Effects of dispersed oil exposure on biomarker responses and growth in juvenile wolfish Anarhichas denticulatus

• Published in: Environmental science and pollution research international Vol. 23; no. 21; pp. 21441 - 21450
• Main Authors: Sandrini-Neto, L., Geraudie, P., Santana, M.S., Camus, L.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.11.2016; Springer Nature B.V
• Subjects: Acetylcholinesterase - metabolism; Anarhichas denticulatus; Animals; Aquatic Pollution; Atmospheric Protection/Air Quality Control/Air Pollution; Bioavailability; Biomarkers; Biomarkers - metabolism; Crude oil; Cytochrome P-450 CYP1A1 - metabolism; Earth and Environmental Science; Ecotoxicology; Endangered & extinct species; Environment; Environmental Chemistry; Environmental Health; Environmental science; Enzymes; Experiments; Fish; Hydrocarbons; Liver - drug effects; Liver - enzymology; Metabolites; Natural gas reserves; Oil reserves; Oil spills; Organisms; Perciformes - growth & development; Perciformes - metabolism; Petroleum - analysis; Petroleum - toxicity; Polycyclic Aromatic Hydrocarbons - analysis; Polycyclic Aromatic Hydrocarbons - toxicity; Research Article; Risk assessment; Seawater - chemistry; Studies; Toxicity; Toxicity Tests; Viscosity; Waste Water Technology; Water Management; Water Pollutants, Chemical - analysis; Water Pollutants, Chemical - toxicity; Water Pollution Control; Petroleum hydrocarbons; Biomarkers; Dispersant; Arctic; Crude oil; Biliary metabolites
• ISSN: 0944-1344; 1614-7499
• DOI: 10.1007/s11356-016-7359-9

This study evaluated the sensitivity of the wolfish Anarhichas denticulatus exposed to crude oil, comparing the effects of mechanically dispersed versus chemically dispersed oil using sub-lethal endpoints. To test the toxicity of this controversial technique, two experiments involving exposure of the organisms for 48 h were conducted. The first experiment assessed the effects of oil exposure on biomarker responses. The second experiment monitored the growth of juveniles over 5 weeks after exposure. Overall, this study demonstrated that polycyclic aromatic hydrocarbon (PAH) biliary metabolites, ethoxyresorufin- O -deethylase (EROD), and acetylcholinesterase (AChE) are appropriate biomarkers to assess exposure of A. denticulatus . Growth rate, both in length and weight, was significantly higher in control compared to oil exposure treatments. The lack of differences between chemically and mechanically dispersed oils in biomarker response and growth suggests that dispersant application is no more toxic than the natural oil dispersion. The results indicate the potential for population-level effects resulting from exposure to oil.