Effect of water accommodated fraction of 0# diesel oil and crude oil on EROD activity of liver of Sparus macrocephlus and its mRNA expression

• EROD, CYP1A1 mRNA were used as biomarkers of diesel and crude oil exposure in fish.
• Differences in the profiles of EROD and CYP1A1 were found between diesel and crude oil exposures

We studied the effect of water accommodated fractions (WAF) of 0# diesel and crude oil on ethoxy resorufin o-deethylase (EROD) activity and CYP1A1 mRNA expression quantity in the liver of Sparus macrocephlus. We found that there were some differences in the EROD activity and CYP1A1 mRNA induction between these two petroleum hydrocarbons. Both the EROD activity and CYP1A1 mRNA expression of fish exposed to 0# diesel WAF were higher than those of crude oil WAF fish. The EROD activities and CYP1A1 mRNA expressions in the livers 0# diesel WAF exposed group declined faster than those of crude oil WAF and the recovery of EROD activity and CYP1A1 mRNA expression in the crude oil group was higher than that of 0# diesel group.