Kajiwara Natsuko, Kamikawa Satoko, Amano Masao, Hayano Azusa, Yamada Tadasu K, Miyazaki Nobuyuki, Tanabe Shinsuke
Center for Marine Environmental Studies, Ehime University, 2-5 Bunkyo-cho, Matsuyama 790-8577, Japan.
Environ Pollut. 2008 Nov;156(1):106-14. doi: 10.1016/j.envpol.2007.12.034. Epub 2008 Feb 12.
Polybrominated diphenyl ethers (PBDEs) and organochlorine compounds (OCs) were determined in the blubber of 55 melon-headed whales (Peponocephala electra) mass stranded along the Japanese coasts since 1982. DDTs and PCBs were predominant in all the specimens investigated. In whales that died during the latest event in 2006, concentrations of PBDEs (190-510 ng/g lipid wt) were approximately two orders of magnitude lower than DDTs and PCBs, but comparable with HCHs and HCB. Maternal transfer of PBDEs to offspring through the whole reproductive process was estimated to be 85% of the mother's body burden, while that occurring during gestation was much lower (2.6-3.5%). Concentrations of PCBs, DDTs, and HCB were lower in melon-headed whales stranded after the year 2000 than those stranded in 1982, whereas PBDE and CHL levels showed a temporal increase during the past 20 years, suggesting that the peak of their usage and contamination occurred after the year 1982.
自1982年以来，对沿日本海岸大规模搁浅的55头瓜头鲸（Peponocephala electra）的鲸脂中多溴二苯醚（PBDEs）和有机氯化合物（OCs）进行了测定。滴滴涕（DDTs）和多氯联苯（PCBs）在所有调查样本中占主导地位。在2006年最近一次事件中死亡的鲸鱼中，多溴二苯醚的浓度（190 - 510纳克/克脂质重量）比滴滴涕和多氯联苯低约两个数量级，但与六氯环己烷（HCHs）和六氯苯（HCB）相当。据估计，多溴二苯醚在整个生殖过程中向后代的母体转移量为母体负荷的85%，而在妊娠期发生的转移量则低得多（2.6 - 3.5%）。2000年后搁浅的瓜头鲸体内多氯联苯、滴滴涕和六氯苯的浓度低于1982年搁浅的鲸鱼，而多溴二苯醚和氯丹（CHL）水平在过去20年中呈时间上的增加趋势，这表明它们的使用和污染高峰出现在1982年之后。
