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Registros recuperados: 4
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Impacts of Deepwater Horizon oil and associated dispersant on early development of the Eastern oyster Crassostrea virginica ArchiMer
Vignier, J.; Donaghy, L.; Soudant, P.; Chu, F. L. E.; Morris, J. M.; Carney, M. W.; Lay, C.; Krasnec, M.; Robert, Rene; Volety, A. K..
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....
Tipo: Text Palavras-chave: Deepwater Horizon oil; Oyster; Fertilization; CEWAF; Corexit; PAH.
Ano: 2015 URL: https://archimer.ifremer.fr/doc/00277/38853/42693.pdf
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Interactions between Crassostrea virginica larvae and Deepwater Horizon oil: Toxic effects via dietary exposure ArchiMer
Vignier, J.; Rolton, A.; Soudant, Philippe; Chu, F. L. E.; Robert, Rene; Volety, A. K..
The Deepwater Horizon (DWH) disaster released crude oil in the Gulf of Mexico for 87 days, overlapping with the reproductive season and recruitment of the oyster Crassostrea virginica. The pelagic larval life stages of C. virginica are particularly vulnerable to contaminants such as polycyclic aromatic hydrocarbons (PAHs) and oil droplets. Based on their lipophilic properties, PAHs and oil droplets can adsorb onto phytoplankton and filter-feeding C. virginica larvae may be exposed to these contaminants bound to suspended sediment, adsorbed onto algal and other particles, or in solution. This study examined the effects of exposure of C. virginica larvae to algae mixed with DWH oil. In a 14-day laboratory exposure, 5 day-old C. virginica larvae were exposed...
Tipo: Text Palavras-chave: Deepwater Horizon oil; Droplet; Oyster larvae; Dietary exposure; PAH.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00473/58423/61445.pdf
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Lethal and sub-lethal effects of Deepwater Horizon slick oil and dispersant on oyster (Crassostrea virginica) larvae ArchiMer
Vignier, J.; Soudant, P.; Chu, F. L. E.; Morris, J. M.; Carney, M. W.; Lay, C. R.; Krasnec, M. O.; Robert, Rene; Volety, A. K..
In April 2010, crude oil was spilled from the Deepwater Horizon (DWH) oil platform for 87 days, coincident with the spawning season and recruitment of the oyster, Crassostrea virginica, in the Gulf of Mexico. Impacts of acute exposures to surface-collected DWH oil (HEWAF), dispersed oil (CEWAF) and dispersant alone (Corexit 9500A®) on planktonic larval stages of C. virginica (veliger, umbo and pediveliger) were tested in the laboratory. Exposures to HEWAF, CEWAF and dispersant were toxic to larvae impairing growth, settlement success and ultimately survival. Larval growth and settlement were reduced at concentrations of tPAH50 ranging from 1.7 to 106 μg L−1 for HEWAF and 1.1–35 μg L−1 for CEWAF, concentrations well within the range of water sampled during...
Tipo: Text Palavras-chave: Deepwater Horizon oil spill; Crassostrea virginica; Corexit 9500A (R); Larvae; Growth; Settlement; PAH.
Ano: 2016 URL: https://archimer.ifremer.fr/doc/00345/45572/45181.pdf
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Sensitivity of eastern oyster ( Crassostrea virginica) spermatozoa and oocytes to dispersed oil: Cellular responses and impacts on fertilization and embryogenesis ArchiMer
Vignier, J.; Volety, A. K.; Rolton, A.; Le Goic, N.; Chu, F. -l. E.; Robert, Rene; Soudant, P..
The 2010 Deepwater Horizon (DWH) oil spill released millions of barrels of oil and dispersant into the Gulf of Mexico. The timing of the spill coincided with the spawning season of Crassostrea virginica. Consequently, gametes released in the water were likely exposed to oil and dispersant. This study aimed to (i) evaluate the cellular effects of acute exposure of spermatozoa and oocytes to surface slick oil, dispersed mechanically (HEWAF) and chemically (CEWAF), using flow-cytometric (FCM) analyses, and (ii) determine whether the observed cellular effects relate to impairments of fertilization and embryogenesis of gametes exposed to the same concentrations of CEWAF and HEWAF. Following a 30-min exposure, the number of spermatozoa and their viability were...
Tipo: Text Palavras-chave: Deepwater Horizon oil spill; Oyster; Spermatozoa; Oocyte; Flow-cytometry.
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00377/48851/51168.pdf
Registros recuperados: 4
Primeira ... 1 ... Última
 

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