Response of growth and development of Artemia saline to four kinds of heavy metals stress

Effects of Cr6+, Hg2+, Pb2+ and Zn2+ on the condition of Artemia saline growth and development were studied. The results showed that effects of four kinds of heavy metals stress on the condition of A. saline growth and development were remarkable or high-remarkable. Growth NOECs of Cr6+ at 24 h, 48 h, 72 h and 96 h were >0.28 mg/L, 0.2 mg/L, <0.04 mg/L and 0.24mg/L, development NOECs of Cr6+ at 24 h, 48 h, 72 h and 96 h were >0.28 mg/L, 0.12 mg/L, >0.28 mg/L and 0.12 mg/L; Growth NOECs of Hg2+ at 48 h, 72 h and 96 h were 1.0 mg/L and was <0.5 mg/L at 24 h, development NOECs of Hg2+ at 24 h, 72 h and 96 h were >2.5 mg/L and was <0.5 mg/L at 48 h; Growth NOEC of Pb2+ at 24 h, 48 h, 72 h and 96 h was 6 mg/L, 3 mg/L, <3 mg/L and <3 mg/L, development NOEC of Pb2+ at 24 h and 72 h was 6 mg/L and 15 mg/L and were <3 mg/L at 48 h and 96 h; Growth NOEC of Zn2+ at 24 h and 72 h was <0.04 mg/L and 0.04 mg/L and were >0.28 mg/L at 48 h and 96 h, development NOEC of Zn2+ at 24 h and 96 h were <0.04 mg/L and were >0.28 mg/L at 48 h and 72 h. All four kinds of ions obviously promoted the condition of A. saline growth and development in set concentrations except that 0.04 mg/L Cr6+ group offered inhibition of A. saline growth at seventy-second hour and 9 mg/L Pb2+ group offered inhibition of A. saline development at twenty-fourth hour. The condition of A. saline growth and development could be used to test toxicity of low concentration heavy metal ions.