alexa Abstract | Acute Effect of Chromium Toxicity on the Behavioral Response of Zebra Fish Danio Rerio


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Abstract

In aquatic ecosystems, domestic wastes as well as industrial effluents of heavy metal contaminants stand for predominant chemical form of the metal. Chromium is highly toxic to both aquatic and soil environment. Aim of the present study was to determine acute effect of chromium trivalent (Cr- III) and hexavalent (Cr-VI) toxicity on the behavioral response of zebra fish Danio rerio. The 96 hours LC50 of chromium trivalent and hexavalent was determined to be 105.279 mg/l and 26.03 mg/l by experimental fishes were exposed in different concentrations. Jerky movements, secretion of mucus, opening mouth for gasping, normal color change, erratic swimming, color turns were observed. Consequently fish moved to the corners of the experimental trough then loss of equilibrium followed by hanging vertically in water became death. The behavior showed that acute chromium toxicity is severely affects the fundamental organs and behavior which is harmful to fishes in aquatic ecosystem. There is need to control the usage of chromium especially Cr-VI because of its observed toxicity level.

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Author(s): Nisha. J.C.*, R. Raja Jeya Sekar and R. Chandran

Keywords

Pollution, Chromium, Acute toxicity, Zebra fish, plant sciences and Animal Sciences

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