Chemical Dispersion of Crude Oil: Assessment of Physiological, Immune, and Antioxidant Systems in Juvenile Turbot (Scophthalmus maximus)

• Published in: Water, Air, & Soil Pollution
• Main Authors: Theron, Michael, Bado-Nilles, Anne, Beuvard, Christian, Danion, Morgane, Dussauze, Mathieu, Pichavant-Rafini, Karine, Quentel, Claire, Le Floch, Stéphane
• Other Authors: Optimisation des régulations physiologiques (ORPHY (EA 4324)), Université de Brest (UBO)-Centre Hospitalier Régional Universitaire de Brest (CHRU Brest)-Institut Brestois Santé Agro Matière (IBSAM), Université de Brest (UBO)-Université de Brest (UBO), Institut National de l'Environnement Industriel et des Risques (INERIS), Unité de Recherche Interactions Animal-Environnement - EA 4689 (IAE), Université de Reims Champagne-Ardenne (URCA), Laboratoire de Ploufragan-Plouzané-Niort ANSES, Agence nationale de sécurité sanitaire de l'alimentation, de l'environnement et du travail (ANSES), Laboratoire de Ploufragan - Plouzané
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2014
• Subjects: Chemical dispersant; Physiology; Immunology; Oxidative stress; Scophthalmus maximus; [SDV]Life Sciences [q-bio]; Turbot
• Online Access: https://hal.univ-brest.fr/hal-04351044; https://hal.univ-brest.fr/hal-04351044/document; https://hal.univ-brest.fr/hal-04351044/file/Theron%20et%20al%202014.pdf; https://doi.org/10.1007/s11270-014-1887-z

International audience This work focuses on the effects of two commercial formulations of dispersants on juvenile turbot after 48 h of contamination and 15 days of recovery. Oxidative stress, gill, and immune functions were assessed in seven conditions: exposition to the watersoluble fraction of an oil, mechanical dispersion, two dispersants alone, two types of chemical dispersion and a control group. In the contaminated groups, nominal concentrations of oil and dispersants were 66 and 3.3 mg L-1 , respectively. Dispersants alone had weak effects; the soluble fraction induced leucopenia and gill alteration. Chemical and mechanical dispersion induced similar effects. After contamination, a principal component analysis showed two distinct areas: the first one included the control and dispersants groups, the second one dispersion of the oil. After the 15-day recovery period, it was not possible to differentiate the groups. This study shows that, in the experimental conditions tested, the dispersion, either chemical or mechanical, enhances the consequences of exposure to crude oil without long-lasting consequences.