Sodium Dodecyl Sulphate induced acute toxicity and ethological responses to oligochaete worm Tubifex tubifex (Muller)

Vol-4 \| Issue-6 \| June 2019 \| Published Online: 10 June 2019 PDF ( 364 KB )
Author(s)
Ritwick Bhattacharya ¹; Arnab Chatterjee ²; Nimai Chandra Saha ³
¹Fishery and Ecotoxicology Research Laboratory (Vice-Chancellor’s Research Group), Department of Zoology, The University of Burdwan, Burdwan, 713104, West Bengal (India) ²Fishery and Ecotoxicology Research Laboratory (Vice-Chancellor’s Research Group), Department of Zoology, The University of Burdwan, Burdwan, 713104, West Bengal (India) ³Fishery and Ecotoxicology Research Laboratory (Vice-Chancellor’s Research Group), Department of Zoology, The University of Burdwan, Burdwan, 713104, West Bengal (India)
Abstract
The present study was conducted to evaluate the acute toxicity in terms of 96h LC50, and behavioral responses of an anionic surfactant Sodium Dodecyl Sulphate to an oligochaete worm Tubifex tubifex. All experiments were conducted in a static bioassay system, using increasing concentrations of SDS for 96 h duration. The LC50 values associated with 95% lower and upper confidence limits for the surfactant were determined statistically using Finney’s probit analysis method and were found to be 31.370 (26.610-36.981), 18.845 (15.153-23.437), 16.325 (13.285- 20.062) and 10.940 (8.414-14.224) mg/l at 24, 48, 72 and 96 h respectively. The result of regression analysis indicated that the mortality rate varied significantly (p<0.05) and is positively correlated with the increasing concentrations of surfactant. Variations in behavioural responses were also recorded upon addition of different concentrations of surfactant in different exposure periods (24, 48, 72 & 96 h).
Keywords
The present study was conducted to evaluate the acute toxicity in terms of 96h LC50, and behavioral responses of an anionic surfactant Sodium Dodecyl Sulphate to an oligochaete worm Tubifex tubifex. All experiments were conducted in a static bioassay system, using increasing concentrations of SDS for 96 h duration. The LC50 values associated with 95% lower and upper confidence limits for the surfactant were determined statistically using Finney’s probit analysis method and were found to be 31.370 (26.610-36.981), 18.845 (15.153-23.437), 16.325 (13.285- 20.062) and 10.940 (8.414-14.224) mg/l at 24, 48, 72 and 96 h respectively. The result of regression analysis indicated that the mortality rate varied significantly (p<0.05) and is positively correlated with the increasing concentrations of surfactant. Variations in behavioural responses were also recorded upon addition of different concentrations of surfactant in different exposure periods (24, 48, 72 & 96 h).
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