Accumulation and elimination of cadmium and lead in juvenile milkfish during sublethal exposure |
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| Authors: | Narges Amrollahi Biuki Ahmad Savari Mohammadsedigh Mortazavi Hossein Zolgharnein Negin Salamat |
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| Affiliation: | 1. Department of Marine Biology, Faculty of Marine Science , Marine Science and Technology University , Khorramshahr, Iran bionab1@gmail.com;3. Department of Marine Biology, Faculty of Marine Science , Marine Science and Technology University , Khorramshahr, Iran;4. Persian Gulf and Oman Sea Ecology Research Center , Bandarabbas, Iran |
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| Abstract: | Pollution of aquatic environments by trace metals is a worldwide environmental problem. Metal pollutants are increasingly being released into the environment as a result of industrialization. In this study, the bioaccumulation of cadmium and lead in young juvenile milkfish liver (Chanos chanos) was investigated after exposure to three sublethal concentration of each pollutants (1/20, 1/10, and 1/5 LC50 of 96-h LC50) for acute time 12, 24, and 96 h and subchronically for 7, 14, and 21 days. Cadmium and lead accumulation in liver increased with the exposure period and concentrations of pollutant. Compared to controls, the uptake of cadmium is much higher than that of lead. Accumulation factors showed an increase with exposure time and for lead an inverse relationship between accumulation factor and exposure concentration. The elimination of the two pollutants during the 30 days depuration was investigated after 30 days depuration time. During this phase, cadmium and lead concentrations decreased. |
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| Keywords: | Chanos chanos heavy metal liver accumulation elimination |
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