c71562ae-3afd-446f-879d-3e8eb21794ae Patrizia Giordano National Research Council (CNR), Institute of Polar Sciences (ISP) Researcher patrizia.giordano@cnr.it 0000-0001-5662-2659 Alessandro Nicolai Ca’ Foscari University; National Research Council (CNR), Institute of Polar Sciences (ISP) PhD student alessandro.nicolai@unive.it 0009-0005-7564-3697 Jessica Titocci National Research Council (CNR), Institute of Research on Terrestrial Ecosystems (IRET) Research Technologist jessica.titocci@cnr.it 0000-0001-9157-1578 Patrizia Giordano National Research Council (CNR), Institute of Polar Sciences (ISP) Researcher patrizia.giordano@cnr.it 0000-0001-5662-2659 Alessandro Nicolai Ca’ Foscari University; National Research Council (CNR), Institute of Polar Sciences (ISP) PhD student alessandro.nicolai@unive.it 0009-0005-7564-3697 Jessica Titocci National Research Council (CNR), Institute of Research on Terrestrial Ecosystems (IRET) Research Technologist jessica.titocci@cnr.it 0000-0001-9157-1578 Ilaria Rosati National Research Council (CNR), Institute of Research on Terrestrial Ecosystems (IRET) Technologist ilaria.rosati@cnr.it 0000-0003-3422-7230 Custodian Steward Mariantonietta La Marra National Research Council (CNR), Institute of Research on Terrestrial Ecosystems (IRET) Research Fellow mariantoniettalamarra@cnr.it 0009-0002-2070-7778 Information Manager 2026-11-02 English This dataset provides individual-level morphological and reproductive trait data for Arctic deep-sea copepods of the genus Paraeuchaeta, collected at the oceanographic mooring S1 in the south-eastern Fram Strait (Arctic Ocean) between 2015 and 2024. Specimens were collected using sediment traps deployed at two depths (516 and 1002 m) and include different developmental stages, from eggs and nauplii to copepodites and adults. The dataset includes taxonomic information on Paraeuchaeta norvegica, P. barbata barbata, and P. glacialis, along with developmental stages, sex identification, and a range of morphometric measurements related to body size, anatomical structures, and reproductive characteristics. Reproductive traits include measurements of eggs and egg sacs, providing information on reproductive investment and offspring characteristics. This dataset provide a valuable resource for investigating interspecific and ontogenetic morphological variability, reproductive strategies, and functional trait diversity in Arctic deep-sea copepods, supporting comparative trait-based ecological studies. Sediment trap Sandy Beach Thesaurus Paraeuchaeta NCBI Zooplankton Environmental Thesaurus Arctic Ocean Marine Regions Morphological trait Life history trait Life stage Egg size Traits Thesaurus Free for use, including sharing and adaptation, by all individuals provided that the owners are acknowledged in any use or publication. cc-by http://creativecommons.org/licenses/by/4.0/ This dataset represents a contribution from the Projects: “HORIZON-CL6-2023-Zero Pollution ICEBERG - Innovative Community Engagement for Building Effective Resilience and Arctic Ocean pollution-control Governance in the context of climate change” (CUP B63C23001840006); “EU-Next Generation IR0000032 PNRR-ITINERIS - Italian Integrated Environmental Research Infrastructures System” (CUP B53C22002150006); “ATTRACTION-ATlantificaTion dRiven by polAr-subpolar ConnecTIONs in a changing climate: integrating observational evidence, paleo-oceanography and modelling over the last thousand years at the gateway of the Arctic Ocean”, by the Italian Ministry of University and Research (grant 2022CCRN7R). DOI https://doi.org/10.48372/g59s-q055 Info and download page on LifeWatch Italy Data Portal https://data.lifewatchitaly.eu/handle/123456789/326436 The dataset covers the deep-sea oceanographic mooring site S1, deployed along the continental slope of the south-eastern Fram Strait at 1004 m depth. 