%0 Journal Article %J Aquatic Toxicology %D 2022 %T Effects of chronic exposure of metals released from the dissolution of an aluminium galvanic anode on the Pacific oyster Crassostrea gigas %A Alexandre Levallois %A Christelle Caplat %A Olivier Basuyaux %A Jean-Marc Lebel %A Antoine Laisney %A Katherine Costil %A Antoine Serpentini %K aluminium %K Bioaccumulation %K Biological effects %K Crassostrea gigas %K galvanic anode %K Oyster %X Among the anthropogenic sources releasing metallic species into the marine environment, the galvanic anode cathodic protection system (GACP) is widely used to protect submerged metallic structures from corrosion. Galvanic anodes are an alloy of metals of which the main component is aluminum or zinc. Very few studies were performed to study their potential biological effects. We investigated the chronic toxicity of an aluminum-based galvanic anode on the Pacific oyster, Crassostrea gigas. Oysters were exposed for 84 days to three concentrations of aluminum (50, 100 and 300 µg L−1) obtained with an electrochemical experimental device simulating the dissolution of a galvanic anode. At different exposure times, we studied a battery of biomarkers of the immune system, reproductive parameters and the metabolic state of the oysters. Results demonstrated a sensitivity of oysters at the highest concentration and some biological effects were observed especially for the malondialdehyde content in the digestive gland after 84 days of exposure. In addition to these biomarkers, the bioaccumulation of the different metals composing the anode was measured in oysters’ tissues. Bivalves bioaccumulated more zinc than aluminum, even if aluminium was present in greater concentrations during exposures. Moreover, exposure time did not influence the bioaccumulation of aluminum in contrast to zinc. %B Aquatic Toxicology %V Volume 249 %G eng %R https://doi.org/10.1016/j.aquatox.2022.106223 %0 Journal Article %J Marine Pollution Bulletin %D 2020 %T Realistic environmental exposure to microplastics does not induce biological effects in the Pacific oyster Crassostrea gigas %A Revel, Messika %A Châtel, Amélie %A Perrein-Ettajani, Hanane %A Bruneau, Mélanie %A Akcha, Farida %A Sussarellu, Rossana %A Rouxel, Julien %A Katherine Costil %A Decottignies, Priscilla %A Cognie, Bruno %A Lagarde, Fabienne %A Mouneyrac, Catherine %K biodeposits %K biomarkers %K bivalves %K Crassostrea gigas %K microplastics %X The aim of the present study was to evaluate the presence and potential toxic effects of plastic fragments(< 400μm) of polyethylene and polypropylene on the Pacific oysterCrassostrea gigas.Oysters were exposed toenvironmentally relevant concentrations (0, 0.008, 10, 100μg of particles/L) during 10 days, followed by adepuration period of 10 days in clean seawater. Effects of microplastics were evaluated on the clearance rate oforganisms, tissue alteration, antioxidant defense, immune alteration and DNA damage. Detection and quanti-fication of microplastics in oyster's tissues (digestive gland, gills and other tissues) and biodeposits using infraredmicroscopy were also conducted. Microplastics were detected in oyster's biodeposits following exposure to alltested concentrations: 0.003, 0.006 and 0.05 particles/mg of biodeposits in oysters exposed to 0.008, 10 and100μg of particles/L, respectively. No significant modulation of biological markers was measured in organismsexposed to microplastics in environmentally relevant conditions. %B Marine Pollution Bulletin %V 150 %P 110627 %8 Jan-01-2020 %G eng %U https://linkinghub.elsevier.com/retrieve/pii/S0025326X19307751 %! Marine Pollution Bulletin %R 10.1016/j.marpolbul.2019.110627 %0 Journal Article %J Aquaculture %D 2020 %T Sex determination in the oyster Crassostrea gigas - A large longitudinal study of population sex ratios and individual sex changes %A Broquard, Coralie %A Anne-Sophie Martinez %A Maurouard, Elise %A Lamy, Jean-Baptiste %A Degremont, Lionel %K Crassostrea gigas %K Hermaphroditism %K Oysters %K Sex change %K sex-ratio %B Aquaculture %V 515 %P 734555 %G eng %U https://hal.archives-ouvertes.fr/hal-02559678 %R 10.1016/j.aquaculture.2019.734555 %0 Journal Article %J Marine Pollution Bulletin %D 2017 %T Sub-lethal effects of a glyphosate-based commercial formulation and adjuvants on juvenile oysters (Crassostrea gigas) exposed for 35 days %A Séguin, Alexis %A Mottier, Antoine %A Perron, Carole %A Lebel, Jean-Marc %A Antoine Serpentini %A Katherine Costil %K Crassostrea gigas %K individual biomarkers %K mortality %K oxidative stress %K POEAs %K Roundup %B Marine Pollution Bulletin %G eng %0 Journal Article %J Comparative Biochemistry and Physiology - Part A: Molecular and Integrative Physiology %D 2009 %T Identification and expression of a factor of the DM family in the oyster Crassostrea gigas %A Naimi, Amine %A Anne-Sophie Martinez %A Specq, Marie-Laure %A Mrac, Abdellah %A Diss, Blandine %A Mathieu, Michel %A Sourdaine, Pascal %K Crassostrea gigas %K Dmrt1 %K Dmrt4 %K Dmrt5 %K Oyster %K Sex determination %B Comparative Biochemistry and Physiology - Part A: Molecular and Integrative Physiology %V 152 %P 189-196 %G eng %U https://hal-normandie-univ.archives-ouvertes.fr/hal-02296545 %R 10.1016/j.cbpa.2008.09.019 %0 Journal Article %J Comparative Biochemistry and Physiology - Part B: Biochemistry and Molecular Biology %D 2009 %T Molecular cloning and gene expression of Cg-Foxl2 during the development and the adult gametogenetic cycle in the oyster Crassostrea gigas %A Naimi, Amine %A Anne-Sophie Martinez %A Specq, Marie-Laure %A Diss, Blandine %A Mathieu, Michel %A Sourdaine, Pascal %K Adult gametogenetic cycle %K Cg-DMl %K Crassostrea gigas %K Development %K Foxl2 %K Gonad %K Oyster %K Sex determination %B Comparative Biochemistry and Physiology - Part B: Biochemistry and Molecular Biology %V 154 %P 134-142 %G eng %U https://hal-normandie-univ.archives-ouvertes.fr/hal-02296548 %R 10.1016/j.cbpb.2009.05.011