Elevated accumulation of tributyltin and its breakdown products in bottlenose dolphins (Tursiops truncatus) found stranded along the US Atlantic and Gulf coasts
Elevated accumulation of tributyltin and its breakdown products in bottlenose dolphins (Tursiops truncatus) found stranded along the US Atlantic and Gulf coasts
复制标题
DOI：
10.1021/es960657d
复制
发表时间：
1997-01-01
影响因子：
11.4
通讯作者：
Tanabe, S
中科院分区：
文献类型：
--
作者：
Kannan, K;Senthilkumar, K;Tanabe, S
丁基锡化合物，包括一(MBT)、二(DBT)和三丁基锡(TBT)，在1989-1994年间在美国大西洋和墨西哥湾东南部搁浅的宽吻海豚(Tursioptruncatus)的肝脏、肾脏和肌肉中被检测到。海豚肝脏中总丁基锡(BTS：MBT+DBT+TBT)含量在110~11340 ng/g(湿重)之间，平均值为1400 ng/g。宽吻海豚肝脏中的丁基锡含量高于其他地区的报告。1989年采集的一只成年雄性海豚的肝脏中Bt含量最高(11340 ng/g湿重)。丁基锡的浓度在生命的早期阶段增加，直到成熟，无论性别，然后趋于恒定。对从墨西哥湾收集的鱼肉的分析表明，最近存在技术性贸易壁垒的投入。BTS在海豚体内的生物放大系数平均为1.0，最高值为6.8。除了多氯联苯(PCB)外，TBT和DBT这两种潜在的免疫抑制剂的存在也可能是导致美国大西洋和墨西哥湾沿岸宽吻海豚死亡事件的原因之一。
Butyltin compounds, including mono- (MBT), di- (DBT), and tributyltin (TBT), were determined in the liver, kidney, and muscle of bottlenose dolphins (Tursiops truncatus) found stranded along the southeast U.S. Atlantic and Gulf coasts during 1989-1994. Total butyltin (BTs: MBT + DBT + TBT) concentrations in dolphin liver ranged between 110 and 11 340 ng/g (wet wt) with a mean value of 1400 ng/g. Butyltin concentrations in bottlenose dolphins were higher than those reported from other locations. The liver of a adult male dolphin collected in 1989 had the highest BT concentration (11 340 ng/g wet wt) reported. The concentrations of butyltins increased during the early life stages until maturity, for both sexes, and then tended to remain constant. Analysis of fish muscle collected from the Gulf of Mexico indicated the existence of recent inputs of TBT. The biomagnification factor of BTs in dolphins, on average, was 1.0 with the highest value of 6.8. In addition to polychlorinated biphenyls (PCBs), the presence of noticeable concentrations of TBT and DBT, which are potential immunosuppressing agents, might have also contributed to bottlenose dolphin mortality events in the U.S. Atlantic and Gulf coasts.