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Institute of Marine Research

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    Dataset collating kelp occurrences (presences and absences) from surveys conducted across the Azores archipelago (NE Atlantic) using remotely operated vehicles, drop-down cameras, open and closed-circuit SCUBA diving, and fisheries by-catch information.

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    Data collected with a 2m beamtrawl towed about 200-300m. Dataset contains numbers and combined wet weight of specimen (down to 1 mg) within same species or higher taxonomic unit. Samples are preserved on formalin and then alcohol. After id the material is stored at the Bergen Museum, Bergen, Norway.

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    Dataset contains species name, their number of specimen and wet-weight for each taxa (0,1 mg). Samples were originally preserved in formaline and later converted to ethanol. After identification samples are stored at Bergen Museum/University of Bergen.

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    The survey data consist of: 1) one time series from 1984-2002 (October/November) using R/V Michael Sars and the Campelen-trawl; 2) a point estimate for 2003 (October) as R/V Michael Sars was taken out of service and substituted with R/V Håkon Mosby, whose winches at that time were not powerful enough for the Campelen-trawl, resulting in the survey being conducted with the Shrimp trawl 1420; 3) a start of a potential new time series as the survey in both 2004 and 2005 was conducted in May/June with R/V Håkon Mosby using the standard Campelen trawl; and 4) one time series from 2006 until present (January/February), using R/V Håkon Mosby and the Campelen trawl. From 2017 R/V Håkon Mosby has been substituted with R/V Kristine Bonnevie. In 2016, there were technical problems with the survey trawl (unequal wire lengths of the trawl gear) and this year’s data are considered to be non-representative of the stock status.

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    The dataset contains observations of fish collected by IMR in the Barents Sea, Norwegian Sea and North Sea, 2007-2017.

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    The MARBUNN database contains benthos from the seabed in Norwegian coastal and offshore areas covered by the MAREANO project (www.mareano.no).

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    Hyperbenthic decanted crustacea collected with Rothlisberg-Piercy sledge, hauls 5-10 min bottomtime. All samples after 2012 are preserved on board in ethanol. Taxa identified as detailed as possible. Specimens kept at Bergen Museum, Bergen, Norway.

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    Abundance and distribution of capelin larvae were investigated using a Gulf III plankton sampler on surveys conducted in May-June in the southern Barents Sea. The time series started in 1981 and lasted until 2006, when the survey series was discontinued.

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    The IMR zooplankton database holds North Sea data on species composition (abundance), size fractionated biomass as well as biomass for particular zooplankton groups obtained from standard seasonal transects (Utsira-StartPoint, Feie-Shetland, Hanstholm-Aberdeen, Torungen-Hirtshals) and a regional coverage of the northern North Sea and Skagerrak during April-May. Data on species composition are limited.

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    The Macroplankton dataset in the IMR plankton database contains macroplankton from the Norwegian and Barents Seas. The dataset includes small vertically migratory fish.