National Repository of Grey Literature 6 records found  Search took 0.01 seconds. 
Population viability analysis of endangered species in Czech Republic
Šťastná, Andrea ; Helman, Karel (advisor) ; Bašta, Milan (referee)
Diploma thesis analyzes the viability of the selected species populations in the Czech Republic. The thesis is divided into two main parts. The first part contains a stochastic model simulating possible scenarios of the Eurasian lynx population size in the Czech Republic. For this model program Vortex was used. The second part is focused on Time series analysis of the Grey Partridge and the Common Kingfisher population, where data was obtained from the Czech Society for Ornithology. This analysis aims on identification of factors that may affect the viability of the two bird species.
Nest predation risk in Grey Partridge (Perdix perdix)
Holomek, Stanislav ; Šálek, Miroslav (advisor) ; Poláková, Simona (referee)
The gray partridge (Perdix perdix) is a bird species living in hiding and nesting on the ground in the open landscape. Even though this species uses several well-known anti-predator adaptations and strategies, its nests are often predated. The range of nest predators and the circumstances of predation have not, however, been satisfactorily described yet. This diploma thesis summarizes the results of experiments carried out on artificial nests and is supplemented by the description of nest behaviour of two incubing hens obtained from video shooting their nests. This work also includes the results of video shoots of predators on artificial nests, the most common of them being the marten. The successful survival of nests in all experiments was influenced mainly by hiding the nest in vegetation. However, the presence of feather odour of adult birds increased the risks of predation even for well-hidden nests. Nests placed in grass biotopes survived the best regardless their covering. What mattered most in other biotopes (along the edges of field roads, forests or groves and field biotopes off any lines) was the covering of nests with vegetation. Partridges nesting close to the edge of a forest or a grove are not very safe from predators. The fact that both nesting partridges and nest predators prefer a...
Phenotypic traits and pairing success of the Grey Partridge \kur{(Perdix perdix)}
The master thesis works measures of phenotypic traits and unique data of pairing of wild living grey partridges. The secondary sexual traits and theirs variability is described. Especially the relationship between the ornamental traits and the pairing success was researched. The results proved the greater pairing success of males with the larger melanin breast patch and the greater quality of the mate in females with the larger breast patch. The strategy of male floaters, which are realatively well ornamented is discussed.

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