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Avian communities of overgrown wetlands near fishponds in the Třeboň basin
Tuháček, Filip ; Hořák, David (advisor) ; Voříšek, Petr (referee)
Wetlands are one of the most unique and threatened biotopes on earth. Encroachment, mainly due to the cessation of traditional management leads to the appearance and spread of shrubs (mostly willows, Salix spp.). ey eventually change the appearance of the wetlands into forest- like habitats. is diploma thesis describes avian communities of overgrown wetlands and compares them with those of non-overgrown wetlands, i.e., reedbeds and low vegetation (mainly sedges, Carex spp.). Although the overgrown wetlands did not have the lowest species and population densities, in comparison with non-overgrown wetlands, the densities of wetland specialists and endangered species, such as Savi's Warbler (Locustella luscinioides), Bluethroat (Luscinia sve- cica), and Water Rail (Rallus aquaticus) were lowest in the willow-dominated wetland compared to non-overgrown. Due to the overgrowth of the wetland, the avian communities are more wo- odland and common bird species, such as Common Chiffchaff (Phylloscopus collybita), Willow Warbler (Phylloscopus trochilus), and Great Tit (Parus major). We also wanted to investigate and compare the invertebrate biomass in overgrown and non-overgrown wetlands. We wanted to find out how avian communities depend on the food resources in wetlands around the South Bohemian fish ponds....
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Hydronyms of the Česká Kanada region
ŠOJSLOVÁ, Klára
The bachelor thesis deals with hydronym of Česká Kanada region, specifically ponds and watercourses. The work is divided into two parts - theoretical and practical. The theoretical part is focused on basic knowledge from onomastics, toponomastics and hydronomastics. The second, practical part follows up particular hydronyms. In the beginning there are stated basic informations about given location that is Česká Kanada. The dictionary section is divided into running water and static water. Every individual entry is interpreted both from semantic aspect and word-formation. At last, hydronyms are classified by Šmilauer´s semantic sorting. Every dictionary section contains data summary.
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Ponds and lakes of South Moravia ceased to exist
Vaštík, Karel ; Doležal, Petr (referee) ; Králová, Helena (advisor)
This bachelor work deals with the research of extinct water bodies of South Moravia from the oldest mapped history till today. It analyzes their origin, development during the time and their extinct, and the gained findings illustrates on selected water bodies. It analyses also the restoration possibilities of selected lakes and ponds.
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The Revitalization of Mixed Use Zone Rybníky in Zlín
Hudečková, Petra ; Kotásek, Jiří (referee) ; Zemánková, Helena (advisor)
The main idea of the project is a gradual interpenetration of a town and nature and concurrently the free connection of the new projected area Rybníky and neighbouring quarter Prštné. And so the density of housing gradually becomes thinner and the density of vegetation thicker from the South to the North. At the same moment the form and function of buildings are changing. There is a sport area in greenery between Rybníky and Prštné as an open connection of new buildings in Rybníky and old ones in Prštné. Entrances of the area are defined by two dominant administration buildings. A local centre of the area is a park with a pavilion in its heart and a near public courtyard with café, kindergarten and the home for the elderly and singles. The projected area is full of cycle paths which connect the quarter and the Zlín city centre. The riverbank with a relaxation zone is created along the river Dřevnice.
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Floristicko-ekologická studie sinic a řas v různých typech stojatých vod na severním Plzeňsku
ČECHUROVÁ, Markéta
The algological research was realized on 10 various water bodies in the northern Pilsen region during the year 2020. They were mainly post-mining sites or artificial ponds, where plankton samples were collected. Environmental characteristics (pH, conductivity, water transparency, temperature, amount of nutrients) were measured. Cyanobacteria and algae found in samples were identified to the possible lowest taxonomic level, also relative abundance levels were stated. The relationship between environment and the species composition was studied. A total of 77 phytoplankton species were recorded.