13.9484 13.9484 76.4381 76.4381 -1004 -514 meter 2015-12-01 2024-05-01 Subspecies Paraeuchaeta barbata barbata 1507271 Species Paraeuchaeta glacialis 104560 Species Paraeuchaeta norvegica 104566 Genus Paraeuchaeta 196874 http://www.w3.org/ns/dcat#keyword http://purl.bioontology.org/ontology/NCBITAXON/136185 http://www.w3.org/ns/dcat#keyword http://vocabs.lter-europe.net/EnvThes/USLterCV_641 http://www.w3.org/ns/dcat#keyword http://marineregions.org/mrgid/1906 http://www.w3.org/ns/dcat#keyword https://kos.lifewatch.eu/thesauri/sandybeachthes/c_df8171e7 http://www.w3.org/ns/dcat#keyword https://kos.lifewatch.eu/thesauri/traits/Morphological_Trait http://www.w3.org/ns/dcat#keyword https://kos.lifewatch.eu/thesauri/traits/c_07e68778 http://www.w3.org/ns/dcat#keyword https://kos.lifewatch.eu/thesauri/traits/c_f4d8fb0a http://www.w3.org/ns/dcat#keyword https://kos.lifewatch.eu/thesauri/traits/c_151c000c Patrizia Giordano National Research Council (CNR), Institute of Polar Sciences (ISP) Researcher patrizia.giordano@cnr.it 0000-0001-5662-2659 Jessica Titocci National Research Council (CNR), Institute of Research on Terrestrial Ecosystems (IRET) Research Technologist jessica.titocci@cnr.it 0000-0001-9157-1578 Zooplankton specimens were collected using two automated sediment traps deployed at the S1 mooring site: a McLane sediment trap (Mod 78HW, 13 receiving cups, 0.5 m² collecting area) positioned at 1002 m depth (2015–2024) and a Technicap sediment trap positioned at 516 m depth (2022–2023). Sampling intervals ranged from 15 to 30 days, with shorter intervals during summer and longer intervals during winter. Some scheduled samples at 1002 m depth were lost due to sediment trap rotation failures and maintenance delays. Collection cups were prefilled with filtered (0.45 µm) Arctic seawater containing 5% buffered formaldehyde solution. McLane (Mod 78HW, 13) and Technicap sediment trap Taxonomic identification was validated using the Taxon Match tool provided by the World Register of Marine Species (WoRMS) to ensure taxonomic consistency and the use of accepted scientific names. Data templates and accompanying metadata guides were generated using the Data Template Builder (https://phytovre.itineris.cnr.it/data-template-builder/). Data standardisation followed the Darwin Core (DwC) standard and the Traits Thesaurus (https://doi.org/10.48373/sa6p-ta25) , supporting semantic consistency, interoperability and data reuse. Zooplankton samples were collected using two automated sediment traps deployed at the S1 mooring site: a McLane sediment trap (Mod 78HW, 13 receiving cups, 0.5 m² collecting area) positioned at 1002 m depth and a Technicap sediment trap positioned at 516 m depth. The McLane trap collected samples from 2014 to 2024, while the Technicap trap operated in 2022 and 2023. Sampling intervals ranged from 15 to 30 days, with shorter intervals in summer and longer intervals in winter. Collection cups were prefilled with Arctic seawater filtered through a 0.45 µm filter and containing 5% buffered formaldehyde solution to preserve the collected material and prevent specimen degradation during deployment. After recovery, samples were stored in the dark at 4°C until laboratory processing. Some scheduled samples at 1002 m depth were lost due to sediment trap rotation failures and maintenance delays. The data concern Paraeuchaeta specimens collected at the deep-sea oceanographic mooring site S1 (76.4381°N, 13.9484°E), located along the continental slope of the south-eastern Fram Strait, Svalbard. Samples were collected at 516 m depth (2022–2023) and 1002 m depth (2015–2024), with sampling intervals ranging from 15 to 30 days. Taxonomic identification was validated using the Taxon Match tool provided by the World Register of Marine Species (WoRMS) to ensure taxonomic consistency and the use of accepted scientific names. Data templates and accompanying metadata were generated using the Data Template Builder. Data