Knowledge Network Node
Marine Environmental Science. 2014, (03) Core

Acute toxicity of Hg2+ and Cd2+ to pearl oysters Pinctada maxima and Pinctada fucata juvenilesChinese Full Text

FAN Si-gang;HUANG Gui-ju;GUO Yi-hui;LIU Bao-suo;YU Da-hui;Key Laboratory of South China Sea Fishery Resources Utilization,Ministry of Agriculture;South China Sea Fisheries Research Institute,Chinese Academy of Fishery Sciences;

Abstract: Using static acute toxicity test,the effects of different concentrations of Hg2 +and Cd2 +on survivals of juveniles of pearl oysters Pinctada maxima（shell length 1. 03 ± 0. 15 cm） and P. fucata（shell length 1. 34 ± 0. 22 cm） were examined under the conditions of sea water temperature 24℃ 26℃ and salinity 33. 2. The results indicated that ! the LC50s（median lethal concentration） of 24 h,48 h,72 h and 96 h of Hg2 +for P. fucata juveniles were 0. 205 mg / L,0. 144 mg / L,0. 125 mg / L and 0. 123 mg / L,respectively and the safe concentration was 0. 001 23 mg / L,and these for P. maxima juveniles were 0. 306 mg / L,0. 206 mg / L,0. 192 mg / L and 0. 191 mg / L,respectively and the safe concentration was 0. 001 91 mg / L. The LC50s of 24 h,48 h,72 h,96 h of Cd2 +for P. fucata juveniles were 33. 937 mg / L,16. 643 mg / L,13. 957 mg / L and 12. 792 mg / L,respectively,and the safe concentration was 0. 127 92 mg / L,and theses for P. maxima juveniles was 45. 368 mg / L,22. 053 mg / L,14. 206 mg / L and 11. 824 mg / L,respectively,for P. maxima juveniles and the safe concentration was 0. 118 24 mg / L. It is suggested that Hg2 +has higher toxicity than Cd2 +in the pearl oysters and the tolerances to the metals between the two pearl oysters are not significant difference.
Keywords：

pearl oyster; juvenile; acute toxicity; Hg2 +; Cd2 +;

  • DOI：

    10.13634/j.cnki.mes.2014.03.004

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  • Classification Code：

    X174

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