title: Combined effects of pollutants and salinity on embryo-larval development of the Pacific oyster, Crassostrea gigas.
abstract: For several years, low larval recruitment has been observed in Arcachon Bay, in southwest France. Exposure to pollutants could partly account for the reduction of early life stages of the Pacific oyster. This study evaluated the effects of copper and S-metolachlor in combination with salinity on the early life stages of Crassostrea gigas. Embryos were exposed to concentrations of copper (1, 10 and 50 μg L(-1)) or S-metolachlor (10, 100 and 1000 ng L(-1)) and six salinities (18, 21, 24, 27, 30 and 33 u.s.i). Embryotoxicity was measured by considering both the percentage of abnormalities and arrested development in D-shaped larvae. Embryo-larval development was only affected at salinities ≤24 u.s.i, which have never been observed during C. gigas reproduction period in Arcachon Bay. Both contaminants had an effect at environmental concentrations. Our results suggest that copper and metolachlor toxicity was enhanced with decreasing salinity.
authors.affiliation: Univ. Bordeaux, EPOC, UMR 5805, F-33400 Talence, France.
authors.forename: Perrine
authors.initials: P
authors.lastname: Gamain
authors.affiliation: Univ. Bordeaux, EPOC, UMR 5805, F-33400 Talence, France.
authors.forename: Patrice
authors.initials: P
authors.lastname: Gonzalez
authors.affiliation: Univ. Bordeaux, EPOC, UMR 5805, F-33400 Talence, France.
authors.forename: Jérôme
authors.initials: J
authors.lastname: Cachot
authors.affiliation: Univ. Bordeaux, EPOC, UMR 5805, F-33400 Talence, France.
authors.forename: Patrick
authors.initials: P
authors.lastname: Pardon
authors.affiliation: Univ. Bordeaux, EPOC, UMR 5805, F-33400 Talence, France.
authors.forename: Nathalie
authors.initials: N
authors.lastname: Tapie
authors.affiliation: Univ. Bordeaux, EPOC, UMR 5805, F-33400 Talence, France.
authors.forename: Pierre Yves
authors.initials: PY
authors.lastname: Gourves
authors.affiliation: Univ. Bordeaux, EPOC, UMR 5805, F-33400 Talence, France.
authors.forename: Hélène
authors.initials: H
authors.lastname: Budzinski
authors.affiliation: Univ. Bordeaux, EPOC, UMR 5805, F-33400 Talence, France.
authors.forename: Bénédicte
authors.initials: B
authors.lastname: Morin
mesh_terms: D000081:Acetamides / Q000008:administration & dosage / Q000737:chemistry / Q000633:toxicity*; D000818:Animals; D003300:Copper / Q000008:administration & dosage / Q000737:chemistry / Q000633:toxicity*; D049896:Crassostrea / Q000187:drug effects* / Q000254:growth & development*; D006540:Herbicides / Q000008:administration & dosage / Q000737:chemistry / Q000633:toxicity; D007814:Larva / Q000187:drug effects / Q000254:growth & development; D054712:Salinity; D014131:Trace Elements / Q000008:administration & dosage / Q000737:chemistry / Q000633:toxicity; D014874:Water Pollutants, Chemical / Q000633:toxicity*
chemical_list: D000081:Acetamides; D006540:Herbicides; D014131:Trace Elements; D014874:Water Pollutants, Chemical; D003300:Copper; C051786:metolachlor
keywords: Copper; Embryotoxicity bioassay; Metolachlor; Multiple stresses; Pacific oyster; Salinity