Abstract
In order to simulate an offshore oil spill event, we assessed the acute toxicity of the non-dispersed and the chemically dispersed water-accommodated fraction (WAF) of crude oil using Louisiana sweet crude and Corexit® 9500A with juvenile Harris mud crabs (Rhithropanopeus harrisii), an important Gulf of Mexico benthic crustacean. The chemical dispersion of crude oil significantly increased acute toxicity of the WAF in juvenile mud crabs compared to naturally dispersed oil. The majority of the mortality in the chemically dispersed treatments occurred within 24 h. While higher concentrations of chemically dispersed WAF had no survivors, at lower concentrations surviving juvenile crabs displayed no long-term effects. These results suggest that if the juvenile crabs survive initial exposure, acute exposure to dispersed or non-dispersed crude oil may not induce long-term effects.
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Acknowledgments
The authors would like to thank Louisiana Sea Grant College Program for funding as well as two anonymous reviewers, Stanley Massett, Paul Bangs, Holly Rogers, Christopher Green, and Andrew Nyman for assistance with the project or manuscript.
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Full list of 74 target PAHs concentrations in the 100% chemically enhanced water-accommodated fraction (CE) and 100% water-accommodated fraction (WAF). ND stands for no detection (PDF 16 kb)
Appendix
Appendix
Full list of 74 target PAHs used to calculate the expanded total PAH concentration.
Constituent | ||
---|---|---|
cis/trans-Decaiin | C3-Phens/Anths | Benzo(b)fluoranthenea |
Cl-Decalins | C4-Phens/Anths | Benzo(k)fluoranthenea |
C2-Deca1ins | Relent | Benzo(a)fluoranthene |
C3-Decalins | DibenzothiopheneQDBI) | Benzo(e)pyrenea |
C4-Decalins | Cl-DBT | C30-Hopane |
Benzo(b)thiophenes | C2-DBF | Benzo(a)pyrenea |
Cl-Benzotbiophenes | C3-DBT | Perylenea |
C2-Benzotbiophenes | C4-DBT | Indeno(1,2,3-cd)pyrenea |
C3-Bcnzothiophcncs | Bcnzo(b)fluorene | Dibenz(a,h)anthracenea |
C4-Benzothiophenes | Fluoranthene (Tluors)a | Benzo(g,h,i)perylenea |
Naphthalenea | Pyrene (Pyrs)a | 4-Methyldibenzothiophene |
C1-Naphthalenes | C1-Fluors/Pyrs | 2-Methyldibenzothiophene |
C2-Naphthalenes | C2-Fluors/Pyrs | 1-Mcthyldibcnzothiophene |
C3-Naphthalenes | C3-Fluors/Pyrs | 3-Methylphenanthrene |
C4-Naphthalenes | C4-Fluors/Pyrs | 2-Methylphenanthrene |
Biphenyla | Naphrhobenzothiophene(NBT) | 2-Methylanthracene |
Acenapbthylenea | Cl-NBT | 9-Methylphenanthrene |
Acenaphthenea | C2-NB1 | 1-Methylphenanthrenea |
Fluorenea | C3-NBF | 2-Methylnaphthalenea |
G1-Flnorenes | C4-NBT | 1-Melthlnaphthalenea |
C2-Fluorenes | Benz(a)anthracenea | 2,6-Dimethylnaphthalenea |
C3-Fluorenes | Chrysenea | 2,3,5-Trimethylnaphthalenea |
Anthracene (Anths)a | Cl-Chrysenes | Carbazole |
Phenanthrene (Phens)a | C2-Chrysenes | |
Cl-Phens/Anths | C3-Cluysenes | |
C2-Phcns/Anths | C4-Chryscncs |
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Anderson, J.A., Kuhl, A.J. & Anderson, A.N. Toxicity of Oil and Dispersed Oil on Juvenile Mud Crabs, Rhithropanopeus harrisii . Bull Environ Contam Toxicol 92, 375–380 (2014). https://doi.org/10.1007/s00128-014-1216-7
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DOI: https://doi.org/10.1007/s00128-014-1216-7