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The ecological and ethological significance of felid coat patterns (Felidae)
Jaroš, Filip ; Komárek, Stanislav (advisor) ; Horáček, Ivan (referee) ; Weber, Andreas (referee)
The presented work investigates various theories about the significance of felid coat patterns. Most of the hypotheses are based on the theory of adaptive function of animal colouration. As regards felids, it is generally believed that the coat pattern has the function of aggressive resemblance. Early testimonies about cryptic properties of colouration of cats are summarized to provide the historical perspective of the problem. Other putative adaptive functions of patterns are investigated (intraspecific communication, thermoregulation) and close attention is paid to the option that the spotted coat of the leopard (Panthera pardus) serves as a cue for recognition from the perspective of prey. In the next stage, some of the hypotheses are tested by statistical means. The problem is simplified into search for association between a given category of a coat pattern (e.g. spots, stripes) and usual habitat of felid species (e.g. forest, grassland). Pagel's test for correlated changes is employed to account for phylogenetic relationships. In addition to broadly acknowledged hypotheses, the validity of proposition that juvenile coat patterns have the function of protective resemblance is tested. Finally, the problem of colouration of felids is linked to broader context of theoretical biology. Apart from prevailing...
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Geny zbarvení a jejich variabilita u laboratorních potkanů
Čermáková, Kristýna
I dealt with evolution of laboratory rat and its importance in scientific and researcher area in this work. Than I focused on genome, which is described here. Main purpose of this work was molecular characteristic of genes which affect coloring of rats. Colours are divided to the two main categories, first one are agouti colour and second one are non-agouti colours. ASIP (agouti signal peptide) affects coat colour of rat (if it will be agouti or not). So this is main gene in coat colour of rats area, I used this gen as example in testing of polymorphism.
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Genetická determinace výskytu skrvnitosti u psů
Košková, Marie
The domestication and subsequent breeding preceded the formation of today's dog breeds and their coloring. The original wild coat color, which is known in ancestors of dogs - wolves, has been preserved in only a few dog breeds. The color of the coat has been and still is one of the most decisive signs in the process of selecting individuals for breeds. The white spotting is caused by the melanogenesis associated transcription factor (MITF), this gene is point of the interest to many experts, and the mechanism of this coat colour is not fully elucidated yet. In presence, several mutations of this gene are currently known, this mutations are associated with the white spotting.
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The ecological and ethological significance of felid coat patterns (Felidae)
Jaroš, Filip ; Komárek, Stanislav (advisor) ; Horáček, Ivan (referee) ; Weber, Andreas (referee)
The presented work investigates various theories about the significance of felid coat patterns. Most of the hypotheses are based on the theory of adaptive function of animal colouration. As regards felids, it is generally believed that the coat pattern has the function of aggressive resemblance. Early testimonies about cryptic properties of colouration of cats are summarized to provide the historical perspective of the problem. Other putative adaptive functions of patterns are investigated (intraspecific communication, thermoregulation) and close attention is paid to the option that the spotted coat of the leopard (Panthera pardus) serves as a cue for recognition from the perspective of prey. In the next stage, some of the hypotheses are tested by statistical means. The problem is simplified into search for association between a given category of a coat pattern (e.g. spots, stripes) and usual habitat of felid species (e.g. forest, grassland). Pagel's test for correlated changes is employed to account for phylogenetic relationships. In addition to broadly acknowledged hypotheses, the validity of proposition that juvenile coat patterns have the function of protective resemblance is tested. Finally, the problem of colouration of felids is linked to broader context of theoretical biology. Apart from prevailing...
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Genetic determination of coat color in Border Collie
Hronová, Michaela ; Hofmanová, Barbora (advisor) ; Fiala Šebková, Naděžda (referee)
This bachelor thesis should serve as literature review or better say as scholarly introduction to genetic determination of fur in dgo with focusing on Border Collie breed. The thesis itself is divided to several parts. First on eis trying to introduce main pigment types synthesis, then an overview of genes affecting coat color in dogs is given. Next article is determined to versatile use of Border Collies and basic informations on the status of this breed in the Czech Republic. The last part is focused on fur color related genetic diseases. Thanks to the ongoing research of this field, I used some geneticly unverified sources.
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