standardisation followed the Darwin Core (DwC) standard and the Traits Thesaurus, supporting semantic consistency, interoperability, and data reuse. Patrizia Giordano National Research Council (CNR), Institute of Polar Sciences (ISP) Researcher patrizia.giordano@cnr.it 0000-0001-5662-2659 Principal Investigator Jessica Titocci National Research Council (CNR), Institute of Research on Terrestrial Ecosystems (IRET) Research Technologist jessica.titocci@cnr.it 0000-0001-9157-1578 Author Alessandro Nicolai Ca’ Foscari University; National Research Council (CNR), Institute of Polar Sciences (ISP) PhD student alessandro.nicolai@unive.it 0009-0005-7564-3697 Author Individual-level morphological and reproductive traits of Arctic deep-sea Paraeuchaeta spp. from the south-eastern Fram Strait Morphological_and_reproductive_traits_Paraeuchaeta_Fram_Strait_dataset.csv 571334 MD5:72131e8f542661a5874b5ca538a303c8 UTF-8 1 column ; catalogNumber Catalog Number An identifier (preferably unique) for a resource within a collection. Any Text http://ecoinformatics.org/oboe/oboe.1.2/oboe-core.owl#hasContext http://rs.tdwg.org/dwc/terms/catalogNumber country Country The name of the country or major administrative unit in which the dcterms:Location occurs. Any Text http://ecoinformatics.org/oboe/oboe.1.2/oboe-core.owl#hasContext http://rs.tdwg.org/dwc/terms/country countryCode Country Code The standard code for the country in which the dcterms:Location occurs. Any Text http://ecoinformatics.org/oboe/oboe.1.2/oboe-core.owl#hasCode http://rs.tdwg.org/dwc/terms/countryCode location Location A spatial region or named place. Any Text http://ecoinformatics.org/oboe/oboe.1.2/oboe-core.owl#hasContext http://purl.org/dc/terms/Location locationID Location ID An identifier for a dcterms:Location. 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Any Text http://ecoinformatics.org/oboe/oboe.1.2/oboe-core.owl#hasContext http://rs.tdwg.org/dwc/terms/verbatimIdentification kingdom Kingdom The full scientific name of the kingdom in which the dwc:Taxon is classified. Any Text http://ecoinformatics.org/oboe/oboe.1.2/oboe-core.owl#hasContext http://rs.tdwg.org/dwc/terms/kingdom phylum Phylum The full scientific name of the phylum or division in which the dwc:Taxon is classified. Any Text http://ecoinformatics.org/oboe/oboe.1.2/oboe-core.owl#hasContext http://rs.tdwg.org/dwc/terms/phylum class Class The full scientific name of the class in which the dwc:Taxon is classified. Any Text http://ecoinformatics.org/oboe/oboe.1.2/oboe-core.owl#hasContext http://rs.tdwg.org/dwc/terms/class order Order The full scientific name of the order in which the dwc:Taxon is classified. 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Any Text http://ecoinformatics.org/oboe/oboe.1.2/oboe-core.owl#hasContext http://rs.tdwg.org/dwc/terms/acceptedNameUsage acceptedNameUsageID Accepted Name Usage ID An identifier for the name usage (documented meaning of the name according to a source) of the currently valid (zoological) or accepted (botanical) taxon. Any Text http://ecoinformatics.org/oboe/oboe.1.2/oboe-core.owl#hasCode http://rs.tdwg.org/dwc/terms/acceptedNameUsageID taxonRank Taxon Rank The taxonomic rank of the most specific name in the dwc:scientificName. Any Text http://ecoinformatics.org/oboe/oboe.1.2/oboe-core.owl#hasContext http://rs.tdwg.org/dwc/terms/taxonRank lifeStage Life Stage The developmental stage of life of an organism. Egg Egg https://kos.lifewatch.eu/thesauri/traits/c_14a935f3 Presence of egg sac An organism characterized by the presence of one or more external egg sacs which are reproductive structures containing and protecting developing eggs. https://kos.lifewatch.eu/thesauri/traits/c_c4e9ffb0 Naupliar stage Earliest larval stage of many crustaceans with three pairs of appendages a median eye and little or no segmentation. https://kos.lifewatch.eu/thesauri/traits/c_06b3adb5 Copepodite stage