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Water utilization in ZOO Brno
Hejsková Pekárková, Marie ; Zlámalová Gargošová, Helena (referee) ; Kotlík, Josef (advisor)
Master's thesis deals with water utilization in exposition of arctic wolf and canadian beaver in ZOO Brno. Theoretical part describes water utilization in ZOO and processes in water connected with nutrient enriching and uprising of water bloom. Practical part focuses on monitoring water quality in April and May 2012 and concept to solute water filtration in ponds.
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Seasonal variation of the territorial behaviour of the European beaver (Castor fiber L.).
Kadlecová, Hana ; Horáček, Ivan (advisor) ; Červený, Jaroslav (referee)
The presented thesis deals with the temporal and spatial changes in activity of the European beaver (Castor fiber L.) during different seasons. Basic dataset was obtained by continuous telemetric monitoring of selected individuals in years 2008 and 2009 in two different geographical areas, namely in the Bohemian forest and in southern Moravia. The scope of the thesis was to record, evaluate and interpret the behavior of European beaver during the year. I focused myself especially on the beginning and end of activity in relation to incidence of sunrise and sunset, duration of stay in the field, changes in the size of actively-used area and time-duration and length of the movement. In cases where there were more active individuals monitored within the studied area, I also watched for their mutual interaction. In statistical analysis of gained data I also took into account the sex and age of the individuals. Beaver's behavior varies during the year. They are most active in spring and autumn, while in winter their activity decreases significantly. This observation is valid not only for the time duration and length of movement trajectories, but also for the size of actively-used area. The beginning of activity is strongly correlated with the sunset, while the end does not show any correlation with...
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Bottleneck and selection effects on MHC genes variability in relic and newly formed Eurasian beaver populations
Náhlovský, Jan ; Munclinger, Pavel (advisor) ; Bryja, Josef (referee)
MHC glycoproteins are an essential part of adaptive immunity and may also play a role in mate choice. In addition, MHC genes are the most variable of all known genes. For these reasons, they have been intensively studied for several last decades. However, research is complicated due to extreme variability and frequent duplications. The Eurasian beaver seems to serve as an interesting model. It underwent a dramatic bottleneck culminating in the end of 19th century, when only about 1,200 individuals survived in several isolated relic populations. Thanks to numerous reintroductions, beavers of various origin meet in newly established populations. However, knowledge of beaver MHC was very limited. Only a single MHC gene has been investigated in a detail, and some relic populations were not sampled. Utilising additional relic populations and additional MHC locus, I verified a significant reduction of the variability of beaver MHC genes and also found signs of selection in the past. Then I sequenced MHC loci in two newly formed populations. I confirmed the ongoing selection by the disruption of cytonuclear equilibrium and the advantage of divergent alleles. We therefore can have a unique insight into the several periods of the history of beaver populations: In the past, MHC diversity was shaped by a...
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Seasonal variation of the territorial behaviour of the European beaver (Castor fiber L.).
Kadlecová, Hana ; Horáček, Ivan (advisor) ; Červený, Jaroslav (referee)
The presented thesis deals with the temporal and spatial changes in activity of the European beaver (Castor fiber L.) during different seasons. Basic dataset was obtained by continuous telemetric monitoring of selected individuals in years 2008 and 2009 in two different geographical areas, namely in the Bohemian forest and in southern Moravia. The scope of the thesis was to record, evaluate and interpret the behavior of European beaver during the year. I focused myself especially on the beginning and end of activity in relation to incidence of sunrise and sunset, duration of stay in the field, changes in the size of actively-used area and time-duration and length of the movement. In cases where there were more active individuals monitored within the studied area, I also watched for their mutual interaction. In statistical analysis of gained data I also took into account the sex and age of the individuals. Beaver's behavior varies during the year. They are most active in spring and autumn, while in winter their activity decreases significantly. This observation is valid not only for the time duration and length of movement trajectories, but also for the size of actively-used area. The beginning of activity is strongly correlated with the sunset, while the end does not show any correlation with...
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Is the fur good predictor of intoxification of European beaver (Castor fiber) populations?
Faltová, Karolína ; Vorel, Aleš (advisor) ; Korbelová, Jana (referee)
This thesis deals with the burden of European beaver (Castor fiber) populations with risk elements in three areas of the Czech Republic and one area in Slovakia. There were investigated concentrations of heavy metals (Cd, Zn, Fe, Cu, Pb and As) in the kidneys, livers, lungs, hearts, muscles and fur of 19 found dead beaver individuals. Furthermore, their food was analysed to determine the contamination of their areas of origin and discover, which organ reflects the observed concentrations of Cd the best. The main aim of the study was to determine whether the analysis of hair could be used as a non-invasive method to reflect the concentrations of heavy metals in beaver populations in future. The results were conclusive only for As, whose concentrations in the hair was the second highest and correlated with the content of As in the lungs, which contained the highest concentrations of arsenic. Cadmium in the fur showed a reverse structure compared to the content of Cd in kidney and liver. There were found significant differences in the contamination with heavy metals between beaver populations and their environments. Analysis of the fur is not proved for most of the elements and it is necessary to investigate further non-invasive methods to determine the load of toxic elements on beaver populations.
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Water utilization in ZOO Brno
Hejsková Pekárková, Marie ; Zlámalová Gargošová, Helena (referee) ; Kotlík, Josef (advisor)
Master's thesis deals with water utilization in exposition of arctic wolf and canadian beaver in ZOO Brno. Theoretical part describes water utilization in ZOO and processes in water connected with nutrient enriching and uprising of water bloom. Practical part focuses on monitoring water quality in April and May 2012 and concept to solute water filtration in ponds.
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