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Proceedings of the International Academy of Ecology and Environmental Sciences, 2026, 16(2): 35-40
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Article

Impact of organophosphate pesticides on oxygen consumption in the freshwater bivalve Lamellidens consobrinus

Pratibha Balasaheb Khapre1,2, Sanjay Martand Nikam2, Vikram Raghunath Kakulte3
1Research Centre, P.G. Department of Zoology, K.T.H.M. College, Nashik, (MS), India
2Department of Zoology, Arts, Commerce and Science College, Lasalgaon, Nashik, (MS), India

Received 1 January 2026;Accepted 15 January 2026;Published online 25 January 2026;Published 1 June 2026
IAEES

Abstract
Organophosphate pesticides like profenofos and quinalphos are commonly used against agricultural crop pests. These pesticides are found harmful to the freshwater bivalve like Lamellidens consobrinus. Pesticides enter in the body mainly through gills and affect the respiratory physiology. The present study was carried out to assess the impact of profenofos and quinalphos on the rate of oxygen consumption in the freshwater bivalve, Lamellidens consobrinus. Healthy specimens were exposed to sub lethal concentration (1/10th LC50 value of 96 hrs.) of the pesticides, profenofos (0.59 ppm) and quinalphos (0.412 ppm) for 10, 20 and 30 days. The oxygen consumption was estimated by Winkler's method in relation to control group. The rate of oxygen consumption in freshwater bivalve Lamellidens consobrinus after chronic exposure to the pesticides showed significant decrease after every 10 days as compared to controlled bivalves. The rate of oxygen consumption on 10th day of exposure was decreased by 13.00% in profenofos and 20.01% in quinalphos, on 20th day of exposure it was decreased by 17.54% in profenofos and 27.84% in quinalphos, on 30th day of exposure it was decreased by 23.96% in Profenofos and 34.37% in quinalphos. The rate of oxygen consumption was found to be decreased with increase in exposure period. It was also found that decrease in the rate of oxygen consumption was more in the bivalves exposed to quinalphos as compared to the bivalves exposed to profenofos.

Keywords oxygen consumption;organophosphates;profenofos;quinalphos;bivalve;Lamellidens consobrinus.


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