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首页> 外文会议>International Symposium Pioneering Studies of Young Scientists on Chemical Pollution and Environmental Changes >Contamination of Organotin Compounds in Finless Porpoises(Neophocaena phocaenoides)Stranded along Coastal Waters of Japan and Hong Kong
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Contamination of Organotin Compounds in Finless Porpoises(Neophocaena phocaenoides)Stranded along Coastal Waters of Japan and Hong Kong

机译：沿着日本和香港沿海水域陷入诸如悬浮的悬浮虫（Neophocaena phocaenoides）中有机素化合物的污染

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Organotins(OTs)including butyltin(BTs),octyltin(OcTs)and phenyltin(PTs)compounds were determined in various tissues and organs of finless porpoises stranded along coastal waters of Japan and Hong Kong.OTs were detected in all the samples analyzed.BTs were detected at the highest concentration in the liver and the lowest in fat tissues.On the other hand,triphenyltin(TPT)concentrations were rather uniform among the tissues and organs,suggesting the difference in accumulation mechanism between BTs and PTs.In the brain,trisubstituted OTs,tributyltin(TBT)and TPT,were accumulated as dominant compounds.OTs concentrations increased with growth,and no sex difference in the accumulation of OTs was observed.An estimated transplacental transfer rate and OTs concentration in milk indicate the low gestational and lactational transfer of these compounds.Finless porpoise in Hong Kong waters accumulated the highest hepatic concentrations of OTs,followed by those in Seto Inland Sea,Ise and Mikawa Bays and Pacific coast of Japan.Concentrations of BTs in the livers of finless porpoises from Ise and Mikawa Bays analyzed in this'study were lower than those reported on same species stranded along Ise Bay in 1994,reflecting the reduction of environmental release of TBT.However,from 1998 to 2003,no significant decreasing trend in OTs concentrations was observed in the liver samples of finless porpoises from Ise and Mikawa Bays.Concentrations of BTs found in some livers of finless porpoises exceeded the toxic thresholds of hepatotoxicity and immunotoxicity reported in in vivo and in vitro studies.These results suggest the continuous contamination by OTs and its toxic risk on finless porpoises in these areas.
机译：在沿着日本和香港沿海水域陷入困境的各种组织和器官中测定了包括丁酯（BTS），辛酸锡和苯并霉菌（PTS）化合物的有机汀（OTS），并在沿着日本和香港沿海水域陷入困境的各种组织中。在分析的所有样品中检测到。在肝脏的最高浓度下检测到脂肪组织中最低的最低浓度。另一方面，三苯基锡（TPT）浓度在组织和器官中相当均匀，表明BTS和PTS之间的积累机制差异。在大脑中， Trisubstited OTS，Tributyltin（TBT）和TPT累积为优势化合物，浓度随着生长而增加，并且观察到OTS的积累中没有性差异。估计的转血转移率和牛奶中的OTS浓度表明低妊娠和致辞这些化合物的转移。香港水域无情的海豚积累了最高的肝脏浓度，其次是濑户内海，伊斯州和Mikawa湾的人日本的ND Pacific海岸。从1994年分析的ISE和Mikawa Bays的紫外线和Mikawa Bays的BTS中BTS的间谍低于1994年沿着ISE海湾搁浅的同一物种的肝脏，反映了TBT的环境释放减少。然而从1998年至2003年开始，在ISE和Mikawa Bays的缺苗豚鼠肝脏样本中没有显着降低OTS浓度的趋势。在一些无悬浮液中发现的BTS的浓度超过了体内报告的肝毒性和免疫毒性的毒性阈值和体外研究。这些结果表明，在这些地区的无翅膀豚鼠上的含量和毒性风险的连续污染。

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