Consejo Nacional de Investigaciones Científicas y Técnicas, Museo Argentino de Ciencias Naturales Bernardino Rivadavia, Avenida Ángel Gallardo 470 (C1405DJR), Buenos Aires, Argentina.
Centro Bahía Lomas, Facultad de Ciencias, Universidad Santo Tomas, Avenida Costanera, 01834, Punta Arenas, Chile.
Environ Sci Pollut Res Int. 2021 Jun;28(24):31746-31757. doi: 10.1007/s11356-021-12890-1. Epub 2021 Feb 20.
On a global scale, cetaceans are recognized well indicators of marine ecosystem health. Trace elements accumulate in their bodies and potentially constitute a toxicological threat. Here, the concentrations of essential Se; unknown physiological elements Br, Rb, Cs, Ni, and Sr; and pollutants arsenic, Cd, Hg, and Ag were assessed in the skin of false killer whales (Pseudorca crassidens) stranded at Estrecho de Magallanes, South America, and next, tissue comparisons and relationships between elemental concentrations in the skin and internal tissues (liver, kidney, spleen, lung, skeletal muscle, and testis) were assessed. Results showed elemental concentration variations among tissues. Selenium concentration was found to be higher in the liver 398 (75) μg g dry weight (DW) (standard deviation in parenthesis), followed by skin. Rubidium and Br concentrations were higher in testis 7.92 (0.42) and 99.1 (5.4) μg g DW, respectively, and Cs in muscle 0.36 (0.12) μg g DW, while Ni concentrations range (<0.05-0.91 μg g DW) did not show differences among tissues. Cadmium and arsenic were found to be higher in kidneys, 71.2 (17.6) and 2.54 (1.77) μg g DW, respectively, while Hg was highest in the liver 1068 (234) μg g DW. Concerning inter-tissue relationships, a positive skin-to-kidney and skin-to-muscle correlations were observed for Cs concentrations, and also Hg showed positive skin-to-spleen, skin-to-kidney, and skin-to-testis correlations, which support its use as potential offshore marine biomonitor.
在全球范围内，鲸鱼被认为是海洋生态系统健康的良好指标。微量元素在它们的体内积累，可能构成毒理学威胁。在这里，评估了在南美的麦哲伦海峡搁浅的伪虎鲸（Pseudorca crassidens）皮肤中的必需元素硒；未知生理元素溴、铷、铯、镍和锶；以及污染物砷、镉、汞和银的浓度，然后评估了皮肤和内部组织（肝、肾、脾、肺、骨骼肌和睾丸）中元素浓度之间的组织比较和关系。结果表明，组织中的元素浓度存在差异。发现肝脏中的硒浓度较高，为 398（75）μg g 干重（DW）（括号内为标准差），其次是皮肤。铷和溴浓度分别在睾丸中较高，为 7.92（0.42）和 99.1（5.4）μg g DW，而铯在肌肉中为 0.36（0.12）μg g DW，而镍浓度范围（<0.05-0.91 μg g DW）在组织之间没有差异。发现镉和砷在肾脏中的浓度较高，分别为 71.2（17.6）和 2.54（1.77）μg g DW，而汞在肝脏中的浓度最高，为 1068（234）μg g DW。关于组织间关系，观察到 Cs 浓度在皮肤和肾脏之间以及皮肤和肌肉之间呈正相关，Hg 也在皮肤和脾脏之间、皮肤和肾脏之间以及皮肤和睾丸之间显示出正相关，这支持将其用作潜在的近海海洋生物监测器。
