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Nonindigenous amphibian and reptile species of the Near and Middle East
Pazderková, Marie ; Šmíd, Jiří (advisor) ; Brejcha, Jindřich (referee)
This literary review summarizes information about twelve reptile and amphibian species, which are nonindigenous for the Near and Middle East. The studied area comprises the following states: Bahrain, Egypt, Iraq, Iran, Israel, Jordan, Qatar, Kuwait, Lebanon, Oman, Yemen, Saudi Arabia, Syria, Turkey, United Arab Emirates, Palestine. Nonindigenous species are introduced to new localities mainly via human causation. It can be either unintentional, such as transportation of the animal along with agricultural crops or exotic plants, or intentional, such as releasing the animal into the wild by breeder. Introduction of nonindigenous species can have unfortunate consequences for the stability of the indigenous ecosystem. From a human point of view, nonindigenous species can negatively affect local agriculture. Key words: Nonindigenous species, invasive species, Near East, Middle East, ecosystem, introduction, reptile, amphibian
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Design of amphibian aircraft based on VUT 001 Marabu
Prokop, Vít ; Weis, Martin (referee) ; Píštěk, Antonín (advisor)
My master´s thesis deals with the design of amphibian hull for VUT 001 Marabu aircraft. Part of this work is aerodynamic and hydrodynamics design of hull including flight mechanics with, take of and landing on the water. The last point of work is load calculation of float and landing gear and design of landing gear retraction mechanics.
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Application of the Reading Comprehension Method in the Teaching of Selected Species of Amphibians at Lower Secondary Education
Korečková, Valentýna ; Andreska, Jan (advisor) ; Hanel, Lubomír (referee)
In my diploma thesis I apply the reading comprehension method in the biology and I focus on selected species of amphibians. Understanding the text is a prerequisite for learning from the text, and it is an important part of understanding the world. This is the reason why I use a multidisciplinary approach and I included reading comprehension methods in the teaching of amphibians in elementary school. In my diploma thesis, I made a research which I examine whether students with learning disabilities will be able to understand the text, or whether they will be more successful in a simpler text supplemented with pictures and graphs. Furthermore, I deal with whether teaching with the application of the reading comprehension method will increase students' interest in the discussed topic and whether these students will be more successful in verifying their knowledge than students who were taught using the frontal method. I have chosen methods to achieve the goals which are: a frontal teaching method, teaching with the application of developing reading comprehension, a test in the form of a questionnaire and a semi-structured interview with pupils. It is a mixed research, where I combine qualitative and quantitative research procedures. This research is implemented at a selected elementary school. The...
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Vliv modelové látky s anti-progestagenní aktivitou na vývoj gonád a štítné žlázy u žáby drápatky vodní (Xenopus laevis)
KARBUSOVÁ, Kateřina
The aim of this bachelor thesis was to assess the effect of the steroid hormone mifepristone, a model substance with anti-progestogenic activity, commonly used in medicine as an abortivum, on gonadal and thyroid development in a model amphibian species, the African clawed frog (Xenopus laevis). African clawed frogs were exposed to three concentrations of mifepristone 2, 22 and 215 ngl-1 from stage Nieuwkoop and Faber (NF) 47-48 until reaching stage NF 66. Mifepristone was dissolved in dimethyl sulfoxide (DMSO). The control group of frogs was kept in pure water with the addition of DMSO solvent at a final concentration of 0.001 %vol.. Images for gonad morphology were taken during dissection sampling at the end of the test (after reaching the juvenile stage). Furthermore, thyroid samples were processed for histological analysis. The thyroid gland on the histological slide was photographed with QuickPHOTO MICRO 3.2 software. Selected parameters were measured on the gonadal and thyroid images using image analysis in the QuickPHOTO MICRO 3.2 software and the effect of mifepristone on gonadal and thyroid development was evaluated. Exposure to mifepristone did not induce pathological changes in gonadal development, nor was intersexuality detected. No significant differences were found between the mifepristone-exposed groups and the control group for any of the parameters studied (gonad length and width, number of melanophores). Based on the observed parameters, we can conclude that mifepristone did not affect the gonadal development of exposed frogs. Histopathological examination of the thyroid gland also revealed no changes. Thyroid development, as assessed by the width of the thyroid follicular epithelium, was also not significantly affected by mifepristone exposure at any of the frog developmental stages studied (NF 58, NF 66). Although no effect of mifepristone on the parameters studied in this thesis was observed until the juvenile stage, it is possible that the effects could be seen in adulthood and further experiments are needed.
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Tailed amphibians (Caudata) in zoos - breeding, rearing, trend analysis
FIALA, Antonín
Amphibians are currently one of the most endangered vertebrate groups. In addition to the well-known factors such as habitat loss, illegal trade or global warming, a rela tively new specific factor is threatening salamanders (Caudata). In recent years, the fungal disease BSAL (Batrachochytrium salamandrivorans) has started to spread not only in Western Europe. The aim of this bachelor thesis is to evaluate the breeding of tailed amphibians in zoos and private breeding, to explore its history and present. The sources are the international database ZIMS, yearbooks of Czech and Slovak zoologi cal gardens and questionnaires distributed among breeders through social networks and in cooperation with AG Urodela. As of the first half of 2023, 801 species of tailed amphibians have been described. Zoos keep 127 species, i.e. 15.9%. According to the findings of my survey, 93 species, i.e. 11.6%, are kept in private breeding.
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Breeding of salamanders in zoological gardens - analysis of trends and success
ONDRÁČEK, Michal
Amphibians are currently the most endangered group of verterbrates living on Earth, with populations in the wild declining rapidly due to pollution and loss of their habitat, trapping of individuals from nature, global climate change and spread of diseases. My work is focused on mapping the situation in tailed amphibians in zoos and aquariums all over the world. Using acces to the database of zoos ZIMS creates an overview of all breed species, institutions, which are engaged in their breeding and their results. An integral part of this work is a literary overview of the history of breeding amphibians in zoos, their protection and current ex situ projects.
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