Wayland M, Gilchrist H G, Dickson D L, Bollinger T, James C, Carreno R A, Keating J
Environment Canada Prairie & Northern Wildlife Research Centre, 115 Perimeter Rd., Saskatoon, Saskatchewan, S7N 0X4, Canada.
Arch Environ Contam Toxicol. 2001 Nov;41(4):491-500. doi: 10.1007/s002440010276.
We determined concentrations of selected trace elements in tissues of king and common eiders at three locations in the Canadian arctic. Renal and hepatic cadmium concentrations in king eiders at a location in the eastern arctic were among the highest ever recorded in eider ducks: there, they were higher in king eiders than in common eiders. Cadmium concentrations were lower in king eiders from the western arctic than in those from the east. In the western arctic, cadmium concentrations did not differ between species. Hepatic mercury and zinc were higher in king eiders than in common eiders. Zinc and selenium were higher in eiders from the western arctic than in those from the eastern arctic. Trace element concentrations in these two duck species were below published toxicity thresholds. Positive correlations in trace element concentrations in both species were found between total and organic hepatic mercury, renal and hepatic cadmium as well as hepatic zinc, copper, mercury, and cadmium. Body mass of common but not king eiders and spleen mass of both species were negatively correlated with mercury concentrations. In common eiders, the number of nematode parasites was positively correlated with total and organic mercury. Histopathological evidence of kidney or liver lesions that are typical of trace metal poisoning was not found. We did not find evidence to support the hypothesis that trace metal exposure may be contributing to adverse effects on the health of individuals of these species.
我们测定了加拿大北极地区三个地点的王绒鸭和普通绒鸭组织中选定微量元素的浓度。在北极东部一个地点的王绒鸭肾脏和肝脏中的镉浓度是绒鸭中有记录以来最高的：在那里，王绒鸭的镉浓度高于普通绒鸭。来自北极西部的王绒鸭的镉浓度低于来自东部的。在北极西部，两个物种的镉浓度没有差异。王绒鸭肝脏中的汞和锌含量高于普通绒鸭。北极西部绒鸭体内的锌和硒含量高于北极东部的。这两种鸭体内的微量元素浓度低于已公布的毒性阈值。在这两个物种中，肝脏中总汞和有机汞、肾脏和肝脏中的镉以及肝脏中的锌、铜、汞和镉之间的微量元素浓度呈正相关。普通绒鸭的体重（王绒鸭体重无此关联）以及两个物种的脾脏质量与汞浓度呈负相关。在普通绒鸭中，线虫寄生虫数量与总汞和有机汞呈正相关。未发现典型的微量金属中毒引起的肾脏或肝脏病变的组织病理学证据。我们没有找到证据支持微量金属暴露可能对这些物种个体健康产生不利影响这一假设。
