seanoe:87816 NORMAND Julien IFREMER, Dept ODE, UL-LERN, Av. du Général de Gaulle - BP 32 - 14520 Port en Bessin 2025-04-17 ISO 19115:2003/19139 1.0 The Mytilobs network datasets 2025-04-17 2025-04-17 Normand Julien, Lemesle Stephanie, Grizon James, Louis Wilfried (2025). The Mytilobs network datasets. SEANOE. https://doi.org/10.17882/87816 The Mytilobs network, carried out by IFREMER (French Research Institute for Exploitation of the Sea), is a national network dedicated to building long-term physiological variations time series of blue mussels (Mytilus edulis), across a large spatial scale. This observation network, initially designed to survey production yields, also provides valuable data to track environmental variations of coastal ecosystems. Mussels exhibit high phenotypic plasticity in response to environmental variations. Collection of data describing phenotypic variations, over an extended period, reveals small-scale climate and habitat variations. With its broad deployment across time and space, the data produced under Mytilobs will be useful for the establishment of a baseline condition when studying the effect of a perturbation affecting an ecosystem’s functioning. Finally, the monitoring of mussel biometric traits and mortality was coupled with high-frequency measurements of salinity, temperature, and sea level, complementing this multi-layer observational framework. BOUGET Jean-Francois COSTES Louis Louis.Costes@ifremer.fr CHABIRAND Jean-Michel CHEVÉ Julien COSTES Louis DAGAULT Francoise DEBORDE Jonathan FONTAINE Bruno GABELLEC Raoul GEAIRON Philippe GERLA Daniel GUESDON Stephane GUEUX Aurore HALM-LEMEILLE Marie-Pierre JACQUELINE Franck LE GALL Patrik LE MOINE Olivier LEGENDRE Aurelie LEJOLIVET Aurore MARY Charlotte PENOT Julia PALVADEAU Hubert PEPIN Jean-Francois PIERRE DUPLESSIX Olivier ROBERT Stephane SEUGNET Jean-Luc SIMON Benjamin SOLETCHNIK Patrick NORMAND Julien IFREMER, Dept ODE, UL-LERN, Av. du Général de Gaulle - BP 32 - 14520 Port en Bessin LEMESLE Stephanie IFREMER, Dept ODE, UL-LERN, Av. du Général de Gaulle - BP 32 - 14520 Port en Bessin GRIZON James IFREMER, Dept ODE, UL-LERPC, Av. de Mus de Loup - Ronce les Bains - 17390 La Tremblade LOUIS Wilfried IFREMER, Dept ODE, UL-LERN, Av. du Général de Gaulle - BP 32 - 14520 Port en Bessin SEANOE https://www.seanoe.org/data/00766/87816/illustration.gif Fisheries and aquaculture Invertebrates Salinity Sea temperature ODATIS aggregation parameters and Essential Variable names 2024-09-16 geonetwork.thesaurus.external.theme.NVS.OD1 Fisheries and aquaculture SeaDataNet Parameter Disciplines 2021-04-07 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 (Creative Commons - Attribution) Response to selection for cytogenetic status and their relationship with mortality in Mytilus edulis and Mytilus galloprovincialis in France 2025 Elsevier BV Munusamy Ajithkumar Dégremont Lionel Garcia Celine Ledu Christophe Benabdelmouna Abdellah 10.1016/j.aquaculture.2024.741912 Rapport Final GT HUITRE 2024 Ifremer Gueguen Yannick Arzul Isabelle Goulletquer Philippe 10.13155/104304 2017 Ifremer PEPIN JEAN-FRANCOIS BENABDELMOUNA ABDELLAH DEGREMONT LIONEL GUESDON STEPHANE LE MOINE OLIVIER MORGA BENJAMIN BIERNE NICOLAS TRAVERS MARIE-AGNES ROBERT STEPHANE SOLETCHNIK PATRICK 10.13155/50288 2016 Ifremer TRAVERS MARIE-AGNES PEPIN JEAN-FRANCOIS SOLETCHNIK PATRICK GUESDON STEPHANE LE MOINE OLIVIER 10.13155/43539 oceans -5.746672 6.294343 42.842066 51.780013 2014 2024 TEXTE https://www.seanoe.org/data/00766/87816/#118989 WWW:DOWNLOAD-1.0-link--download Quality controlled data 2014 - 2024 data - 16 MB https://www.seanoe.org/data/00766/87816/ WWW:DOWNLOAD-1.0-link--download Quality controlled data 2014 - 2023 data [RESTRICTED] - 8 MB https://www.seanoe.org/data/00766/87816/ WWW:DOWNLOAD-1.0-link--download Quality controlled data 2014-2022 data [RESTRICTED] - 13 MB https://doi.org/10.17882/87816 WWW:LINK-1.0-http--metadata-URL DOI of the product https://www.seanoe.org/data/00766/87816/ rel-canonical Seanoe The survey strategy was drafted from the RESCO protocol which is the national benchmark survey strategy for Pacific oysters, implemented since 1993. For mussels, the Mytilobs monitoring program began in 2014 and has been conducted since then on a yearly basis. Each year, one batch of mussels of less than one year old is taken from the same cohort of spat and is distributed simultaneously to different network locations (4 to 9 locations) along the Atlantic and Channel coasts of France. Mussels were taken from a wild spatfall, occuring in spring, in the Breton Sound (inshore part of the Bay of Biscay, between the Isle of Ré and the French coast). Mussels from this area are known to belong to the M. edulis species. For each site, around 14 small plastic meshed bags containing 120 