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dc.rights.licenseopenen_US
dc.contributor.authorAKCHA, F.
dc.contributor.authorCOQUILLÉ, Nathalie
dc.contributor.authorSUSSARELLU, R.
dc.contributor.authorROUXEL, J.
dc.contributor.authorCHOUVELON, T.
dc.contributor.authorGONZALEZ, Patrice
dc.contributor.authorLEGEAY, Alexia
dc.contributor.authorBRUZAC, S.
dc.contributor.authorSIREAU, T.
dc.contributor.authorGONZALEZ, J.-L.
dc.contributor.authorGOURVES, Pierre-Yves
dc.contributor.authorGODFRIN, Y.
dc.contributor.authorBUCHET, V.
dc.contributor.authorSTACHOWSKI-HABERKORN, S.
dc.date.accessioned2022-11-17T10:45:37Z
dc.date.available2022-11-17T10:45:37Z
dc.date.issued2022-06-10
dc.identifier.issn0048-9697en_US
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/170305
dc.description.abstractEnDue to new usages and sources, copper (Cu) concentrations are increasing in the Arcachon Basin, an important shellfish production area in France. In the present paper, the trophic transfer of Cu was studied between a microalga, Tetraselmis suecica, and Crassostrea gigas (Pacific oyster) spat. An experimental approach was developed to assess Cu exposure, transfer and toxicity on both phytoplankton and spat. Exposure of microalgal cultures to Cu for 7–8 days (3.1 ± 0.1, 15.7 ± 0.2 and 50.4 ± 1.0 μg Cu·L−1 for the control, Cu15 and Cu50 conditions, respectively) led to concentrations in microalgae (28.3 ± 0.9 and 110.7 ± 11.9 mg Cu·kg dry weight−1 for Cu15 and Cu50, respectively) close to those measured in the field. Despite Cu accumulation, the physiology of the microalgae remained poorly affected. Exposed cultures could only be discriminated from controls by a higher relative content in intracellular reactive oxygen species, and a lower relative content in lipids together with a reduced metabolic activity. By contrast, the fatty acid profile of microalgae was modified, with a particularly relevant lower content of the essential polyunsaturated fatty acid 22:6n-3 (docosahexaenoic acid [DHA]). Following 21 days of spat feeding with Cu15 and Cu50 microalgal cultures, trophic transfer of Cu was observed with a high initial Cu concentration in spat tissues. No effect was observed on oxidative stress endpoints. Cu exposure was responsible for a decrease in the spat condition index, an outcome that could be related to an insufficient DHA supply and extra energy demand as suggested by the overexpression of genes involved in energy metabolism, ATP synthesis and glycogen catabolism. © 2022
dc.language.isoENen_US
dc.subject.enCu
dc.subject.enTetraselmis suecica
dc.subject.enOyster
dc.subject.enTrophic exposure
dc.subject.enToxicity
dc.subject.enLipid composition
dc.title.enTrophic transfer of copper decreases the condition index in Crassostrea gigas spat in concomitance with a change in the microalgal fatty acid profile and enhanced oyster energy demand
dc.typeArticle de revueen_US
dc.identifier.doi10.1016/j.scitotenv.2022.153841en_US
dc.subject.halSciences de l'environnementen_US
bordeaux.journalScience of the Total Environmenten_US
bordeaux.volume824en_US
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
hal.identifierhal-03857459
hal.version1
hal.date.transferred2022-11-17T10:45:40Z
hal.exporttrue
dc.rights.ccPas de Licence CCen_US
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