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Trophic ecology of squids in the Benguela Upwelling System assessed through stomach content, fatty acid and stable isotopes analyses in austral spring 2021 - Stomach contents of squids

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Title: Trophic ecology of squids in the Benguela Upwelling System assessed through stomach content, fatty acid and stable isotopes analyses in austral spring 2021 - Stomach contents of squids
Authors: Kremer, Kira Izabela, Oesterwind, Daniel, Sell, Anne F
Publisher Information: PANGAEA
Publication Year: 2025
Collection: PANGAEA - Data Publisher for Earth & Environmental Science (AWI Bremerhaven / MARUM Bremen)
Subject Terms: Cephalopoda, mantle length, stomach content, presence/absence, Cephalopods, Crustacea, Date/Time of event, Date/Time of event 2, Depth, water, bottom/maximum, top/minimum, Elevation of event, Elevation of event 2, Event label, Family, Fish, Food web, Gastropoda, Gear, Hook and line, Identification, Latitude of event, Latitude of event 2, Location, Location of event, Longitude of event, Longitude of event 2, Measured, Method/Device of event
Subject Geographic: MEDIAN LATITUDE: -25.766498 * MEDIAN LONGITUDE: 12.956356 * SOUTH-BOUND LATITUDE: -31.992820 * WEST-BOUND LONGITUDE: 10.862700 * NORTH-BOUND LATITUDE: -20.049370 * EAST-BOUND LONGITUDE: 15.849520 * DATE/TIME START: 2021-09-13T01:00:49 * DATE/TIME END: 2021-10-08T05:01:21 * MINIMUM ELEVATION: -4761.9 m * MAXIMUM ELEVATION: -314.4 m
Description: Squids were collected during the research cruise SO285 on RV Sonne in the northern (nBUS) and southern (sBUS) Benguela Upwelling System between September 13 and October 8, 2021 in order to determine their trophic position and nutritional ecology. The cruise was part of the TRAFFIC (Trophic tRAnsfer eFFICiency in the Benguela Current) project. Samples were retrieved from rectangular midwater trawl (RMT) net hauls at 8 stations in the nBUS (sampling ranged from surface down to 230–600 m) and 5 stations in the sBUS (sampling ranged from surface down to 500–750 m). Furthermore, some squids were caught using hook and line in the upper two meters of the water column at 2 stations in the nBUS (ranging from 20 to 115 min per station, 4–5 rods) and 4 stations in the sBUS (ranging from 45 to 105 min per station, 4–6 rods). At 1 station in sBUS one squid was retrieved from a neuston catamaran haul (NCAT) used to sample the surface layer (0­–20 cm sampling depth). Dorsal mantle length (DML) of each specimen was measured to the nearest mm below. Visual stomach content analyses of 53 stomachs from chosen epi- and mesopelagic squid species were performed using a stereo-microscope (7.5–50x magnification). Stomach content analyses showed that squid species preyed on a variety of organisms ranging from crustaceans to lanternfishes (Myctophidae) and flying squids (Ommastrephidae).
Document Type: dataset
File Description: text/tab-separated-values, 764 data points
Language: English
Relation: Kremer, Kira Izabela; Hagen, Wilhelm; Oesterwind, Daniel; Duncan, Sabrina; Bode-Dalby, Maya; Dorschner, Sabrina; Dudeck, Tim; Sell, Anne F (2025): Trophic ecology of squids in the Benguela Upwelling System elucidated by combining stomach content, stable isotope and fatty acid analyses. Marine Biology, 172(2), 32, https://doi.org/10.1007/s00227-024-04592-2; Bode-Dalby, Maya; Dorschner, Sabrina; Kremer, Kira Izabela; Hagen, Wilhelm; Sell, Anne F (2025): Trophic ecology of squids in the Benguela Upwelling System assessed through stomach content, fatty acid and stable isotopes analyses in austral spring 2021 - Stable isotope baseline measurements [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.974073; Kremer, Kira Izabela; Hagen, Wilhelm; Dorschner, Sabrina; Sell, Anne F (2025): Trophic ecology of squids in the Benguela Upwelling System assessed through stomach content, fatty acid and stable isotopes analyses in austral spring 2021 - Fatty acid contents of squids [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.974064; Kremer, Kira Izabela; Sell, Anne F (2025): Trophic ecology of squids in the Benguela Upwelling System assessed through stomach content, fatty acid and stable isotopes analyses in austral spring 2021 - Stable isotope measurements of squids [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.974072; https://doi.pangaea.de/10.1594/PANGAEA.974071; https://doi.org/10.1594/PANGAEA.974071
DOI: 10.1594/PANGAEA.974071
Availability: https://doi.pangaea.de/10.1594/PANGAEA.974071
https://doi.org/10.1594/PANGAEA.974071
Rights: CC-BY-4.0: Creative Commons Attribution 4.0 International ; Access constraints: unrestricted ; info:eu-repo/semantics/openAccess
Accession Number: edsbas.8D57AD24
Database: BASE
Description
Abstract:Squids were collected during the research cruise SO285 on RV Sonne in the northern (nBUS) and southern (sBUS) Benguela Upwelling System between September 13 and October 8, 2021 in order to determine their trophic position and nutritional ecology. The cruise was part of the TRAFFIC (Trophic tRAnsfer eFFICiency in the Benguela Current) project. Samples were retrieved from rectangular midwater trawl (RMT) net hauls at 8 stations in the nBUS (sampling ranged from surface down to 230–600 m) and 5 stations in the sBUS (sampling ranged from surface down to 500–750 m). Furthermore, some squids were caught using hook and line in the upper two meters of the water column at 2 stations in the nBUS (ranging from 20 to 115 min per station, 4–5 rods) and 4 stations in the sBUS (ranging from 45 to 105 min per station, 4–6 rods). At 1 station in sBUS one squid was retrieved from a neuston catamaran haul (NCAT) used to sample the surface layer (0­–20 cm sampling depth). Dorsal mantle length (DML) of each specimen was measured to the nearest mm below. Visual stomach content analyses of 53 stomachs from chosen epi- and mesopelagic squid species were performed using a stereo-microscope (7.5–50x magnification). Stomach content analyses showed that squid species preyed on a variety of organisms ranging from crustaceans to lanternfishes (Myctophidae) and flying squids (Ommastrephidae).
DOI:10.1594/PANGAEA.974071