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  • Translated from Anton Dohrn biotope maps showing all Annex I and non-Annex I habitats. Translated to EUNIS by JNCC. Data collected aboard the MV Franklin in July 2009: Acoustics (Multibeam echosounder), Drop camera/towed video (10 sites). The original survey plan (Stewart 2009) for the Anton Dohrn Seamount AoS involved a combination of radial transects on the top of Anton Dohrn and a suite of transects parallel to the flanks of the seamount both at the top of the flank and a level near the base the flank tohighlight the lower level of possible rock or hard substrate. The survey plan was subsequently modified to provide an area of multibeam coverage over two areas on the flanks of the seamount. The areas selected were on the south-eastern flank and the northwestern flank (Figure 5) and included diverse morphological features noted during the SEA 7 2005 survey (Jacobs 2006). The areas would provide a contrast between the south-eastern area primarily subject to ‘southern’ water masses and the north-western area occasionally influenced by ‘colder’ NSDW waters spilling over the Wyville Thomson Ridge. The two case study areas also differ in the height of the cliff surrounding the seamount. In the northwestern area the break in slope is at around 845m below sea level with the cliff descending to the moat at around 2195m depth, the slope levels off below 1700m at the foot of the cliff. The south-eastern area shows a subtle break in slope at around 875m below sea level and a major break in slope at around 1100m below sea level before the cliff descends towards the centre of the moat at around 2300m water depth. The range of morphological features observed on the lower slopes of also differed.

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    Catch data for macroplankon/micronekton trawls from IMR cruise 2016115, covering areas in the eastern Norwegian Sea, October 2016. The dataset contains trawl data from hauls dedicated to catching macroplankton and micronekton, using specialised, fine-meshed, non-graded trawls. All data presented are from oblique hauls, and is given as total catch biomass for all taxonomic groups (at different taxonomic resolutions, with some species identified and some organisms only identified to coarser taxonomic levels) in the catch, on a format compatible with the ICES trawl-acoustic database.

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    Catch data for macroplankon/micronekton trawls from IMR cruise 2018106, covering areas in the Northeast Atlantic, June 2018. The dataset contains trawl data from hauls dedicated to catching macroplankton and micronekton, using specialised, fine-meshed, non-graded trawls. All data presented are from oblique hauls, and is given as total catch biomass for all taxonomic groups (at different taxonomic resolutions, with some species identified and some organisms only identified to coarser taxonomic levels) in the catch, on a format compatible with the ICES trawl-acoustic database.

  • Translated from East Rockall habitat map showing all Annex I and non-Annex I habitats. Translated to EUNIS by JNCC. Data collected in 2009 aboard the MV Franklin in July 2009: Acoustics (Multibeam echosounder), Sidescan Sonar, Drop camera/towed video (17 sites). For the East Rockall Bank AoS the original survey plan consisted primarily of a series of traverses along the top and base of the eastern flank of Rockall Bank and several traverses at right angles across the top of the bank and down into the Rockall Trough. However to maximise the coverage along the rocky escarpment that runs along the length of the AoS, this initial plan was replaced with a long double swath width of multibeam echosounder data acquired along the escarpment; the upper break in slope, roughly coincident with the 500m bathymetric contour, as imaged previously by the SEA 7 2005 multibeam echosounder datasets. From previous studies (including FRS drop camera surveys), this area was selected as being the most likely place to host Annex I reef habitats, in particular as potential sites for Lophelia pertusa. A number of survey lines at right angles to the break in slope were added to the along-escarpment line to better characterise features of interest observed on the 2005 multibeam echosounder dataset downslope of the escarpment. Additionally several survey lines were located on the top of the bank, across an area of suspected iceberg ploughmarks.

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    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) conducted in July 2019. 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 2019.png". The survey period is July 16 - 28 2019, and samples were collected at 34 trawl stations (blue symbol on attached map). 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 370 m depth. All trawl catch was 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) more biological measurements are provided such as weight, sex, maturity, age, and stomach weight. For age determination, the otolith was extracted whole from the blue whiting at sea and read whole under a dissecting microscope on land by an experienced age reader part of the ICES framework. Gonad maturity stage was visually estimated at sea during sampling by an experienced technician. The maturity stages are 1-7, where 1 is immature, 2 is beginning to mature or beginning to recovering from previous spawning event, 3 is maturing, 4 is maturing, 5 is getting fully mature, 6 is spawning, and 7 has finished spawning. In total, measurements are provided for 857 specimen. Each specimen is one row in the dataset file. Ten specimen, at eight stations (352, 354, 361, 366, 375, 383, 388, 391) were not length measured but are included and total weight of catch per taxon or species per station is provided. Information for three pelagic fish species is excluded from the data set and these species are mackerel (Scomber scombrus), herring (Clupea harengus) and lump fish (Cyclopterus lumpus). For detailed information about the survey, see the survey report (in English): https://www.hafogvatn.is/is/midlun/utgafa/haf-og-vatnarannsoknir/results-of-the-icelandic-part-of-the-international-ecosystem-summer-survey-in-nordic-seas-iessns-in-2019-on-rv-arni-fridriksson-hv-2019-57. Various information is provided about the trawling operation, weather, position, date and time. The data are provided by the Marine and Freshwater Research Institute (MFRI) in Reykjavik, Iceland.

