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A range-wide assessment of carry-over effects within the full annual cycle of the Great Reed Warbler with a focus on sex and population differences
Brlík, Vojtěch ; Procházka, Petr (advisor) ; Bauer, Silke (referee)
Movements of long-distance migratory birds are frequently well timed and routed in order to maximise individual fitness. However, individual timing of events or environmental conditions experienced have a potential to carry over into subsequent annual cycle stages and may have delayed fitness consequences. Therefore, knowledge of these seasonal interactions is crucial to identify key periods and regions that limit survival beyond the breeding period and thus to fully understand population dynamics of migratory species. Despite current evidence for seasonal interactions, there is no detailed knowledge of the complex of relationships within the full annual cycle, differences between sexes and populations or impact of environmental conditions during moult in one species. To unveil this system of seasonal interactions within the annual cycle, we directly tracked 103 great reed warblers (Acrocephalus arundinaceus) using light-level geolocators from five breeding sites across the breeding range to obtain information on timing and positions of annual cycle events. We then combined this information with various remotely sensed habitat condition metrics and stable isotopic composition of feathers from the non-breeding grounds to identify and quantify carry-over effects within the full annual cycle. Our...
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A range-wide assessment of carry-over effects within the full annual cycle of the Great Reed Warbler with a focus on sex and population differences
Brlík, Vojtěch ; Procházka, Petr (advisor) ; Bauer, Silke (referee)
Movements of long-distance migratory birds are frequently well timed and routed in order to maximise individual fitness. However, individual timing of events or environmental conditions experienced have a potential to carry over into subsequent annual cycle stages and may have delayed fitness consequences. Therefore, knowledge of these seasonal interactions is crucial to identify key periods and regions that limit survival beyond the breeding period and thus to fully understand population dynamics of migratory species. Despite current evidence for seasonal interactions, there is no detailed knowledge of the complex of relationships within the full annual cycle, differences between sexes and populations or impact of environmental conditions during moult in one species. To unveil this system of seasonal interactions within the annual cycle, we directly tracked 103 great reed warblers (Acrocephalus arundinaceus) using light-level geolocators from five breeding sites across the breeding range to obtain information on timing and positions of annual cycle events. We then combined this information with various remotely sensed habitat condition metrics and stable isotopic composition of feathers from the non-breeding grounds to identify and quantify carry-over effects within the full annual cycle. Our...
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Comparisons of softball swing at pitches from a pitching machine and pitcher
Šmejkalová, Petra ; Carboch, Jan (advisor) ; Pravečková, Petra (referee)
Title: Comparisons of softball swing at pitches from a pitching machine and pitcher Objectives: The aim of this research is to compare the timing of players of softball within individually phases of hitting by a standard softball pitcher and a pitching machine. Another aim is to analyse individual phases of softball hitting and determine whether the training of hitting through a pitching machine is a appropriate substitute for the preparation of a standardized softball pitching which softball players experience during each match. Methods: This research is a descriptive case study, in which we gather a large number of data from five individuals. A ride of five players and their execution of hitting approaches against a pitching machine and real pitcher was created. Subsequently the record from the camera Basler GeniCam piA640-210gc with frame rate 200 frames per second was then evaluated via of computer program Dartfish, which is designed for analyses of motor skills. Results: The results show that the whole movement of players was noticeably slower, in the case of a pitching machine use. Regarding the use of a pitching machine and real pitcher, the statistic results show differences. The differences derive from the absence of conscious prediction of pitches motion in the case of the pitching...
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Comparisons of softball swing at pitches from a pitching machine and pitcher
Šmejkalová, Petra ; Carboch, Jan (advisor) ; Pravečková, Petra (referee)
Title: Comparisons of softball swing at pitches from a pitching machine and pitcher Objectives: The aim of this research is to compare the timing of players of softball within individually phases of hitting by a standard softball pitcher and a pitching machine. Another aim is to analyse individual phases of softball hitting and determine whether the training of hitting through a pitching machine is a appropriate substitute for the preparation of a standardized softball pitching which softball players experience during each match. Methods: This research is a descriptive case study, in which we gather a large number of data from five individuals. A ride of five players and their execution of hitting approaches against a pitching machine and real pitcher was created. Subsequently the record from the camera Basler GeniCam piA640-210gc with frame rate 200 frames per second was then evaluated via of computer program Dartfish, which is designed for analyses of motor skills. Results: The results show that the whole movement of players was noticeably slower, in the case of a pitching machine use. Regarding the use of a pitching machine and real pitcher, the statistic results show differences. The differences derive from the absence of conscious prediction of pitches motion in the case of the pitching...
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