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Although there is growing evidence that metals can be toxic to various aquatic species, there is still insufficient knowledge to integrate this information in environmental risk assessment procedures. In this study, we have investigated lethal Concentration (LC50) and toxicity effects of vanadium on mortality and growth of Artemia urmiana and Artemia franciscana. The in 24 h of A. urmiana and A. franciscana exposed to vanadium were 0.0107 and 0.011 mg/L respectively. In growth experiments, the length of animals was considered as growth index. Results indicates that the mean length of animals in (0.001, 0.002 and 0.003 mg/L) vanadium on first, 5th, 7th and 11th days of life significantly decreases in comparison with control groups (P<0.05). Bioaccumulation of vanadium in the same concentration, after 24 h in nauplius and also in adults of A. urmiana and A. fransicana were statistically significantly higher than of the control groups (P < 0.05). Both species accumulate vanadium in their bodies. However A. urmiana is more resistant to the heavy metals.
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