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Vliv rozdílné techniky aplikace krmiva na produkci kapra obecného (Cyprinus carpio L.) v rybničních podmínkách
Weiser, Tibor
The aim of this work was to evaluate and compare the effect of the Carp - Feed feeding system with the feeding by standard way "by hand" at different densities of fish stock (2000 - 6000 pcs per ha) of common carp (Cyprinus carpio L). In the period of 24.4. -- 27.9. 2012 feeding tests in rearing of carp fry (mirror carp) in the ponds system in Milevsko were conducted. The feed mixture with the increased content of nitrogenous compounds at the level of more than 18% was used in the test. According to results, increasing of individual growth was found at 197 g (45%), resp. 52 g (25%) in the higher stocking density when using the Carp - Feed, which is caused by increased growth intensity by 6.1, resp. 2.2% in the relative daily growth and by 0.22%, resp. 0.044% per day in SGR. The production efficiency of food fluctuated in the range of 0.95 - 1.86 in FCR, 0.54 - 1.05 in FCE, 0.45 - 0.92 in FCR / SGR and 1.774 - 2.311% per day in specific growth rate SGR. The influence of feeding method and stock density on length and weight parameters, exterior and on chemical composition of muscle was statistically significant (P - 0.05). There was not proved any significant influence on fitness indicators. According to the observed results, it is suitable to use the Carp-Feed feeding system, but higher food consumption and lower individual weights at higher densities of fish stock have to be considered. That is why the aim of rearing should be set in advance. According to experiment, it is better to choose higher stock density (6000 pcs per ha) when using the Carp -- Feed for reaching the higher production in acceptable individual weight and for maximum yield. The literary review on feeding problems and possible modification of feed is also part of this thesis.
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