Inpact of fishery management on the structure and dynamics food sources and environmental conditions in selected fispond areas.

The observation was carried out in twenty fishponds in the surrounding of Vodňany and seven fisponds in the surrounding of Třeboň. The aim of the work was to evaluete the quality and quantity of the zooplankton depending on fish production. The samples were obtained and the observations were realized during the 4 years in Vodňany fishponds area and during the 2 years in Třeboň fishponds area. At first the samples were collected and data about the observed localities were organized. These data should explain changes in the aquatic ecosystems of these fishponds areas during the last decades

Evolution, onthogeny, and eco-ethological function of skin patterns in Felidae(Carnivora)

Katedra filosofie a dějin přírodních vědDepartment of Philosophy and History of ScienceFaculty of SciencePřírodovědecká fakult

Impact of fishery management on the structure and dynamics food sources and environmental conditions in fishponds

The observation was carried out in twenty fishponds in the surrounding of Vodňany for two years and the aim was to evaluate the quality and quantity of the zooplankton depending on fish production. The samples were obtained in 2006-2007 during the vegetation season, in the period of march-october. First the samples were collected and data about the observed locality were organized. The data should explain changes in the aquatic ekosystems in the area that occured in the last decades

Semantic function of the mammalian tail in the design of anal pole of the body

The tail in mammals is an important organ, which in contrast to most vertebrae, doesn't add to the motor function of their bodies. The use of the mamals' tail is much more varied and it can fulfill many different functions. This work includes a survey of these functions and analyzes collected data concerning 553 spieces of mammals across all families. The data includes information about the length of tail, the length of body, body mass, living environment and outer signs on the anal pole of these species. The resulting analysis concludes that the tail length is dependent both on the length of the mammal's body and its living environment. Outward signs of the tail depend on its length as well as the length of the body and the living environment. Distinctive tail ending and tail base probably fulfill a communicative function. The tail is more likely to have communication than cryptic significance

Compositions of terpenes in essential oils made of juniper berries

Juniper berries have many uses, but they are most famous as ingredients in the production of alcoholic beverages. The quality of an alcoholic beverage is affected by the composition of terpenes found in essential oil made of juniper berries. The presented paper deals with the composition of essential oils extracted from J. Communis L. berries obtained from seven areas in Slovakia. It was determined that juniper essential oil contains monoterpenes ranging from 54.5 to 63.1 % and sesquiterpenes ranging from 35.2 to 45.2 %. Dominant monoterpenes in juniper essential oil are is α-pinene, with its peak area % ranging from 27.77 % to 36.59 %, followed by myrcene (6.68 - 13.35 peak area %), D-limonene (0.83 - 3.76 peak area %) , γ-terpinene (0.17 - 1.1 peak area %), αterpinolene (0.46 - 1.17 peak area %). Dominant sesquiterpenes are germacrene-D (8.25 - 19.68 peak area %), germacrene-B (2.08 – 9.62 peak area %), β-elemene (0.43 – 3.86 peak area %), α-humulene (1.27 – 3.62 peak area %), β-caryophyllene (2.28 – 8.29 peak area %) and δ-cadinene (1.56 – 3.67 peak area %). Distillates characterized by different terpene profile compositions, especially in the content of α-pinene and myrcene, were obtained by fermentation of berries J. communis as well as J. oxycedrus and their subsequent extractive distilllation. The content of α-pinene (43.91 peak area %) and myrcene (20.98 peak area %) is higher in the distillate made from J. oxycedrus berries and the content of germacrene–D (9.84 peak area %) is higher in the distillate made from juniper J. communis