Arsenic acute toxicity assessment on select freshwater organism species in Malaysia. Results indicated that Tubifex tubifex was most sensitive to arsenic toxicity compared to other organisms used in this study in this order Tubifex tubifex > Chironomus javanus > Rasbora sumatrana > Poecilia reticulata.Ĭitation: Nurul Akhma Zakaria, A.A.
Results showed that LT 50 and LC 50 increase with the decrease in mean exposure concentrations and times. The objective of this study is to determine the acute toxicity of arsenic concentration on Poecilia reticula, Rasbora sumatrana, Tubifex tubifex and Chironomus javanus. Mortality was assessed and median lethal times (LT 50) and concentrations (LC 50) were calculated. Two types of fish, namely Poecilia reticulata (guppy) (Poeciliidae) and Rasbora Sumatrana (Cyprinidae), an aquatic worm species Tubifex tubifex (Oligochaeta) and diptera midge larvae Chironomus javanus (Chironomidae) were exposed for a 4-day (96 h) period in laboratory conditions to a range of arsenic (As) concentrations. In this study, four freshwater organisms were used to evaluate arsenic toxicity levels. Recently, arsenic has contaminated the aquatic ecosystem, raising government and public environmental concern.
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