title: Sub-lethal effects of a glyphosate-based commercial formulation and adjuvants on juvenile oysters (Crassostrea gigas) exposed for 35days.
abstract: Glyphosate-based herbicides include active matter and adjuvants (e.g. polyethoxylated tallow amines, POEAs). In addition to a previous investigation on the effect of glyphosate on oysters, the aim of the present study was to investigate the effects of sub-chronic exposures (35days) to three concentrations (0.1, 1 and 100μgL-1) of Roundup Express® (REX) and POEAs on oysters belonging to the same age group. Low mortality rates were calculated, and only few significant differences (i.e. shell length) between exposure conditions were observed at a given date. However, when comparing the biomarker's temporal variations, some different patterns (e.g. condition index, reproduction, parameters of oxidative stress) were observed depending on the molecules and concentrations. These results suggest that a longer exposure to an environmental concentration (0.1μgL-1) of REXand POEAs could induce harmful effects on oysters.
authors.affiliation: Normandie Université, F-14032 Caen, France; UMR BOREA (Biologie des Organismes et Ecosystèmes Aquatiques); MNHN, UPMC, UCN, CNRS-7208, IRD-207; IBFA; Université de Caen Normandie, Esplanade de la Paix, CS 14032;14032 Caen Cedex 5, France.
authors.forename: Alexis
authors.initials: A
authors.lastname: Séguin
authors.affiliation: Normandie Université, F-14032 Caen, France; UMR BOREA (Biologie des Organismes et Ecosystèmes Aquatiques); MNHN, UPMC, UCN, CNRS-7208, IRD-207; IBFA; Université de Caen Normandie, Esplanade de la Paix, CS 14032;14032 Caen Cedex 5, France.
authors.forename: Antoine
authors.initials: A
authors.lastname: Mottier
authors.affiliation: Normandie Université, F-14032 Caen, France; UMR BOREA (Biologie des Organismes et Ecosystèmes Aquatiques); MNHN, UPMC, UCN, CNRS-7208, IRD-207; IBFA; Université de Caen Normandie, Esplanade de la Paix, CS 14032;14032 Caen Cedex 5, France.
authors.forename: Carole
authors.initials: C
authors.lastname: Perron
authors.affiliation: Normandie Université, F-14032 Caen, France; UMR BOREA (Biologie des Organismes et Ecosystèmes Aquatiques); MNHN, UPMC, UCN, CNRS-7208, IRD-207; IBFA; Université de Caen Normandie, Esplanade de la Paix, CS 14032;14032 Caen Cedex 5, France.
authors.forename: Jean Marc
authors.initials: JM
authors.lastname: Lebel
authors.affiliation: Normandie Université, F-14032 Caen, France; UMR BOREA (Biologie des Organismes et Ecosystèmes Aquatiques); MNHN, UPMC, UCN, CNRS-7208, IRD-207; IBFA; Université de Caen Normandie, Esplanade de la Paix, CS 14032;14032 Caen Cedex 5, France.
authors.forename: Antoine
authors.initials: A
authors.lastname: Serpentini
authors.affiliation: Normandie Université, F-14032 Caen, France; UMR BOREA (Biologie des Organismes et Ecosystèmes Aquatiques); MNHN, UPMC, UCN, CNRS-7208, IRD-207; IBFA; Université de Caen Normandie, Esplanade de la Paix, CS 14032;14032 Caen Cedex 5, France. Electronic address: katherine.costil@unicaen.fr.
authors.forename: Katherine
authors.initials: K
authors.lastname: Costil
mesh_terms: D000818:Animals; D049896:Crassostrea / Q000187:drug effects*; D005998:Glycine / Q000031:analogs & derivatives* / Q000633:toxicity; D006540:Herbicides / Q000633:toxicity*; D018384:Oxidative Stress / Q000187:drug effects; D012098:Reproduction / Q000187:drug effects; D018675:Toxicity Tests; D000097797:Glyphosate
chemical_list: D005998:Glycine; D006540:Herbicides; D000097797:Glyphosate
keywords: Crassostrea gigas; Individual biomarkers; Mortality; Oxidative stress; POEAs; Roundup®