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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



mass death of aquatic animals, mainly fish.

It is caused by a decrease in the amount of oxygen dissolved in the water (to 5-30 percent of normal saturation) or by the appearance of toxic substances in the water (owing to the discharge of untreated industrial effluent or washing of toxic chemicals from land). The amount of oxygen decreases in bodies of water rich in organic matter (for example, bog water) and in stagnant water where algae (responsible for the blooming of water) and zooplankton are well developed. Fishkills generally occur in winter (from January to April) and at night in the summer in calm, warm weather. Fishkills sometimes occur in seas (for example, in the Sea of Azov in calm weather in summer). Certain fish (salmon, sturgeon, perch), crustaceans, and mollusks (pearly mussel, freshwater mussel) are particularly sensitive to an oxygen deficiency. Tench, Carassius, loach, chironomid larvae, and other organisms are less sensitive and survive longer. Control measures include saturating the water with oxygen and preventing toxic substances from entering the body of water.


Zernov, S. A. Obshchaia gidrobiologiia, 2nd ed. Moscow-Leningrad, 1949.


The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
In Manila, President Rodrigo Duterte has ordered government agencies to undertake measures to minimize the impact of the recent fishkill in Taal Lake.
Cuomo's office release stated that GlobalFoundries will be shifting production from Fab 10 (East Fishkill) to their other facilities, including Fab 8 in Malta, NY.
ON Semiconductor Corporation (Nasdaq: ON), a supplier of semiconductor-based solutions, and GLOBALFOUNDRIES, a specialty foundry delivering differentiated semiconductor technologies for a range of high-growth markets, announced on Monday the entering into a definitive agreement for ON Semiconductor to acquire a 300mm fab located in East Fishkill, New York.
The agreement allows ON Semiconductor to increase its 300mm production at the East Fishkill fab over several years, and allows for GlobalFoundries to transition its numerous technologies to the company's three other at-scale 300mm sites.
"At Fishkill, we were already on our cross-channel logistics journey of building out the shift from retail replenishment to online fulfillment when that fire happened," says Kuntz.
The increase in average interest bearing deposits from the first quarter 2018 partly reflected the acquisition of the Fishkill, N.Y.
Born in the back seat of a car, Carmel Fishkill was named for a freeway exit sign.
Honorable Mention: Gas Land Shell, East Fishkill, N.Y.
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The Wappinger Creek would be the first national Superfund cleanup in Dutchess County since the Hopewell Precision site in the Town of East Fishkill was added to the list in 2005.