National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Biology and methodics in breeding of the exhibition Zebra Finch (\kur{Taeniopygia guttata}), taking into account nutrition and deviations of body dimensions
PAPAČ, Martin
The diploma thesis is focused on avian domestication and represents a complete summary of existing studies and knowledge on this topic. Domestication is a long-term process which occurs for thousands of years but its consequences are often overlooked. Without any doubts the impact of domestication on the animals is significant and there are several hypothesis presented in the related studies. Considerable part of the studies have shown the ultimate and proximate control, which is responsible for influence of the biology of the Zebra Finch (Teaniopygia guttata). Usually, the comparison of data, which was collected under the same conditions for the wild and exhibition type, was the weak spot of these studies. Theoretical part gathers some of the most important theories related to this issue. Some of them have been used in the own experiment, which took place in my private facility. Therefore, the aim of this study is to prove or disprove particular hypothesis based on the breeding of the Zebra Finch (Taeniopygia guttata). The research took two years and according to the data, the type influences biology of these birds. The results shows that the main factor responsible for nest building, egg size, egg weight, chick weight and the fledging period is the type.
Influence of season of nesting on the sex ratio of chicks of parrots genus \kur{Neophema}
PAPAČ, Martin
This bachelor thesis represents complete summary of most of avian sex ratio studies. A very important moment was discovering of PCR analysis in 90's. This method enables to determine sex at molecular level. Older works which lacked PCR could not determine sex reliably and therefore their results can be misleading. PCR can determine sex ratio at primary, secondary and tertiary level. Sex ratio manipulation in birds is probable evolutionary mechanism and there are several hypothesis regarding to that. Many experimental studies have shown possible ultimate and proximate causes which are responsible for sex ratio manipulation. However, low data sample was one of the causes why they have been considered to be doubtful. I have summarized several most important points of this field within my literal review. The main goal of this study is to confirm or disprove some of the hypothesis in my breeding of Scarlet-chested Parrots (Neophema splendida). The research took three years and despite considerable domestication the sex ratio manipulation was proved in this species. Results show that the main factor affecting sex ratio was photoperiod during the breeding season and order of nesting.

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