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  • 1
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    Counts and mass of fish species from trawl samples in the western Weddell Sea during POLARSTERN cruise ANT-XXIII/8 (2012)
    PANGAEA
    Details
    Publication Date: 2023-02-12
    Keywords: ANT-XXIII/8; Area; Bathydraco antarcticus; Bathydraco antarcticus, biomass, wet mass; Bathydraco antarcticus, wet mass; Bottom trawl; BT; Chaenodraco wilsoni; Chaenodraco wilsoni, biomass, wet mass; Chaenodraco wilsoni, wet mass; Chionodraco myersi; Chionodraco myersi, biomass, wet mass; Chionodraco myersi, wet mass; Dacodraco hunteri; Dacodraco hunteri, biomass, wet mass; Dacodraco hunteri, wet mass; Date/Time of event; Date/Time of event 2; Depth, bottom/max; Depth, top/min; DEPTH, water; Device type; Elevation of event; Elevation of event 2; Event label; Fish; Fish, biomass, wet mass; Fish, wet mass; Gobionotothen gibberifrons; Gobionotothen gibberifrons, biomass, wet mass; Gobionotothen gibberifrons, wet mass; Gymnodraco acuticeps; Gymnodraco acuticeps, biomass, wet mass; Gymnodraco acuticeps, wet mass; Latitude of event; Latitude of event 2; Lepidonotothen larseni; Lepidonotothen larseni, biomass, wet mass; Lepidonotothen larseni, wet mass; Longitude of event; Longitude of event 2; Neopagetopsis ionah; Neopagetopsis ionah, biomass, wet mass; Neopagetopsis ionah, wet mass; Net, width; Pagothenia borchgrevinki; Pagothenia borchgrevinki, biomass, wet mass; Pagothenia borchgrevinki, wet mass; Pleuragramma antarcticum; Pleuragramma antarcticum, biomass, wet mass; Pleuragramma antarcticum, wet mass; Polarstern; PS69; PS69/700-2; PS69/703-2; PS69/710-6; PS69/715-1; Speed; Trawling distance; Trawling time; Trematomus bernacchii; Trematomus bernacchii, biomass, wet mass; Trematomus bernacchii, wet mass; Trematomus eulepidotus; Trematomus eulepidotus, biomass, wet mass; Trematomus eulepidotus, wet mass; Trematomus hansoni; Trematomus hansoni, biomass, wet mass; Trematomus hansoni, wet mass; Trematomus loennbergii; Trematomus loennbergii, biomass, wet mass; Trematomus loennbergii, wet mass; Trematomus pennellii; Trematomus pennellii, biomass, wet mass; Trematomus pennellii, wet mass; Trematomus scotti; Trematomus scotti, biomass, wet mass; Trematomus scotti, wet mass; Weddell Sea
    Type: Dataset
    Format: text/tab-separated-values, 300 data points
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    DATA PANGAEA
  • 2
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    Biochemical components and energy content of the pelagic tunicate Salpa thompsoni measured across the Southern Ocean and forty years (1980–2020) (2024)
    PANGAEA
    Details
    Publication Date: 2024-04-23
    Description: The pelagic tunicate Salpa thompsoni is a widespread cold-water metazoan and a major grazer of phyto- and microzooplankton in the Southern Ocean. Long-term time series and spatiotemporal models predict that salps will expand their distribution towards higher latitudes over the next decades with ramifications for all food web components, including higher tropic level predators. Salps are potentially less nutritious and energy-rich than co-occurring euphausiids. In a changing Southern Ocean ecosystem, predators such as baleen whales, seabirds, and planktivorous fish that historically relied on an energy-rich and numerous food source (euphausiids) may face an uncertain future. This, however, may differ by season too. Whether S. thompsoni are a less nutritious prey item than euphausiids across an annual cycle at circumpolar mid and high latitudes (51–70°S) has not been investigated. We utilised published and new body composition data, i.e., organic content (ash-free dry weight as percent of dry weight, DW), carbon content (carbon weight as percent of DW), and proximate biochemical composition (carbohydrate, lipid, and protein weight as percent of DW), collected over the past forty years (1980–2020). Energy content values were calculated based on these parameters using published conversion factors. We corrected for residual water (water remaining in tissue after drying) with a published conversion factor of 12.9 %. Samples (N = 303, sometimes comprising of several salps) were collected in four seasons using a variety of large plankton nets and midwater trawls between the surface and 3200 m (mostly less than 400 m). Each specimen was sized (oral-atrial or total length) and staged (blastozooid, oozooid). The carbon-to-nitrogen ratio (C/N value) was reported for most (77 %) of the samples. Samples were used for the determination of sometimes one or several body composition parameters: organic content (N = 151), carbon content (N = 220), and proximate biochemical composition (N = 70). The weight-specific energy content ranged between 〈 0.1 and 20.5 kJ g DW⁻¹.
