seanoe:62260 data@seanoe.org 2021-05-12 ISO 19115:2003/19139 1.0 Minimum level of taxonomic identification of benthic invertebrates by-catches on Ifremer's fisheries vessel 2019-08 2021-05-12 Hazevis Gaëtan, Baudrier Jerome, Vaz Sandrine (2019). Minimum level of taxonomic identification of benthic invertebrates by-catches on Ifremer's fisheries vessel. SEANOE. https://doi.org/10.17882/62260 Ifremer conducts numerous fisheries surveys dedicated to benthic and demersal populations (commercial / non-commercial fishes and invertebrates). For several years, in application of the ecosystem approach, all benthic invertebrate fauna collected in fishing gear has been systematically monitored: megabenthic invertebrates captured have been sorted, identified, counted and weighted. All these surveys are based on fixed or random stratified sampling strategy with varying intensity depending on the covered survey area. These data are stored, in historical access-based databases or for the most recent years in the centralised “Harmonie” database held in the Ifremer Fishery Information Systeme (SIH). The species nomenclature used was standardized using WoRMS database. Taxa caught at least once a year are listed for each monitoring area on the basis of already available data series. In order to facilitate the identification of individuals sampled on board vessels and to improve the training of onboard scientists, the present work aims to define the minimum level of identification for each of them. The analysis identifies taxa that appears recurrently on available historical series or gathers them on less precise taxonomic levels if this is not the case, which may indicate potential identification difficulties. The following procedure was used: all taxa expressed at the species level were first aggregated at genus level if they occurred less 90% of the years over the available time series. For MEDITS, EPIBENGOL and ORHAGO, the occurrence threshold was set to 70% and to only 50% for NOURMONT because the datasets were less than 10 years long. Then to be kept at that taxonomic level, a given genus had to be observed over 90% of the time (for example over at least 9 years if the dataset contains 10 years). Otherwise it was iteratively regrouped into a higher taxonomic level (family, order, class, division) following the same criteria (Foveau et al, 2017). For instance, for the NOURSEINE survey, this resulted into the aggregation of the 103 origin taxa into 35 taxonomic groups. The name of the final taxon after data processing represents the minimum level of identification defined by the analysis. However, these results are very theoretical. This is why they were sent to scientists who embark regularly in order to refine the level of taxonomic identification with field experience. The first dataset is composed of 8 tables relevant to the different vessel surveys. The first column of each table represents the permanent code of the taxon in the Ifremer taxonomic referential, the second the systematic number and the third the species abbreviated code. The other columns are the different taxonomic levels of the taxon. The minimum level of identification at sea defined by the data processing appears in blue. The level determined by feedback of scientist’s field experience, which is the one to use at sea, appears in green. The second dataset summaries the results detailed in the first table and indicates directly for each taxon identified to far, the minimum level of identification required for the benthic invertebrates by-catch of each fisheries surveys studied. The authors want to thank all the scientific staff and vessel crews who collect data used in this study and everyone who contributed to the proposition of the minimum level of taxonomic identification. Hazevis Gaëtan Ifremer Nantes, Département Océanographie et Dynamique des Ecosystèmes, Service Valorisation de l’Information pour la Gestion Intégrée Et la Surveillance BAUDRIER Jerome Ifremer Nantes, Département Océanographie et Dynamique des Ecosystèmes, Service Valorisation de l’Information pour la Gestion Intégrée Et la Surveillance VAZ Sandrine Unité MARine Biodiversity Exploitation and Conservation, Ifremer Sète, Université de Montpellier, IRD, CNRS SEANOE https://www.seanoe.org/data/00511/62260/illustration.gif Sorting and identification of benthic fauna Marine Strategy Framework Directive benthic fauna fisheries research surveys taxonomic level identification Fisheries and aquaculture Invertebrates 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-ND (Creative Commons - Attribution, No modification) Data are published without any warranty, express or implied. The user assumes all risk arising from his/her use of data. Data are intended to be research-quality, but it is possible that these data themselves contain errors. It is the sole responsibility of the user to assess if the data are appropriate for his/her use, and to interpret the data, data quality, and data accuracy accordingly. Authors welcome users to ask questions and report problems. Process-driven and biological characterisation and mapping of seabed habitats sensitive to trawling 2017 Public Library Science FOVEAU AURELIE VAZ SANDRINE DESROY NICOLAS KOSTYLEV VLADIMIR E. 10.1371/journal.pone.0184486 Benthic invertebrates’ by-catches in Ifremer bottom trawl surveys in the English Channel and Southern North Sea: 2006-2018 observations 2019 SEANOE Vaz Sandrine Auber Arnaud Coppin Franck Desroy Nicolas Foveau Aurelie Goascoz Nicolas Lazard Coline Le Roy Didier Martin Jocelyne Quinquis Jerome Rouquette Manuel Travers-Trolet Morgane Verin Yves 10.17882/59595 10.17600/14001900 10.18142/11 10.18142/24 10.17600/18000589 10.18142/8 10.18142/17 10.18142/7 10.18142/244 10.18142/22 10.18142/138 10.18142/23 oceans -12.0 10.0 41.0 56.0 XLS, XLSX https://www.seanoe.org/data/00511/62260/data/66461.xls WWW:DOWNLOAD-1.0-link--download Processed data ID Taxa - 1 MB https://www.seanoe.org/data/00511/62260/data/66462.xls WWW:DOWNLOAD-1.0-link--download Processed data Synthetic ID taxa - 493 KB https://doi.org/10.17882/62260 WWW:LINK-1.0-http--metadata-URL DOI of the product https://www.seanoe.org/data/00511/62260/ rel-canonical Seanoe Data provided in these files are raw data processed. Raw data are collected by beam trawl on ORHAGO and nursery surveys, Very High Vertical Opening (VHVO) bottom trawls (or “GOV”) on IBTS, CGFS, CAMANOC, EVHOE, MEDITS, EPIBENGOL surveys and dredge on COMOR survey. Fisheries vessel surveys are carried out either on board of Research Vessels or professional fishing vessels where sampling gears are well adapted for catching demersal species (in particular fish and cephalopods). Temporal series used on this study are the following ones: - NURSE: 2000-2005 / 2008-2010 / 2012 / 2014-2017 - NOURSEINE: 1995-1998 / 2000-2002 / 2008-2010 / 2017-2018 - NOURMONT: 2017-2018 - IBTS/CGFS: 2006-2018 and CAMANOC: 2014 - EVHOE: 2008-2018 - MEDITS: 2012-2018 and EPIBENGOL: 2018 - ORHAGO: 2011-2018 - COMOR: 1998-2016