Description
Mega-benthos was sampled from the seabed by the Nansen Legacy joint cruise 1-2, on R/V Kronprins Haakon, 6-23 August 2018 (Cruise 2018707). A Campelen 1800 bottom trawl was used after rigged with rock-hopper ground gear and towed on double warps. The mesh size was 80 mm (stretched) in the front and 16–22 mm in the cod end. The horizontal opening was 11.7 m, and the vertical opening 4 –5 m. The trawl configuration and bottom contact was monitored remotely by SCANMAR trawl sensors. The standard procedure is to tow 15 min after the trawl had contacted the bottom with towing speed of 3 knots, equivalent to a towing distance of 0.75 nautical miles (1.4 km) during a 15 min tow. The trawl settings allow the capture and retention of small-sized fish and the largest benthos (benthic megafauna) from the seabed. In addition, the trawl may also be contaminated by organisms entering the trawl when it is lowered or heaved. The sample was sorted, and each benthos taxon was counted and weighted (i.e., biomass is wet mass) and identified to closest possible taxa onboard the ship. The count of individuals per species/taxa in the trawl (Tot abun) and the wet-weight of the individuals per species/taxa in the trawl (Tot weight (kg)) was recorded. A total of 100 taxa (14 phyla, 28 taxonomic groups), were recorded with 30-46 taxa at each of the five stations. A total of 193 kg mega-benthos was collected with 15 to 88 kg wet weight per station. A total of 40.661 individuals were collected with 2.219 to 18.086 individuals per station. The hauls were standardized to a fixed sampling effort of one nautical mile: abundance per species/taxon as number of individuals per nautical mile and biomass per species/taxon as kg wet weight per nautical mile.
Data Records
The data in this sampling event resource has been published as a Darwin Core Archive (DwC-A), which is a standardized format for sharing biodiversity data as a set of one or more data tables. The core data table contains 199 records.
2 extension data tables also exist. An extension record supplies extra information about a core record. The number of records in each extension data table is illustrated below.
This IPT archives the data and thus serves as the data repository. The data and resource metadata are available for download in the downloads section. The versions table lists other versions of the resource that have been made publicly available and allows tracking changes made to the resource over time.
Versions
The table below shows only published versions of the resource that are publicly accessible.
How to cite
Researchers should cite this work as follows:
Jørgensen L L, Bluhm B, Descoteaux R, Åstrøm E (2024). Quantitative Invertebrate megabenthic data from the Nansen Legacy project collected in 2018 cruise JC2-1 with bottom Campelen trawl from R/V Kronprins Haakon.. Version 1.10. The Nansen Legacy Project. Samplingevent dataset. DOI: 10.21335/NMDC-2066713873
Rights
Researchers should respect the following rights statement:
The publisher and rights holder of this work is The Nansen Legacy Project. This work is licensed under a Creative Commons Attribution (CC-BY 4.0) License.
GBIF Registration
This resource has been registered with GBIF, and assigned the following GBIF UUID: dcfa7cc5-7f7d-40e6-af72-d92791aee08a. The Nansen Legacy Project publishes this resource, and is itself registered in GBIF as a data publisher endorsed by GBIF Norway.
Keywords
Occurrence; Megabenthos; trawl; invertebrates; Barents Sea; Observation
Contacts
- Originator ●
- Point Of Contact ●
- Principal Investigator
- Originator
- Originator
Geographic Coverage
Mega-benthos was sampled from the seabed by the Nansen Legacy joint cruise 1-2, on R/V Kronprins Haakon, 6-23 August 2018 (Cruise 2018707) in the northern Barents Sea.
