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Global phylogeography of the deep-sea fishes
Knězů, Tereza ; Musilová, Zuzana (advisor) ; Vukićová, Jasna (referee)
Phylogeography of deep-sea fish remains poorly explored, largely due to the extreme conditions in which these organisms live and limited technological capabilities for researching these species. The aim of this thesis is to summarize the information known about the phylogeography of deep-sea fish, identify factors influencing population distributions, and connect them on a global scale. The distribution of deep-sea fish populations is influenced by physical, topographic, and hydrographic factors. Their connectivity is driven by the migratory abilities of fish and the utilization of marine currents for their dispersion. Migration is divided into vertical and horizontal. The vast majority of deep sea fish undergo some form of migration, at least during ontogenetic development. The most common is diurnal vertical migration, where fish regularly move to shallower depths at night for feeding. Molecular methods, mainly mitochondrial DNA markers, were used for research to determine the phylogenetic tree of species. The results suggest that the topography of the seafloor is rarely a barrier to the flow of genetic information. Furthermore, the results often refute the hypothesis of isolation caused by the distance between populations. They often exhibit a relatively high rate of panmixia. When speciation...
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Spatial Dynamics of the Population in the Czech Republic, 1989 - 2007
Vobecká, Jana
The aim of the thesis is to describe, analyse and discuss the development of spatial population dynamics in the Czech Republic between 1989 and 2007. Demographic structure and migration, the two components of spatial population dynamics, are analysed using two spatial dimensions, the urban-suburban-rural gradient and the core-periphery region distinction, using quantitative analyses, including gravity regression modelling of migration. The analysis primarily focuses on domestic migration as the main vehicle of spatial population dynamics. It discusses the structure, determinants, and temporal evolution of migration and its consequences on the population structure in different spatial categories. The thesis indicates that suburbanisation has recently become the main factor influencing Czech spatial population dynamics. The key factor determining migration destination is the social status of migrants, whereas age has only secondary importance. However, since Czechs are not very mobile, population dispersal is less large-scale than in Western-Europe. This explains why recent domestic migration patterns have had only a small measurable influence on the social or demographic structures of the population across spatial categories.
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Spatial Dynamics of the Population in the Czech Republic, 1989 - 2007
Vobecká, Jana
The aim of the thesis is to describe, analyse and discuss the development of spatial population dynamics in the Czech Republic between 1989 and 2007. Demographic structure and migration, the two components of spatial population dynamics, are analysed using two spatial dimensions, the urban-suburban-rural gradient and the core-periphery region distinction, using quantitative analyses, including gravity regression modelling of migration. The analysis primarily focuses on domestic migration as the main vehicle of spatial population dynamics. It discusses the structure, determinants, and temporal evolution of migration and its consequences on the population structure in different spatial categories. The thesis indicates that suburbanisation has recently become the main factor influencing Czech spatial population dynamics. The key factor determining migration destination is the social status of migrants, whereas age has only secondary importance. However, since Czechs are not very mobile, population dispersal is less large-scale than in Western-Europe. This explains why recent domestic migration patterns have had only a small measurable influence on the social or demographic structures of the population across spatial categories.
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Spatial Dynamics of the Population in the Czech Republic, 1989 - 2007
Vobecká, Jana ; Fialová, Ludmila (advisor) ; Musil, Jiří (referee) ; Marty, Pascal (referee)
3 Abstract The aim of the thesis is to describe, analyse and discuss the development of spatial population dynamics in the Czech Republic between 1989 and 2007. Demographic structure and migration, the two components of spatial population dynamics, are analysed using two spatial dimensions, the urban-suburban-rural gradient and the core-periphery region distinction, using quantitative analyses, including gravity regression modelling of migration. The analysis primarily focuses on domestic migration as the main vehicle of spatial population dynamics. It discusses the structure, determinants, and temporal evolution of migration and its consequences on the population structure in different spatial categories. The thesis indicates that suburbanisation has recently become the main factor influencing Czech spatial population dynamics. The key factor determining migration destination is the social status of migrants, whereas age has only secondary importance. However, since Czechs are not very mobile, population dispersal is less large-scale than in Western-Europe. This explains why recent domestic migration patterns have had only a small measurable influence on the social or demographic structures of the population across spatial categories. Key words: suburbanisation, domestic migration, gravity modelling,...
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