title: Persistent organic pollutants in a marine bivalve on the Marennes-Oléron Bay and the Gironde Estuary (French Atlantic Coast) - part 1: bioaccumulation.
abstract: The aim of this study was to determine 1) the relevance of using the Pacific oyster Crassostrea gigas as a sentinel organism, at a juvenile stage, for polycyclic aromatic hydrocarbon (PAH) and persistent organic pollutant (polychlorobiphenyl, PCB, polybromodimethylether, PBDE, and organochlorine pesticide, OCP) contamination, 2) the potential levels of chemical organic contamination in the Marennes-Oléron Bay, and their potential sources and 3) the potential influence of physiological or environmental factors on contaminant body burdens in oysters. To this end, juvenile oysters purchased from an oyster hatchery were transplanted to a reference site, in Bouin, and to different transplantation sites in the Marennes-Oléron Bay, the first oyster production area in France, and in the Gironde Estuary, the biggest estuary in Occidental Europe. Transplantations were done during summer and winter. Whole oyster soft tissues from each site were analysed for PAHs, PCBs, PBDEs and OCPs. Results obtained with a transplantation period of 3months suggest that C. gigas, at the juvenile stage, is a relevant sentinel organism for short-term assessment of contamination for these contaminants. In addition, no significant effects of physiological factors on contaminant body burdens were observed. Principal component analysis revealed two distinct groups of contaminants (PAHs and OPCs, and PCBs and PBDEs) and three groups of sites: 1) the reference site, 2) Les Palles (LP) and Boyard (BOY) in winter and 3) all the other sites. The group of LP and BOY was clearly defined by the levels of PAHs and OCPs, suggesting higher levels of contamination of these chemical compounds on these sites, potentially due to local contamination sources. In addition, no relevant effects of physiological or environmental factors on contaminant body burdens were observed. Results suggest also a predominance of contaminants related to agricultural activities along the Marennes-Oléron Bay, and therefore, further studies on the presence of pesticides in this region should be considered.
authors.affiliation: Littoral Environnement et Sociétés (LIENSs), UMR 7266 CNRS-Université de La Rochelle, 2 rue Olympe de Gouges, F-17042 La Rochelle Cedex 01, France. Electronic address: aluna1508@yahoo.com.
authors.forename: A
authors.initials: A
authors.lastname: Luna-Acosta
authors.affiliation: Université Bordeaux 1, Laboratoire de Physico-ToxicoChimie de l'environnement (LPTC), UMR EPOC (UMR5805 CNRS-Université de Bordeaux 1), 351 Cours de la Libération, 33405 Talence, France; CNRS, Laboratoire de Physico-ToxicoChimie de l'environnement (LPTC), EPOC (UMR 5805, CNRS-Université de Bordeaux 1), 351 Cours de la Libération, 33405 Talence, France.
authors.forename: H
authors.initials: H
authors.lastname: Budzinski
authors.affiliation: Université Bordeaux 1, Laboratoire de Physico-ToxicoChimie de l'environnement (LPTC), UMR EPOC (UMR5805 CNRS-Université de Bordeaux 1), 351 Cours de la Libération, 33405 Talence, France; CNRS, Laboratoire de Physico-ToxicoChimie de l'environnement (LPTC), EPOC (UMR 5805, CNRS-Université de Bordeaux 1), 351 Cours de la Libération, 33405 Talence, France.
authors.forename: K
authors.initials: K
authors.lastname: Le Menach
authors.affiliation: Littoral Environnement et Sociétés (LIENSs), UMR 7266 CNRS-Université de La Rochelle, 2 rue Olympe de Gouges, F-17042 La Rochelle Cedex 01, France.
authors.forename: H
authors.initials: H
authors.lastname: Thomas-Guyon
authors.affiliation: Littoral Environnement et Sociétés (LIENSs), UMR 7266 CNRS-Université de La Rochelle, 2 rue Olympe de Gouges, F-17042 La Rochelle Cedex 01, France.
authors.forename: P
authors.initials: P
authors.lastname: Bustamante
mesh_terms: D000818:Animals; D061006:Bays / Q000737:chemistry; D049896:Crassostrea / Q000378:metabolism*; D004784:Environmental Monitoring; D063366:Estuaries; D005602:France; D006843:Hydrocarbons, Chlorinated / Q000378:metabolism; D010575:Pesticides / Q000378:metabolism; D011078:Polychlorinated Biphenyls / Q000378:metabolism; D011084:Polycyclic Aromatic Hydrocarbons / Q000378:metabolism; D012623:Seawater; D014874:Water Pollutants, Chemical / Q000378:metabolism*
chemical_list: D006843:Hydrocarbons, Chlorinated; D010575:Pesticides; D011084:Polycyclic Aromatic Hydrocarbons; D014874:Water Pollutants, Chemical; D011078:Polychlorinated Biphenyls
keywords: Active biomonitoring; Bioaccumulation; Bivalve; Persistent organic pollutants; Polycyclic aromatic hydrocarbons