|
|
Vliv alternativních zdrojů bílkovin v rybím krmivu na růst ryb a rostlin ve dvousmyčkovém akvaponickém systému
NIKL, Ondřej
The objective of this thesis was to evaluate the production efficiency of feeds which were designed with the intention of developing a special aquaponic feed. Further, to evaluate the content of nutrients in water, sludge and nutrient solutions and their influence on plant growth and finally suggest possible modifications to the feed composition. Aquaponic feed should respect nutritional requirements of fishes and plants, not put burden on the environment by not used nutrients and with regards to sustainability, use alternative sources of protein instead of marine fish meal. Because of that, three experimental isoprotein and isocaloric feeds were proposed. Feed A contained conventional ingredients including marine fish meal. Feed B used freshwater fish meal and exclusively plant proteins not regarding its origin. Feed C was made of sustainable and local sources of protein. The experiment was conducted in the aquaponic hall of Faculty of Fisheries and Protection of Waters, University of South Bohemia. As experimental material was used Nile tilapia (Oreochromis niloticus) and lettuce (Lactuca sativa). Feed B shown similar values of all production indicators as conventional feed A. Weight of fishes in system A after thirteen weeks increased by 143,68 % and in system B by 136,56 %. Weight of fishes in system B was at the end of experiment inconclusively lower by 4,08 %. Feed conversion ratio (FCR) of feed B (1,92?0,10) was inconclusively higher by 8,47 % against FCR of feed A (1,77?0,13). Average weight of aerial parts of plants growing in nutrient solution created from mineralized sludge gathered from system B, supplemented with missing nutrients reached value 221,8?33,9 g after four weeks. That was inconclusively more by 44,21 % than average weight of plants grown in special hydroponic solution and by 8,62 % more than weight of plants grown in enriched solution gathered from system A. Experimentally it was proven that in aquaponic feeds it is possible to substitute marine fish meal by alternative source of protein and using these feeds ensure an effective nutrition for fish and plants in a two-loop aquaponic system.
|
|
|
Criminal Liability for the Dissemination of Illegal Content on the Internet
Nikl, Ondřej ; Gřivna, Tomáš (advisor) ; Krupička, Jiří (referee)
Criminal Liability for the Dissemination of Illegal Content on the Internet Abstract As the title of my work suggests, I deal with the issue of criminal liability for the dissemination of illegal content on the Internet. The work is not generally focused on the mechanism of creating criminal liability or shedding light on the concept of illegal content. However, these topics are defined in the first chapter, along with other concepts related to this work. The heart of this work is represented by two areas that cover most of the illegal content distributed on the Internet, namely pornography and hate crimes. These areas are the main theme of my work. The aim of this work is to analyze the issues of these two areas and especially the specifics that are associated with the virtual world. The work deals with both the regulations of European and domestic law, as well as case law. I constantly tried to compose my thoughts in my work, especially in the conclusion, where the de lege lata consideration of the criminality of using the so-called reaction buttons on social networks is described. A large part of internet hate speech has moved to them, and I think that this trend will only continue. The work is divided into four chapters (if I do not count the introduction and conclusion). The first chapter defines the...
|
guest ::
RSS feed.