Nonylphenol is one of endocrine disruptors, as structurally stable, hydrophobic compounds exhibit high condensability and long-lasting in the natural environment. The purpose of this study was to determine the toxic effects of nonylphenol on Daphnia magna. In acute toxicity test, D. magna was exposed for 48 h at concentrations of 0, 10, 18, 32, 56 and 100 μg L-1 nonylphenol. In chronic toxicity test, D. magna were exposed through water for 21 days at concentrations of 0, 1.0, 1.8, 3.2, 5.6 and 10 μg L-1 nonylphenol. Acute toxicity was assessed on the basis of immobility, while chronic toxicity was assessed on the basis of fecundity. The acute toxicity test on nonylphenol was showed that the values of 24 h and 48 h EC50 were 25.0 μg L-1 and 13.7 μg L-1, respectively. In chronic test, fecundity was reduced significantly at 5.6 μg L-1 of nonylphenol. These results indicated that nonylphenol have some hazard for acute or chronic toxicity to freshwater invertebrate organism.

• 조태민(용인대학교 생명과학과) | Taemin Cho
• 김세화(용인대학교 생명과학과) | Saywa Kim Corresponding author
• 김판기(용인대학교 산업환경보건학과) | Pangyi Kim