Nature Environment and Pollution Technology

S. Umavathi ¹, K. Logankumar ¹, S. Subhashini ¹, S. Logaswamy ¹

Affiliations
1 P.G. and Research Department of Zoology, Kongunadu Arts and Science College (Autonomous), Coimbatore - 641 029, Tamilnadu, IN

Abstract

Among the environment, water is considered to be the most important since it forms the medium for aquatic life. Freshwater ecosystems are more productive and could be managed more effectively for human uses to supply drinking water and channel of water disposal and intercommunication. Present study is undertaken to estimate the productivity of freshwater Sulur pond located in Coimbatore district, Tamil Nadu.

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S. Logaswamy ¹, P. Soumya ¹, K. M. Remia ¹

Affiliations
1 P. G and Research Deptt. of Zoology, Kongunadu Arts and Science College, Coimbatore- 641 029, T. N., IN

Abstract

Effects of two organophosphorus insecticides, Dimethoate (30% EC) and Quinalphos on oxygen consumption of a freshwater fish Labeo rohita were investigated under lethal and sublethal toxicity in the present study. Median lethal concentration (LC₅₀) value of Dimethoate (30% EC) and Quinalphos of the fish were determined during bioassay study. The rate of oxygen consumption of the fish was studied under lethal and sublethal concentration of Dimethoate (30% EC) and Quinalphos at 1, 2, 3 and 4 hours intervals. It showed significantly decreased oxygen uptake. The experimental results depict that the organophosphorus pesticides Dimethoate (30% EC) and Quinalphos are toxic to the fish Labeo rohita and the stress response showed by the fish are dependent on concentration of toxicant and time of exposure.

Keywords

Oxygen Consumption, Respiration, Labeo rohita, Organophosphorus, Pesticides.

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