seanoe:41888 data@seanoe.org 2025-10-20 ISO 19115:2003/19139 1.0 VELYGER Database: The Oyster Larvae Monitoring French Project 2024-05 2025-10-20 Pouvreau Stephane, Lagarde Franck, Violette Herve, Le Grand Jacqueline, Huber Matthias, Maurer Daniele, Auby Isabelle, Cochet Helene, Allain Gwenhael, Bouquet Anne-Lise, Bechade Marion, Marmion Lea, Mille Dominique, Barbier Pierrick (2024). VELYGER Database: The Oyster Larvae Monitoring French Project. SEANOE. https://doi.org/10.17882/41888 Worldwide, shellfish aquaculture and fisheries in coastal ecosystems represent crucial activities for human feeding. But these biological productions are under the pressure of climate variability and global change. Anticipating the biological processes affected by climate hazards remains a vital objective for species conservation strategies and human activities that rely on. Within marine species, filter feeders like oysters are real key species in coastal ecosystems due to their economic and societal value (fishing and aquaculture) but also due to their ecological importance. Indeed oysters populations in good health play the role of ecosystem engineers that can give many ecosystem services at several scales: building reef habitats that contribute to biodiversity, benthic-pelagic coupling and phytoplankton bloom control through water filtration, living shorelines against coastal erosion… The Pacific oyster, Crassostrea gigas (Thunberg, 1793), which is currently widespread worldwide, was introduced into the Atlantic European coasts at the end of the 19th century for shellfish culture purposes and becomes the main marine species farmed in France (around 100 000 tons) despite severe mortalities crisis. But in the same time and because of warming, natural oysters beds has spread significantly along the French coast and are supposed to have reach approximately 500 000 tons. In that context, Pacific oyster populations (natural and cultivated) in France are the subjects of many scientific projects. Among them, a specific long-term biological monitoring focuses on the reproduction of these populations at a national scale: the VELYGER national program. With more than 8 years of weekly data at many stations in France, this field-monitoring program offers a valuable dataset for studying processes underpinning reproduction cycle of this key-species in relation to environmental parameters, water quality and climate change.   Database content: Larval concentration (number of individuals per 1.5 m3) monitored, since 2008, at several stations in six bays of the French coast (from south to north): Thau Lagoon and bays of Arcachon, Marennes Oléron, Bourgneuf, Vilaine and Brest (see map below).   Methods used to monitor larval concentration: An important volume of seawater (1.5 m3) is pumped twice a week throughout the spawning season (june-september), at one meter below the surface at high tide (+/- 2h) in several sites within each VELYGER ecosystem. Water is filtered trough plankton net fitted with 40 µm mesh. After a proper rinsing of the net, the retained material is transferred into a polyethylene bottle (1 liter) and fixed with alcohol. At laboratory, sample is then gently