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Rozvoj zooplanktonu v rybnících s produkcí rychlených stádií hospodářsky významných druhů ryb
PECHA, Oldřich
This master thesis was focused on zooplankton development in ponds with advanced fry rearing of economically important fish species. For the purpose of my study, we sampled pond cascade that is managed by Štičí líheň - ESOX, spol. s r.o. in the village Liderovice, near Tábor. In this particular pond cascade, the annual production of advanced fry of economically important fish species takes place, namely pike, pikeperch, carp, tench and grass carp. Importantly, pond cascade is used several times during one growing season, and zooplankton is the main food source of all early stages of rared fish. For the production of advanced fry of fish served 3 ponds, which were released and refilled 2-3 times a season. Fourth pond served as a control stocked with one year old carp throughout the whole season. The water from an upper pond in the cascade served as zooplankton inoculum to a lower pond after the pond harvesting. Statistical analyses showed that the fry of different fish species in ponds lying in the same cascade does not affect the composition of zooplankton after restocking and water refilling. The only difference we noticed was in the treatment with pikeperch, which partially does not share the food base of other monitored species.We also found out, that the occurrence of Cyclops vicinus, Daphnia magna, D. ambigua or D. pulicaria was positively correlated with increased P-PO4 concentrations. We also confirmed that pond ecosystem can effectively retain nutrients from basins and use them for its production. As was shown after a short rain when the measured concentration of total phosphorus in the inflow in our pond system was 0.50 mg/L, on the contrary in the last pond of our cascade we measured values below 0.08 mg/L. High transparency was maintained in the whole cascade throughout the monitoring period, and an adequate economic profit was generated. Such management can be applied to only a few ponds (systems).
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Potravní zdroje plůdku reofilních ryb v rybnících s instalovanými světelnými a barevnými atraktanty hmyzu
KAJGROVÁ, Lenka
The aim of this work was to evaluate the food base (zooplankton, zoobenthos and aerial insects) and production results in culture of two-year-old golden ide (Leuciscus idus aber. orfus) and chub (Squalius cephalus). The specifics of the study were to use the attractants (yellow plates) and submersed lights as a supplement to the nutrition of farmed fish. Experimental rearing took place in the earth ponds in the area of Experimental Fish Culture Facility in Vodňany (Czechia) and in the storage ponds in Schlossfischerei Schönau bei Litschau (Austria). Zooplankton composition and physico-chemical parameters were monitored during regular two-week sampling periods. Monitoring of zoobenthos and terrestrial insects captured by attractants was performed at monthly intervals. Macrozoobenthos was sampled by Ekman Grab. After processing the samples in the laboratory, the benthic invertebrates were divided into three groups - Chironomidae, Oligochaeta and Varia. Zooplankton was collected by planktonic mesh in the 3 m long hauling and divided into the fraction of small zooplankton (Daphnidae < 499 micrometre, Copepoda < 999 and > 1000 micrometre and Others - small Cladocera), and into the fraction of coarse zooplankton (Daphnidae 500 - 999, Daphnidae 1000 - 1499 and > 1500 micrometre). Terrestrial insects were captured by installed attractants for a specified time period of day (colour attractants) or night (light attractants). The results show that the environmental conditions of the monitored ponds did not differ significantly. Abundance of coarse zooplankton in both experimental cultures was influenced by fish. The density of zoobenthos did not differ significantly. However, the values in the ponds with the lights were higher than in the control. According to the analysis of growth and production data, the installation of insect attractants as a supplementary measure to fish nutrition in aquaculture seems to be beneficial for production results. The average weight of golden ide increased during the growing season from the initial 4,3 g to 26,9 +- 4,9; 32,3 +- 6,5 and 41,2 +- 9,2 g in control ponds, ponds using lights and yellow plates, respectively. The differences between both control and experimental treatments as well as between lights and yellow plates were highly significant (p < 0,001). In the culture of chub using light attractants, the average fish weight increased from the initial 12,7 g to 41,9 +- 2,2 g, respectively to 26,7 +- 5,5 g in control. In both treatments, the production was analogously higher.
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