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Children with Phenylketonuria in kindergarten
BLAHOVCOVÁ, Veronika
This bachelor thesis is focussed on the problematic approach towards children with metabolic disorder ? phenylketonuria in a family and an environment of kindergarten. Congenital metabolic disorders lead to lack of certain substances in organism, or, on contrary, accumulation of them. Such disorders have various clinical displays, from harmless ones (often without symptoms) thru severe handicaps of physical and mental development to life-threatening states. The thesis is focussed on approach of parent as well as kindergartener towards child and it adverts to necessary adherence to diet restrictions.
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Effect of temperature, fish size and feeding on oxygen consumption and ammonia excretion in the Nile tilapia (Oreochromis niloticus)
DENKOVÁ, Adéla
Aim of this work were to assessed the impact of feeding, temperature, stocking density, fish size and water temperature on ammonia excretion and oxygen consumption of Nile tilapia (Oreochromis niloticus) in recirculating system. Concentration (saturation) of oxygen, water temperature and pH were measured using multimeter and concentration of ammonia was assessed by direct Nessler method. For assessing of effect of fish size, three groups of tilapias weighed 25, 65 and 140 g were established, each group in four replicates. For assessing of effect of feeding was tilapias (body weight 65g) divided into groups fed continuously, two meals per day and four meals per day, each group in four replicates. For assessing of effect of stocking density was tilapias (body weight 65g) divided into groups of 20, 50 and 80 kg.m-3, each group in four replicates. All experiments were performed for water temperature of 23, 27 and 31 °C and for fed and starved fish. Mean daily oxygen consumption was higher for smaller fish categories than for bigger ones and grow rapidly after feeding. The kind of feeding had impact on diurnal fluctuation of oxygen consumption. It was also confirmed that tilapia can survive low level of oxygen concentration for a quite long period.
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The metabolism of selected species of predatory aquatic insects
KLEINOVÁ, Miroslava
Title: Metabolism of selected species of predatory aquatic insects. Target: The main objective of this study was to analyze metabolic rates of predatory aquatic insects, in my case dragonflies (order Odonata, suborder Anisoptera). Different instars of several species of dragonflies were observed. Another objective was to determine the dependence of the metabolic demands on the species and size of the individual, create tables and graphs summarizing the most important results and perform a basic statistical analysis. Methods: In my work I used the method of measuring the consumption of dissolved oxygen, using a polarographic determination of oxygen concentration with a membrane-covered oxygen sensor. Results: The rate of metabolism on the unit weight decreased with increasing weight and size, which corresponds to the assumptions of metabolic theory of ecology.
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