filtered and rinse again and transferred into eprouvette. Two sub-samples of 1 mL are then taken using a pipette and examined on a graticule slide for microscope. The microscopic examination is made with a conventional binocular optical microscope with micrometer stage at a magnification of 10 X (or above). During the counting, a special care is necessary as larvae of other bivalves are also collected and confusion is possible. Larvae of C. gigas are also classified into four stage of development: - Stage I = D-shaped straight hinge larvae (shell length <105 µm) - Stage II = Early umbo evolved larvae (shell length between 105 and 150 µm) - Stage III = Medium umbo larvae (shell length between 150 and 235 µm) - Stage IV*= Large umbo eyed pediveliger larvae (shell length > 235 µm) * Larvae that are very closed to settle are sometimes identified into a separated 5th stage, but generally this stage is included in stage IV.   Illustrations: Location of the different Velyger sites along the French coast. From south to north: Thau Lagoon and bays of Arcachon, Marennes Oléron, Bourgneuf, Vilaine and Brest.   Legend: Pacific Oyster Larvae (left side) and Natural oyster bed (right side). Photos : © S. Pouvreau/Ifremer POUVREAU Stephane UMR 6539 LEMAR, Ifremer, 11 presqu’ile du vivier, 29840 Argenton-en-Landunvez, France LAGARDE Franck LEROC, Station de Sète, Avenue Jean Monnet, CS 30171, 34203 Sète Cedex, France VIOLETTE Herve LEROC, Station de Sète, Avenue Jean Monnet, CS 30171, 34203 Sète Cedex, France LE GRAND Jacqueline UMR 6539 LEMAR, Ifremer, 11 presqu’ile du vivier, 29840 Argenton-en-Landunvez, France HUBER Matthias UMR 6539 LEMAR, Ifremer, 11 presqu’ile du vivier, 29840 Argenton-en-Landunvez, France MAURER Daniele LERAR, Station d'Arcachon , Quai du Cdt Silhouette, 33120 Arcachon, France AUBY Isabelle LERAR, Station d'Arcachon , Quai du Cdt Silhouette, 33120 Arcachon, France Cochet Helene COCHET Environnement, Le Coedo, 56550 Locoal Mendon, France Allain Gwenhael ARMERIA, 52 rue Emile Corre, 56100 Lorient, France Bouquet Anne-Lise CAPENA, Prise de Terdoux, 17480 Le Château d’Oléron, France Bechade Marion CAPENA, Prise de Terdoux, 17480 Le Château d’Oléron, France Marmion Lea CAPENA, Prise de Terdoux, 17480 Le Château d’Oléron, France Mille Dominique CAPENA, Prise de Terdoux, 17480 Le Château d’Oléron, France Barbier Pierrick CAPENA, Prise de Terdoux, 17480 Le Château d’Oléron, France SEANOE https://www.seanoe.org/data/00308/41888/illustration.gif Pacific Oyster Larvae Biological oceanography Invertebrates ODATIS aggregation parameters and Essential Variable names 2025-07-29 geonetwork.thesaurus.external.theme.NVS.OD1 Biological oceanography SeaDataNet Parameter Disciplines 2025-07-29 geonetwork.thesaurus.external.parameter.NVS.P08 /Observational data/in-situ Type de jeux de donnée ODATIS 2024-10-15 geonetwork.thesaurus.local.theme.type_jeux_donnee CC-BY-NC-ND (Creative Commons - Attribution, No commercial usage, No modification) Failure of bivalve foundation species recruitment related to trophic changes during an extreme heatwave event 2022 Inter-Research Science Center Correia-Martins A Tremblay R Bec Beatrice Roques C Atteia Ariane Gobet Angélique