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Bird Appearances and Similarities
Figura, Roman ; Komárek, Stanislav (advisor) ; Daněk, Tomáš (referee) ; Jaroš, Filip (referee)
The presented work deals with a striking, yet usually neglected phenomenon by researchers, the similarity between the forms of different (closely unrelated) bird taxa. It mainly concerns visual signs of the body surface, the work also deals with other signs, including behavioral ones. The thesis demonstrates that these are not a few curious similarities, but a truly robust phenomenon, which apparently cannot be fully explained from a unifying point of view. Only some characters, which the work deals with, help their bearers to crypsis, aposematism or mimesis. In many other cases, their function is unknown. They can carry different functions in the life of their bearers, but it is often not possible to determine a single cause of their occurrence. In terms of the information contained, the work belongs to the largest works dealing with this topic known to the author.
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The Contribution of Oskar Heiroth to the Formation of Classical German Ethology
Bradáč, Ondřej ; Komárek, Stanislav (advisor) ; Hermann, Tomáš (referee)
Oskar Heinroth was a German zoologist and is frequently considered as the founder of ethology. Thanks to his lifetime observing of animals, especially birds, made he the conclusion that movement, display of behavior and other signs which haven't been taken into account until his days are equally important for the right animal classification as morphology. He is a discoverer of species typical instinctive behavior and he observed as the first one several other ethological phenomenons as imprinting, drop-off of the treshold value of the signal or idle-running reactions. He iniciated a more pragmatic sight into animal psychics and laid foundations of ethological methodics. Thanks to his publication a darwinistic attitude got access into psychological sciences. Regarding his evidence Konrad Lorenz, Erich von Holst and Nicholas Tinbergen constituted ethology as integrated science, which has later been confirmed on the premisies of universities.
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Birdwatchers: Amateur ornithologists
Křížková, Barbora ; Rynda, Ivan (advisor) ; Šaj, Petr (referee)
The thesis is devoted to amateur ornithologists and their role in citizen science. In it's theoretical part it focuses mainly on citizen science, its features, history and present of ornithology and characterization of amateur ornithologist. The empirical part uses methods of qualitative research, which is based on semi-structured interviews with professional and amateur ornithologists who participate or deal with projects of citizen science. The research problem is formulated as follows: Amateur ornithologists, their role and involvement in civil science and cooperation with professional ornithologists from the perspective of both amateur and professional ornithologists. It uses a thematic analysis to process the interviews on which several topics are based, for example: amateur ornithologist and its concept, relationships between amateur and professional ornithologists and their cooperation, relationship of amateur ornithologists to nature, their self-education, citizen science from the perspective of amateur and professional ornithologists, data and their quality. Research suggests that the difference between amateurs and professionals lies mainly in their relationship to science, which affects other aspects of their relationship to each other and to citizen science.
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