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- W2078941168 abstract "The management of Czech fish ponds changed little from the Middle Ages until the end of the nineteenth century. The intensification of fish production was initiated during the first half of the twentieth century. During the 1930s, liming and manuring of the ponds became common. A greater density of stocking led to the use of artificial feeds in the form of pellets and grain. These changes in pond management have led to an increase in fish production from ≈ 50 to > 500 kg ha −1 year −1 over the last 5 decades. At the same time, the quality of the water and sediments has been deteriorating, and the functioning of the pond ecosystem has been disturbed. There are now massive blooms of phytoplankton, especially cyanobacteria, accompanied by great fluctuations in the oxygen concentration and pH. Data collected since 1925, when systematic research on the ponds started, allow the mechanisms responsible for the changes to be traced." @default.
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- W2078941168 date "2000-02-01" @default.
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- W2078941168 title "Impacts of long‐term changes in fishery management on the trophic level water quality in Czech fish ponds" @default.
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- W2078941168 doi "https://doi.org/10.1046/j.1365-2400.2000.00193.x" @default.
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