II A development stage of copepods which immediately follows copepodite stage 1. It is characterized by the presence of 3 swimming legs. https://kos.lifewatch.eu/thesauri/traits/c_18e5695a Copepodite stage III A development stage of copepods which immediately follows copepodite stage 2. It is characterized by the presence of 4 swimming legs. https://kos.lifewatch.eu/thesauri/traits/c_8d7ed007 Copepodite stage IV A development stage of copepods which immediately follows copepodite stage 3. It is characterized by the presence of 5 swimming legs. https://kos.lifewatch.eu/thesauri/traits/c_361ffb10 Copepodite stage V A pre-adult stage of copepods which immediately follows copepodite stage 4. It ischaracterized by enlargement of the urosome and development of sexual organs. https://kos.lifewatch.eu/thesauri/traits/c_17748669 Adult stage An organism that is fully grown or sexually mature. https://kos.lifewatch.eu/thesauri/traits/c_ac9342d2 http://ecoinformatics.org/oboe/oboe.1.2/oboe-core.owl#ofCharacteristic https://kos.lifewatch.eu/thesauri/traits/c_f4d8fb0a sex Sex The sex of an organism. Female Denoting sex of a female individual. https://kos.lifewatch.eu/thesauri/traits/c_c4a93913 Male Denoting sex of a male individual. https://kos.lifewatch.eu/thesauri/traits/c_940c5444 http://ecoinformatics.org/oboe/oboe.1.2/oboe-core.owl#ofCharacteristic https://kos.lifewatch.eu/thesauri/traits/c_9822141d organismQuantity Organism Quantity A number or enumeration value for the quantity of dwc:Organisms. number real http://ecoinformatics.org/oboe/oboe.1.2/oboe-core.owl#hasContext http://rs.tdwg.org/dwc/terms/organismQuantity organismRemarks Organism Remarks Comments or notes about the dwc:Organism instance. 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Cubic millimeter real http://ecoinformatics.org/oboe/oboe.1.2/oboe-core.owl#containsMeasurementsOfType https://kos.lifewatch.eu/thesauri/traits/c_6da42e35 prosomeLength Prosome Length The maximum linear distance measured from the anterior to the posterior end of the prosome. millimeter real http://ecoinformatics.org/oboe/oboe.1.2/oboe-core.owl#containsMeasurementsOfType https://kos.lifewatch.eu/thesauri/traits/c_fdda62ec prosomeWidth Prosome Width The maximum linear distance measured across the prosome, perpendicular to its longest axis. millimeter real http://ecoinformatics.org/oboe/oboe.1.2/oboe-core.owl#containsMeasurementsOfType https://kos.lifewatch.eu/thesauri/traits/c_0379fa15 antennulaeLength Antennulae Length The linear measurement of the first pair of antennae (antennules) from their basal articulation on the head region to their distal tip. millimeter real http://ecoinformatics.org/oboe/oboe.1.2/oboe-core.owl#containsMeasurementsOfType https://kos.lifewatch.eu/thesauri/traits/c_c7b372c2 maxillipedLength Maxilliped Length The length of a maxilliped, measured from its proximal attachment to its distal extremity. scopeNote: Maxillipeds are modified appendages of crustaceans located behind the maxillae and primarily involved in feeding, including food collection, handling, and transfer to the mouth. Their number, morphology, and measurement methods may vary among taxa. millimeter real http://ecoinformatics.org/oboe/oboe.1.2/oboe-core.owl#containsMeasurementsOfType https://kos.lifewatch.eu/thesauri/traits/c_5e883808 fifthPereopodLength Fifth Pereopod Length The length of the fifth pereopod, measured from its proximal attachment to its distal extremity. millimeter real http://ecoinformatics.org/oboe/oboe.1.2/oboe-core.owl#containsMeasurementsOfType https://kos.lifewatch.eu/thesauri/traits/c_ab1a8aa9 urosomeLength Urosome Length The linear distance measured from the anterior to the posterior end of the urosome. millimeter real http://ecoinformatics.org/oboe/oboe.1.2/oboe-core.owl#containsMeasurementsOfType https://kos.lifewatch.eu/thesauri/traits/c_c4f3a09e genitalSomiteLength Genital Somite Length The length