Facultad de Ciencias del Mar, Universidad Autónoma de Sinaloa, Paseo Claussen s/n, Mazatlán, Sinaloa, 82000, Mexico.
Instituto Politécnico Nacional, Centro Interdisciplinario de Investigación para el Desarrollo Integral Regional, Unidad Sinaloa, Boulevard Juan de Dios Bátiz Paredes No. 250, Guasave, Sinaloa, 81101, Mexico.
Bull Environ Contam Toxicol. 2023 Aug 2;111(2):20. doi: 10.1007/s00128-023-03776-8.
Total mercury (Hg) and selenium (Se) contents were determined in oysters Saccostrea palmula and Crassostrea corteziensis soft tissues from four coastal lagoons of the southeastern Gulf of California. The annual Hg mean concentrations for S. palmula (0.09 ± 0.04 µg g, wet weight) and C. corteziensis (0.08 ± 0.04 µg g) were similar (p ˃ 0.05) among the lagoons and did not exceed the limit established by the Norma Oficial Mexicana and World Health Organization (< 1.0 µg g Hg). On the other hand, the annual mean concentrations of Se for S. palmula (3.34 ± 0.96 µg g) and C. corteziensis (2.79 ± 0.89 µg g) were higher (p < 0.05) in El Colorado lagoon. The Se/Hg molar ratios were above 1; the positive selenium health benefit value index suggested that Se load in oysters could reduce the Hg potential toxic effect. The hazard quotient for Hg in both species was below 1. Therefore, the consumption of oysters does not represent a risk due to Hg ingestion.
总汞 (Hg) 和硒 (Se) 含量在东南加利福尼亚湾四个沿海泻湖的牡蛎 Saccostrea palmula 和 Crassostrea corteziensis 软组织中进行了测定。S. palmula（0.09±0.04 µg g，湿重）和 C. corteziensis（0.08±0.04 µg g）的年平均 Hg 浓度在泻湖之间相似（p ˃ 0.05），并未超过墨西哥官方标准和世界卫生组织规定的限值（<1.0 µg g Hg）。另一方面，S. palmula（3.34±0.96 µg g）和 C. corteziensis（2.79±0.89 µg g）在 El Colorado 泻湖的年平均 Se 浓度较高（p<0.05）。Se/Hg 摩尔比均高于 1；硒健康效益值指数为正，表明牡蛎中的硒负荷可以降低 Hg 的潜在毒性作用。两种物种的 Hg 危害商均低于 1。因此，由于摄入 Hg，食用牡蛎不会带来风险。
