Toxic Effects of Several Heavy Metals on the Embryos Development of Spinibarbus hollandi
The present paper deals with the toxic effects of Cu2+ , Zn2+ , Cd2+ in different ion concentration and the joint toxicity of Cu2+ -Cd2+ and Pb2+ -Zn2+ on the embryos development of Spinibarbus hollandi by using the semi-static test method,under the condition of water temperature between 24-26℃ .The result suggests that the hatching rate of embryos incubated at the heavy metal solutions of different concentration is lower than the control, and the differences is extreme significant ( P < 0.01). Malformation of embryos was caused by the heavy metal element during the embryos development stage.The development speed of embryo was advanced in the experimental groups (Cu2+ ≥ 0.10 mg/L,Cu2+ -Cd2+ ≥0.50 mg/L,Pb2+ -Zn2+ ≥2.00 mg/L),but reduced in the rest of experimental groups of various concentration of metal solutions. The toxic effects of the heavy metals on the embryos development of S. hollandi are Cu2+ > Cd2+ > Zn2+ .The safe concentration of Cu2+ ,Cd2+ ,Zn2+ ,Cu2+ -Cd2+ ,Pb2+ -Zn2+ are 0.009 mg/L,0.065 mg/L,0.023 mg/L,0.011 mg/L,0.523 mg/L respectively.The joint toxicity of Cu2+ and Cd2+ to the S. hollandi is antagonistic.
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万方数据
维普
