Seafloor litter - Fishing related items density normalized per km² 2011/2021 v2021 |
sl_fishing |
Short description |
This visualization product displays fishing related items density per trawl.
EMODnet Chemistry included the collection of marine litter in its 3rd phase. Since the beginning of 2018, data of seafloor litter collected by international fish-trawl surveys have been gathered and processed in the EMODnet Chemistry Marine Litter Database (MLDB).
The harmonization of all the data has been the most challenging task considering the heterogeneity of the data sources, sampling protocols (OSPAR and MEDITS protocols) and reference lists used on a European scale. Moreover, within the same protocol, different gear types are deployed during fishing bottom trawl surveys.
In cases where the wingspread and/or the number of items were unknown, data could not be used because these fields are needed to calculate the density. Data collected before 2011 are affected by this filter.
When the distance reported in the data was null, it was calculated from:
- the ground speed and the haul duration using this formula: Distance (km) = Haul duration (h) * Ground speed (km/h);
- the trawl coordinates if the ground speed and the haul duration were not filled in.
The swept area is calculated from the wingspread (which depends on the fishing gear type) and the distance trawled:
Swept area (km²) = Distance (km) * Wingspread (km)
Densities have been calculated on each trawl using the following computation:
Density of fishing related items (number of items per km²) = ∑Number of fishing related items / Swept area (km²)
Percentiles 50, 75, 95 & 99 have been calculated taking into account data for all years.
The list of selected items for this product is attached to this metadata.
Information on data processing and calculation is detailed in the attached methodology document.
Warning: the absence of data on the map doesn't necessarily mean that they don't exist, but that no information has been entered in the Marine Litter Database for this area. |
Point of contact |
EMODnet Chemistry sextant@ifremer.fr |
Resource constraints |
CC BY 4.0: https://creativecommons.org/licenses/by/4.0/ |
Spatial extent |
['-15.837', '30.56527', '36.0013', '61.7136'] |
Type |
series |
Metadata information |
Identifier | e410bd8c-ad38-482b-8a76-d867a40746fc (metadata download) |
Keywords |
/Human Activities/Pollution
;
Thèmes Sextant
;
Oceanographic geographical features ; Litter abundance and type ; Sea-floor litter abundance ; Arctic Ocean ; Mediterranean Sea ; Black Sea ; Baltic Sea ; North Sea ; Northeast Atlantic Ocean (40W) ; EMODnet Chemistry ; sediment ; Marine litter ; Data ; Mission Atlantic - Resources ; Celtic Seas ; Mission Atlantic - Case Studies ; WP4 Benthic Mapping ; Mission Atlantic - Work Package ; /Environment/Pollution ; Mission Atlantic - BODC Parameters ; Spatial data products ; Mission Atlantic - Data type (DMP) ; Metadata GDI-Vl-conform ; |
Resource provider(s) |
IFREMER / IDM / SISMER - Scientific Information Systems for the SEA +33 (0)2 98.22.49.16 +33 (0)2 98.22.46.44 http://www.ifremer.fr/sismer/ web site information sismer@ifremer.fr Ifremer / VIGIES (Information Valuation Service for Integrated Management and Monitoring) +33 (02 40.37.40.00 +33 (0)2 40.37.40.01 https://wwz.ifremer.fr/Recherche-Technologie/Departements-scientifiques/Departement-Oceanographie-et-Dynamique-des-Ecosystemes/VIGIES web site information morgan.le.moigne@ifremer.fr National Institute of Oceanography and Applied Geophysics - OGS, Division of Oceanography http://www.ogs.trieste.it/ web site information nodc@ogs.trieste.it Ifremer, VIGIES (Information Valuation Service for Integrated Management and Monitoring) +33 (02 40.37.40.00 +33 (0)2 40.37.40.01 https://wwz.ifremer.fr/Recherche/Departements-scientifiques/Departement-Oceanographie-et-Dynamique-des-Ecosystemes/VIGIES web site information morgan.le.moigne@ifremer.fr IFREMER, SISMER, Scientific Information Systems for the SEA +33 (0)2 