Saiz Enric, Movilla Juancho, Yebra Lidia, Barata Carlos, Calbet Albert
Institut de Ciències del Mar, CSIC, Barcelona, Catalunya, Spain.
Environ Pollut. 2009 Apr;157(4):1219-26. doi: 10.1016/j.envpol.2008.12.011. Epub 2009 Jan 14.
Short-term (24h) exposure experiments have been conducted to determine the effects of two environmental relevant polycyclic aromatic hydrocarbons (PAHs), naphthalene (NAPH) and dimethylnaphthalene (C2-NAPH), on the naupliar and adult stages of the marine cyclopoid copepod Oithona davisae. To resemble more realistic conditions, those exposure experiments were conducted under the presence of food. The naupliar stages evidenced lower tolerance to PAH exposure regarding narcotic and lethal effects than adults. Copepod feeding activity showed to be very sensitive to the presence of the studied PAHs, detrimental effects occurring at toxic concentrations ca. 2-3 fold lower than for narcotic effects. In addition we report PAH-mediated changes in cell size and growth rate of the prey item, the heterotrophic dinoflagellate Oxyrrhis marina, that could indirectly affect copepod feeding and help explain hormesis-like responses in our feeding experiments.
已进行短期（24小时）暴露实验，以确定两种与环境相关的多环芳烃（PAHs），萘（NAPH）和二甲基萘（C2-NAPH），对海洋剑水蚤类桡足动物奥氏中剑水蚤无节幼体和成体阶段的影响。为了更接近现实条件，这些暴露实验是在有食物的情况下进行的。无节幼体阶段在麻醉和致死效应方面对PAH暴露的耐受性低于成体。桡足类的摄食活动对所研究的PAHs的存在非常敏感，有害影响出现在毒性浓度约为麻醉效应浓度低2-3倍的时候。此外，我们报告了PAH介导的猎物——异养甲藻海洋尖尾藻的细胞大小和生长速率的变化，这可能间接影响桡足类的摄食，并有助于解释我们摄食实验中的类激素反应。
