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Determination of acute mercury toxicity to developing stages of Cyprinus carpio and Cirrhinus mrigala

Sharad Shrivastava, K. S. Rao, Dhanekar, S., S.S. Pandya

Abstract

Toxicity of inorganic mercury to different life history stages of fresh water fishes, Cyprinus carpio and Cirrhinus mrigala were demonstrated by static bioassays. 48 and 94% of egg hatching occurred in controls at 72 and 24h of experimentation in C. carpio and C. mrigala respectively. While fish eggs in water containing mercuric chloride showed delayed development as compared to the control. LC50, LC100 and safe concentrations of hatchling, fry and fingerling were calculated. Hatchling and fry were observed to be more susceptible as compared to fingerlings of C. carpio and C. mrigala.

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Key concepts: Cyprinus, Hatchling, Carp, Hatching, Mercury (programming language), Biology, Toxicity, Veterinary medicine