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Management generačních ryb candáta obecného (Sander lucioperca) a jeho vliv na produkci jiker a larev
MALINOVSKYI, Oleksandr
This thesis provides an improve to existing reproduction technics through investigation of ecology and physiology features of pikeperch broodstock: (I) Spawning behavior and selectivity to different types of spawning substrates as an important part of the biology of pikeperch species. The main output of the study was revealing of strong selectivity to the spawning site with neither water temperature nor availability of spawning places haven't affected substrate preference of pikeperch broodstock. (II) Spawning in captivity is leads to decrease in physiological status of the pikeperch broodstock, especially in females. It was found that one of the reasons of the decrease was male protective behavior, that in limited space of the reproduction unit is forwarded to female. Separation of the sexes significantly reduces number injuries and improved physiological status of the broodstock. (Ill) The study investigated efficiency of different antifungal agents for pikeperch broodstock. The long term exposure to salt bath in concentration of 2.5, 5 and 10 g L-1 and formaldehyde in concentration 0.015 ml L-1 were found to be highly effective and significantly decreased mortality after spawning. In addition, treatment with salt bath are environmentally friendly and recommended for practical use as an effective way to prevent mortality of pond-cultured pikeperch broodstock. (lV) The provision of live feed is crucially important for proper gametes maturation, particularly in pond-cultured fishes not accepting pellets. The study investigated the effect of temperature on daily biomass of prey consumed by pikeperch broodstock. Significantly increased prey consumption was found after temperature reached 4.5 °C. Females exhibited significantly higher prey consumption rate in compare to male. Study revealed the tendency for pikeperch to consume largest available prey after water temperature reached 8.5 °C.
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Processing of fish in ČR
HOUSKA, Pavel
The aim of my bachelor thesis was to evaluate technological processes in freshwater fish processing and analyse it. The work is focused on processing of common carp, which is one of the most important fish species produced in the Czech Republic. Bachelor thesis is conceptually divided into 4 parts. In the first part the author follows the production and consumption of fish in the Czech Republic in comparison with the world. The present consumption in the Czech Republic is around 4.9 kg of fish per head per year, of which 3.4 kg is accounted for by marine fish. The second part is focused on the anatomical and physiological structure of carp body, which impacts processing. The third part describes the steps of fish processing technology, evaluation of the effectiveness of each approach and product handling after processing. The last part focuses on a final product and its supply in the market.
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Analysis of the fish market in the Czech Republic in the years 2001 - 2010
MATOUŠKOVÁ, Magda
The aim of this thesis is to document the dynamics of market fish production in the Czech Republic from 2001 to 2010. The theoretical part deals with the historical roots of commercial fishing, ways of production of market fish, their species composition, the composition of fish meat and fish consumption. There are also analyzed the factors influencing fish production, fish processing, export and import. All data has been compiled in tables and graphs. There have been described production trends of different kinds of fish, the ways of use of the various fish species in the market, and has been analyzed import of fish and fish products to the Czech Republic.
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Analysis of the export of specific commodity and prediction at future development
LHOTOVÁ, Pavlína
The main goal was to evaluate current market position of a selected Czech business unit within its industry. A selected joint-stock company is involved in an industry of fresh-water fishery. Main part of this thesis is focused on an analysis of fish market as a main foundation for analysing a market position of a future development in this industry.Other analysis processed for selected countries.
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