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Association between louse abundance and MHC II supertypes in Galápagos mockingbirds
VLČEK, Jakub
In this thesis I describe association between abundance of ectoparasitic lice and supertypes of major histocompatibility complex in mockingbirds of Galápagos islands. I report a significant association between several supertypes and the lice abundance. Lice abundance was correlated also with heterocyte to lymphocyte ratio, an immunogenetic index reflecting rate of immune stress. This scientific contribution is valuable, because ectoparasite abundance in birds was rarely contrasted to MHC and other immune indices.
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Conservation genetics of Galápagos mockingbirds: from immune genes to genomes
VLČEK, Jakub
In this thesis I have dealt with the population genetic processes of mockingbirds in the Galápagos Islands ( Mimus ) in relation to the limited island area, from the perspective of two types of immune genes and the genome-wide approach. The thesis starts with an introduction to population genetic concepts relevant to conservation genetics followed by description of immune genes: the major histocompatibility complex (MHC) and the Toll-like receptors (TLR). In the final part of the introduction, I address how genetic drift, selection and inbreeding shape genome-wide genetic patterns in small populations. The introduction is followed by four chapters, beginning with an examination of MHCII polymorphism in populations of mockingbirds in the Galápagos Islands. The study of the relationship between MHCII and the abundance of ectoparasites is the content of the second chapter. The third chapter shows how polymorphism of TLRs is shaped by interaction of genetic drift and natural selection. The last chapter deals with the effects of limited island size on inbreeding and genetic load, supported by inferences of the past demography of mockingbirds. The thesis concludes with a summary of the results and their potential implications in the field of conservation genetics.
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Recognition and Filtration of Unwanted Video-Sequences
Vlček, Jakub ; Surynek, Pavel (advisor) ; Kolomazník, Jan (referee)
The thesis deals with the possibilities of recognition video sequences and possibility of machine learning based on previous knowledge. I use neural networks which I learn on characteristics generated from images. Images are characterized using image functions like histogram and statistical functions such as mean and correlations to detect scenes in video-sequence. I used all of these findings to implement the demonstration program. The program can play video, display statistical information about the sequence or frame by frame and detect sequences similar to advertisements on the basis of statistical properties and respond to it by defined events.
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Využití ozónu v intenzivním chovu vybraných druhů ryb
VLČEK, Jakub
Aim of this thesis was to use the ozonisation as a disinfection method for improving of water quality in the intensive fish farms using RAS (recirculating aquaculture system). The main assessed parameter was effect of ozone treatment on fish health and RAS functions and features. Two RAS were used in this study one with use of ozone treatment, one without ozone treatment (control system). There were cultured two different fish species in these two RAS - pikeperch (Sander lucioperca) and European catfish (Silurus glanis). The main reason for use of these two species is that they are perspective species for intensive aquaculture. In the RAS with ozone treatment, two different methods of ozone application were tested - periodical and continual application. The effect of ozone treatment on fish health and conditions was controlled regularly. Ozone treatment had positively affected the survival of both cultured species (pikeperch survival: with ozone = 77.0 % and without ozone = 67.2 %; European catfish: with ozone = 93.1 % and without ozone = 91.5 %). Ozone treatment also positively affected the water chemistry. The greatest difference was observed in CHSKMn: with ozone = 6.4?1.2 mg.l; without ozone = 10.7?1.6 mg.l. The same features were observed in suspended solids: with ozone = 4.3?2.8 mg.l-1; without ozone = 8.17?6.2 mg.l. Appearance of Ichthyophthirius multifiliis and bacterial infection were not affected by ozone treatment. The main result of this thesis and this design of experiment is that ozone treatment had a positive impact on water chemistry in observed RAS and it, however, didn't kill 100% of the fish pathogens.
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Lease of a house
Vlček, Jakub ; Salač, Josef (advisor) ; Švestka, Jiří (referee)
The Abstract The aim of my diploma thesis was to describe the legal regulation of renting a house, which serves a renter to provide housing needs. Given the fact that renting a house is also under the protection of the rental housing from 1st January 2014, this is a topical topic. The diploma thesis is divided into Introduction, Conclusion and five main chapters, which are further divided into subchapters. The thesis is based on legal regulations and, where necessary, supplemented by case law. In the first chapter I deal with the historical development of rental housing from the period of the Roman Empire through the Middle Ages to the period of the force of the ABGB to the period after 1989. At the beginning of the second chapter I explain the difference between rent and tenure, but the key topic is renting a house and its origination with emphasis on the creation of a house lease under a contract. In the third chapter, I discuss rents, including detailed handling of rental issues, and other payments associated with renting a house, such as housekeeping and security. The fourth chapter is the most extensive and consists of the rights and obligations of the lessee and the lessor arising from the rental relationship. These are, in particular, the most essential and fundamental rights and obligations in the...
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Recognition and Filtration of Unwanted Video-Sequences
Vlček, Jakub ; Surynek, Pavel (advisor) ; Kolomazník, Jan (referee)
The thesis deals with the possibilities of recognition video sequences and possibility of machine learning based on previous knowledge. I use neural networks which I learn on characteristics generated from images. Images are characterized using image functions like histogram and statistical functions such as mean and correlations to detect scenes in video-sequence. I used all of these findings to implement the demonstration program. The program can play video, display statistical information about the sequence or frame by frame and detect sequences similar to advertisements on the basis of statistical properties and respond to it by defined events.
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Analysis of the Supply Chain in the company FrostFood a.s.
Vlček, Jakub ; Vinš, Marek (advisor) ; Machová, Jana (referee)
The Master's thesis discusses an analyst of supply chain at Frostfood a.s. The aim is to descibe the entire logistics chain , except production, and propose solutions to the current situation. The thesis is divided into theoretical and practical parts. The theoretical part describes basic concepts such as logistics, warehousing, distribution, etc. In the practical part introduces the company and its impact on various markets. The most important part is analysis of the actual logistics chain, finding weaknesses and propose solutions.
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Induction and optimalization out-of-season spawning of spawners pikeperch (Sander lucioperca)
VLČEK, Jakub
In total, 21 pairs of pikeperch brood stock were divided into three groups and used during two out-of-season and one seasonal semi-artificial spawning. The only differences among these three groups were the length of cold water period (CWP) and spawning date. Group of earlier spawning (A) CWP = 122 days, Group of normal spawning (B) CWP = 149 days, Group of late spawning (C) CWP = 223 days). Dates of spawnings A 11.3., B 26.4., C 13.6). There were observed and assessed the main production parameters such us latency, successful spawning, fertilisation and hatching rate etc. in each group and spermatozoa quality (sampled one day after the observed spawning). In Group A and B, 100 % of fish successfully spawned. Fertilisation rate was 59.4 % (Group A) and 80.3 % (Group B). Much worse results were obtained in Group C. Only 42.9 % of fish spawned and the fertilisation rate was zero. There was no difference among the three groups in spermatozoa quality parameters. It means that the poor fertilisation rate in Group C was caused by low egg quality. According to our results we can say that it is possible to successfully spawn pikeperch earlier (before the main spawning season) with comparable result to the natural spawning season. However, it is necessary to find some better way for female stimulation to provide higher egg quality and subsequently higher fertilisation rate.
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