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geoscientificInformation

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From 1 - 10 / 201
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    This file provides a list of mesopelagic species of cephalopods, decapods and teleostean fish, likely to occur in the northeastern Atlantic Ocean (central and north) and Mediterranean Sea, according to literature.

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    Analysis of fish environmental DNA (DNA traces released into the environment in form of tissue, mucus, feces, etc.) from several oceanic vertical profiles (from the surface up to 2000 m depth) along the continental slope of the Bay of Biscay. We provide the geographical location of each vertical profile, the station at which each sample belongs to, the depth, date, and hour at which each sample was collected, if the sampling was carried out during day or nighttime, and the water volume filtered. The accession numbers to the raw data of the sequenced samples (available on BioProject ID insdc:PRJNA759107) are also detailed. All samples were obtained by deploying a rosette sampler, and the surface ones were also collected using the continuous clean circuit intake of the vessel. The final operational taxonomic unit counts (OTUs) of the fish species were based on sequencing the mitochondrial 12S rRNA gene on an Illumina MiSeq platform, and taxonomic assignment to the World Register of Marine Species (WoRMS) and a local database restricted to fish species of the Northeast Atlantic and Mediterranean areas.

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    Surface and underwater solar irradiance were measured to support a nearby (within 500 m) cabled acoustic observatory (Prihartato et al. 2015, Christiansen et al. 2021, Kaartvedt et al. 2021) to study the behavior of mesopelagic fishes in Masfjorden, western Norway. Light measurements included i) registration of surface irradiance (PAR) every 15 minutes in the period from December 13, 2010 to August 17, 2011 and ii) wavelength resolved surface and underwater measurements on four selected dates in 2011.

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    Carbon export (from the epipelagic towards the mesopelagic zone) and sequestration (from the mesopelagic towards the bathypelagic zone) in the ocean are reviewed. Particulate organic carbon (POC) flux, and active flux due to migrant zooplankton and micronekton are shown from the epipelagic to the mesopelagic zone, and from the latter to the bathypelagic zone. Values towards the meso- and bathypelagic zones are compared in oligotrophic and productive systems. Zooplankton and prokaryote respiration in the meso- and bathypelagic zones of the ocean are also reviewed for oligotrophic and productive systems. Values were integrated over a depth layer and are given as the flux or respiration under one square meter (in g/m**2/a) between e.g. 100 m and 1000 m depth.

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    The present data were collected from two cruises that took place in the Canary Current from September 10 to October 1, 2002 (COCA I) and from May 21 to June 7, 2003 (COCA II). The study was conducted along two zonal sections (21ºN and 26ºN) extending from the coastal upwelling to the open ocean at 26ºW, and focused on the epipelagic (0-200 m) and mesopelagic (200-1000 m) zones. The cruises consisted of a total of 31 hydrographic stations and 10 biogeochemical stations, half of them along each section, which were roughly equidistant. At each hydrographic station, conductivity, temperature and pressure were recorded by means of a Seabird 911+ CTD, mounted on a General Oceanics rosette sampler equipped with 24 10L-Niskin bottles.

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    The present data were collected from two cruises that took place in the Canary Current from September 10 to October 1, 2002 (COCA I) and from May 21 to June 7, 2003 (COCA II). The study was conducted along two zonal sections (21ºN and 26ºN) extending from the coastal upwelling to the open ocean at 26ºW, and focused on the epipelagic (0-200 m) and mesopelagic (200-1000 m) zones. The cruises consisted of a total of 31 hydrographic stations and 10 biogeochemical stations, half of them along each section, which were roughly equidistant. At each station seawater samples were collected at fixed depths in the biogeochemical stations every 50 m for suspended POC, DOC and ETS activity by means of a Seabird 911+ CTD, mounted on a General Oceanics rosette sampler equipped with 24 10L-Niskin bottles.

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    During three cruises in the Mid Atlantic Ridge area in 2016 and 2017, we studied Maurolicus muelleri (Mueller's pearlside) wet mass, length, sex and maturity stages per size class.

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    As a proxy for zooplankton and micronekton biomass in the water column, acoustic backscatter intensity (dB), acquired using a Lowered Acoustic Doppler Current Profiler (LADCP) down to ca. 4000 m depth along the Malaspina Expedition (CSD2008-00077). Datasets are from 7 different legs around the World (1-7): 1 Spain-Brazil, 2 Brazil-South Africa, 3 South Africa-West Australia, 4 West Australia-East Australia, 5 East Australia-Hawaii, 6 Hawaii-Panamá, 7 Panamá-Spain.