Study of White Leg Shrimp (Litoppenaeus vannamei) of Shrimp Farming Complexes in Gomishan, Golestan Province, with the Perspective of Contamination by Heavy Metals and Risk Evaluation for Consumer

Subject Areas : Journal of Animal Biology

reza khalili ¹ , Reza Salighehzadeh ^{2 *} , Marjan Mosafer ³

1 - Department of Veterinary, Shoushtar Branch, Islamic Azad University, Shoushtar, Iran
2 - Department of Veterinary, Shoushtar Branch, Islamic Azad University, Shoushtar, Iran
3 - Department of Marine Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran

Received: 2024-08-15 Accepted : 2025-01-27 Published : 2025-06-18

Keywords: White Leg Shrimp (Litoppenaeus vannamei), Golestan Province, Heavy Metals, Risk Assessment,

Abstract :

Heavy metal pollution directly affects marine aquaculture such as shrimp farming. Heavy metals in the shrimp can be transferred to humans through the food chain. In this research, the concentration of heavy metals in the muscle tissue of western white-legged shrimp (Litopenaeusvannamei) was determined and the risk for consumers was assessed in the Gamishan shrimp breeding station of Golestan province. For this purpose, 30 samples were analyzed by atomic absorption after drying and chemical digestion. The data were analyzed using SPSS software. The different heavy metals were identified in shrimp samples, including arsenic (As), cadmium (Cd), mercury (Hg), lead (Pb), iron (Fe), copper (Cu), cobalt (Co), chromium (Cr), manganese (Mn), molybdenum (Mo), nickel (Ni), tin (Sn) and zinc (Zn). The average amount of As, Cd, Hg and Pb was 0.11-0.08, 0.01, 0.01 and 0.38-0.14 mg/kg, respectively. Sn and Ni had a lower average than other metals. Fe and Cu were the highest level, followed Zn and Mn. Co, Cr and Mo were the lowest level. A significant difference was reported between different sites in regarding Zn (p < 0.05). The concentration of all heavy metals was according to the standard limit (FAO/WHO). Continuous and daily consumption of this product for different age groups is not safe in terms of As and there is a risk, but it is safe for other metals. The results of this study suggest that the measurements to prevent the pollution of breeding ponds in Golestan province should be taken by the responsible authorities. It is possible to reduce the dangerous effects of heavy metals by monitoring, regularly examining and evaluating these mineral pollutants.

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