Bioaccumulation of nickel and vanadium values in liver and heart tissues of Acipenser persicus in the Southern Coast of Caspian Sea
Subject Areas : New Technologies in Aquaculture Development
Keywords: Caspian Sea, Acipenser persicus, oil pollution, Keywords: Heavy metals,
Abstract :
Abstract In recent years, Caspian Sea is exposed to oil pollution caused by the extraction and transportation of oil. This study was achieved to determine the ability to accumulate metals nickel and vanadium as an indicator of oil pollution in liver and heart tissues of Persian sturgeon (Acipenser persicus). So, study was performed on 27 samples of this species in the southern coast of the Caspian Sea in 2011. The samples were collected by the fisheries of the southern coast of the Caspian Sea and then into two workshops at shahid Behshti of Gilan and Shahid Marjani at Golestan Province were transferred. Heavy metals concentrations were determined by the atomic absorption device (shimadzu, AA-670). Nickel concentration in liver and heart tissues were measured 0.13 and 0.44 µg/g dry weight, and vanadium in liver and heart tissues 0.34 and 6.13 µg/g dry weight, respectively. Concentrations of the tested elements varied in the tissues in this sequence liver>heart for vanadium as well as liver>heart for nickel (P<0.05). Result revealed a significant difference between nickel and vanadium in liver and heart in (A. persicus). The high metal concentrations in liver could be due to the metabolically activities of this tissue. Also the lower concentration in heart could be due to blood pumping activity. The conclusion to draw is that the high concentration of vanadium, compared to nickel, in the different tissues of the studied samples and oil contamination in the Caspian Sea may be the main source for these metals.
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