Departamento de Biología Animal y Edafología y Geología (Unidad Departamental de Ciencias Marinas), Universidad de La Laguna (ULL), La Laguna, 38206, Santa Cruz de Tenerife, Spain.
Grupo interuniversitario de Toxicología Alimentaria y Ambiental. Facultad de Medicina, Campus de Ofra, Universidad de La Laguna (ULL), La Laguna, 38071, Tenerife, Spain.
Environ Sci Pollut Res Int. 2018 Jul;25(21):21251-21256. doi: 10.1007/s11356-018-2550-9. Epub 2018 Jun 26.
The overexploitation of shark and ray fishing as well as anthropogenic pollution in the sea has led to a large decline in their population, and because sharks occupy a high trophic position in the ecosystem, they could have high concentrations of heavy metals such as Hg, Pb, and Cd. This study is based on seven species of demersal sharks which were caught in the Macaronesian archipelagos (Tenerife, Gran Canaria, and the Azores Archipelago). Hg and Pb concentrations were found in the present study to be below those reported in other comparative studies, with the highest reported values of Hg and Pb being 281,738 μg/kg for Pb in Deania profundorum (Smith & Radcliffe, 1912) and 264,30 μg/kg for Hg in Centrophorus uyato, Rafinesque, 1810. As for Cd, the values found here are higher than those in the literature, the highest reported concentration being 120.36 μg/kg in Centrophorus squamosus (Bonnaterre, 1788).
由于过度捕捞鲨鱼和鳐鱼以及海洋中的人为污染，它们的数量大量减少，而且由于鲨鱼在生态系统中处于较高的营养位置，它们可能含有高浓度的重金属，如汞、铅和镉。本研究基于在马卡罗内西亚群岛（特内里费岛、大加那利岛和亚速尔群岛）捕获的七种底栖鲨鱼。本研究发现汞和铅的浓度低于其他比较研究报告的浓度，报告的汞和铅的最高值分别为 281738μg/kg，用于铅在 Deania profundorum（Smith & Radcliffe，1912）和 26430μg/kg，用于 Hg 在 Centrophorus uyato，Rafinesque，1810。至于 Cd，这里发现的值高于文献中的值，报告的最高浓度为 120.36μg/kg，用于 Centrophorus squamosus（Bonnaterre，1788）。
