Pomological evaluation of peach and nectarine varieties promising from commercial growing point of view
Jababu, Nambe
According FAO data, peach production in Czech Republic has been very low, for the past two decades averages production has been around 2000 tonnes; whilst consumption for the same period keeps growing; like in the case of most fruit. To be able to bridge the gap between production and consumption, and of course to also increase the income of the local producers, this research was carried out to evaluate some selected peach and nectarine cultivars on the Experimental Orchard (Lednice, south Moravia, Czech republic) of the Faculty of Horticulture of The Mendel University, in 2013, to select and recommend cultivars that will suit and boost productivity of the local growers in Czech Republic. 36 cultivars and 24 parameters were evaluated. Traits and parameters for evaluation were chosen according to the Peach Descriptors for Variability (Nitransky, Holubec, 1992). Evaluations, was done with 3fruits randomly selected from each cultivar. Statistical analysis was done with the software Statistica 12 with Tukey HSD test. 8 cultivars were recommended at the end of the experiment.
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Variabilita polymorfizmu v genu FABP3 a jeho asociace s ukazateli kvality masa u prasat
Boleslavová, Štěpánka
The aim of the study was to study the variability of the gene in the population FABP3 pig breed Czech large white. Analyze their association with indicators of pork production. Gene FABP3 belonging to multigene families FABP (fatty acid binding proteins affecting the transport of long chain fatty acids). Analyzed polymorphism was at position X98558:g.1321G>C in the 5'UTR region. The relative frequencies of genotypes were: HH = 0,87, Hh = 0,13. hh genotype was not detected in the monitored individuals. The values of the relative frequencies of alleles were as follows: H = 0,93 h = 0,07. Based on the association analysis showed a statistically significant difference between genotypes for stearic acid and linoleic acid. Highly statistically significant difference was observed with palmitic acid.
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Growth and individual variability of the water scorpion Nepa cinerea (Heteroptera: Nepomorpha: Nepidae)
VILIMOVSKÁ, Lenka
It this study morphometric characteristics and the growth of univoltine predatory water scorpion - Nepa cinerea were studied on the basis of data measured on freshly killed individuals, the same ethanol - fixed individuals and dried individuals. The growth of this species has an exponential character. By comparing the morphometric characteristics of freshly killed and fixed individuals was found that the ethanol fixation influenced mainly weight of all developmental stages and total abdominal ventral length of adults. The same was found for the comparison of morphometric characteristics of freshly killed individuals and dried individuals. Other studied dimensions were not significantly deformed even by fixation or drying. Reducing of individula demensions by the influence of fixation and drying was uneven at different developmental stages. Reliable dimension for differentiating of individual developmental stages fixed material and the collected dried material is especially the media length of the body. Dimensions of fixed individuals and dried individuals is not significantly different from dimensions of freshly killed individuals. This project was supported by grant GA CR P505/10/0096.
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The influence of the fixation of water bugs (Heteroptera: Nepomorpha) on the results of their growth and variability
SVOBODOVÁ, Kristýna
The main task of this thesis was to investigate the influence of the preservation by ethyl alcohol and dry mounting on the morphometric characteristics of water bugs´ and to test the hypothesis that live individuals and individuals preserved by ethyl alcohol and dry mounted (both groups deal with individuals of the same species, sex and developmental stage) have the same morphometric parameters. The next task was to determine the effect of preparation by ethyl alcohol and dry mounting on the change of weight caused by different way of individuals´ preparation. Two model species of water bugs were chosen for this study: creeping water bug Ilyocoris cimicoides (Naucoridae) and backswimmer Notonecta glauca (Notonectidae). Weight and twelve other morphometric body characters were measured in adults of both sexes of both species. All data and their differences were tested by Student's paired t-test or nonparametric Wilcoxon test. The level of significance p = 0,05 was used for the decision whether the difference before and after preservation by ethyl alcohol and dry mounting is or is not statistically significant. Both preservation by ethyl alcohol and dry mounting influence only the body weight of treated individuals. Other morphometric characters are more or less independent on the way of preservation of water bugs´ individuals in collections. In this work, we also tested the effect of the Dyar rule for the increase in weight and size between different developmental stages of both species studied. Dyar rule for the evolution of both species was not verified. This project was supported by the grant of the Grant Agency of the Czech Republic No. P505/10/0096.
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Net inventory investment and its importance in business cycle
Kučera, Lukáš ; Mirvald, Michal (advisor) ; Chytilová, Helena (referee)
Cyclical component of aggregate net inventory investment in Czech republic between I.quarter 1996 and IV.quarter 2010 can be described by Production smoothing model, which says, that it is more advantageous for firms to absorb shocks of their product demand into inventories than to adjust their production permanently. This statement stands on a discovery, that cyclical component of net inventory investment is negativelly corralated with cyclical component of final sales and at the same time variability of cyclical component of final sales is higher than cyclical component of production (GDP). Although it is not possible to expect that every firm in the economy will behave according to this model, it seems, with respect to the analysis, that the cost of adjustment is one of the most important factors considered by firms within their optimalization problem.
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