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首页> 外文期刊>Environmental toxicology and chemistry >CO-EXPOSURE TO SUNLIGHT ENHANCES THE TOXICITY OF NATURALLY WEATHERED DEEPWATER HORIZON OIL TO EARLY LIFESTAGE RED DRUM(SCIAENOPS OCELLATUS) AND SPECKLED SEATROUT (CYNOSCION NEBULOSUS)
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CO-EXPOSURE TO SUNLIGHT ENHANCES THE TOXICITY OF NATURALLY WEATHERED DEEPWATER HORIZON OIL TO EARLY LIFESTAGE RED DRUM(SCIAENOPS OCELLATUS) AND SPECKLED SEATROUT (CYNOSCION NEBULOSUS)

机译：共同暴露于阳光下会增强天然风化的深层地平线油对早期繁殖的红色转鼓（SCIAENOPS OCELLATUS）和有斑纹的山OUT（cynoscion nebulosus）的毒性

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The 2010 Deepwater Horizon oil spill resulted in the accidental release of millions of barrels of crude oil into the Gulf of Mexico. Photo-induced toxicity following co-exposure to ultraviolet (UV) radiation is 1 mechanism by which polycyclic aromatic hydrocarbons (PAHs) from oil spills may exert toxicity. Red drum and speckled seatrout are both important fishery resources in the Gulf of Mexico. They spawn near-shore and produce positively buoyant embryos that hatch into larvae in approximately 24 h. The goal of the present study was to determine whether exposure to UV as natural sunlight enhances the toxicity of crude oil to early lifestage red drum and speckled seatrout. Larval fish were exposed to several dilutions of high-energy water-accommodated fractions (HEWAFs) from 2 different oils collected in the field under chain of custody during the 2010 spill and 3 gradations of natural sunlight in a factorial design. Co-exposure to natural sunlight and oil significantly reduced larval survival compared with exposure to oil alone. Although both species were sensitive at PAH concentrations reported during the Deepwater Horizon spill, speckled seatrout demonstrated a greater sensitivity to photo-induced toxicity than red drum. These data demonstrate that even advanced weathering of slicks does not ameliorate the potential for photo-induced toxicity of oil to these species. (C) 2016 SETAC
机译：2010年的Deepwater Horizo​​n溢油事故导致数百万桶原油意外释放到墨西哥湾。共同暴露于紫外线（UV）下后，光诱导的毒性是一种机制，通过这种机制，溢油中的多环芳烃（PAH）可能发挥毒性作用。红鼓和有斑纹的生肖都是墨西哥湾的重要渔业资源。它们在近岸产卵，产生正浮力的胚胎，大约在24小时内孵化成幼虫。本研究的目的是确定暴露于自然阳光下的紫外线是否能增强原油对生命早期的红鼓和有斑点的座位的毒性。在2010年溢油事故中，幼鱼鱼暴露于在监管链下从田间收集的2种不同油中提取的几种高能水调节级分（HEWAF）稀释液中，并通过析因设计暴露了3种自然阳光。与单独暴露于油相比，与自然光共同暴露于幼虫会大大降低幼虫的存活率。尽管两个物种对“深水地平线”泄漏期间报告的PAH浓度均敏感，但有斑点的座位展示出的对光诱导毒性的敏感性要比红鼓高。这些数据表明，即使浮油的高级风化也不能改善油对这些物种的光诱导毒性的潜力。 （C）2016年SETAC

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