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Aktivita raka mramorovaného v závislosti na reprodukčním cyklu
MARKOVÁ, Kateřina
The aim of this thesis was to elaborate a literature review on the topic of crayfish activity, in particular their feeding activity and the use of shelters, including an emphasis on the role of sex and the reproductive cycle. I also focused on the characteristics of the marbled crayfish, Procambarus virginalis Lyko, 2017 and its usability as a model organism. The experimental part of the thesis focused on comparing three groups of female marbled crayfish (with ovulum, with glair glands and without ovulum). Experiments have been carried out using a method for ecological assessment of feeding behavior and predator-prey relationship in various prey densities in the form of larvae of buzzer midge Chironomus plumosus (Linnaeus, 1758) by functional response analysis and subsequently tested for the effect of shelter presence at uniform prey densities levels. In our experiment, all three groups of tested females showed a type II functional response typical of predators. The results indicate that females without ovulum have been the most active in terms of food collection in all cases, with a generally positive effect of the presence of shelter. Females with employed ovulum are generally less active in terms of consumption, processing and overall aktivity due to hormonal, physiological and consequently behavioural changes. Females with glair glands behaved similarly to females with ovulum in our experiments, being more cautious and less active than females without ovulum. This was probably due to their increased gonadosomatic index (GSI) and, conversely, their decreased hepatopankreas to total body weight ratio, which renders these females unable to physiologically ingest large amounts of submitted food. Female GSI decreases again after ovulation, nevertheless, even females with already employed ovulum did not consume more food, as females prefer safety at this stage of the reproductive cycle. They are less active, move more slowly, spend more time in a shelter, tend to their eggs, and thus cannot devote themselves fully to hunting and prey processing. Regarding its life strategy, the marbled crayfish is a generally suitable model organism for use in various areas of research, however, it is important to take into account its rapid life and reproductive cycle and adapt the conditions of the given experiments to this fact, as the parallel use of female marbled crayfish at various stages of the reproductive cycle can modulate results in terms of their activity. Certain differences in the presented results may also be due to the origin of the experimental animals, as with very few exceptions all performed experiments with marbled crayfish have been carried out using laboratory individuals. A number of conditions that change seasonally in nature have been kept constant in the laboratory. Therefore, it is important to keep in mind that in wild, crayfish are also exposed to both biotic (predation pressure of various species of fish, birds or mammals) and abiotic (changes in temperature and water chemistry) factors that can influence food activity. Nevertheless, we assume that the patterns observed here will also be valid for female crayfish living in the wild nature. However, the lack of similar experiments leading to the elucidation of female activity depending on the stage of the reproductive cycle provides a room to investigate other, not just crayfish species.
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Sacral buildings of the Buquoy family and animation activities connected with them
DOPITOVÁ, Anna - Tereza
The bachelor's thesis aims to introduce the Buquoy family, some of its representatives and the sacral buildings with which they are connected. The work is divided into two parts. The theoretical part is devoted to the history of Buquoy family, the description of selected sacred buildings and the illumination of pedagogical terms such as education, animation or activation in connection with seniors placed in social residential facilities. The practical part represents a created activity on the topic discussed in the theoretical part, which was carried out in the selected facility.
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Analysis of the Company Financial Situation and Proposals of its Improvement
Šmídová, Radka ; Veselíková, Eva (referee) ; Zeman, Václav (advisor)
The goal of this thesis is appreciation financial health of chosen company based on the analysis of financial statements. The thesis includes theoretic and practical part. Theoretic part is intent on description methods financial analysis. In practical parts is given to theory apply to company SATT Inc. At the close thesis are mentioned record financial analysis benchmarking summary and proposals that the firm in years to come will help improve pertinent bad financial situation.
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Financial Analysis of the Selected Firm
Frej, Jan ; Srba, Lukáš (referee) ; Pernica, Martin (advisor)
This thesis focuses on the evaluation of the selected company’s financial situation in the years 2007 - 2011. It details methods of financial analysis and their application in the selected company, assesses individual indicators and identifies shortcomings. Based on these findings, there are proposed measures in area of outstandings and liabilities, liquidity, productivity and profitability that will lead to rectification of deficiencies and preservation of financial stability and the financial health of the company.
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