98.22.49.16 +33 (0)2 98.22.46.44 http://data.ifremer.fr/SISMER web site information sismer@ifremer.fr ARPA Emilia-Romagna, Struttura Oceanografica Daphne http://www.arpa.emr.it/Daphne/index.asp web site information Atlantic Scientific Research Institute for Marine Fishery and Oceanography 8 (0112) 21-56-45 8 (0112) 21-99-97 http://atlantniro.ru/ web site information atlant@baltnet.ru Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory +44 (0)1502 562244 http://www.cefas.co.uk/ web site information datamanager@cefas.co.uk DTU Aqua, National Institute of Aquatic Resources, Technical University of Denmark + 45 35 88 33 00 https://www.aqua.dtu.dk/English web site information aqua@aqua.dtu.dk IFREMER, STATION DE LORIENT +33 (0)2 97 87 38 00 +33 (0)2 97 87 38 01 web site information secretariat@ifremer.fr Estonian Marine Institute +372 6 718 901 +372 6 718 900 http://www.sea.ee web site information meri@sea.ee Hellenic Centre for Marine Research, Institute of Oceanography (HCMR/IO) +30-22910-76452. -76460 +30-22910-76347 https://www.hcmr.gr/ web site information iosecretariat@hcmr.gr IEO, Santander Oceanographic Centre +34 942 291 716 +34 942 275 072 http://www.ieo.es/santander web site information ieosantander@ieo.es IFREMER, CENTRE MANCHE, MER DU NORD +33 (0)3 21.99.56.00 +33 (0)3 21.99.56.01 https://wwz.ifremer.fr/manchemerdunord/Environnement/LER-Boulogne-sur-Mer web site information IFREMER, Fisheries English Channel North sea, Boulogne-sur-mer +33 (0)3 21 99 56 00 +33 (0)3 21 99 56 01 https://wwz.ifremer.fr/manchemerdunord/ web site information IFREMER, STATION DE SETE +33(0)4 99 57 32 00 +33 (0)4 99 57 32 94 https://wwz.ifremer.fr/mediterranee/implantations/Sete web site information Institute for Agricultural and Fisheries Research, Animal Sciences Unit, Fisheries +32 59 34 22 50 +32 59 33 06 29 http://www.ilvo.vlaanderen.be/ web site information DierVI@ilvo.vlaanderen.be Institute for Water of the Republic of Slovenia +386(0)14775300 http://www.izvrs.si/?lang=en web site information info@izvrs.si Institute of Food Safety, Animal Health and Environment +371 67620513 +371 67620434 http://www.bior.gov.lv/en web site information bior@bior.gov.lv Institute of Marine Biology (IMBK) +382 32 33 45 70 +382 32 33 45 70 https://www.ucg.ac.me/ibm/ web site information danijela.j@ucg.ac.me Institute of Marine Research +47 55 23 85 00 +47 55 23 85 31 http://www.imr.no web site information post@imr.no Institute of Oceanography and Fisheries +385 21 408000/8011 +385 21 358650 web site information office@izor.hr ISPRA, Italian National Institute for Environmental Protection and Research, Chioggia Marine Institute +353-91-387200 +353-91-387201 http://www.marine.ie web site information datarequests@marine.ie Marine Scotland Science +44 (0)1224 876544 +44 (0)1224 295511 web site information inapplicable Ministry of Agriculture, Fisheries Service +370 46 310660 http://zuv.lt/ web site information info@zuv.lt National Institute for Marine Research and Development "Grigore Antipa" 40 241 543288 40 241 831274 http://www.rmri.ro web site information office@alpha.rmri.ro National Marine Fisheries Research Institute +48 587-356-232 http://www.nmfri.gdynia.pl web site information sekretariat@mir.gdynia.pl Non-governmental environmental organization "Mare Nostrum" +40 241 612422 https://www.marenostrum.ro/ web site information office@marenostrum.ro Portuguese Institute for Sea and Atmosphere, I.P. (IPMA, I.P.) Swedish University of Agricultural Sciences +46-(0)18-67 10 00 +46-(0)18-67 20 00 https://www.slu.se/ web site information registrator@slu.se Thünen-Institute of Baltic Sea Fisheries (TI-OF) +49-381 811 61-00 +49-381 811 61-99 web site information of@ti.bund.de Wageningen Marine Research, IJmuiden +31 317480900 https://www.wur.nl/nl/Onderzoek-Resultaten/Onderzoeksinstituten/marine-research.htm web site information |
Lineage |
The data used as input for this product have been extracted from the EMODnet Chemistry Download Service: https://emodnet-chemistry.maris.nl/search |