Departamento de Ecoloxía e Bioloxía Animal, Facultade de Ciencias, Universidade de Vigo, Campus As Lagoas, 36310 Vigo, Spain.
Environ Pollut. 2010 May;158(5):1275-80. doi: 10.1016/j.envpol.2010.01.029. Epub 2010 Mar 1.
In this study, we measured via surgical sampling hepatic EROD activity in yellow-legged gulls from oiled and unoiled colonies, 17 months after the Prestige oil spill. We also analyzed stable isotope composition in feathers of the biopsied gulls, in an attempt to monitor oil incorporation into marine food web. We found that yellow-legged gulls in oiled colonies were being exposed to remnant oil as shown by hepatic EROD activity levels. EROD activity was related to feeding habits of individual gulls with apparent consequences on delayed lethality. Capture-recapture analysis of biopsied gulls suggests that the surgery technique did not affect gull survival, giving support to this technique as a monitoring tool for oil exposure assessment. Our study highlights the combination of different veterinary, toxicological and ecological methodologies as a useful approach for the monitoring of exposure to remnant oil after a large oil spill.
在这项研究中，我们通过手术取样测量了在 Prestige 号溢油事件 17 个月后，来自受污染和未受污染的繁殖地的黄腿海鸥的肝 EROD 活性。我们还分析了取自活检海鸥的羽毛中的稳定同位素组成，试图监测石油在海洋食物网中的摄入情况。我们发现，正如肝 EROD 活性水平所示，受污染繁殖地的黄腿海鸥正在接触残余石油。EROD 活性与个体海鸥的觅食习惯有关，这对延迟致死有明显影响。对活检海鸥的捕获-再捕获分析表明，手术技术并未影响海鸥的存活率，这为该技术作为评估石油暴露监测工具提供了支持。我们的研究强调了兽医、毒理学和生态学方法的结合，作为监测大型溢油事件后残余石油暴露的一种有用方法。
