Abstract
To predict the comparative toxicological response of synthetic detergents on aquatic ecosytems, the effects of various concentrations of neutralized alkyl benzene sulfonate were studied. The median tolerance limit at 48 hr, 95% confidence limit, slope function, presumable harmless concentration, and rate of survival of different species of aquatic fauna such as water fleas ( Daphnia magna), mosquito larvae ( Culex pipiens), slug worms ( Tubifex rivulorum), snails ( Lymnaea vulgaris), tadpoles ( Rana cyanophlyctis), and fish fingerlings ( Cirrhina mrigala) were followed at 0, 24, 48, 72, and 96 hr. Any effect on quality of the water was also tested after the addition of various concentrations of detergents. The results showed that water fleas are more susceptible to detergent toxicity than fish fingerlings, tadpoles, slug worms, snails, and mosquito larvae. Behavioral changes were also observed as an index for detergent toxicity. The relative toxicity of the detergents to various species is discussed in relation to selective ecotoxicological response.
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