Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6356760 | Marine Pollution Bulletin | 2015 | 12 Pages |
Abstract
The explosion of the Deepwater Horizon (DWH) oil platform resulted in large amounts of crude oil and dispersant Corexit 9500A® released into the Gulf of Mexico and coincided with the spawning season of the oyster, Crassostrea virginica. The effects of exposing gametes and embryos of C. virginica to dispersant alone (Corexit), mechanically (HEWAF) and chemically dispersed (CEWAF) DWH oil were evaluated. Fertilization success and the morphological development, growth, and survival of larvae were assessed. Gamete exposure reduced fertilization (HEWAF: EC201 h = 1650 μg tPAH50 Lâ 1; CEWAF: EC201 h = 19.4 μg tPAH50 Lâ 1; Corexit: EC201 h = 6.9 mg Lâ 1). CEWAF and Corexit showed a similar toxicity on early life stages at equivalent nominal concentrations. Oysters exposed from gametes to CEWAF and Corexit experienced more deleterious effects than oysters exposed from embryos. Results suggest the presence of oil and dispersant during oyster spawning season may interfere with larval development and subsequent recruitment.
Keywords
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Oceanography
Authors
J. Vignier, L. Donaghy, P. Soudant, F.L.E. Chu, J.M. Morris, M.W. Carney, C. Lay, M. Krasnec, R. Robert, A.K. Volety,