Ólafsdóttir, Anna H; Pampoulie, Christophe: Fish and invertebrate trawl sampling south and west of Iceland in July 2018 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.915969 (dataset in review)
Abstract:
This data set has trawl catch weight and biological measurements from the 2nd leg of the Icelandic part of the International Ecosystem Summer Survey in Nordic Seas (IESSNS). The survey area was from the coast, over the shelf edge and into the deep-water basins south and west of Iceland, defined as IESSNS strata 5, 6, and 12, and stratum boundaries (black solid line) are displayed on attached map "IESSNS 2018.png". The survey period is July 19th to August 1st, 2018, and samples were collected at 34 trawl stations (blue symbol on attached map "IESSNS 2018.png"). A specifically designed scientific trawl, called Multpelt832 (ICES 2013a-b, Valdemarsen et al. 2014) with cod-end mesh size of 50 mm, was used at all 34 stations. Trawl depth ranged from surface (trawl headline in surface) to 400 m depth. All trawl catch is identified to lowest possible taxonomic level, total weight of each species recorded and length of 20-50 specimen per species measured. For blue whiting (Micromesistius poutassou), herring (Clupea harengus), and mackerel (Scomber scombrus) more biological measurements are provided such as weight, sex, maturity, age, liver weight and stomach weight. Each specimen is one row in the data set file. Natantia and Scyphozoa specimen could not be identified to species, hence no individual length measurements are provided but total weight of catch per taxon is provided. For detailed information about the survey see the survey report (Ólafsdóttir and Jónsson 2019). Various information is provided about the trawling operation, weather, position, date and time.
Keyword(s):
Related to:
Ólafsdóttir, Anna H; Pampoulie, Christophe: Fish and invertebrate trawl sampling south and west of Iceland in July 2019. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.918336
Ólafsdóttir, Anna H; Pampoulie, Christophe: Fish and invertebrate trawl sampling south of Iceland and in southern Irminger Sea in July 2020. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.930437
References:
International Council for the Exploration of the Sea (ICES) (2013): Report of the Working Group on Improving Use of Survey Data for Assessment and Advice (WGISDAA). Marine Institute, Dublin, Ireland. ICES CM 2013/SSGESST:07, 22 pp.
International Council for the Exploration of the Sea (ICES) (2013): Report of the Workshop on Northeast Atlantic Mackerel monitoring and methodologies including science and industry involvement (WKNAMMM). ICES Headquarters, Copenhagen and Hirtshals, Denmark. ICES CM 2013/SSGESST:18, 33 pp.
Ólafsdóttir, Anna H; Jónsson, Sigurdur Thor (2019): Results of the Icelandic part of the International Ecosystem Summer Survey in Nordic Seas (IESSNS) in 2018 on R/V Árni Friðriksson. HV 2019-21. Marine and Freshwater Research Institute, Iceland, 32 pp., hv2019-21.pdf
Valdemarsen, J W; Jacobsen, J A; Óskarsson, Guomundur J; Utne, Kjell Rong; Einarsson, H A; Sveinbjörnsson, Sveinn; Smith, L; Zachariassen, K; Nøttestad, Leif (2014): Swept area estimation of the North East Atlantic mackerel stock using a standardized surface trawling technique. Working Document (WD) to ICES WKPELA, 14 pp.
Further details:
Project(s):
Funding:
Coverage:
Median Latitude: 63.333443 * Median Longitude: -22.219261 * South-bound Latitude: 61.205833 * West-bound Longitude: -31.233000 * North-bound Latitude: 64.992500 * East-bound Longitude: -14.994833
Date/Time Start: 2018-07-19T03:36:00 * Date/Time End: 2018-08-01T12:17:00
Minimum DEPTH, water: 15.0 m * Maximum DEPTH, water: 360.0 m
Event(s):
A9-2018_343 * Latitude Start: 61.205833 * Longitude Start: -16.824500 * Latitude End: 61.215833 * Longitude End: -16.885833 * Date/Time Start: 2018-07-19T03:36:00 * Date/Time End: 2018-07-19T04:06:00 * Elevation Start: -2400.0 m * Elevation End: -2400.0 m * Mesh size: 50 mm * Location: Nordic Seas * Campaign: IESSNS_2018 (A9-2018) * Basis: Arni Fridriksson * Method/Device: Multipurpose pelagic trawl - 832 (MULTPELT-832)
A9-2018_344 * Latitude Start: 61.207167 * Longitude Start: -19.177167 * Latitude End: 61.235000 * Longitude End: -19.241000 * Date/Time Start: 2018-07-19T11:45:00 * Date/Time End: 2018-07-19T12:15:00 * Elevation: -2371.0 m * Mesh size: 50 mm * Location: Nordic Seas * Campaign: IESSNS_2018 (A9-2018) * Basis: Arni Fridriksson * Method/Device: Multipurpose pelagic trawl - 832 (MULTPELT-832)
