Health & Environmental Research Online (HERO)


Print Feedback Export to File
2770576 
Journal Article 
Acute and chronic toxicity study of the water accommodated fraction (WAF), chemically enhanced WAF (CEWAF) of crude oil and dispersant in the rock pool copepod Tigriopus japonicus 
Lee, K; Shim, W; Yim, UnH; Kang, JH 
2013 
Yes 
Chemosphere
ISSN: 0045-6535
EISSN: 1879-1298 
England 
92 
9 (August 2013) 
1161-1168 
English 
23466279 
We determined the toxicity of the water accommodated hydrocarbon fraction (WAF), two chemically enhanced WAFs (CEWAFs; CEWAF-C, Crude oil+Corexit 9500 and CEWAF-H, Crude oil+Hiclean) of crude oil and two dispersants (Corexit 9500 and Hiclean) to the rock pool copepod Tigriopus japonicus. In the acute toxicity test, Corexit 9500 was the most toxic of all the chemicals studied. The nauplius stage of T. japonicus was more susceptible to the toxic chemicals studied than the adult female. The toxicity data using the nauplius stage was then considered as baseline to determine the spiking concentration of chemicals for chronic toxicity tests on the copepod. As the endpoints in the chronic toxicity test, survival, sex ratio, developmental time and fecundity of the copepod were used. All chemicals used in this study resulted in increased toxicity in the F1 generation. The lowest-observed-adverse-effect (LOAE) concentrations of WAF, CEWAF-H, CEWAF-C, Hiclean and Corexit 9500 were observed to be 50%, 10%, 0.1%, 1% and 1%, respectively. The results in present study imply that copepods in marine may be negatively influenced by spilled oil and dispersant. Copyright © 2013 Elsevier Ltd. All rights reserved. 
Animals; Chromatography, Gas; Toxicity Tests, Acute; Polycyclic Hydrocarbons, Aromatic; Petroleum; Index Medicus; Copepoda; Sex Ratio; Lipids; Lethal Dose 50; Toxicity Tests, Chronic; Water Pollutants, Chemical