Braune Birgit M, Malone Brian J
National Wildlife Research Centre, Canadian Wildlife Service, Environment Canada, Carleton University Raven Road, Ottawa, ON K1A 0H3, Canada.
Arch Environ Contam Toxicol. 2006 Feb;50(2):284-9. doi: 10.1007/s00244-005-7093-7. Epub 2005 Sep 16.
Total mercury and selenium were measured in livers of green-winged teal, northern pintails, buffleheads, king eiders, Barrow's and common goldeneyes, surf and white-winged scoters collected from 12 sites across northern Canada between 1988 and 1994. Hepatic mercury concentrations were <1.0 mg x kg(-1) ww in 80% of the birds analyzed. Mercury levels did not vary much among species, with green-winged teal, northern pintails, and white-winged scoters, in particular, generally having quite low levels (<0.5 mg x kg(-1) ww). Northern pintails had the lowest Se concentrations (<2.5 mg x kg(-1) ww) overall whereas the higher Se concentrations (10-20 mg x kg(-1) ww) were found in the king eiders and scoters. Selenium showed a much greater variation in concentrations, particularly in the king eiders and scoters. Hepatic mercury concentrations found in the waterfowl analyzed in this study were an order of magnitude lower than toxicological threshold levels found in the literature. However, hepatic selenium concentrations in 33% of the females exceeded 3.0 mg x kg(-1) ww and some king eiders as well as some surf and white-winged scoters contained hepatic selenium concentrations >10 mg x kg(-1) ww suggesting levels of potential concern.
1988年至1994年间，在加拿大北部12个地点采集的绿翅鸭、针尾鸭、斑头秋沙鸭、王绒鸭、巴罗氏金眼鸭、普通金眼鸭、黑腹绒鸭和白翅斑背潜鸭的肝脏中测量了总汞和硒含量。在分析的鸟类中，80%的肝脏汞浓度低于1.0毫克/千克湿重。汞含量在不同物种之间变化不大，尤其是绿翅鸭、针尾鸭和白翅斑背潜鸭，汞含量通常相当低（低于0.5毫克/千克湿重）。总体而言，针尾鸭的硒含量最低（低于2.5毫克/千克湿重），而王绒鸭和潜鸭的硒含量较高（10 - 20毫克/千克湿重）。硒含量的变化幅度要大得多，尤其是在王绒鸭和潜鸭中。本研究分析的水禽肝脏汞浓度比文献中发现的毒理学阈值水平低一个数量级。然而，33%的雌性水禽肝脏硒浓度超过3.0毫克/千克湿重，一些王绒鸭以及一些黑腹绒鸭和白翅斑背潜鸭的肝脏硒浓度超过10毫克/千克湿重，这表明存在潜在问题。