Richard Marion Hamaguchi M Miyajima T Hori M Miron G Pouvreau Stephane Lagarde Franck 10.3354/meps14060 A 26-year time series of mortality and growth of the Pacific oyster C. gigas recorded along French coasts 2022 Springer Science and Business Media LLC MAZALEYRAT ANNA NORMAND JULIEN DUBROCA LAURENT FLEURY ELODIE 10.1038/s41597-022-01511-2 Invasive non-native species management under climatic and anthropogenic pressure: application of a modelling framework 2022 Regional Euro-Asian Biological Invasions Centre Oy (REABIC) Teixeira Alves Mickael Tidbury Hannah 10.3391/mbi.2022.13.2.01 The toxic dinoflagellate Alexandrium minutum affects oyster gamete health and fertilization potential 2021 Elsevier BV CASTREC JUSTINE FABIOUX CAROLINE LE GOÏC NELLY BOULAIS MYRINA SOUDANT PHILIPPE HÉGARET HELENE 10.1016/j.marenvres.2021.105401 Rapport Alex Breizh. Impact des contrôles environnementaux sur la dynamique des efflorescences de l’algue toxique Alexandrium minutum en Rade de Brest. Modélisation en compétition interspécifique. 2021 Ifremer Chapelle Annie Sourisseau Marc Plus Martin 10.13155/81393 Genetic pathways underpinning hormonal stress responses in fish exposed to short- and long-term warm ocean temperatures 2021 Elsevier BV GOIKOETXEA ALEXANDER SADOUL BASTIEN BLONDEAU BIDET EVA AERTS JOHAN BLANC MARIE-ODILE PARRINELLO HUGUES BARRACHINA CÉLIA PRATLONG MARINE GEFFROY BENJAMIN 10.1016/j.ecolind.2020.106937 Realised niche and suitability index highlight spatial and temporal distribution of toxic phytoplankton species 2021 Inter-research Guallar Carles Chapelle Annie Bacher Cedric 10.3354/meps13597 Understanding drivers of wild oyster population persistence 2021 Springer Science and Business Media LLC Teixeira Alves Mickael Taylor Nick G. H. Tidbury Hannah J. 10.1038/s41598-021-87418-1 The toxic dinoflagellate Alexandrium minutum impairs the performance of oyster embryos and larvae 2020 Elsevier BV CASTREC JUSTINE HÉGARET HELENE HUBER MATTHIAS LE GRAND JACQUELINE HUVET ARNAUD TALLEC KEVIN BOULAIS MYRINA SOUDANT PHILIPPE FABIOUX CAROLINE 10.1016/j.hal.2020.101744 Observatoire national du cycle de vie de l’huître creuse en France. Rapport annuel ECOSCOPA 2019 2020 Ifremer Fleury Elodie Petton Sebastien Corporeau Charlotte Benabdelmouna Abdellah Pouvreau Stephane 10.13155/79902 Cultures of Dinophysis sacculus, D. acuminata and pectenotoxin 2 affect gametes and fertilization success of the Pacific oyster, Crassostrea gigas 2020 Elsevier BV GAILLARD SYLVAIN LE GOÏC NELLY MALO FLORENT BOULAIS MYRINA FABIOUX CAROLINE ZACCAGNINI LUCAS CARPENTIER LILIANE SIBAT MANOELLA RÉVEILLON DAMIEN SÉCHET VERONIQUE HESS PHILIPP HÉGARET HELENE 10.1016/j.envpol.2020.114840 Harmful algae niche responses to environmental and community variation along the French coast 2020 Elsevier BV Karasiewicz Stephane Chapelle Annie Bacher Cedric Soudant Dominique 10.1016/j.hal.2020.101785 Harmful algae niche responses to environmental and community variation along the French coast 2020 Elsevier BV Karasiewicz Stéphane Chapelle Annie Bacher Cédric Soudant Dominique 10.1016/j.hal.2020.101785 Observatoire national du cycle de vie de l’huître creuse en France. Rapport annuel ECOSCOPA 2018 2019 