중금속(Pb, Cr, As)이 넙치(Paralichthys olivaceus) 수정란 부화율에 미치는 독성 영향
분야
자연과학 > 생물
저자
박종수 ( Jong Soo Park ) , 박승윤 ( Seung Yoon Park ) , 황운기 ( Un Ki Hwang )
발행기관
한국환경생물학회
간행물정보
환경생물학회지(환경생물) 2012년, 제30권 제3호, 238~244쪽(총7쪽)
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23201137.pdf [무료 PDF 뷰어 다운로드]
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    영문초록
    Toxic effects of heavy metal (Pb, Cr, As) were examined by the hatching rates of fertilized eggs in the oliver flounder, Paralichthys olivaceus. Eggs were exposed to Pb, Cr, As (0, 10, 100, 500, 1,000, 2,500, 5,000 ppb) and then normal hatching rates were investigated after 48 h. The normal hatching rates in the control condition (not including heavy metal) were greater than 80%, but suddenly decreased with increasing of heavy metal concentrations. Pb, Cr and As reduced the normal hatching rates in concentration-dependent way and a significant reduction occurred at concentration grater than 100, 100, 500 ppb, respectively. The ranking of heavy metal toxicity was Cr¤ As¤Pb, with EC50 values of 415, 518 and 1,029 ppb, respectively. The no-observed-effect-concentration (NOEC) and lowest-observed-effect-concentration (LOEC) show each 100 bbp and 500 ppb of normal hatching rates in exposed to Pb and As. The NOEC and LOEC of normal hatching rates in Cr were 10 ppb and 100 ppb, respectively. From these results, the normal hatching rates of P. olivaceus have toxic effect at greater than the 100 ppb concentrations in Pb, As and the 10 ppb concentrations in Cr in natural ecosystems. These results suggest that biological assay using the normal hatching rates of P. olivaceus are very useful test method for the toxicity assessment of a toxic substance as heavy metal in marine ecosystems.
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