Bioaccumulation of Metals in Pacific White-Leg Shrimp (Litopenaeus vannamei) and Sediment in Shrimp Farms of Gwatr Bay, Iran: Effects of Culture Cycle and Diet

• Mehran Loghmani ^[1] ; Parvin Sadeghi ^[1] ; Salim Sharifian ^[1]
  1. [1] Chabahar Maritime University, Chabahar, Iran
• Localización: Thalassas: An international journal of marine sciences, ISSN 0212-5919, Vol. 39, Nº. 2 (October 2023), 2023, págs. 755-763
• Idioma: inglés
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• Resumen

  • This study investigated the accumulation of Cu, Zn, Cd, Ni, and Pb in Pacific white-leg shrimp Litopenaeus vannamei and sediment in shrimp farms of Gwatr Bay, Iran during a 120-day culture cycle. Metal accumulation varied depending on the tissue type, period of culture cycle, and farm. Cu, Zn, and Pb concentrations were higher in shrimp tissues during the third period, while Pb, Zn, and Cd accumulation was higher in sediment during the first period. The accumulation rate of metals in shrimp tissues generally increased with the culture cycle, and the hepatopancreas had significantly higher levels of Zn, Cu, and Ni compared to muscle tissue. The sediment analysis revealed that the distribution of metals varied as Cd < Pb < Cu < Ni < Zn. The study identified body size and weight as important factors in the accumulation of heavy metals in farmed shrimp, and diet as a practical factor affecting metal accumulation in shrimp tissues and sediment. The weekly intake of metals was low and safe for human health. These findings suggest that the culture cycle and diet play a significant role in the bioaccumulation of metals in shrimp and sediment. The consumption of shrimp from these farms is safe for human consumption.