|
|
Morphology and reproduction parameters of Achatinidae (Gastropoda)
BUNDOVÁ, Michaela
The bachelor thesis deals with aspects of breeding of gastropods of the family Achatinidae. The thesis contains basic information about the family Achatinidae and the overview of the gastropods of the family Achatinidae in the Czech Republic. There is a problem of reproduction of terrestrial gastropod mollusks and Achatinidae land snail. In the practical part, data were collected from the breeders of these gastropods. There was the determination of the basic morphological parameters of the sexually mature land snail and the size of the clutches, which were compared among the specified species. The processed results show that the larger the individual's shell, the greater the number and the volume of the eggs in the clutch. With the increasing number of eggs in the clutch, the volume of eggs decreased.
|
|
|
Importance of the presence of parents for the eggs development and fry mortality in fish of the genus \kur{Hemichromis}
MICHALIČKA, Petr
Through this experiment there was examined the effect of the presence of the parents in the development and mortality of fish spawn of the genus Hemichromis. Hemichromis guttatus was selected for this experiment as a model species. It was found that the parental care in the fish genus Hemichromis is most needed during the period when the offspring is in the stage of eggs. In this stage, the absence of parents showed higher level of mortality (greater number of attacked by mold eggs left without parental care). In other developmental stages of the offspring the parental care was not a great advantage, on the contrary, in some cases allowing parents to take care of the screed was a disadvantage due to cannibalism.
|
|
|
Impact of selected factors on laying hens and egg quality.
ZDICHYNEC, Martin
In accordance with the specification of the thesis I developed a methodology target program and I watched it four identical halls, which have different technology housed laying hens. In this thesis are analyzed indicators lay in the selected poultry company in the South Bohemia for the impact of housing hens, their nutrition and feeding. In the selected company enterprise on the one hand technology is used enriched cages EUROVENT - EU Big Dutchman and on the one hand technology aviary housing system used LIBRA with the Italian company of SKA.
|
|
|
Effect of food on fertility in assassin bug \kur{Platymeris biguttatus}
ZVONEK, Dalibor
This thesis was developed in order to determine whether the selected species most commonly kept feeding insects affect fertility in captive bred assassin bugs \kur{Platymeris biguttatus}. Used feeding insects were \kur{Blaptica dubia} roaches, \kur{Acheta domestica} crickets and larvae of \kur{Tenebrio molitor} bugs. The reason of using assassin bugs \kur{Platymeris biguttatus} was their popularity among breeders, their easy care needs and their superior fertility. Assassin bugs were kept in an air conditioned room with a constant temperature conditions and light regime. It has been shown that the given diet has no effect on fertility in this kind of bugs, also that breeding in groups has negative impact on fertility of this assassin bugs species. The results of this study could demonstrate the importance of proper feeding in keeping these bugs and help breeders to have better results.
|
|
|
Environmental aspects of eggs production from point of view of greenhouse gasses emissions
KALKUŠ, Václav
The aim of the study is to compare poultry farming focused on either conventional or organic egg production. Detailed information has been gathered in particular organizations by the means of questionnaires and provided technical literature. We have concentrated on the monitoring of the emission impact on the environment, caused especially by feed material consumption, electricity consumption and farm dung management. Based on the gathered data the emission burden was calculated by the means of Ecoinvent database using CO2 equivalent. We have compared the individual systems of management and evaluated greenhouse gasses production. The main target of the thesis was to find out whether the production of organic eggs has smaller impact on the environment than the conventional one.
|
|
|
Cost management in selected farm company
LÍSKOVCOVÁ, Eva
The thesis is focus on means of tracking and cost management in selected farm company. The first part is devote to theoretical and methodological basis of costs and calculate the costs that are obtained from the literature and then applied to the farm company. Further thesis is focus on selected performances (rape, eggs), the development costs of these performances in each year and the application of their calculations that the farm company use and application of the calculation method, which in agriculture is not so common. Here I use microeconomic knowledge in decision making firms not only on the optimal output.
|
|
|
Optimization of artificial spawning of pikeperch (Sander lucioperca) using HCG and new ways of removing artificial stickiness of eggs before incubation.
BLECHA, Miroslav
The object of the thesis is to experimentally find the most suitable method of artificial spawning of pikeprech, using hormonal stimulation of ovulation in females hormonal medication containing HCG. After scraping of the broodstock and after artificial fertilization of eggs obtained experimentally test new methods of artificial stickiness removing of eggs and then evaluate the success of artificial incubation of stripped, fertilized and unstickeness eggs of pikeprech. Experiments that are part of the thesis have been divided into several sub-experiments. In the first experiment was observed effect of different doses of hormonal Chorulon, containing the active substance HCG, the basic indicators of reproductive females. Was evaluated as spawning synchronization, spawning success, the number of spontaneous spawnings, fertility of females and hatching rate of eggs. The used HCG doses were 250, 500, 700 and 1000 IU per kilogram of body weight. All eggs were deprived of stickiness using a mixture of talc and milk. In the second experiment was carried out comparing different types of removes stickiness solutions. Here was evaluated especially time and labor intensity and the influence of various solutions on fertilization and hatching rate of eggs. In this trial was all pikeperch females injected the same amount of HCG hormone 500 IU per kilogram of body weight. Tested solutions was a mixture of talc and milk, just eggs wash water and the solution of various concentrations alkalase. The amount alkalase was 0,5; 1; 1,5; 2 and 5 ml, which are mixed with distilled water, so that the total volume of the solution was 1000 ml. The third experiment was supposed to simulate the pilot plant mass propagation of pikeperch females. All females received the same amount of hormone 500 IU of HCG per kilogram of body weight. All eggs were deprived of stickiness using a mixture of talc and milk. In the last experiment was one of the methods tested, which could limit the number of spontaneous spawning during the artificial spawning of pikeperch. To prevent spontaneous spawning were selected females (all were injected with 500 IU of HCG per kilogram of body weight) sewing genitourinary papilla. The incubation of eggs collected during all the experiments were used Zugské bottle.
|
|
| |
guest ::
