Falahudin Dede, Herandarudewi Sekar M C, Hukom Frensly Demianus, Arifin Zainal, Wulandari Ita, Sudaryanto Agus, Hoang Anh Quoc, Watanabe Isao, Takahashi Shin
The United Graduate School of Agricultural Sciences, Ehime University, 3-5-7 Tarumi, Matsuyama 790-8566, Japan; Center of Advanced Technology for the Environment (CATE), Graduate School of Agriculture, Ehime University, 3-5-7 Tarumi, Matsuyama 790-8566, Japan; Research Center for Oceanography, National Research and Innovation Agency, Pasir Putih 1, Ancol Timur, Jakarta 14430, Indonesia.
Research Center for Oceanography, National Research and Innovation Agency, Pasir Putih 1, Ancol Timur, Jakarta 14430, Indonesia.
Sci Total Environ. 2023 Jun 25;879:163008. doi: 10.1016/j.scitotenv.2023.163008. Epub 2023 Mar 24.
Short-finned pilot whales (SFPW) are a group of cetaceans found globally in tropical and temperate seas and are commonly stranded in the group, but the reason behind their stranding is still unknown. No detailed information on the contamination status and bioaccumulation of halogenated organic compounds, including polychlorinated biphenyls (PCBs), in the SFPW from Indonesian waters has been reported. Therefore, we analyzed all 209 PCB congeners in the blubber of 20 SFPW specimens stranded along the coast of Savu Island, East Nusa Tenggara, Indonesia, in October 2012 to explain the status of contamination, congener profiles, potential risk of PCBs to cetaceans, and the determination of unintentionally produced PCBs (u-PCBs) in the blubber of SFPW. Concentrations of Σ209PCBs, Σ7in-PCBs, Σ12dl-PCBs, and Σ21u-PCBs were between 48 and 490 (mean:240 ± 140), 22-230 (110 ± 60), 2.6-38 (17 ± 10), and 1.0-13 (6.3 ± 3.7) ng g lipid weight (lw), respectively. Congener-specific profiles of PCBs among sex and estimated age groups were observed; relatively high proportions of tri-to penta-CBs in juveniles and highly chlorinated recalcitrant congeners in structure-activity groups (SAGs) in sub-adult females were noted. The estimated toxic equivalency (TEQs) value for dl-PCBs ranged from 2.2 to 60 TEQ pg/g lw, with juveniles containing high TEQ values than sub-adults and adults. Although the TEQs and concentrations of PCBs in SFPW stranded along Indonesian coasts were lower than those reported for similar whale species from other North Pacific regions, further research is needed to assess the long-term impact of halogenated organic pollutants on their survival and health.
短鳍领航鲸是一类在全球热带和温带海域均有发现的鲸类动物，它们常常群体性搁浅，但搁浅背后的原因仍不明晰。目前尚无关于印度尼西亚海域短鳍领航鲸体内包括多氯联苯（PCBs）在内的卤代有机化合物污染状况及生物累积情况的详细报道。因此，我们对2012年10月在印度尼西亚东努沙登加拉省萨武岛沿岸搁浅的20头短鳍领航鲸样本的鲸脂中所有209种多氯联苯同系物进行了分析，以阐释污染状况、同系物谱、多氯联苯对鲸类动物的潜在风险，以及短鳍领航鲸鲸脂中无意产生的多氯联苯（u-PCBs）的测定情况。Σ209PCBs、Σ7in-PCBs、Σ12dl-PCBs和Σ21u-PCBs的浓度分别在48至490（均值：240±140）、22至230（110±60）、2.6至38（17±10）和1.0至13（6.3±3.7）纳克/克脂质重量（lw）之间。观察到了不同性别和估计年龄组之间多氯联苯的同系物特异性谱；注意到幼年个体中三至五氯联苯的比例相对较高，而亚成年雌性个体的结构活性组（SAGs）中高度氯化的难降解同系物比例较高。dl-PCBs的估计毒性当量（TEQs）值在2.2至60 TEQ皮克/克lw之间，幼年个体的TEQ值高于亚成年和成年个体。尽管在印度尼西亚沿岸搁浅的短鳍领航鲸体内多氯联苯的TEQs和浓度低于其他北太平洋地区类似鲸类物种的报道值，但仍需进一步研究以评估卤代有机污染物对其生存和健康的长期影响。
