Cefas Lowestoft Laboratory, Pakefield Road, Lowestoft, Suffolk NR33 0HT, UK.
Mar Pollut Bull. 2012 Jul;64(7):1485-94. doi: 10.1016/j.marpolbul.2012.05.024. Epub 2012 Jun 13.
Since 1990, tissue samples from UK-stranded and -bycaught cetaceans have been available for study of contaminant burdens. These have been used to study spatial and temporal trends in concentrations in UK waters, and to investigate potential associations between contaminants and health status. We describe the current status of cetaceans (primarily harbour porpoises, Phocoena phocoena) in UK waters in relation to pollution. Concentrations of BDEs, HBCD, and the organochlorine pesticides are declining. In contrast, concentrations of CBs have plateaued following earlier reductions due to regulation of use, and further reductions are likely to take decades. Blubber PCB concentrations are still at toxicologically significant levels in many harbour porpoises and regularly occur at even higher levels in bottlenose dolphins and killer whales due to their higher trophic level in marine food chains. Further reductions in PCB inputs into the marine environment are needed to mitigate risk from PCB exposure in these species.
自 1990 年以来，英国搁浅和误捕的鲸目动物的组织样本可用于研究污染物的负担。这些样本被用于研究英国水域中污染物浓度的时空趋势，并调查污染物与健康状况之间的潜在关联。我们描述了与污染有关的英国水域中鲸目动物（主要是港湾鼠海豚，Phocoena phocoena）的现状。BDEs、HBCD 和有机氯农药的浓度正在下降。相比之下，由于使用的监管，CBs 的浓度已经趋于稳定，而且进一步的减少可能需要几十年的时间。许多港湾鼠海豚的鲸脂 PCB 浓度仍然处于具有毒理学意义的水平，由于它们在海洋食物链中的营养级更高，在宽吻海豚和虎鲸中经常出现更高的水平。需要进一步减少 PCB 输入到海洋环境中，以减轻这些物种中 PCB 暴露的风险。
