Acute Embryonic or Juvenile Exposure to Deepwater Horizon Crude Oil Impairs the Swimming Performance of Mahi-Mahi (Coryphaena hippurus)
详细信息 查看全文
- 作者：Edward M. Mager ; Andrew J. Esbaugh ; John D. Stieglitz ; Ronald Hoenig ; Charlotte Bodinier ; John P. Incardona ; Nathaniel L. Scholz ; Daniel D. Benetti ; Martin Grosell
- 刊名：Environmental Science & Technology
- 出版年：2014
- 出版时间：June 17, 2014
- 年：2014
- 卷：48
- 期：12
- 页码：7053-7061
- 全文大小：308K
- 年卷期：v.48,no.12(June 17, 2014)
- ISSN：1520-5851
文摘
The Deepwater Horizon incident likely resulted in exposure of commercially and ecologically important fish species to crude oil during the sensitive early life stages. We show that brief exposure of a water-accommodated fraction of oil from the spill to mahi-mahi as juveniles, or as embryos/larvae that were then raised for 25 days to juveniles, reduces their swimming performance. These physiological deficits, likely attributable to polycyclic aromatic hydrocarbons (PAHs), occurred at environmentally realistic exposure concentrations. Specifically, a 48 h exposure of 1.2 卤 0.6 渭g L鈥? 危PAHs (geometric mean 卤 SEM) to embryos/larvae that were then raised to juvenile stage or a 24 h exposure of 30 卤 7 渭g L鈥? 危PAHs (geometric mean 卤 SEM) directly to juveniles resulted in 37% and 22% decreases in critical swimming velocities (Ucrit), respectively. Oil-exposed larvae from the 48 h exposure showed a 4.5-fold increase in the incidence of pericardial and yolk sac edema relative to controls. However, this larval cardiotoxicity did not manifest in a reduced aerobic scope in the surviving juveniles. Instead, respirometric analyses point to a reduction in swimming efficiency as a potential alternative or contributing mechanism for the observed decreases in Ucrit.