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The loss of fish in lake nainital india as a result of pollution and parasitic infection

, : The loss of fish in lake nainital india as a result of pollution and parasitic infection. Gidrobiologicheskii Zhurnal 20(4): 58-63

High fish mortality in Lake Nainital, Kuman, India, is studied. High early winter mortality (Dec.-Jan.) is caused by the increased content of pollutants (such as dissolved organic matter, suspended organic matter, NH3, H2S and CH4) in the lake water. The lake remains somewhat polluted throughout the year. Early spring mortality (Feb.-March) is due to an extensive attack by parasites. The physicochemical hazards of environmental pollution to fish of the lake, actual mortality caused by them and parasites causing fish mortality are discussed.

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