Abstract

Potassium permanganate (KMnO{sub 4}) is a strong oxidizing agent and is commonly used in aquatic systems to improve available oxygen, treat infectious diseases and parasites, detoxify fish poisons, and control algae. There have been some studies on the toxicity of KMnO{sub 4} to freshwater fishes, but none on brackish or marine water species. The following study was undertaken to determine the 24- and 96-h median lethal concentration (LC50) of milkfish fingerlings to KMnO{sub 4}. The study was also designed to evaluate the histopathological response of fish tissues to KMnO{sub 4} but was reported in another paper.

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