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  • 1
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    Pelagic deep-sea fauna observed on video transects in the southern Norwegian Sea (2021)
    Springer
    Details
    Publication Date: 2024-02-07
    Description: Observations of the diversity, distribution and abundance of pelagic fauna are absent for many ocean regions in the Atlantic, but baseline data are required to detect changes in communities as a result of climate change. Gelatinous fauna are increasingly recognized as vital players in oceanic food webs, but sampling these delicate organisms in nets is challenging. Underwater (in situ) observations have provided unprecedented insights into mesopelagic communities in particular for abundance and distribution of gelatinous fauna. In September 2018, we performed horizontal video transects (50-1200 m) using the pelagic in situ observation system during a research cruise in the southern Norwegian Sea. Annotation of the video recordings resulted in 12 abundant and 7 rare taxa. Chaetognaths, the trachymedusa Aglantha digitale and appendicularians were the three most abundant taxa. The high numbers of fishes and crustaceans in the upper 100 m was likely the result of vertical migration. Gelatinous zooplankton included ctenophores (lobate ctenophores, Beroe spp., Euplokamis sp., and an undescribed cydippid) as well as calycophoran and physonect siphonophores. We discuss the distributions of these fauna, some of which represent the first record for the Norwegian Sea.
    Type: Article , PeerReviewed
    Format: text
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    PAPER (OCEANREP)
  • 2
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    Deep-sea fauna observed by pelagic video transects during HEINCKE cruise HE518, Norwegian Sea (2021)
    PANGAEA
    Details
    Publication Date: 2024-01-23
    Description: During horizontal video transects in the Norwegian Sea pelagic in situ observation system (PELAGIOS), video was collected of the water column and fauna at 4 stations, from 50 m to 1200 m. Fauna were annotated and these annotations are here presented. They include ctenophores, medusae, siphonophores, crustaceans, fishes. The dataset presents diversity, distribution and abundance data. Abundances were estimated based on conversions presented in Hoving et al 2019 (see related to).
    Keywords: Bio-Optical Platform; BOP; Date/Time of event; Deep sea; DEPTH, water; Event label; gelatinous fauna; HE518; HE518_11-1; HE518_17-1; HE518_28-1; HE518_5-1; Heincke; in situ observations; Latitude of event; Longitude of event; Norwegian Sea; pelagic; PelagicFoodfalls; Species; Specimen count; Station label; The role of pelagic foodfalls in subsidizing deep-sea bottom communities in a changing ocean
    Type: Dataset
    Format: text/tab-separated-values, 5928 data points
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    DATA PANGAEA
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