Highly Eutrophicated Fishponds - Effect of the Past Nutrient Input and Current High Fishstock - Results Of 20 Years Monitoring.
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F25173154%3A_____%2F15%3A%230000431" target="_blank" >RIV/25173154:_____/15:#0000431 - isvavai.cz</a>
Alternative codes found
RIV/25173154:_____/15:N0000003
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Highly Eutrophicated Fishponds - Effect of the Past Nutrient Input and Current High Fishstock - Results Of 20 Years Monitoring.
Original language description
Proceeding in: SEFS 9 - Symposium for European Freshwater Sciences. Abstract book. Geneva, Switzerland. s. 512. For centuries, more than 20 000 fishponds (man ?made shallow lakes) of size <1ha to 490ha form important hydrological system of the inland country - Czech Republic. During the 20th century, most of fishponds became eu- to hypertrophic both due to external nutrient loading (agriculture run off, municipal waste water) and fishery management (fertilizing, additional feeding). Fish stock and production rose and fish yield reached 1000kg/ha and even more. Mean concentrations of total nitrogen and phosphorus increased form less than 1 to 3mg/l and from 0.05 to 0.3 mg/l,respectively. Fertilizing of fishpons was reduced from 1990th. Fertilizing of agriculture fields declined in 1990 th and waste water treatment plants are being constructed. In spite of that fishponds remain heavily eutrophic. High phytoplankton biomass results in reduction of water transparency to less than 0.5m. Siz
Czech name
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Czech description
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Classification
Type
O - Miscellaneous
CEP classification
GL - Fishery
OECD FORD branch
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Result continuities
Project
<a href="/en/project/TE02000077" target="_blank" >TE02000077: Smart Regions - Buildings and Settlements Information Modelling, Technology and Infrastructure for Sustainable Development</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů