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Hybrid zone of fire-bellied toads in South Bohemia
NOWAK, Rudolf
The aim of the diploma thesis was to find out, which of the chosen abiotic and biotic habitat parameters different species and their hybrid groups of European fire-bellied toads prefer. The subject of the thesis was also to revise the already known locations of occurrence and to find new locations in the hybrid zone of Kaplicko and Českobudějovicko. I have monitored four new founded posts and thirteen already known posts in seven locations. I evaluated two posts as ceased, because the pool in such a location has been rebuilt for fish pond management. One location has been degraded by building waste. Another one has ceased to exist because there has been built a new family house at the post. Four posts were regularly without findings because of excessive drought. My monitoring was based on the method of complete capturing and the determination was made on the basis of the pattern of aposematic coloration on the bellies of the caught toads. I also determined the degree of hybridization (hybrid index) according to this pattern. I classified nine posts in five locations in total, of which four of them have been newly found. On the basis of obtained results I decided with the help of the Pearson correlation coefficient some parameters were not confirmative: a perimeter, an area, a depth and vegetation presence. Sun exposure, forest distance and the altitude of the posts showed to be statistically significant.
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Long-term monitoring of the movement and location of individuals yellow-bellied toad (\kur{Bombina variegata})
VOLFOVÁ, Tereza
This thesis contains brief knowledge about homing and migration in amphibians. In practical part this thesis is studied fidelity and movement yellow-bellied toad (Bomnina variegata) in observed lokality. It is maped relative quantity during four seasons. Habitat preferences of yellow-bellied toad are researched depend on chosen paramerts (maximal depth, area, vegetation). This thesis also devote a pattern maps, special technice for marking amphibians. This method was used for marking individuals of yellow-bellied toad in field experiment.
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Individual marking and identification of amphibians
VOLFOVÁ, Tereza
This thesis contains the compilation of marking techniques in amphibians. It compares their advantages and disadvantages based mainly of their application in practice and also the comparison of these methods. The thesis is most focuses on pattern maps method and its application to the amphibian species of Czech Republic. This thesis also contains a test of this method on selected species.
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Hybrid zone of the fire-bellied toads Bombina bombina and B. variegata in southern Bohemia
STRAKOVÁ, Helena
In this paper I focused on the examination of chosen localities inside the hybrid zone of the fire-bellied toads, where the occurrence of these species and their hybrids was confirmed in previous research. The goal is to follow the development of these habitats, suitable for the presence of a threatened species, and trends in quantities of these toads. Another aim was to calculate the hybrid index of each individual based on the ventral spots and so to classify the populations on each locality according to species.
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