Ifremer Fleury Elodie Petton Sebastien Corporeau Charlotte Gangnery Aline Pouvreau Stephane 10.13155/74654 Modeling reproductive traits of an invasive bivalve species under contrasting climate scenarios from 1960 to 2100 2019 Elsevier Science Bv Gourault Melaine Petton Sebastien Thomas Yoann Pecquerie Laure Marques Goncalo M. Cassou Christophe Fleury Elodie Paulet Yves-Marie Pouvreau Stephane 10.1016/j.seares.2018.05.005 Duality of trophic supply and hydrodynamic connectivity drives spatial patterns of Pacific oyster recruitment 2019 Inter-Research Science Center LAGARDE FRANCK FIANDRINO ANNIE UBERTINI MARTIN ROQUE D'ORBCASTEL EMMANUELLE MORTREUX SERGE CHIANTELLA CLAUDE BEC BEATRICE BONNET DELPHINE ROQUES CÉCILE BERNARD ISMAEL RICHARD MARION GUYONDET THOMAS POUVREAU STEPHANE LETT CHRISTOPHE 10.3354/meps13151 Detailed insights into pan-European population structure and inbreeding in wild and hatchery Pacific oysters (Crassostrea gigas) revealed by genome-wide SNP data 2019 Wiley Vendrami David L. J. Houston Ross D. Gharbi Karim Telesca Luca Gutierrez Alejandro P. Gurney-Smith Helen Hasegawa Natsuki Boudry Pierre Hoffman Joseph I. 10.1111/eva.12736 Carbon and nitrogen elemental and isotopic ratios of filter-feeding bivalves along the French coasts: An assessment of specific, geographic, seasonal and multi-decadal variations 2018 Elsevier Science Bv BRIANT NICOLAS SAVOYE NICOLAS CHOUVELON TIPHAINE DAVID VALERIE RODRIGUEZ SAMUEL CHARLIER KARINE SONKE JEROEN E. CHIFFOLEAU JEAN-FRANCOIS BRACH-PAPA CHRISTOPHE KNOERY JOEL 10.1016/j.scitotenv.2017.08.281 The dinoflagellate Alexandrium minutum affects development of the oyster Crassostrea gigas, through parental or direct exposure 2018 Elsevier BV CASTREC JUSTINE HÉGARET HELENE ALUNNO-BRUSCIA MARIANNE PICARD MAÏLYS SOUDANT PHILIPPE PETTON BRUNO BOULAIS MYRINA SUQUET MARC QUÉAU ISABELLE RATISKOL DOMINIQUE FOULON VALENTIN LE GOÏC NELLY FABIOUX CAROLINE 10.1016/j.envpol.2018.11.084 Trophic environments influence size at metamorphosis and recruitment performance of Pacific oysters 2018 Inter-Research Science Center Lagarde F Richard M Bec B Roques C Mortreux S Bernard I Chiantella C Messiaen G Nadalini JB Hori M Hamaguchi M Pouvreau S Roque d’Orbcastel E Tremblay R 10.3354/meps12666 Trophic environments influence size at metamorphosis and recruitment performance of Pacific oysters 2018 Inter-research Lagarde Franck Richard Marion Bec Beatrice Roques Cecile Mortreux Serge Bernard Ismael Chiantella Claude Messiaen Gregory Nadalini Jean-Bruno Hori Masakazu Hamaguchi Masami Pouvreau Stephane Roque D'Orbcastel Emmanuelle Tremblay Rejean 10.3354/meps12666 Biological characteristics of sperm in European flat oyster ( Ostrea edulis ) 2018 Edp Sciences S A SUQUET MARC POUVREAU STEPHANE QUEAU ISABELLE BOULAIS MYRINA LE GRAND JACQUELINE RATISKOL DOMINIQUE COSSON JACKY 10.1051/alr/2018008 Detailed insights into pan-European population structure and inbreeding in wild and hatchery Pacific oyster ( Crassostrea gigas ) populations revealed by genome-wide SNP data 2018 Wiley Vendrami David L. J. Houston Ross D. Gharbi Karim Telesca Luca Gutierrez Alejandro P. Gurney-Smith Helen Hasegawa Natsuki Boudry Pierre Hoffman Joseph I. 