alexa Temperature dependent mortality and behavioral changes in a freshwater mussel Lamellidens marginalis to dimethoate exposure.
Chemical Engineering

Chemical Engineering

Journal of Analytical & Bioanalytical Techniques

Author(s): Kumar S, Pandey RK, Das S, Das VK

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Abstract Temperature is a crucial determinant of biogeography, directly affecting the behavioral responses of the organisms. An acute static bioassay was conducted to evaluate the effect of temperature on dimethoate toxicity in a freshwater mussel Lamellidens marginalis. The mussel, were exposed for 96 hr at different concentrations of dimethoate (155.00, 160.00, 165.00, 170.00, 175.00, 180.00, 185.00, 190.00, 195.00, and 200.00 mgl(-1)) in the month of January when water temperature was 14.9 +/- 1.2 degrees C and at concentration 35.00, 37.00, 39.00, 41.00, 43.00, 45.00, 47.00, and 49.00 mgl(-1) in the month of August when the water temperature was 28.0 +/- 0.5 degrees C. The LC50 values were calculated from the mortality data obtained (using EPA-Probit analysis version 1.5, statistical software). The 96 hr LC50 value recorded at higher temperature was 36.34 mgl(-1) and at low temperature was 163.59 mgl(-1). The mussel exposed at higher temperature showed more sensitive behavioral responses like huge mucus secretion, sudden closure of shell valves, quick post-mortem changes and increased oxygen consumption in comparison to exposure at low temperature. Therefore, the increasing threat of global warming increases the risk of pesticide toxicity in the exposed organisms.
This article was published in J Environ Biol and referenced in Journal of Analytical & Bioanalytical Techniques

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