| Bounding Coordinates | South West [76.024, 31.141], North East [80.514, 34.251] |
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Taxonomic Coverage
No Description available
| Kingdom | Chromista, Animalia |
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| Phylum | Arthropoda, Nemertea, Annelida, Chordata, Echinodermata, Mollusca, Porifera, Platyhelminthes, Ochrophyta, Bryozoa, Cnidaria |
| Class | Holothuroidea, Hydrozoa, Polychaeta, Hexacorallia, Phaeophyceae, Bivalvia, Ascidiacea, Octocorallia, Pycnogonida, Gastropoda, Demospongiae, Echinoidea, Scyphozoa, Cephalopoda, Ophiuroidea, Malacostraca, Asteroidea, Crinoidea |
| Order | Nudibranchia, Cardiida, Amphipoda, Ophiurida, Decapoda, Zoantharia, Aplousobranchia, Phlebobranchia, Coronatae, Dendrochirotida, Apodida, Carditida, Velatida, Tetractinellida, Sepiida, Valvatida, Spinulosida, Euphausiacea, Ophiacanthida, Sipuncula, Ophioscolecida, Arcida, Suberitida, Semaeostomeae, Trochida, Neogastropoda, Molpadida, Polymastiida, Cephalaspidea, Pantopoda, Phyllodocida, Forcipulatida, Malacalcyonacea, Echiuroidea, Littorinimorpha, Eunicida, Actiniaria, Axinellida, Paxillosida, Euryalida, Comatulida, Terebellida, Amphilepidida, Leptothecata, Camarodonta, Octopoda, Isopoda |
| Family | Pterasteridae, Bathypolypodidae, Arcidae, Epizoanthidae, Paguridae, Nymphonidae, Gorgonocephalidae, Thoridae, Ascidiidae, Margaritidae, Polycitoridae, Nephtheidae, Euphausiidae, Onuphidae, Chaetopteridae, Myriotrochidae, Polymastiidae, Asteriidae, Bonelliidae, Uristidae, Cyaneidae, Epimeriidae, Sepiolidae, Suberitidae, Periphyllidae, Ophiuridae, Colidae, Cardiidae, Hormathiidae, Dendronotidae, Benthopectinidae, Chaetiliidae, Buccinidae, Golfingiidae, Goniasteridae, Ophiacanthidae, Poraniidae, Stegocephalidae, Pectinariidae, Echinasteridae, Pandalidae, Ampharetidae, Antedonidae, Axinellidae, Ophioscolecidae, Psolidae, Velutinidae, Crangonidae, Polynoidae, Laodiceidae, Theneidae, Cuspidariidae, Solasteridae, Didemnidae, Ophiopyrgidae, Alcyoniidae, Astartidae, Ctenodiscidae, Terebellidae, Naticidae, Laonidae, Molpadiidae, Strongylocentrotidae, Flabelligeridae, Ophiopholidae, Astropectinidae |
Project Data
The Nansen Legacy is a novel and holistic Arctic research project providing integrated scientific knowledge on the rapidly changing marine climate and ecosystem. A new knowledge base is required to facilitate a sustainable management of the northern Barents Sea and adjacent Arctic Basin through the 21st century.
| Title | The Nansen Legacy project |
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| Identifier | AeN |
| Funding | This study was funded by the Research Council of Norway through the project The Nansen Legacy (RCN # 276730). |
| Study Area Description | Northwestern Barents Sea https://arvenetternansen.com/the-barents-sea/ |
| Design Description | Nansen Legacy goals: https://arvenetternansen.com/our-goals/ |
Sampling Methods
During this cruise, we sampled epibenthos and demersal fish at five stations with a Campelen 1800 trawl. This data set contains the epibenthos data. The trawl has a mesh size of 80 mm in the wings and 16-22 mm in the cod end and was deployed for 15 min at the seafloor at a target speed of ca. 3 kn. The target net opening is ca. 11,7 m horizontal and 4-5 m vertical.
| Study Extent | Northern Barents Sea shelf |
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Method step description:
- The trawl was deployed at ca. 1 m s-1 wire speed, and after 15 min haul at bottom it was emptied into the chute of RV Kronprins Haakon that leads to a sorting table. Species from the catches were sorted there and identified to the highest taxonomic level possible by the onboard team and supported by a photographic trawl guide compiled by L. Jørgensen based on years of Barents Sea Ecosystem Cruise surveys by the Institute of Marine Research with taxonomic expertise. All individuals were enumerated and weighed by taxon. Data are reported as count and wet weight (kg) per taxon per haul, as well as per nautical mile. Context and first results are in the cruise report (Ingvaldsen et al. 2020, https://doi.org/10.7557/nlrs.5628). Details on sampling are in the protocol book version 1 View of Sampling Protocols (https://doi.org/10.7557/nlrs.5715 ) and generally follow the Institute of Marine Research’s trawl protocol.
Additional Metadata
| Alternative Identifiers | dcfa7cc5-7f7d-40e6-af72-d92791aee08a |
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| https://ipt.gbif.no/resource?r=megabenthosjc12 |