of the genital segment (somite) in adult individuals, measured from its anterior to posterior margin. millimeter real http://ecoinformatics.org/oboe/oboe.1.2/oboe-core.owl#containsMeasurementsOfType https://kos.lifewatch.eu/thesauri/traits/c_02f6b8c7 genitalSomiteWidth Genital Somite Width The transverse dimension (lateral width) of the genital somite, measured at its widest point across the body axis. millimeter real http://ecoinformatics.org/oboe/oboe.1.2/oboe-core.owl#containsMeasurementsOfType https://kos.lifewatch.eu/thesauri/traits/c_19de65ec genitalProminenceLength Genital Prominence Length The length of the genital prominence, measured in lateral view from its base to its distal tip. scopeNote: The genital prominence is a ventral protrusion of the genital double-somite in female copepods. Its morphology and measurement methods may vary among taxa. millimeter real http://ecoinformatics.org/oboe/oboe.1.2/oboe-core.owl#containsMeasurementsOfType https://kos.lifewatch.eu/thesauri/traits/c_b40d49f4 genitalProminenceWidth Genital Prominence Width The width of the genital prominence, measured in lateral view perpendicular to its longitudinal axis. scopeNote: The genital prominence is a ventral protrusion of the genital double-somite in female copepods. Its morphology and measurement methods may vary among taxa. millimeter real http://ecoinformatics.org/oboe/oboe.1.2/oboe-core.owl#containsMeasurementsOfType https://kos.lifewatch.eu/thesauri/traits/c_e9c13bd1 caudalRamusLength Caudal Ramus Length The length of one caudal ramus (or the average of the pair) measured from the base (posterior margin of the urosome) to the distal tip of the ramus. millimeter real http://ecoinformatics.org/oboe/oboe.1.2/oboe-core.owl#containsMeasurementsOfType https://kos.lifewatch.eu/thesauri/traits/c_c6f5d740 caudalRamusWidth Caudal Ramus Width The width of one caudal ramus (or the average of the pair), measured perpendicular to its longitudinal axis. millimeter real http://ecoinformatics.org/oboe/oboe.1.2/oboe-core.owl#containsMeasurementsOfType https://kos.lifewatch.eu/thesauri/traits/c_f01c21a6 colour Colour The characteristic colour or colour pattern of an organism, perceived in terms of hue, saturation and intensity, resulting from the absorption and reflection of specific wavelengths of light by pigments and/or structural features. Any Text http://ecoinformatics.org/oboe/oboe.1.2/oboe-core.owl#ofCharacteristic https://kos.lifewatch.eu/thesauri/traits/c_ec60ea56 eggDiameter Egg Diameter The maximum linear distance measured across the egg at its widest point. millimeter real http://ecoinformatics.org/oboe/oboe.1.2/oboe-core.owl#containsMeasurementsOfType https://kos.lifewatch.eu/thesauri/traits/c_463aa842 eggVolume Egg Volume The three-dimensional size of an individual egg, expressed as a volume. Egg volume is typically calculated from measured egg dimensions (e.g., diameter, length, width, height), assuming a geometric shape such as a sphere or ellipsoid. 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Cubic millimeter real http://ecoinformatics.org/oboe/oboe.1.2/oboe-core.owl#containsMeasurementsOfType https://kos.lifewatch.eu/thesauri/traits/c_7c42378e clutchSize Clutch Size The number of eggs produced by a female individual in a “clutch” or a single reproductive event. number real http://ecoinformatics.org/oboe/oboe.1.2/oboe-core.owl#containsMeasurementsOfType https://kos.lifewatch.eu/thesauri/traits/c_8e50af57 clutchVolume Clutch Volume The total volume of eggs in a clutch. scopenote:Clutch volume is commonly estimated as the product of clutch size and mean individual egg volume. It represents the combined volume of the eggs, excluding the spaces between them and any surrounding egg-bearing structures. Cubic millimeter real http://ecoinformatics.org/oboe/oboe.1.2/oboe-core.owl#containsMeasurementsOfType https://kos.lifewatch.eu/thesauri/traits/c_995c3550 1167