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    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) conducted in July 2020. The survey area was from the coast, over the shelf edge and into the deep-water basins south of Iceland and in the southern part of the Irminger Sea, defined as IESSNS strata 6, 11 and 12, see embedded map. The survey period was July 11 – 30, 2020, and samples were collected at 27 trawl stations. 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 27 stations. Trawl depth ranged from surface (trawl headline in surface) to 550 m depth. All trawl catch was identified to lowest possible taxonomic level, total weight of each species recorded, and length and weight of 50 specimen per species measured, or all if less was caught. For blue whiting (Micromesistius poutassou) more biological measurements are provided such as sex, maturity, age, and stomach weight. For age determination, the otolith was extracted whole from the blue whiting at sea and read whole under a dissecting microscope on land by an experienced age reader part of the ICES framework. Gonad maturity stage was visually estimated at sea during sampling by an experienced technician. The maturity stages are 1-7, where 1 is immature, 2 is beginning to mature or beginning to recovering from previous spawning event, 3 is maturing, 4 is maturing, 5 is getting fully mature, 6 is spawning, and 7 has finished spawning. For the taxa Scyphozoa and Natantia decapods only total catch weight per station is recorded. In total, length measurements are provided for 1383 specimens and weight for 1231 specimen. Each specimen is one row in the dataset file. Information for three pelagic fish species is excluded from the data set and these species are mackerel (Scomber scombrus), herring (Clupea harengus) and lump fish (Cyclopterus lumpus). For detailed information about the survey see the survey report (in English): https://www.hafogvatn.is/is/midlun/utgafa/haf-og-vatnarannsoknir/results-of-the-icelandic-part-of-the-international-ecosystem-summer-survey-in-nordic-seas-iessns-in-2020-on-rv-arni-fridriksson Various information is provided about the trawling operation and weather. The data is provided by the Marine and Freshwater Research Institute (MFRI) in Iceland.

  • ICES database of processed acoustic and biotic data from national and international acoustic surveys

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    The dataset contains integrated values of total and mesopelagic backscatter for an EK60 38 kHz echosounder, from ~25 to 1000 m depth, collected during October 2016 during a Norwegian cruise aimed at mapping mesopelagic resources. Data is based on integration of data cleaned with automatic filters using KORONA, and manual cleanup of remaining problems (false bottoms etc.). All backscatter deeper than 200 m were then assigned to the mesopelagic category, with backscatter shallower than 200 m reported in the total category.

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    The dataset contains integrated values of total and mesopelagic backscatter for an EK60 38 kHz echosounder, from ~25 to 1000 m depth, collected during June 2018 during a Norwegian cruise aimed at mapping mesopelagic resources. Data is based on integration of data cleaned with automatic filters using KORONA, and manual cleanup of remaining problems (false bottoms etc.). All backscatter deeper than 200 m were then assigned to the mesopelagic category, with backscatter shallower than 200 m reported in the total category.

  • The aim of the survey was to map the seabed environment around North Rona. The survey will form the baseline for future management of the area to determine the scope and nature of any “appropriate assessment”. The survey area encompasses the seabed all around North Rona. In order to record and characterise the habitats around North Rona, Seastar Survey Ltd. undertook an acoustic and a ground-truthing survey (video/still photography survey) in 2009. The aim of the acoustic element of the survey was to identify different backscatter returns and describe as well as delineate the extent of the various seabed habitat types occurring around North Rona. A digital sidescan sonar mosaic, in conjunction with single beam echo sounder derived bathymetry, provided the initial broadview to map the substrata present throughout the survey area as well as allowing the identification of any features of interest. The aim of the ground-truthing element of the survey was to provide a description of the richness and diversity of the habitats on both rocky reef and the softer sediments. The biotope distribution and species composition was developed through interpretation of drop-down video footage and digital still photography, taken after evaluation of the sidescan mosaic. The results of all elements of the survey were used to create a Geographical Information System (GIS) which enabled a high level of processing, interpretation and display of the sidescan sonar mosaic, bathymetry, substrata types, biotopes and the digital photography.