DOI: /10.5513/JCEA01/12.1.890

Original scientific paper

Evaluation of acute toxicity of copper cyanide to freshwater fish, Catla catla (Hamilton)

2011, 12 (1)   p. 135-144



The acute toxicity of copper cyanide to the juveniles of Indian major carp Catla catla (2±0.5 cm) was evaluated under static renewal conditions. The concentrations of copper cyanide that killed 50% of the carp fingerlings within 96-h (96-h LC50) was found to be 0.76 ± 0.04 mg/L. Fishes exhibited abnormal swimming activity, followed by frequent gill flapping, loss of equilibrium, gulping of air, hyperactivity, convolutions. The respiratory rate of the fish got severely affected (-63.41%± 0.002) when exposed to copper cyanide.


behaviour, catla catla, copper cyanide, lc50, oxygen consumption


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