Abstract
Evaluation of heavy metal concentrations in Rutilus frisii kutum on the southern coast of the Caspian Sea (northern Iran)
Highlights
The Caspian Sea is located in the northern part of Iran and has an area of 378 400 km2 and a basin volume of 78 170 km3
Considering the economic and nutritional values of white fish (Rutilus frisii kutum) from the Caspian Sea and the adverse effects of heavy metals on water quality and the health of fish, this study aimed to determine the concentrations of cadmium, lead, chromium, and nickel in the muscle and liver of fish in five fishing center stations on the southern coast of the Caspian Sea
Description of the study area The studied area included the southern coast of the Caspian Sea between Astara and Tonekabon located in Guilan and Mazandaran provinces
Summary
The Caspian Sea is located in the northern part of Iran and has an area of 378 400 km and a basin volume of 78 170 km. Heavy metal contents in different tissues of fishes are determined by their concentrations in water and food, and can serve as a pollution bioindicator of aquatic ecosystems [7,8]. Fish have been widely used in assessing the quality of aquatic environments These organisms are often at the top of the aquatic food chain and may accumulate large amounts of heavy metals from the surrounding waters [9,10]. This research evaluated the concentrations of cadmium, lead, chromium, and nickel in liver and muscle tissues of Rutilus frisii kutum along the Caspian Sea coasts of northern Iran. In muscle: cadmium = 0.01-0.08; lead = 0.21.5; chromium = 0.7-2.7; nickel = 0.5-1.5 Mean contents of these heavy metals were higher in the liver than in muscle.
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