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Seasonal Variations in the Concentrations of Metals in Crassostrea corteziensis from Sonora, México


This study examines seasonal variations in the concentrations of Cd, Cu, Pb, and Hg in experimentally cultured Crassostrea corteziensis, an oyster species known to have high resistance to physical and chemical stressors. The highest levels of Cd (4.92 mg/kg), Cu (3.45 mg/kg), and Pb (0.67 mg/kg) were detected in oyster samples collected during the summer, while Hg concentrations were similar (0.03 to 0.04 mg/kg) throughout all seasons. Results indicate that except for Cd, Crassostrea corteziensis accumulates metals to levels below those recommended by the US. FDA and the Mexican government. For Cd, its concentration correlates more strongly with the temperature of the oyster’s environment rather than to the oyster growth cycle.

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This work was supported by funds provided by Consejo Nacional de Ciencia y Tecnología (CONACyT). The authors thank Dr. Jorge Chávez-Villalba for providing the oysters and to Perlas del Mar de Cortez for providing its culture facilities for this experiment.

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Correspondence to L. García-Rico.

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García-Rico, L., Tejeda-Valenzuela, L. & Burgos-Hernández, A. Seasonal Variations in the Concentrations of Metals in Crassostrea corteziensis from Sonora, México. Bull Environ Contam Toxicol 85, 209–213 (2010).

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  • Metals
  • Crassostrea corteziensis
  • Bioconcentration factor
  • Human consumption
  • Gulf of California