Abstract
In the south of Iraq, Malathion is frequently used in agricultural activities and over-fishing, significantly harming the environment and animals that live in the region's waterways.The 96-h LC50 toxicity of malathion was determined in Macrobrachium nipponense and the valuewas 61.27 µg/L. Based on the 96-h LC50 value, two concentrations (1:10 and 1:5 of the 96-h LC50)were selected as sublethal concentrations for 1 week exposure for histopathology analysis. Themost histopathological alterations in hepatopancreas were abnormal lumen ALU after 1 week ofexposure to Malathion with the sublethal concentration 6.12 µg/L. In the other sublethal concen-tration of Malathion 12.25 µg/L for 1 week exposure, abnormal lumen ALU; necrosis of epithelialcells NC; and necrosis of tubules were recorded.
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