Abstract
Caspian Sea has oil treasure as well as fisheries resources. One the most precious resources of fisheries are sturgeons. Crude oil is a very dangerous pollutant of water ecosystems which are in possession of oil resources. In the present study, juveniles beluga were exposed to four indirect doses (0, 10, 100, 500, and 1,000 ppm) of water-soluble fraction (WSF) of crude oil for 0 h, 48 h, and 7 days. The results showed that after 48 h of exposure, all biochemical indices (glucose, triglyceride, calcium, and protein) significantly increased (P ≤ 0.05). Furthermore, all biochemical indices showed significantly elevation after exposure to WSF of oil for 7 days (P ≤ 0.01). Among enzymatic parameters in both sampling times, alkaline phosphatase decreased and the aminotransferase and alanine aminotransferase increased along with different doses of WSF of crude oil exposure.
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