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Acute and chronic effects of testosterone and 4-hydroxyandrostenedione to the c...

Steroid compounds have been globally detected in surface waters. The ecological impacts of these biologically active chemicals are largely unknown. Toxicity of testosterone and 4-hydroxyandrostenedione was assessed for the freshwater cladoceran Daphnia magna. Acute toxicity tests showed that 6.20 mg L-1 of testosterone, the highest concentration tested, did not have effect on the daphnids, whereas 4-hydroxyandr...