巴西海洋哺乳动物中的人为和天然产生的有机溴化合物。
Anthropogenic and naturally-produced organobrominated compounds in marine mammals from Brazil.
机构信息
Biophysics Institute, Rio de Janeiro Federal University (UFRJ), Rio de Janeiro, Brazil; Aquatic Mammal and Bioindicator Laboratory (MAQUA), School of Oceanography, Rio de Janeiro State University (UERJ), Brazil.
Toxicological Centre, Department of Pharmaceutical Sciences, University of Antwerp, Belgium; Department of Chemistry, "Al. I. Cuza" University of Iassy, Romania.
出版信息
Environ Int. 2010 Jan;36(1):60-67. doi: 10.1016/j.envint.2009.10.001. Epub 2009 Oct 27.
Liver samples from 51 cetaceans, comprising 10 species, stranded between 1994 and 2006 in a highly industrialized and urbanized region in Southeast Brazil, were analyzed for polybrominated diphenyl ethers (PBDEs) and methoxylated-PBDEs (MeO-PBDEs). A concentration range of PBDEs (3-5960ng/g lw) similar to that observed in Northern Hemisphere dolphins was found. MeO-PBDE concentrations in continental shelf (CS) dolphins from Brazil are among the highest detected to date in cetaceans (up to 250microg/g lw). Higher SigmaMeO-PBDE concentrations were measured in CS and oceanic dolphins than in estuarine dolphins. The SigmaPBDE/SigmaMeO-PBDE ratio varied significantly ranging from a mean value of 7.12 to 0.08 and 0.01 for estuarine, CS and oceanic species, respectively. A positive correlation was observed between SigmaPBDE and year of stranding of male estuarine dolphins (Sotalia guianensis), which suggests temporal variation in the exposure. Placental transfer of organobrominated compounds was also evidenced in S. guianensis.
对 1994 年至 2006 年间在巴西东南部一个高度工业化和城市化地区搁浅的 51 头鲸目动物的肝脏样本进行了多溴二苯醚 (PBDEs) 和甲氧基化多溴二苯醚 (MeO-PBDEs) 的分析。发现 PBDEs 的浓度范围（3-5960ng/g lw）与北半球海豚中观察到的浓度相似。巴西大陆架（CS）海豚中的 MeO-PBDE 浓度是迄今为止在鲸目动物中检测到的最高浓度之一（高达 250μg/g lw）。CS 和海洋海豚中的 SigmaMeO-PBDE 浓度高于河口海豚。SigmaPBDE/SigmaMeO-PBDE 比值变化显著，范围从河口、CS 和海洋物种的平均值 7.12 到 0.08 和 0.01。在雄性河口海豚（Sotalia guianensis）中观察到 SigmaPBDE 与搁浅年份之间存在正相关关系，这表明暴露存在时间变化。在 S. guianensis 中还证实了胎盘对有机溴化合物的转移。
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