    Keywords: According to source references; ANT-XIII/4; ANT-XVIII/5b; ANT-XXI/4; ANT-XXIII/2; ANT-XXIII/6; ANT-XXXIII/3; BONGO; Bongo net; Container, mass; Cruise/expedition; DATE/TIME; DEPTH, water; Drake Passage; Energy content estimation according to Båmstedt (1981); Energy content estimation according to Doyle et al. (2007); Energy content estimation according to Platt et al. (1969); Event label; Gear; Hand net; HN; IKMT; invertebrate macro-grazer; Isaac-Kid-Midwater Trawl; KYM_1980_net; KYM_2000_net; LATITUDE; LONGITUDE; Mass; Midwater trawl; Month; MPD_1984_net; MPD_1986_net; MPD_1988_net; MSM-ANT-III_465; MSN; MULT; Multiple investigations; Multiple opening/closing net; MWT; NDA_1982_net; Number of specimens, range; Polar; Polarstern; proximate composition; PS112; PS112_106-17; PS112_109-2; PS112_111-16; PS112_25-40; PS112_25-49; PS112_27-2; PS112_50-11; PS22_net; PS40/048-2; PS40/086-5; PS40/099-2; PS40 06AQANTXIII_4; PS58; PS58/301-1; PS58/305-1; PS58/323-1; PS58/324-10; PS58/327-11; PS58/328-1; PS58/329-1; PS58/330-1; PS65; PS65/622-1; PS65/625-3; PS65/633-1; PS65/645-2; PS65/649-1; PS65/669-1; PS65/684-1; PS69; PS69/030-1; PS69/058-1; PS69/063-1; PS69/070-1; PS69/072-1; PS69/084-1; PS69/103-1; PS69/121-1; PS69/124-1; PS69/474-2; PS69/532-9; PS69/534-1; Rectangular midwater trawl; Reference/source; RMT; Salpa thompsoni, ash free dry mass; Salpa thompsoni, ash mass; Salpa thompsoni, carbohydrate content, per dry mass; Salpa thompsoni, carbohydrate content, per wet mass; Salpa thompsoni, carbon, per dry mass; Salpa thompsoni, carbon/nitrogen ratio; Salpa thompsoni, carbon mass; Salpa thompsoni, dry mass; Salpa thompsoni, energy content, per dry mass; Salpa thompsoni, life stage; Salpa thompsoni, lipid content, per dry mass; Salpa thompsoni, lipid content, per wet mass; Salpa thompsoni, nitrogen mass; Salpa thompsoni, oral-atrial length; Salpa thompsoni, protein content, per dry mass; Salpa thompsoni, protein content, per wet mass; Salpa thompsoni, wet mass; Scotia Sea; Season; South Atlantic; South Pacific Ocean; SPX1; SPX2; SPX3; SPX4; Station label; stoichiometry; Thaliacea; TT; Tucker trawl; Vessel; Year of sampling; ZNET; Zooplankton net
    Type: Dataset
    Format: text/tab-separated-values, 6271 data points
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    DATA PANGAEA
  • 3
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    Zooplankton Distribution and Community Structure in the Pacific and Atlantic Sectors of the Southern Ocean during Austral Summer 2017–18: A Pilot Study Conducted from Ukrainian Long-Liners (2020)
    Molecular Diversity Preservation International
    Details
    Publication Date: 2020-07-02
    Description: Preliminary results of the pilot study of the zooplankton in the region between the Ross and Scotia Seas from November 2017 to April 2018 are presented. In total, 53 zooplankton samples were collected in the top 100 m water layer using vertical tows of a 0.1 m2 Juday net from four Ukrainian longliners operating during the Antarctic toothfish fishery. Total zooplankton abundance ranged from 3 to 2836 ind m−3 with a global mean of 360 ± 550 (±1 SD) ind m−3. The highest abundances were recorded at the northeastern Ross Sea. At those stations, small copepods (mainly Oithona spp., Oncaea spp., Ctenocalanus spp. and copepod nauplii) numerically dominated the samples. Total biomass ranged from 0.3 to 85 mg DW m−3 with a mean of 10.9 ± 14.5 mg DW m−3. The highest biomasses were recorded at the eastern Ross Sea, where pelagic tunicates Salpa thompsoni, siphonophores and ctenophora Callianira sp. accounted for 〉90% of total zooplankton biomass. At other stations, zooplankton biomass generally ranged from 5 to 20 mg DW m−3 with no clear pattern in distribution. The community composition was driven by the sampling latitude and/or season rather than longitudinally. This pilot study emphasized the unique opportunity to investigate zooplankton dynamics in the regions traditionally not sampled during the oceanographic surveys. It also created unprecedented opportunities to increase the seasonal and geographical zooplankton sampling coverage using ships of opportunity at a fraction of a dedicated oceanographic survey costs. The potential of such surveys are enormous in both providing invaluable information, contributing to existing long-term databases and enhancing an international collaboration in the Southern Ocean, particularly in light of recent modeling initiatives of the whole Antarctic system undertaken by the Commission for the Conservation of Antarctic Marine Living Resources.
    Electronic ISSN: 2077-1312
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Molecular Diversity Preservation International
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  • 4
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    The biology of the spiny icefish Chaenodraco wilsoni Regan, 1914 (2007)
    Springer
    Details
    Publication Date: 2007-11-20
    Print ISSN: 0722-4060
    Electronic ISSN: 1432-2056
    Topics: Biology
    Published by Springer
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  • 5
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    The Biology of Mesopelagic Fishes and Their Catches (1950–2018) by Commercial and Experimental Fisheries (2021)
    Molecular Diversity Preservation International
    Details
    Publication Date: 2021-09-25
    Description: Following a brief review of their biology, this contribution is an attempt to provide a global overview of the catches of mesopelagic fishes (of which 2.68 million tonnes were officially reported to the FAO) throughout the world ocean from 1950 to 2018, to serve as a baseline to a future development of these fisheries. The overview is based on a thorough scanning of the literature dealing with commercial or experimental fisheries for mesopelagics and their catches, and/or the mesopelagic bycatch of other fisheries. All commercial (industrial and artisanal) fisheries for mesopelagic fishes were included, as well as experimental fisheries of which we were aware, while catches performed only to obtain scientific samples were omitted. The processes of generating bycatch and causing discards are discussed, with emphasis on Russian fisheries. From peer-reviewed and gray literature, we lifted information on mesopelagic fisheries and assembled it into one document, which we then summarized into two text tables with catch data, one by country/region, the other by species or species groups.
    Electronic ISSN: 2077-1312
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Molecular Diversity Preservation International
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