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Vliv produktů ze zpracování konopí ve výživě kapra obecného (Cyprinus carpio L.)
Palíšek, Ondřej
The aim of this study was to compare the effect of feed mixtures with different proportion of cannabis products on fingerling of common carp (Cyprinus carpio L.). The addition of hemp cake to feed was tested. The feed experiment was conducted in period 21.9.2016 - 21.11.2016 in recirculation system consisting of 10 tanks of 200 l volume connected to a biofilter. During the experiment, control weight measuring was performed and the hydrochemical and physical parameters in every tank were recorded. Fish were fed feedstuff with 5 %, 10 % and 15 % of hemp cake. On average, the fish grew from 35.37 grams to 57.24 grams. The best feed conversion ratio (FCR), specific growth rate (SGR) and ratio of these two values achieved fish fed feeding mixture number 2 with 10 % of cannabis cake (FCR 3,14, SGR 0,83 %, FCR/SGR 3,96). Statistical significant influence of feed mixture on content of proteins, fats and n-3 fatty acids in carp muscle was not proven.
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Selected aspects of intensively cultured European whitefish (Coregonus maraena, Bloch) and peled (Coregonus peled, Gmelin)
ŠEBESTA, Roman
Maraena whitefish and peled are considered to be economically important fish species. This Ph.D. thesis deals with testing of selected aspects which show potential for improvement of quality and effectivity of larvae and juveniles of both fish species in recirculating aquaculture systems. The whole Ph.D. thesis includes 9 chapters described in 125 pages. In chapters 2-8, there are described the individual factors which can influence quality of intensive rearing of mentioned fish species. The effect of light intensity and tank wall colour on growth and survival of peled larvae is tested in chapter 2. The effect of different temperature on growth and survival of maraena whitefish larvae is presented in chapter 3. The effect of various stocking density on growth and survival of maraena whitefish larvae is given in chapter 4. The influence of different feeding strategy on survival, growth, and intestine and liver development of maraena whitefish larvae is being shown in chapter 5. The effect of various weaning time and co-feeding duration on growth and survival of peled larvae is described in chapter 6. The effect of variable water oxygen saturation on growth and haematological profile of peled juveniles is shown in chapter 7. The prevalence of deformities in intensively reared peled and comparative morphometry in intensively reared fish compared to pond-reared fish is described in chapter 8. Ph.D. thesis contains important advices which can be used in fishery practise and at the same time they can prevent from elevated fish mortality.
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Vliv plemenné příslušnosti a technologie chovu na růstovou schopnost jatečného skotu
Berková, Veronika
My Bachelor s thesis deals with the impact of breed and breeding technology on growth of the cattle for slaughter. It aims at defining every cattle breed that has been frequently used for slaughter in the Czech Republic. It also aims at describing the most common technologies of animal housing in the period of animal fattening. It points out that the essential principles and rules must be applied and followed so that the healthy offspring might be reared. At the same time, this Bachelor s thesis shows various methods of animal rearing, dairy cattle and meat cattle breeding too. In the initial part of the Bachelor s thesis, there are statistical data on the cattle livestock, amounts of slaughtered animals and data concerning the beef meat production. A year-on-year comparison of data has been made, and these data have been compared internationally as well. There is a chapter that deals with the nutrition and diet of the cattle for slaughter and veals in the Bachelor s thesis. Nutrition, diet and growth of the cattle for slaughter are closely related. In the final part of the Bachelor s thesis, an experiment is outlined. It is to be carried out for the purpose of the Master thesis later. It is to evaluate the growth of animals bred with various breeding technologies (animals will be weighed and the growth of animals will be measured).
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Water temperature influence on the success of intensive farming of burbot (Lota lota L.)