10.1111/eva.12736 Global and local factors driving the phenology of Alexandrium minutum (Halim) blooms and its toxicity 2017 Elsevier Science Bv Guallar Carles Bacher Cedric Chapelle Annie 10.1016/j.hal.2017.05.005 Recruitment of the Pacific oyster Crassostrea gigas in a shellfish-exploited Mediterranean lagoon: discovery, driving factors and a favorable environmental window 2017 Inter-Research Science Center Lagarde F Roque d’orbcastel E Ubertini M Mortreux S Bernard I Fiandrino A Chiantella C Bec B Roques C Bonnet D Miron G Richard M Pouvreau S Lett C 10.3354/meps12265 Recruitment of the Pacific oyster Crassostrea gigas in a shellfish-exploited Mediterranean lagoon: discovery, driving factors and a favorable environmental window 2017 Inter-research Lagarde Franck Roque D'Orbcastel Emmanuelle Ubertini Martin Mortreux Serge Bernard Ismael Fiandrino Annie Chiantella Claude Bec Beatrice Roques Cecile Bonnet Delphine Miron Gilles Richard Marion Pouvreau Stephane Lett Christophe 10.3354/meps12265 Resource Competition Affects Plankton Community Structure; Evidence from Trait-Based Modeling 2017 Frontiers Media SA SOURISSEAU MARC LE GUENNEC VALERIE LE GLAND GUILLAUME PLUS MARTIN CHAPELLE ANNIE 10.3389/fmars.2017.00052 Gametogenesis, spawning behavior and larval abundance of the Pacific oyster Crassostrea gigas in the Thau lagoon: Evidence of an environment-dependent strategy 2017 Elsevier BV UBERTINI MARTIN LAGARDE FRANCK MORTREUX SERGE LE GALL PATRIK CHIANTELLA CLAUDE FIANDRINO ANNIE BERNARD ISMAEL POUVREAU STEPHANE ROQUE D'ORBCASTEL EMMANUELLE 10.1016/j.aquaculture.2017.01.025 In situ spawning in a marine broadcast spawner, the Pacific oyster Crassostrea gigas : Timing and environmental triggers 2016 Wiley-blackwell BERNARD I. MASSABUAU J. -C. CIRET P. SOW M. SOTTOLICHIO ALDO POUVREAU STEPHANE TRAN D. 10.1002/lno.10240 Influence of gametogenesis pattern and sex on paralytic shellfish toxin levels in triploid Pacific oyster Crassostrea gigas exposed to a natural bloom of Alexandrium minutum 2016 Elsevier Science Bv HERMABESSIERE LUDOVIC FABIOUX C. LASSUDRIE MALWENN BOULLOT F. LONG MARC LAMBERT CHRISTOPHE LE GOIC N. GOURIOU JEREMIE LE GAC MICKAEL CHAPELLE ANNIE SOUDANT P. HEGARET HELENE 10.1016/j.aquaculture.2016.01.001 Exposure to the toxic dinoflagellate Alexandrium catenella modulates juvenile oyster Crassostrea gigas hemocyte variables subjected to different biotic conditions 2016 Academic Press Ltd- Elsevier Science Ltd Lassudrie Malwenn Soudant Philippe Nicolas Jean-Louis Miner Philippe Le Grand Jacqueline Lambert Christophe Le Goic Nelly Hegaret Helene Fabioux Caroline 10.1016/j.fsi.2016.02.017 Reproduction de l'huître creuse dans le Bassin d'Arcachon Année 2015 2016 Ifremer Maurer Daniele Auby Isabelle Hanrio Eliot Terrones Hippolyte Rigouin Loic Meteigner Claire Rumebe Myriam D'Amico Florence Tournaire Marie-Pierre Ganthy Florian Trut Gilles Navarro Romuald Simonnet Bastien Mayer Nicolas 10.13155/45450 Seasonal variation of sperm quality in Pacific oyster (Crassostrea gigas) 2016 Elsevier Science Bv SUQUET MARC MALO FLORENT QUEAU ISABELLE RATISKOL DOMINIQUE QUERE CLAUDIE LE GRAND JACQUELINE FAUVEL CHRISTIAN 10.1016/j.aquaculture.2016.07.016 