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Social nest structure of sweat bee Lasioglossum marginatum (Anthophila: Halictidae)
Vinická, Eliška ; Straka, Jakub (advisor) ; Bogusch, Petr (referee)
Family Halictidae is one of the most socially diverse taxa of bees, and especially one of the genera that belongs in this family. It is the genus Lasioglossum, which includes different types of sociality from solitary behavior to eusociality. Among the species of this genus, one stands out and that is the species Lasioglossum marginatum. Its social behaviour was described in the years 1959-1972 by Plateux-Quén in France. Its sociality is eusocial and is completely unique. In its nests there are dozens to hundrets of individuals, all of which are produced by a single queen. The life cycle of this species is not one-year, as in most species, but is spread over 5(6) years and the queen survives the entire time. It is a univoltine species and therefore produces only one generation of offspring per year. This is not unusual, except that eusocial species in this family are always at least bivoltine with a one-year social cycle. In each year of the five-year cycle, the queen produces only workers. Only in the last year of the cycle are future foudresses and males produced. The purpose of this work is to confirm or disprove Plateux-Quénu's statements. Field experiments were performed from 2020 to 2023 in the Kletnice nature reserve in South Moravia. A total of 354 nests were excavated, and their nest...
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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.
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The selected aspects of nesting biology of Great Crested Grebe (Podiceps cristatus) in relation to environmental conditions
JEŽKOVÁ, Eva
The aim of the thesis was the appraisal of Great Crested Grebe (Podiceps cristatus) nesting biology aspects in relation to environmental conditions. The research took 6 months from the 2nd of April to the 2nd of October in 2013 and was realised in the Naděje fishpond system on the ponds Víra, Láska, Skutek, Dobrá Vůle, Rod and Naděje. This fishpond system is situated in CHKO Třeboňsko nearby villages Frahelž and Klec and it consists of total of 15 ponds which are used for intensive fish farming, partly for breeding of Wild Ducks for hunting purposes. The counting of birds, active searching of nests and measuring parameters of nests and eggs were carried out during the work. The nests were found on ponds Naděje, Skutek and Láska. In 2013 18 nests were measured altogether. On the fishpond Naděje 8 nests were situated, on the fishpond Láska 4 nests and on the fishpond Skutek 6 nests altogether. 13 nests of the total were found on a free water surface and 5 nests were situated in the vegetations of the Great Reedmace (Typha latifolia) at a maximum distance of 1 m from the free water surface. In 2013 64 eggs were measured altogether. On the fishpond Naděje parameters of 33 eggs were obtained, on the fishpond Láska 17 eggs and on the fishpond Skutek 14 eggs were found altogether.
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