to 200 mussels were deployed in autumn of the year before the annual survey. After a 2-month acclimatization period, annual monitoring began in January. Every month, field operators counted dead and alive individuals of the same single bag and systematically removed empty shells of dead mussels. Another bag was taken back to the laboratory for measurements. Concurrently, field agents immersed a CTD data logger to measure and record salinity, pressure and temperature. SEANOE deposit contains 3 datasets in csv format. The mortality dataset contains observations related to mortalities obtained from the successive counts of the mussels contained in one meshed bag over the course of the annual survey. For this dataset, one line corresponds to observations taken for one batch of mussels, on one site and on one day. The variable “cumulative mortality” describes the proportion of dead individuals of the initial batch that died from unknown reasons. It has been calculated following Normand et al. 2022, but cannot be directly inferred from variables “alive_nb” and “dead_nb” because “alive_nb” could have fluctuated over the annual survey due to whelk predation or sampling for other research programs. The columns of the mortality dataset are : - year (the id of the annual survey [discrete variable: 11 levels from 2014 to 2024]), - location (the id of the location [discrete variable: 9 levels]), - latitude (the latitude of the location, in WGS 84 decimal degrees [continuous variable]), - longitude (the longitude of the location, in WGS 84 decimal degrees [continuous variable]), - day (the day the sample was collected [continuous variable]), - alive_nb (the number of live individuals in the bag [continuous variable]), - dead_nb (the number of dead individuals in the bag [continuous variable]), - cum_morta (cumulative mortality, in percent [continuous variable]). The growth dataset contains observations related to mussel dimensions obtained by measurements of 30 to 50 individuals in the laboratory. For this dataset, one line corresponds to observations made on one mussel, from one batch, on one site and on one day. The columns of the growth dataset are : - year (the id of the annual survey [discrete variable: 11 levels from 2014 to 2024]), - location (the id of the location [discrete variable: 9 levels]), - latitude (the latitude of the location, in WGS 84 decimal degrees [continuous variable]), - longitude (the longitude of the location, in WGS 84 decimal degrees [continuous variable]), - day (the day the sample was collected on [continuous variable]), - length (the length of the mussel, in millimeters [continuous variable]), - width (the width of the mussel, in millimeters [continuous variable]), - thickness (the thickness of the mussel, in millimeters [continuous variable]), - totwght (the total weight of the mussel, closed, including the weight of the water retained in the mantel cavity, in grams [continuous variable]), - shellwght (the weight of the two valves after desiccation, in grams [continuous variable]), - softwght (the weight of the soft tissues after desiccation in grams [continuous variable]). The environment dataset contains the data collected by the probes when submerged. The frequency is of one record every 15 minutes. The columns of the environment dataset are : - time (year, month, day, hour, minute and second. Every data was recorded, in TU [continuous variable]), - location (the id of the location [discrete variable: 9 levels]), - latitude (the latitude of the location, in WGS 84 decimal degrees [continuous variable]), - longitude (the longitude of the location, in WGS 84 decimal degrees [continuous variable]), - temp (seawater temperature in degree Celsius [continuous variable]), - wght (seawater height above the probe, in meters [continuous variable]), - sal (seawater salinity in grams per liter [continuous variable]). Observations were collected for the following Locations and Years: - Agon : 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2023, 2024 - Aiguillon : 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022 - Boyard : 2015, 2016, 2017, 2018, 2019, 2023, 2024 - Filière : 2014, 2015, 2016, 2017, 2018, 2019, 2020 - Maison Blanche : 2016, 2017, 2018, 2019, 2020, 2021 - Pont-Mahé : 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2023, 2024 - Roulières : 2015, 2016, 2017, 2018 - Vivier : 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2023, 2024 - Yves : 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021 Reference : Normand Julien, Benabdelmouna Abdellah, Louis Wilfried, Grizon James (2022). MYTILOBS Campagne 2020-2021. Réseau d'observation des moules d'élevage sur la côte Atlantique et dans la Manche. Edition 2022. RST ODE/UL/LERN/22-05. https://archimer.ifremer.fr/doc/00834/94562/