Stomach contents of Benthosema glaciale collected during RV G.O. Sars cruise 2013107 across the North Atlantic in 2013 ...

• Main Authors: Knutsen, Tor, Strand, Espen, Klevjer, Thor Aleksander, Salvanes, Anne Gro Vea, Thorsen Broms, Cecilie, Myhre Sunde, Synne, Aksnes, Dag Lorents, García-Seoane, Eva, Melle, Webjørn
• Format: Dataset
• Language: English
• Published: PANGAEA 2022
• Subjects: Benthosema glaciale; diet; mesopelagic fish; North Atlantic; Event label; Optional event label; Date/Time of event; Date/Time of event 2; Latitude of event; Longitude of event; DEPTH, water; Series; Species, unique identification; Species, unique identification URI; Species, unique identification Semantic URI; Specimen identification; Sample ID; Stomach content, wet mass; Stomach content, dry mass; Taxon/taxa; Taxon/taxa, unique identification URI; Taxon/taxa, unique identification Semantic URI; Prey digestion level; Prey, length; Life stage; Number of prey; Quality code; Sample comment; Harstad trawl; Macroplankton trawl; Weighted; Visual identification; Counted; GS13/107; G. O. Sars 2003; Basin Scale Analysis, Synthesis and Integration EURO-BASIN; Ecologically and economically sustainable mesopelagic fisheries MEESO; Sustainable Management of Mesopelagic Resources SUMMER; Greenland; Norway; Bergen; Nuuk; glacier
• Online Access: https://dx.doi.org/10.1594/pangaea.951043; https://doi.pangaea.de/10.1594/PANGAEA.951043

The data is used in a comparative analysis of the diet of one of the globally most numerous myctophids, the Glacier lantern fish Benthosema glaciale, across four deep basins of the North Atlantic. We present taxonomic information, weight and number of prey items of each fish that has stomach content, as long as it has been possible to assign prey to a species or other taxonomic category. Unidentified prey usually had a high degree of digestion and individual items could not be counted, but could be weighed. Sampling were undertaken onboard the RV G.O. Sars during a six week long transatlantic scientific survey from Bergen (Norway) to Nuuk (Greenland) and back to Bergen in May and June 2013. The Harstad trawl is a graded (variable mesh size), small mid-water trawl with 20 m vertical opening and 15 m wing spread (Godø et al., 1993). The Macroplankton trawl on the other hand is a light pelagic trawl that has a nominal 6x6 m trawl opening and mesh size of 3 mm square light opening (8 mm stretched, knot to knot) ... : Prey digestion level:Undigested (1): Digestion has not begun, and the stomach content appears fresh.Digestion commenced (2): Species can be easily identified.Advanced digestion (3): The species can no longer be identified but can be separated into systematic groups.Late-stage digestion (4): Only residues like eyes and robust part of animals can separated into systematic groups.Nearly complete digestion (5): The stomach contents are stewed or mushy, cannot be identified or counted.Quality of biological analysis: "Low" was also used to indicate that these fish were considered part of a training set not used in further analysis.Funding and ship time were also received from the Institute of Marine Research, Bergen, Norway. ...