A9-2018_345 * Latitude Start: 61.229667 * Longitude Start: -21.198500 * Latitude End: 61.224333 * Longitude End: -21.057667 * Date/Time Start: 2018-07-19T18:33:00 * Date/Time End: 2018-07-19T19:33:00 * Elevation Start: -2000.0 m * Elevation End: -2000.0 m * Mesh size: 50 mm * Location: Nordic Seas * Campaign: IESSNS_2018 (A9-2018) * Basis: Arni Fridriksson * Method/Device: Multipurpose pelagic trawl - 832 (MULTPELT-832)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Ólafsdóttir, Anna H | |||
| 2 | Country | Country | Ólafsdóttir, Anna H | |||
| 3 | Year of observation | Year obs | a AD | Ólafsdóttir, Anna H | ||
| 4 | Station label | Station | Ólafsdóttir, Anna H | |||
| 5 | Comment | Comment | Ólafsdóttir, Anna H | Trawl station type (Ptrawl = surface, DeepTrawl = watercolumn) | ||
| 6 | DATE/TIME | Date/Time | Ólafsdóttir, Anna H | Geocode – Trawl in water | ||
| 7 | DATE/TIME | Date/Time | Ólafsdóttir, Anna H | Geocode – Trawl out of water | ||
| 8 | LATITUDE | Latitude | Ólafsdóttir, Anna H | Geocode – Trawl in water | ||
| 9 | LONGITUDE | Longitude | Ólafsdóttir, Anna H | Geocode – Trawl in water | ||
| 10 | Latitude 2 | Latitude 2 | Ólafsdóttir, Anna H | Trawl out of water | ||
| 11 | Longitude 2 | Longitude 2 | Ólafsdóttir, Anna H | Trawl out of water | ||
| 12 | Depth, bathymetric | Bathy depth | m | Ólafsdóttir, Anna H | Trawl in water | |
| 13 | Depth, bathymetric | Bathy depth | m | Ólafsdóttir, Anna H | Trawl out of water | |
| 14 | Towing speed | Towing speed | kn | Ólafsdóttir, Anna H | At tow depth | |
| 15 | Trawling time | Trawl t | min | Ólafsdóttir, Anna H | At tow depth | |
| 16 | Trawling distance | Trawling dis | nmi | Ólafsdóttir, Anna H | At tow depth | |
| 17 | Trawl vertical opening | Trawl v open | m | Ólafsdóttir, Anna H | At tow depth | |
| 18 | Trawl door horizontal opening | Trawl door h open | m | Ólafsdóttir, Anna H | At tow depth | |
| 19 | Trawl headline depth | Trawl headline depth | m | Ólafsdóttir, Anna H | Tow begins | |
| 20 | Trawl headline depth | Trawl headline depth | m | Ólafsdóttir, Anna H | Tow ends | |
| 21 | DEPTH, water | Depth water | m | Ólafsdóttir, Anna H | Calculated average/mean values | Geocode |
| 22 | Code | Code | Ólafsdóttir, Anna H | Fishing gear type (MFRI code) | ||
| 23 | Mesh size | Mesh size | mm | Ólafsdóttir, Anna H | Codend meshsize | |
| 24 | Sweeps length | Sweeps l | m | Ólafsdóttir, Anna H | ||
| 25 | Wire length | Wire length | m | Ólafsdóttir, Anna H | Wrap wire length | |
| 26 | Wind speed | ff | m/s | Ólafsdóttir, Anna H | ||
| 27 | Wind direction | dd | deg | Ólafsdóttir, Anna H | ||
| 28 | Cloud cover | Cloud cov | okta | Ólafsdóttir, Anna H | Scale 1 - 8 | |
| 29 | Temperature, water | Temp | °C | Ólafsdóttir, Anna H | At 5 m depth from surface | |
| 30 | Temperature, air | TTT | °C | Ólafsdóttir, Anna H | At sea level | |
| 31 | Pressure, atmospheric | PPPP | hPa | Ólafsdóttir, Anna H | ||
| 32 | Taxon/taxa, unique identification | Taxa UID | Ólafsdóttir, Anna H | Visual identification (VID) | ||
| 33 | Taxon/taxa, unique identification (Semantic URI) | Taxa UID (Semantic URI) | Ólafsdóttir, Anna H | Visual identification (VID) | ||
| 34 | Taxon/taxa, unique identification (URI) | Taxa UID (URI) | Ólafsdóttir, Anna H | Visual identification (VID) | ||
| 35 | Length | l | cm | Ólafsdóttir, Anna H | Fish measuring board | |
| 36 | Weight, total, wet | w tot wet | g | Ólafsdóttir, Anna H | Fish, wet weighted | |
| 37 | Sex | Sex | Ólafsdóttir, Anna H | Visual identification (VID) | ||
| 38 | Gonadal stage | Gon stg | Ólafsdóttir, Anna H | Visual identification (VID) | ||
| 39 | Liver, wet mass | Liver wm | g | Ólafsdóttir, Anna H | Weighted | |
| 40 | Stomach, wet mass | Stom wm | g | Ólafsdóttir, Anna H | Weighted | |
| 41 | Age | Age | a | Ólafsdóttir, Anna H | Otolith reader | Age of fish in years |
| 42 | Mass | Mass | kg | Ólafsdóttir, Anna H | Weighted | Total weight per species per station |
| 43 | Number of individuals | Ind No | # | Ólafsdóttir, Anna H | Counting, visual | Specimen length measured per species per station |
| 44 | Number of individuals | Ind No | # | Ólafsdóttir, Anna H | Counting, visual | Specimen aged per species per station |
| 45 | Number of individuals | Ind No | # | Ólafsdóttir, Anna H | Counting, visual | Specimen weighted per species per station |
| 46 | Identification | ID | Ólafsdóttir, Anna H | Sample identification number (MFRI database) |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC) * Processing Level: PANGAEA data processing level 3 (ProcLevel3)
Size:
113464 data points
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