Pastor D, Ruiz X, Barceló D, Albaigés J
Dept. of Environmental Chemistry, CID-CSIC, Barcelona, Spain.
Chemosphere. 1995 Sep;31(6):3397-411. doi: 10.1016/0045-6535(95)00192-b.
Polychlorinated biphenyls, dibenzodioxins and dibenzofurans were analysed in eggs of a protected gull species, the Audouin's Gull (Larus audouinii) and compared to those of the Yellow-legged Gull (Larus cachinnans), both breeding in the Western Mediterranean (Ebro Delta and Medes Islands, respectively). Differences in concentrations as well as in congener profiles reflected differences in both habitat and diet of the two species. Levels of AHH-active PCB congeners were lower in Yellow-legged Gull (0.4-1.6 micrograms/g d.w) than in Audouin's Gull eggs (1.2-33.9 micrograms/g d.w.). These concentrations, expressed in international toxic equivalence factors (i-TEQ/g d.w.), were on average 24 times higher in the Audouin's gull. I-TEQ levels due to dioxins were also higher in this species by a factor of ca. 7. I-TEQ levels related to PCBs resulted 90-230 times higher than those of dioxins and furans. Thus, AHH-inducing PCBs might represent even higher toxicological hazards than dioxins and furans to some populations of seabirds. The necessity of assessing the impact of these compounds in rare and protected species is pointed out.
对一种受保护的鸥类——地中海鸥（Larus audouinii）的卵中的多氯联苯、二苯并二恶英和二苯并呋喃进行了分析，并与黄腿鸥（Larus cachinnans）的卵进行了比较，这两种鸥分别在地中海西部（埃布罗三角洲和梅德斯群岛）繁殖。浓度以及同系物谱的差异反映了这两个物种在栖息地和饮食方面的差异。黄腿鸥卵中诱导芳烃羟化酶（AHH）的多氯联苯同系物水平（0.4 - 1.6微克/克干重）低于地中海鸥卵（1.2 - 33.9微克/克干重）。以国际毒性当量因子（i - TEQ/克干重）表示时，地中海鸥卵中的这些浓度平均高出24倍。该物种中二恶英导致的i - TEQ水平也高出约7倍。与多氯联苯相关的i - TEQ水平比二恶英和呋喃的水平高90 - 230倍。因此，对于一些海鸟种群而言，诱导AHH的多氯联苯可能比二恶英和呋喃具有更高的毒理学危害。文中指出了评估这些化合物对珍稀和受保护物种影响的必要性。
