de Brito Ana P X, Ueno Daisuke, Takahashi Shin, Tanabe Shinsuke
Center for Marine Environmental Studies (CMES), Ehime University, Matsuyama, Japan.
Chemosphere. 2002 Jan;46(3):401-11. doi: 10.1016/s0045-6535(01)00183-7.
Persistent organochlorine (OC) and toxic butyltin compounds (BTs) were determined in walleye pollock (Theragra chalcogramma) collected from Gulf of Alaska, Bering Sea and Japan Sea, during 1991 and 1992. Polychlorinated biphenyls (PCBs) and dichlorodiphenyltrichloroethane (DDTs) and its metabolites were the most abundant compounds ranging up to 3200 and 2500 ng/g on lipid weight, respectively, followed by chlordane compounds (CHLs), hexachlorocyclohexane isomers (HCHs) and hexachlorobenzene (HCB) in the liver of walleye pollock. Concentrations of HCHs and HCB in walleye pollock from these remote areas were higher than those in fishes from the western North Pacific and Japanese coastal waters, indicating atmospheric transport of these compounds to higher latitude regions such as Bering Sea and Gulf of Alaska and/or local input around northern Japan Sea. The concentrations of other OCs were generally comparable to those in fishes from North Pacific Ocean and Japanese waters but significantly lower than in cod-like fishes from North Atlantic and European countries. Among sampling locations, walleye pollock from Japan Sea showed higher concentrations of DDTs and HCHs compared to fishes from Bering Sea and Gulf of Alaska, suggesting greater input of these compounds around Japan Sea. Slower declining trend of DDTs and CHLs and an increasing pattern of PCBs concentrations were found in walleye pollock from Bering Sea during 1982-1992. This may imply a continuous input of these compounds by long-range transport and/or long-term persistency in these cold regions. Compared to the fishes from Japan Sea, walleye pollock from Bering Sea and Gulf of Alaska showed higher proportions of alpha-HCH and p,p'-DDE in the composition of HCH isomers and DDT compounds, respectively. This suggests selective transportability of these compounds during long-range transport to higher latitude remote areas. Concentrations of tributyltin (TBT) in the muscle of walleye pollock ranged from 1.1 to 5.5 ng/g on wet weight. Concentrations of TBT in deep-sea walleye pollock from Gulf of Alaska and Bering Sea were lower than those in Japan Sea.
1991年至1992年期间，对从阿拉斯加湾、白令海和日本海采集的狭鳕（Theragra chalcogramma）中的持久性有机氯（OC）和有毒丁基锡化合物（BTs）进行了测定。多氯联苯（PCBs）、二氯二苯三氯乙烷（DDTs）及其代谢物是含量最高的化合物，以脂质重量计分别高达3200和2500纳克/克，其次是氯丹化合物（CHLs）、六氯环己烷异构体（HCHs）和六氯苯（HCB），存在于狭鳕肝脏中。这些偏远地区狭鳕体内的HCHs和HCB浓度高于北太平洋西部和日本沿海水域鱼类中的浓度，这表明这些化合物通过大气传输到了白令海和阿拉斯加湾等高纬度地区，和/或日本海北部周围的本地输入。其他OCs的浓度通常与北太平洋和日本水域鱼类中的浓度相当，但明显低于北大西洋和欧洲国家的鳕科鱼类中的浓度。在各个采样地点中，日本海的狭鳕体内DDTs和HCHs的浓度高于白令海和阿拉斯加湾的鱼类，这表明日本海周围这些化合物的输入量更大。1982年至1992年期间，在白令海的狭鳕中发现DDTs和CHLs的下降趋势较慢，而PCBs浓度呈上升趋势。这可能意味着这些化合物通过长距离传输持续输入，和/或在这些寒冷地区长期存在。与日本海的鱼类相比，白令海和阿拉斯加湾的狭鳕在HCH异构体组成中α-HCH的比例较高，在DDT化合物组成中p,p'-DDE的比例较高。这表明这些化合物在长距离传输到高纬度偏远地区的过程中具有选择性传输能力。狭鳕肌肉中三丁基锡（TBT）的浓度以湿重计在1.1至5.5纳克/克之间。阿拉斯加湾和白令海深海狭鳕体内的TBT浓度低于日本海。
