|
|
Comparison of different ways of breeding, nutrition and controlled reproduction of Lota lota
ZÁVORKA, Milan
Based on the results reached after 216 days of experimentation with various breeding types, it can be said that the type of feed is not of paramount importance. This fact is based on the previous adaptation of submitted food, this is especially important for artificial feed. From our point of view, the more important factor is temperature, intensity and method of breeding. Prey selections choices involving 11 species of fish were performed on age groups of different burbot. All groups of burbot preferred the following species: grass carp, pikeperch, tench and stone moroko. The non-preferred species was ruffe. And different preferences were set for common carp, silver carp, burbot, sunfish and also for roach. The study evaluated reproductive parameters in burbot (Lota lota ) and focused on incubation time in two localities. Burbot spawning was observed from January to early February at an average temperature of 1.55 +- 0.9 °C in Borova Lada and 4.78 +- 0.11 °C in Mydlovary. For burbot at the age of 2+, at an average 1166 +- 100 were determined number of swollen eggs per gram. Relative fecundity was at 257260 +- 70678 eggs per kilogram of female. The absolute fecundity was at 24232 +- 6753 eggs.The last parameter evaluated was the incubation period. The average incubation period in the years 2020-2022 was 202 +- 24.55 °D in Mydlovary and 75.8 +- 16.67 °D in Borova Lada. In connection with artificial spawning, in this study, we further point out the possibility of peeling artificially spawn eggs with NaClO, in which we did not observe a negative effect.
|
|
|
Reproduction Burbot burbot (\kur{Lota lota}) and incubation of eggs at different temperatures in service
MIKEŠOVÁ, Lucie
The study evaluated the reproductive performance in Burbot burbot (Lota lota L.) and compared the incubation period at two locations. It was confirmed that the burbot wipes at the end of December and beginning of January with an average temperature of 1,93 ? 0,8 ° C. It was found that the content of the eggs in one gram is 3325 ? 248 pieces eggs and 1 ml is 1434 ? 24 pieces of eggs. Also, to evaluate the size of eggs before and after swelling. Size before swelling was 0,814 ? 8 mm and the swelling 0,838 ? 7,1 mm. Further, the absolute and relative fecundity and GSI, the absolute fecundity was 289,279 ? 204,759 pieces of eggs, the relative fertility of 763,523 ? 110,061 pieces of eggs per kilogram of body weight of fish and GSI was 23,15 ? 3.9%. The last parameter was rated incubation period. The incubation period was Vodňany 178,4 ° D and Borových Ladách 145,4 ° D.
|
|
|
The influence of incubation conditions on the evolution length of the selected Phasmatodea species
ŠIŠKOVÁ, Žaneta
The aim of this thesis is to compare the length of an incubation in eight types of incubators and to evaluate whether the different types of substrate have an influence on incubation pace of the selected Phasmatodea species. There were used Ramulus sp. species for this kind of experiment. The main criteria for selection of these Phasmatodea species were their relatively short incubation period, their easy breeding and availability. The incubation containers were placed in room conditions and regularly humified. The datalloger was used for humidity and temperature measurement. The shortest incubation period of 46 days was measured in the {\clqq}water bath`` incubator with an average relative humidity of 100 per cent. The longest incubation period of 56,5 days proved to be in the {\clqq}sand compost`` incubator with an average relative humidity of 70,9 per cent. The results of this thesis could help breeders of this kind of insect to breed in easier and especially more effective way.
|
|
|
MAJOR EPIDEMIOLOGICAL DISEASES AND POSSIBILITIES OF RESTRICTION ITS MALFEASANCE AND CONSEQUENTIAL SPREAD IN POPULATION
VAŇOVÁ, Naďa
In history there are cases of epidemics, which often reduced the human population more than war conflicts ever did. A typical example is the Spanish flu epidemic during the 1st World War. It is generally known that a large portion of our population lacks sufficient knowledge on the very dangerous diseases, which can be misused by bioterrorists. People underestimate the threat and often they don?t even have any idea how to protect themselves against biological agents or what to do in the event of a possible attack. I have chosen this issue as the topic of my diploma work as I consider the current situation of the inhabitant?s awareness of this issue as unsatisfactory. The objective of my work is to define epidemiologically serious diseases, which are suitable for misuse within the bioterrorists? actions, to focus on their diagnostics, treatment and prevention. On the basis of studying expert literature and consultations I have proposed preventative measures and instructions what to do in the event of a possible risk of attack by biological warfare agents and subsequently I created two types of information leaflets for the wide public. At the same time I handed over these two information leaflets for an expert assessment to a legal office to make sure that they do not fulfil the state of facts of a criminal offence of spreading a haux. The result is an opinion that the leaflet with general information may be used to increase peoples' awareness on the preventative protection against the possible risk of attack or misuse of biological agents. The second leaflet with the detailed information may only be used for the purpose of this diploma work, or possibly for training purposes of cooperation of the Integrated Emergency Services and the inhabitants in the given area.
|
|
| |
guest ::
