Strand Jakob, Larsen Martin M, Lockyer Christina
National Environmental Research Institute, Department of Marine Ecology, P.O. Box 358, Frederiksborgvej 399, 4000 Roskilde, Denmark.
Sci Total Environ. 2005 Nov 1;350(1-3):59-71. doi: 10.1016/j.scitotenv.2005.02.038. Epub 2005 Apr 22.
The concentrations of butyltin (summation operatorBT=TBT+DBT+MBT) and mercury (Hg) were determined in the liver of 35 harbour porpoises (Phocoena phocoena), which were found dead along the coastlines or caught as by-catch in the Danish North Sea and the Inner Danish waters. In addition, three harbour porpoises hunted in West Greenland were analysed. High levels of butyltin and mercury, within the range of 68-4605 mg BT/kg ww and 0.22-92 mg Hg/kg ww, were found in the liver of the Danish harbour porpoises and both substances tend to accumulate with age. The levels in the harbour porpoise from West Greenland were 2.0-18 mg BT/kg ww and 6.3-6.9 mg Hg/kg ww, respectively. The concentrations of butyltin and mercury were both found to be higher in stranded than in by-caught harbour porpoises but only the butyltin concentration was significantly higher in stranded porpoises in the age group 1-5 years. These substances are suspected of inducing adverse effects on immune and endocrine systems in mammals and they may thereby pose a threat to the animals. This study suggests that organotin compounds are also important, when assessing the risks of contaminants on the health and viability of harbour porpoises in Danish waters.
测定了35头港湾鼠海豚（Phocoena phocoena）肝脏中的丁基锡（∑BT=TBT+DBT+MBT）和汞（Hg）浓度，这些港湾鼠海豚是在丹麦北海和丹麦内海的海岸线附近发现死亡的，或是作为兼捕渔获物捕获的。此外，还分析了在西格陵兰捕获的三头港湾鼠海豚。在丹麦港湾鼠海豚的肝脏中发现了高水平的丁基锡和汞，其含量范围分别为68-4605毫克丁基锡/千克湿重和0.22-92毫克汞/千克湿重，且这两种物质都倾向于随着年龄的增长而积累。西格陵兰港湾鼠海豚体内的含量分别为2.0-18毫克丁基锡/千克湿重和6.3-6.9毫克汞/千克湿重。研究发现，搁浅港湾鼠海豚肝脏中的丁基锡和汞浓度均高于兼捕渔获的港湾鼠海豚，但只有1-5岁年龄组搁浅鼠海豚的丁基锡浓度显著更高。这些物质被怀疑会对哺乳动物的免疫和内分泌系统产生不良影响，从而可能对动物构成威胁。这项研究表明，在评估丹麦海域污染物对港湾鼠海豚健康和生存能力的风险时，有机锡化合物也很重要。