CHOTĚBORSKÝ, Michal
The aim of this work was to realize the first intensive rearing of juvenile fish of burbot in the Czech Republic (TL = 165.79 +- 18.87, W = 32.91 +- 10.27 g) in recirculation aquaculture system (RAS) at different water temperatures. A total of 9 tanks were used in the three separate RAS systems. For a period of 12 weeks survival (S), specific growth rate (SGR), feed conversion ratio (FCR) and the condition of the fish (FC) was observed at 3 week intervals. The best values of survival (98 +- 0.4%) were achieved in burbots kept at a water temperature of 15 ° C. Survival in the group of fish kept at a water temperature of 18 °C did not statistically differ from the group of fish reared at 15 °C and 21 °C. The SGR value for the fish at a water temperature of 15 °C was (0.7 +- 0.09%.d-1) at 18 °C the SGR value was (0.45 +- 0.1%.d-1) and fish kept at a water temperature of 21 °C reached SGR values of 0.33 +- 0.04%.d-1. The best FCR values (1.27 +- 0.35) were reached also in the group of fish kept at 15 °C. For burbot kept at a water temperature of 21 °C, the FCR value was 2.78 +- 1.17. Based on our results we can conclude that the most appropriate water temperature for rearing juvenile burbot was 15 °C.
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The optimization of transfer Northern whitefish larvae (Coregonus peled) on complete feed mixture.
PITHARDT, Tomáš
In this work was tested optimal rearing protocol for Northern whitefish larvae in two experiments. Both experiments lasted for 34 days. In the first experiment the effect of feed particle size on the survival and growth were tested in Northern whitefish larvae with initial body weight of 3.01 +- 0.48 mg. Larvae were weaned from live feed 10th, 15th, 20th, 25th and 30th day after hatching when co-feeding was took for 3 days before the weaning. In the first experiment were tested particle size of 100 micrometers and 300 micrometers. Groups weaned 20th, 25th and 30th with 100 micrometers feed and groups weaned 25th and 30th with 300 micrometers feed had similar final survival (without significant differences). The best growth (final weight 39 +- 12 mg) had group weaned 30th day after hatching using particle size of 300 micrometers. In the second experiment the effect of length of combined feeding (co-feeding) on the survival and growth were tested in Northern whitefish larvae on a unit weight 3.01 +- 0.48 mg. Co-feeding lasted for 1, 3 or 6 days before the weaning. Larvae were weaned from live feed 10th, 15th, 20th, 25th and 30th days after hatching. Groups weaned 10th, 15th, 20th, 25th and 30th had similar final survival (without significant differences). But the best growth (final weight 37 +- 15 mg) reached group weaned 30th day after hatching with combined feeding for one day. Groups weaned 20th, 25th and 30th had similar final body weight (without significant differences). There was no observed effect of co-feeding duration on survival and growth.
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Influence of Light Regime on the Success of Adaptation of Pike (\kur{Esox lucius}) Larvae on Pelleted Feed in RAS
DUŠEK, Tomáš
The objective of this thesis for a bachelor´s degree was to experimentally evaluate possibilities of adaptation of northern pike (Esox lucius) for controlled breeding conditions in the RAS and for intake of artificial pelleted feed. Special attention was focused on the influence of light regime on the success of adaptation and the rate of cannibalism. The experiment was divided into six groups with different light regimes (L8 : D16, L4 : D8 : L4 : D8, L12 : D12, L4 : D4 : L4 : D4 : L4 : D4, L16 : D8, L8 : D4 : L8 : D4). Into each group were putted 3,600 pieces of pike larvae, which means 20 pcs/l. Feeding was carried out manually in 15 minutes time interval. Daily mortality was recorded and biometric measurements were conducted. After 15 days, the experiment was evaluated. Adaptation for intake of pelleted feed was successful. As was found out, the light regime has the influence on survival, cannibalism and growth of northern pike in RAS. The highest final piece weight was achieved under the light regime L16 : D8 (W= 0,13135 ? 0,02924 g). The lowest final piece weight was achieved under the light regime L8 : D16 (W= 0,06296 ? 0,01306 g). The highest survival was achieved under the light regime L8 : D4 : L8 : D4 (61,36 %), the worst under the light regime L4 : D8 : L4 : D8 (28,33 %).
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