Journal
BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
Volume 101, Issue 3, Pages 314-319Publisher
SPRINGER
DOI: 10.1007/s00128-018-2413-6
Keywords
Oman crude oil; Dispersant; Zebrafish embryo; Morphological development; Toxicity assessment
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Funding
- National Natural Science Foundation of China [412761058, 51479016, 51308083]
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This study focused on comparing the lethal and sublethal toxicity of water-accommodated fractions (WAF) and chemically enhanced WAF (CEWAF) of crude oil to zebrafish (Danio rerio) on early life stages (ELS). Results showed that the addition of GM-2 dispersant caused an increase in the levels of total petroleum hydrocarbons (TPHs) and total priority polycyclic aromatic hydrocarbons (I PAHs) pound. Based on I PAHs pound, the LC20 estimates for WAF and CEWAF were 4.88 A mu g L-1 and 1.19 A mu g L-1, respectively, indicating that CEWAF was approximately four times more toxic. CEWAF exposure caused markedly lower hatching rates and higher malformation frequencies than WAF. Meanwhile, the general morphology score (GMS) values in CEWAF were about fourfold lower than that in WAF, indicating that CEWAF exposure induced more significant developmental delay. The results suggested that chemical dispersant enhanced the toxicity of crude oil to zebrafish on ELS and its application could increase the exposure of fishes to crude oil.
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