Toxicity of Water-Accommodated Fractions (WAF), Chemically Enhanced WAF (CEWAF) of Oman Crude Oil and Dispersant to Early-Life Stages of Zebrafish (Danio rerio).
Bull Environ Contam Toxicol
; 101(3): 314-319, 2018 Sep.
Article
en En
| MEDLINE
| ID: mdl-30105540
ABSTRACT
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 (ΣPAHs). Based on ΣPAHs, the LC20 estimates for WAF and CEWAF were 4.88 µg L-1 and 1.19 µg 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.
Palabras clave
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Hidrocarburos Policíclicos Aromáticos
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Contaminantes Químicos del Agua
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Pez Cebra
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Petróleo
Límite:
Animals
País como asunto:
Asia
Idioma:
En
Año:
2018
Tipo del documento:
Article