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Zhodnocení vlivu použitého krmiva na produkční ukazatele v systému intenzivního chovu lososovitých ryb
Ošanec, Miroslav
The objective of this diploma thesis was to evaluate the production efficiency of selected production feeding mixtures in the system of intensive salmonid farming. The testing was made in the recirculation system of the Danish type in Pravíkov (BioFish s.r.o.). There were the feeding mixtures EFIC Enviro 920 produced by Biomar and Aller gold produced by Aqua Aller used in trials. Production efficiency of the feeding was tested on rainbow trout (Oncorhynchus mykiss) and brook trout (Salvelinus fontinalis) in two separate time periods (18. 4. -- 3. 7. 2013; 3. 7. -- 28. 8. 2013) and in one comprehensive period (18. 4 -- 28. 8. 2013). Longitudinal and weight parameters, fitness, exterieur and production parameters (FCR, SGR, etc.) were monitored at the beginning and end of the tests, the biochemical compound of tissues and the fatty acids spectrum in muscle were determined and in the end an economic evaluation was made. In the first test period Aller gold feeding achieved better production results in both SiSav (FCR = 1,3; SGR = 0,86 %.d-1) and in Pd (FCR = 1,26; SGR = 0,72 %.d-1). In the second test period EFICO Enviro 920 feeding achieved better production results in both SiSav (FCR = 1,3; SGR = 0,86 %.d-1) and in Pd. In the overall test EFICO Enviro 920 feeding achieved better production results in SiSav (FCR = 1,73; SGR = 0,75 %.d-1) and Aller gold feeding achieved better results in Pd (FCR = 2,77; SGR = 0,45 %.d-1). During the tests there were large fish losses in the tanks that significantly affected the results. According to the production results Aller gold feeding suited the SiSav better and EFICO Enviro 920 suited the Pd better.
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