Impacts of Deepwater Horizon oil and associated dispersant on early development of the Eastern oyster Crassostrea virginica
|Author(s)||Vignier J.1, 2, Donaghy L.1, Soudant P.2, Chu F. L. E.3, Morris J. M.4, Carney M. W.4, Lay C.4, Krasnec M.4, Robert Rene5, Volety A. K.1|
|Affiliation(s)||1 : Florida Gulf Coast Univ, Coll Arts & Sci, Dept Marine & Ecol Sci, Ft Myers, FL 33965 USA.
2 : IUEM UBO, Technopole Brest Iroise, Lab Sci Environm Marin UMR LEMAR 6539, F-29280 Plouzane, France.
3 : Virginia Inst Marine Sci, Coll William & Mary, Dept Aquat Hlth Sci, Gloucester Point, VA 23062 USA.
4 : Abt Associates Inc, Boulder, CO 80302 USA.
5 : IFREMER, Unite Littoral, Ctr Bretagne, F-29280 Plouzane, France.
|Source||Marine Pollution Bulletin (0025-326X) (Pergamon-elsevier Science Ltd), 2015-11 , Vol. 100 , N. 1 , P. 426-437|
|WOS© Times Cited||22|
|Keyword(s)||Deepwater Horizon oil, Oyster, Fertilization, CEWAF, Corexit, PAH|
|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 L− 1; CEWAF: EC201 h = 19.4 μg tPAH50 L− 1; Corexit: EC201 h = 6.9 mg L− 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.|