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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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The role of academic library in disseminating grey literature – a case study: Adam Mickiewicz University Repository
Rychlik, Małgorzata
One of the main and crucial strategic projects that any university, or an institution of higher learning, has been recently involved in is the creation and development of an institutional repository. The AMUR repository as an open web-based archive of scholarly material originated in 2010 and has aggregated a collection of more than 11,000 diverse digital objects. This paper presents the types of documents that have been archived in the repository, focusing in particular on unconventional (grey) literature. The following key elements are presented: standards for metadata, archiving rules that specify the criteria for the type of data to be archived, access mode to specific resources and the purpose and structure of deposit licences for the AMUR institutional repository. In addition, the language coverage (Polish, official congress languages and other languages) as well as chronological range of the grey literature deposited with the repository are briefly discussed.
Fulltext: idr-936_3 -  PDF
Slides: idr-936_1 - PDF; idr-936_2 - PDF
Video: idr-936_4 -  MP4
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