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Využití vybraných komponentů rostlinného původu ve výživě ryb
Zugárková, Iveta
The main aim of this Bachelor´s thesis was to create a literary review on the use of selected plant components in fish nutrition. Part of the review contains data on fish bre-eding and nutrition, nutritional requirements regarding the nutrients and customization of fish food. The second part of the Bachelor´s thesis presents a draft on the methodo-logy of a feeding test. Both scaled and mirror forms of common carp (Cyprinus carpio L.) will be used in this test and fed different crops: feeding and low-phosphate wheat, feeding and pearl barley. The corps will be processed into granule to make the food intake and utilization easier. The test will star in May 2016 and be carried out in the recirculation system of the aquarium room at the Department of fishery and hydrobiolo-gy of the Mendel University in Brno. The aims of the test is to evaluate the production effectiveness of used crops, including their influence on the chemical composition of fish tissues and selected parameters of internal environment of fish bodies. The tested crop species were chosen based on the data on the influence of various crops on the phosphorus level reductions in fishponds. Because the plant food for carp represents the most expensive part of carp breeding, there is ongoing research for finding economically and nutritionally suitable food.
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Vliv vybraných těžkých kovů na fyziologii ryb
Šanda, Radek
The study aims on effects of mercury on haematological and biochemical parameters in blood plasma on common carp (Cyprinus carpio L.). The theoretical part of study is focused on phenomenon of occurrence of mercury and its forms in aquatic environment and fish. Practical portion of study includes the effects of administration to mercury and also the effects of co-administration of sodium chloride. In the first experiment we carried out the exposure of Cyprinus carpio L. by selected mercury concentrations for 5, 10 and 15 days. In the second experiments were carps exposed to 1.5 micro g.l-1 mercury with the addition of various concentrations of sodium chloride (29 mg.l-1, 300 mg.l-1 and 1000 mg.l-1) for 72 h. For the evaluation of haematological and biochemical biomarkers in blood plasma of carps, we exploited the Konelab T 20xt and Easy Lyte machines. The obtained data were statistically processed and evaluated.
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Influence of supplementary feeding on productive indicators of fishes
ZEMAN, Ondřej
This paper evaluates the influence of supplementary feeding of multi-species stocks with various densities on productive indicators of the common carp (Cyprinus carpio L.) and conversion of feeding. The chosen issue has been researched as a feeding experiment for 145 days at the joint-stock company Rybářství Třeboň, in four ponds of the Naděje fish pond system (Nadějská rybniční soustava) and two control fish ponds situated in the near of the village Ponědrážka. In the ponds, there were two different stocking densities. Fished were supplementary fed by heat treated wheat. The achieved results compare fishes' growth depending on the feeding conversion in various breeding condition.
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