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Vliv teplotních a hyperoxických podmínek na růst, příjem krmiva a fyziologii hybrida sivena arktického (Salvelinus alpinus Linnaeus, 1758) a sivena amerického (Salvelinus fontinalis Mitchill, 1815)
ČEJKA, Jakub
This diploma thesis should have tested growth abilities during different temperature and oxygen regime in hybrid between brook trout (Salvelinus fontinalis) and arctic charr (Salvelinus alpinus) culture. There were survival, growth, feed conversion, weight heterogeneity of fish and somatic indexes as followed indicators. The hypothesis was discovery of differences in growth and mentioned indicators during rearing in water with different temperature and oxygen regime. This thesis consists of two done experiments. There were tested five temperature regimes (7, 10, 13, 16 and 19 °C) in the first experiment. Each of tested groups was repeated four times. The experiment took place 84 days and biometric data were measured always after 21 days period. Results showed that the highest weight growth was achieved in fish reared at 13 °C as specific growth rate achieved 4,12 ? 0,21 % × day-1. Higher temperature regimes (16, 19 °C) are not suitable for rearing of Salvelinus hybrid. Survival of tested group reared at 19 °C were only 41,4 ? 27,3 % after the end of the first experiment. At lower temperatures efficient feed conversion were not managed and specific growth rate were lower than at mentioned temperature 13 °C. There were four tested groups permanent hyperoxia (120 130 %), hyperoxia only during a light part of a day, oscillating hyperoxia/normoxia and permanent normoxia (85 95 %) in the second experiment. Each of tested groups was repeated three times. The experiment took place 63 days and biometric data were measured always after 21 days. There were no difference in survival among tested groups and after the end of the second experiment survival was 86,0 ? 1,4 %. The highest specific growth rate were achieved at the normoxia group 1,48 ? 0,05 % × day-1 and at the group where fish were reared under hyperoxia only during a light part of a day - 1,38 ? 0,10 % × day-1. The most efficient feed conversion was mentioned at the fish reared in permanent normoxia and permanent hyperoxia.
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Analysis of goat herds in South Bohemia
KOUTNÍKOVÁ, Tereza
The objective of this diploma thesis is to compare the level of goat breeding production indicators, recorded in the South Bohemian Region in years 2008 - 2010. The analysis includes comparison between the individual breeders, yearly comparison and comparisons between different breeds and herd sizes. The analyzed production indicators include the amount of produced milk, percentage of fat and percentage of protein. For 2008, 12 breeders with herds ranging from 1 to 34 goats have been analyzed. In 2008, 13 Anglo Nubian goats, 57 White Shorthaired goats and 26 Brown Short Hair goats have been registered in the South Bohemian Region's stock book. For 2009, 12 breeders with herds ranging from 1 to 37 goats have been analyzed. In 2009, 14 Anglo Nubian goats, 64 White Shorthaired goats and 29 Brown Short Hair goats have been registered in the South Bohemian Region's stock book. For 2010, 15 breeders with herds ranging from 1 to 46 goats have been analyzed. In 2009, 10 Anglo Nubian goats, 73 White Shorthaired goats and 42 Brown Short Hair goats have been registered in the South Bohemian Region's stock book. According to the statistical data, the highest average volume of milk (833 litres) has been produced in 2010. The highest average volume of milk has been produced by middle-sized herds (1021 litres) and by the Brown Short Hair breed (960 litres). The highest content of fat in milk has been recorded in 2009 (4.07 %). The highest average content of fat in milk has been recorded within the Anglo Nubian breed (4.32 %). The comparison of the content of fat in milk between various herd sizes is not statistically conclusive (p > 0.05). The average highest content of protein in milk has been recorded within the Anglo Nubian breed (3.74 %). The comparison of the content of protein in milk between various years and herd sizes is not statistically conclusive (p > 0.05).
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INFLUENCE OF FEED PROCESSING TO PRODUCTION PARAMETERS IN MARKET CARP CULTURE AT TREBON FISCHERIES
HLAVÁČ, David
The aim of this study was to examine the production efficiency of processed triticale and compared to unmodified triticale during 135 day feeding experiment on ponds in the system Naděj. Dosing of feed, feeding technique and condition of the market carp in experimental ponds, the quality and quantity of natural food were observed. At the end of the experiment the main production indicators were evaluated and data were statistically evaluated. Higher production efficiency of mechanical and thermally processed cereals was not proved. The highest production efficiency was observed in variant with triticale supplementary feeding without processing (FCR ? 1.4; SGR ? 0.97 %.d-1; PER ? 6.74) and in variant with thermally processed triticale (FCR ? 1.63; SGR ? 0.88 %.d-1; PER ? 5.79). The lowest effective production was reached using grinded triticale (FCR ? 1.68; SGR ? 0.86 %.d-1; PER ? 5.62). Results were affected by different levels of quantity of zooplankton in the monitored ponds.
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Evaluation of carp fish-scale reading production indicators in fishponds
PETR, Miloš
The main fish in the Czech pond aquacultures is Cyprinus carpio (common carp). All forms of carp feed on natural food and additionally they are fed with bread cereals. In the literary review I will describe the various cereals, which are used in carp-scale reading. Further I'll try to focus on the editing posibilities of the various cereals to increase their productive effectivity. In the chapter "Results and discussion" I will describe the characteristics of growth and condition indicators of experimental fish stocks during the growing season, in experimental ponds in South Bohemia, near the city of Třeboň. Finally, I review the results and try to propose some ways to use different feeds in working practices.
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