Rato Miléne, Gaspar Miguel B, Takahashi Shin, Yano Shinichi, Tanabe Shinsuke, Barroso Carlos
Departamento de Biologia, Universidade de Aveiro, 3810-193 Aveiro, Portugal.
Mar Pollut Bull. 2008 Jul;56(7):1323-31. doi: 10.1016/j.marpolbul.2008.04.004. Epub 2008 May 22.
Imposex and organotin (OT) tissue contamination of the netted whelk Nassarius reticulatus (L.) were assessed in the continental shelves around the main estuaries of the central coast of Portugal (Lisbon: Tagus estuary; Setúbal: Sado estuary) and the main coastal lagoon in the Southern of Portugal (Faro: Ria Formosa). Pollution levels were higher in areas of more intense boat traffic and shipyard activities and imposex showed a clear decreasing gradient from the estuaries to the offshore, in relation to a similar gradient of tissue contamination by tributyltin. Remarkably, imposex was extensively spread over the adjacent continental shelves of Tagus and Sado estuaries. The current work shows that TBT pollution is undoubtedly a matter of concern not only for the above estuaries where harbours are implanted but also for the adjacent continental shelves, regardless the massive dilution of contaminants that may occur in these deeper areas.
对葡萄牙中部海岸主要河口（里斯本：塔霍河河口；塞图巴尔：萨多河河口）周边大陆架以及葡萄牙南部主要沿海泻湖（法鲁：里亚福尔摩萨）中的网状蛾螺 Nassarius reticulatus (L.) 的性畸变和有机锡（OT）组织污染情况进行了评估。在船只交通更繁忙和造船厂活动更频繁的区域，污染水平更高，并且性畸变呈现出从河口到近海明显的递减梯度，这与三丁基锡的组织污染梯度相似。值得注意的是，性畸变在塔霍河和萨多河河口附近的大陆架广泛分布。当前研究表明，三丁基锡污染无疑不仅是在设有港口的上述河口需要关注的问题，对于相邻的大陆架也是如此，尽管在这些较深区域污染物可能会大量稀释。
