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Study on toxicity of four heavy metals to embryo and larval of Nibea miichthioides

Wu Dingxun; Hong Wanshu (Department of Oceanography, Xiamen University, Xiamen, 361005)  
This paper deals with the effects of four heavy metals Hg, Cu, Zn and Cr on the embry onic development and larval survival of Nibea miichthioides. Within the experimental concen trations, embryonic development was retarded; hatching rates of fertilized eggs were signifi cantly lower in the treated groups than those in the control and newly hatching larvae in the treated groups were deformed accordingly. On the basis of experimental data, LC_50 and safe ty concentrations of four heavy metals to the Nibea miichthioides larvae were calculated in 24,48, 72 and 96 hours. The experimental results show that the toxic order of these metals to the larval survival was Hg~2+Cu~2+Zn~2+Cr~6+.
【Fund】: 福建省自然科学基金!(C96008号)
【CateGory Index】: X503.225
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