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Effect of surface texturing on starved contact
Jordán, Jakub ; Náhlík, Luboš (referee) ; Křupka, Ivan (advisor)
The diploma thesis deals with the analysis of the effects surface texturing on starved contact. Experimental verification was realized on apparatus simulating contact between a steel ball and glass disc using colorimetric interferometry and high-speed camera. The work deals with lubrication regimes, problems with starved contacts and surface texturing which can reduce effects of starvation on non-conformal surface contacts.
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Impact of long-term storage on fish welfare
PECHER, Petr
The literature review is completely described by the issue of fish welfare and whether fish feel pain. Then there are describes the basic procedures for measuring fish welfare. Among which belongs for example a cortisol and glucose in fish blood capillary. The aim of the study was to evaluate the effect of different stress factors during storage on fish welfare and to changes in production, exterior and length and weight indicators. For the experiment was selected carp (Cyprinus carpio) divided into two groups by weight 2.5 kg to 2.5 kg and above. The results are the values of visceral fat, capillary blood lactate and changes in production, exterior and length-weight indicators during the application and the end of the experiment.
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Respiration of spiders during satiation and starvation
KRAUS, Roman
I raised the young spiders breeders known species Lasiodora parahybana a stage suitable for the target work. The goal is to measure and graphically express the consumption of oxygen (O2) and record the value of spiders saturated metabolism during starvation. 37 days, I measured 20 spiders in 2 batches in Warburg respirometer. The spiders after some time has been to regulate metabolism and to the values of its viability. The resulting value is visible decrease in metabolism and weight loss.
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Metabolism of B.vagans during satiation and starvation
DENKOVÁ, Adéla
The aim of the work was to introduce an extraordinary ability of Brachypelma vagans: survive some time of starvation by regulation its own metabolism to minimum. The oxygen consumption for body mass unit was measured for 576 hours for each of eleven objects. Results were placed into the tabs and graphs and were rated. During the experiment were lost four objects because of starvation and alcaly burn.
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Influence of starvation on willingness to risk in Great tit (\kur{Parus major}) and Blue tit (\kur{Parus caeruleus})
TUMOVÁ, Petra
In this work, I investigated influence of starvation on willingness to risk for food in presence of a predator. Experiments proceeded in winter when birds are not influenced by fear about clutch or brood and therefore the food becomes their priority. I tested birds in laboratory conditions where is possible to monitor and regulate food availability. Tits were tested for stuffed model of dangerous hunting specialist sparrow hawk (Accipiter nisus), nest predator jay (Garrulus glandarius) and harmless similar-sized bird pigeon(Columbia livia f. domestica). A control experiment without a model was conducted too. Each bird was tested for given model replete and hungry and each bird was tested only for one model. We were interested in differences in reactions to individual models and the influence of repletion rate; if the behaviour was different between replete and hungry birds, or in the {\clqq}accustom`` phase and in experiment itself. We also investigated, if there are differences in behaviour between Great Tits and Blue Tits.
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