Department of Fisheries and Oceans Institute of Ocean Sciences, Sidney, British Columbia, Canada.
Environ Toxicol Chem. 2011 Jun;30(6):1261-71. doi: 10.1002/etc.505. Epub 2011 Apr 4.
In the flesh (skinless fillet) of chinook, chum, coho, pink, and sockeye salmon (Oncorhynchus tshawytscha, O. keta, O. kisutch, O. gorbuscha, and O. nerka, respectively), sablefish (Anoplopoma fimbria) and walleye pollock (Theragra chalcogramma) from several sites in the northeast Pacific sampled between 2002 and 2008, tetra- and pentabrominated diphenyl ethers (BDEs) (BDE 47, 49, 99, and 100) dominated the congener distribution. Chinook and sablefish contained the highest concentrations, followed by sockeye, coho, and pink salmon, and pollock. In sockeye from the Bering Sea - Aleutians and from the Gulf of Alaska, total tri- to hepta-BDE concentrations fell significantly between 2002 and 2005; in sablefish from Gulf of Alaska, there was a steady but statistically nonsignificant decline in BDE concentrations between 2002 and 2008. Relative proportions of the main BDE congeners did not change appreciably over time, within species or location. All species except sockeye salmon showed a clear southeastward increase in BDE concentrations, implying an increasing gradient in general ecosystem contamination. In chinook, coho, and sablefish, especially, the southeastward trend in increasing total concentrations was associated with increasing proportions of BDEs 47 and 100. Chinook returning to western North American natal streams appeared to accumulate most of their PBDE burden towards the end of their migration. Fish from more northern sampling sites often had higher proportions of more highly brominated congeners than those from more southern sites, perhaps reflecting contamination from Asian sources where higher-brominated commercial PBDE formulations are used. In sablefish and pollock, the relative proportions of BDEs 99 and 47 varied inversely in almost a 1:1 ratio, implying debromination of BDE 99 to 47.
在 2002 年至 2008 年间，从东北太平洋的多个地点采集的虹鳟、银大麻哈鱼、金大麻哈鱼、粉鲑和红大麻哈鱼（Oncorhynchus tshawytscha、O. keta、O. kisutch、O. gorbuscha 和 O. nerka）、黑貂大麻哈鱼（Anoplopoma fimbria）和阿拉斯加狭鳕（Theragra chalcogramma）的去皮鱼片样本中，四溴和五溴二苯醚（BDEs）（BDE 47、49、99 和 100）占据了同系物分布的主导地位。虹鳟和黑貂大麻哈鱼的浓度最高，其次是红大麻哈鱼、金大麻哈鱼、粉鲑和阿拉斯加狭鳕。在白令海-阿留申群岛和阿拉斯加湾的红大麻哈鱼中，2002 年至 2005 年间，三至七溴代 BDE 的总浓度显著下降；在阿拉斯加湾的黑貂大麻哈鱼中，2002 年至 2008 年间 BDE 浓度呈稳步但无统计学意义的下降趋势。在同一物种或同一地点，主要 BDE 同系物的相对比例随时间变化不大。除红大麻哈鱼外，所有物种的 BDE 浓度均呈东南方向明显增加的趋势，表明一般生态系统污染呈逐渐增加的梯度。在虹鳟、银大麻哈鱼和黑貂大麻哈鱼中，尤其是总浓度东南方向增加的趋势与 BDE 47 和 100 的比例增加有关。返回北美西海岸出生地溪流的虹鳟似乎在其洄游的最后阶段积累了大部分 PBDE 负荷。来自更北采样点的鱼类通常比来自更南采样点的鱼类具有更高比例的高溴代同系物，这可能反映了来自亚洲的污染，亚洲使用更高溴化的商用 PBDE 配方。在黑貂大麻哈鱼和阿拉斯加狭鳕中，BDE 99 和 47 的相对比例几乎呈 1:1 的反比关系，这表明 BDE 99 向 47 的脱溴作用。
