Institute of Marine Biodiversity and Evolutionary Biology, National Dong-Hwa University, Checheng, Pingtung, Taiwan; National Museum of Marine Biology and Aquarium, Checheng, Pingtung, Taiwan.
Institute of Marine Biodiversity and Evolutionary Biology, National Dong-Hwa University, Checheng, Pingtung, Taiwan.
J Hazard Mater. 2014 Jul 30;277:127-33. doi: 10.1016/j.jhazmat.2013.12.057. Epub 2014 Jan 4.
This study focuses on analyzing PBDEs in the liver, muscle, and blubber tissues of stranded dolphins (Stenella attenuate) on the Taiwan coast to determine and compare the PBDE levels and distributions among tissue types. Total concentrations of 19 PBDEs (ΣPBDE) in male dolphins (9.97 to 436ng/g fat) were significantly higher than in female animals (2.73 to 89.5ng/g fat), implying gender variation in bioaccumulation and the possibility of generation transfer from mother to fetus during pregnancy. The levels of contamination varied among tissue type; contamination was higher in blubber than that in muscle or liver, suggesting a possible transformation and redistribution of these compounds in body burden. Aside from gender and tissue type, ΣPBDE concentrations also significantly correlated with body length, an indicator of dolphin age. PCA analysis results showed no significant difference in PBDE congener pattern distributions in blubber tissues, indicating that blubber may be the final storage of contaminants in cetaceans, and that bioaccumulation of PBDEs may be dependent on chemical properties. BDE-154 and BDE-47 were the predominant PBDE congeners in stranded dolphins, and their correlation with body length suggests the significant metabolic depletion of BDE-154 in this species and possible exposure to both penta-BDE and octa-BDE mixtures.
本研究聚焦于分析台湾沿海搁浅海豚（短吻海豚）的肝脏、肌肉和鲸脂组织中的多溴联苯醚（PBDEs），以确定和比较组织类型之间的 PBDE 水平和分布。雄性海豚（9.97 至 436ng/g 脂肪）中 19 种 PBDEs（ΣPBDE）的总浓度明显高于雌性动物（2.73 至 89.5ng/g 脂肪），这表明生物蓄积存在性别差异，并且在怀孕期间母体向胎儿传递的可能性。污染程度在组织类型之间存在差异；鲸脂中的污染程度高于肌肉或肝脏，这表明这些化合物在体内负荷中可能发生转化和再分布。除了性别和组织类型外，ΣPBDE 浓度还与体长显著相关，体长是海豚年龄的指标。PCA 分析结果表明，鲸脂组织中 PBDE 同系物分布模式无明显差异，这表明鲸脂可能是鲸类动物中污染物的最终储存部位，而 PBDE 的生物蓄积可能取决于化学性质。BDE-154 和 BDE-47 是搁浅海豚中主要的 PBDE 同系物，它们与体长的相关性表明该物种中 BDE-154 的代谢明显耗竭，并且可能同时接触到五溴联苯醚和八溴联苯醚混合物。