Global change and climate-driven invasion of the Pacific oyster (Crassostrea gigas) along European coasts: a bioenergetics modelling approach 2016 Wiley-blackwell Thomas Yoann Pouvreau Stephane Alunno-Bruscia Marianne Barille Laurent Gohin Francis Bryere Philippe Gernez Pierre 10.1111/jbi.12665 Oyster mortality 2015 Wiley 10.2903/j.efsa.2015.4122 2015 Ifremer POUVREAU STEPHANE PETTON SEBASTIEN QUEAU ISABELLE HAURIE AXEL LE SOUCHU PIERRICK ALUNNO-BRUSCIA MARIANNE PALVADEAU HUBERT AUBY ISABELLE MAURER DANIELE D'AMICO FLORENCE PASSONI SARAH BARBIER CLAIRE TOURNAIRE MARIE-PIERRE RIGOUIN LOIC RUMEBE MYRIAM FLEURY ELODIE FOUILLARON PIERRE BOUGET JEAN-FRANCOIS PEPIN JEAN-FRANCOIS ROBERT STEPHANE GRIZON JAMES SEUGNET JEAN-LUC CHABIRAND JEAN-MICHEL LE MOINE OLIVIER GUESDON STEPHANE LAGARDE FRANCK MORTREUX SERGE LE GALL PATRIK MESSIAEN GREGORY ROQUE D'ORBCASTEL EMMANUELLE QUEMENER LOIC REPECAUD MICHEL MILLE DOMINIQUE GEAY AMELIE BOUQUET ANNE-LISE 10.13155/38990 Influence of low temperatures on the survival of the Pacific oyster (Crassostrea gigas) infected with Ostreid herpesvirus type 1 2015 Elsevier Science Bv Pernet Fabrice Tamayo David Petton Bruno 10.1016/j.aquaculture.2015.04.010 Factors influencing disease-induced mortality of Pacific oysters Crassostrea gigas 2015 Inter-research Petton Bruno Boudry Pierre Alunno-Bruscia Marianne Pernet Fabrice 10.3354/aei00125 2014 Ifremer POUVREAU STEPHANE PETTON SEBASTIEN QUEAU ISABELLE BELLEC GWENAEL TALARMAIN ERIC LE SOUCHU PIERRICK ALUNNO-BRUSCIA MARIANNE AUBY ISABELLE MAURER DANIELE D'AMICO FLORENCE PASSONI SARAH BARBIER CLAIRE TOURNAIRE MARIE-PIERRE RIGOUIN LOIC RUMEBE MYRIAM FLEURY ELODIE LANGLADE AIME BOUGET JEAN-FRANCOIS COLLIN KARINE FORTUNE MIREILLE PALVADEAU HUBERT BEDIER EDOUARD ROBERT STEPHANE PEPIN JEAN-FRANCOIS GRIZON JAMES SEUGNET JEAN-LUC CHABIRAND JEAN-MICHEL LE MOINE OLIVIER GUESDON STEPHANE LAGARDE FRANCK MORTREUX SERGE LE GALL PATRIK MESSIAEN GREGORY ROQUE D'ORBCASTEL EMMANUELLE QUEMENER LOIC REPECAUD MICHEL BUCAS KARENN BARBOT STEPHANE GUILLEMOT ANNE NONNOTTE LIDWINE DUROS WENCESLAS BONNAT ARMEL TAROT STEPHANE MILLE DOMINIQUE GEAY AMELIE BOUQUET ANNE-LISE 10.13155/31091 Proteomic identification of quality factors for oocytes in the Pacific oyster Crassostrea gigas 2012 Elsevier Science Bv CORPOREAU CHARLOTTE VANDERPLANCKE GWENAELLE BOULAIS MYRINA SUQUET MARC QUERE CLAUDIE BOUDRY PIERRE HUVET ARNAUD MADEC STEPHANIE 10.1016/j.jprot.2012.07.040 Effect of phytoplankton and temperature on the reproduction of the Pacific oyster Crassostrea gigas: investigation through DEB theory 2011 Elsevier Science Bv BERNARD ISMAEL DE KERMOYSAN GOULWEN POUVREAU STEPHANE 10.1016/j.seares.2011.07.009 ECOSCOPA network : National monitoring network of mortality and growth rates of the sentinel oyster Crassostrea gigas 2025 SEANOE Lagarde Franck Le Roy Valerian Pouvreau Stephane Fleury Elodie Petton Sébastien 10.17882/53007 ECOSCOPA network : high frequency environmental database 2025 SEANOE Petton Sebastien Pouvreau Stephane Fleury Elodie Lagarde Franck 10.17882/86131 Harmful algae niche response(s) to environmental and community variation along the French coast. 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