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Kremer, Kira Izabela; Oesterwind, Daniel; Sell, Anne F: 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 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.974071 (dataset in review)

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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 9, 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 17 rectangular midwater trawl (RMT) net hauls at 11 stations in the nBUS (sampling range 88–600 m) and 17 RMT net hauls at 14 stations in the sBUS (sampling range 80–750 m). Furthermore, hooks and lines were used at 10 stations in the nBUS (ranging from 15 to 160 min per station, 2–6 rods) and 13 stations in the sBUS (ranging from 20 to 105 min per station, 1–6 rods) in the upper two meters of the water column. 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).
Keyword(s):
Cephalopods; Food web; nutritional ecology; trophic markers; trophic position; upwelling systems
Supplement to:
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
Related to:
Kremer, Kira Izabela; Hagen, Wilhelm; Bode-Dalby, Maya; Sell, Anne F: 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.pangaea.de/10.1594/PANGAEA.974073
Kremer, Kira Izabela; Hagen, Wilhelm; Dorschner, Sabrina; Sell, Anne F: 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.pangaea.de/10.1594/PANGAEA.974064
Kremer, Kira Izabela; Sell, Anne F: 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.pangaea.de/10.1594/PANGAEA.974072
Project(s):
Trophic Transfer Efficiency in the Benguela Current (TRAFFIC)
Funding:
Federal Ministry of Education and Research (BMBF), grant/award no. SPACES II 03F0797A: Trophic Transfer Efficiency in the Benguela Current
Federal Ministry of Education and Research (BMBF), grant/award no. SPACES II 03F0797B: Trophic Transfer Efficiency in the Benguela Current
Federal Ministry of Education and Research (BMBF), grant/award no. SPACES II 03F0797D: Trophic Transfer Efficiency in the Benguela Current
Coverage:
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
Event(s):
SO285_16-1 * Latitude Start: -27.638300 * Longitude Start: 10.862700 * Latitude End: -27.771750 * Longitude End: 10.918220 * Date/Time Start: 2021-09-13T01:00:49 * Date/Time End: 2021-09-13T04:38:52 * Elevation Start: -4761.9 m * Elevation End: -4746.3 m * Location: South Atlantic Ocean * Campaign: SO285 (TRAFFIC) * Basis: Sonne_2 * Method/Device: Rectangular midwater trawl 4500 µm (RMT8) * Comment: in the cruise report, the mesh size was erroneously reported as 4000 µm
SO285_17-1_1 * Latitude: -29.199920 * Longitude: 12.000150 * Date/Time: 2021-09-13T18:27:09 * Elevation: -3878.6 m * Location: South Atlantic Ocean * Campaign: SO285 (TRAFFIC) * Basis: Sonne_2 * Method/Device: Hook and line * Comment: Fishing during CTD cast for 20 to 105 min using 1-6 fishing rods; event was not logged in DSHIP
SO285_17-7 * Latitude Start: -29.262070 * Longitude Start: 12.003620 * Latitude End: -29.329870 * Longitude End: 12.007550 * Date/Time Start: 2021-09-13T22:07:46 * Date/Time End: 2021-09-14T00:21:02 * Elevation Start: -3873.2 m * Elevation End: -3877.8 m * Location: South Atlantic Ocean * Campaign: SO285 (TRAFFIC) * Basis: Sonne_2 * Method/Device: Rectangular midwater trawl 4500 µm (RMT8) * Comment: in the cruise report, the mesh size was erroneously reported as 4000 µm
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Event labelEventKremer, Kira Izabela
2Date/Time of eventDate/TimeKremer, Kira Izabela
3Date/Time of event 2Date/Time 2Kremer, Kira Izabela
4Latitude of eventLatitudeKremer, Kira Izabela
5Longitude of eventLongitudeKremer, Kira Izabela
6Latitude of event 2Latitude 2Kremer, Kira Izabela
7Longitude of event 2Longitude 2Kremer, Kira Izabela
8Location of eventLocationKremer, Kira Izabela
9LocationLocationKremer, Kira Izabela
10Elevation of eventElevationmKremer, Kira Izabela
11Elevation of event 2Elevation 2mKremer, Kira Izabela
12Depth, water, top/minimumDepth water topmKremer, Kira Izabela
13Depth, water, bottom/maximumDepth water botmKremer, Kira Izabela
14Method/Device of eventMethod/DeviceKremer, Kira Izabela
15GearGearKremer, Kira Izabela
16Sample IDSample IDKremer, Kira Izabela
17FamilyFamilyKremer, Kira Izabela
18IdentificationIDKremer, Kira IzabelaTaxon as identified
19Species, unique identificationSpecies UIDKremer, Kira IzabelaReference in WoRMS (WoRMS)
20Species, unique identification (URI)Species UID (URI)Kremer, Kira IzabelaReference in WoRMS (WoRMS)
21Species, unique identification (Semantic URI)Species UID (Semantic URI)Kremer, Kira IzabelaReference in WoRMS (WoRMS)
22Cephalopoda, mantle lengthCephalopoda MLmmKremer, Kira IzabelaMeasuredDorsal mantle length (DML); measured to the nearest mm below
23Stomach fullnessStom fillKremer, Kira IzabelaStereomicroscopyExamined using stereomicroscopy (7.5-50x magnification); categories 0-4 (0 = 0%; 1 = 1-25%, 2 = 26-50%; 3 = 51-75%; 4 = 76-100%)
24Crustacea, stomach content, presence/absenceCrustacea stomach contKremer, Kira IzabelaStereomicroscopyExamined using stereomicroscopy (7.5-50x magnification); present = 1; absent = 0
25Fish, stomach content, presence/absenceFish stomach contKremer, Kira IzabelaStereomicroscopyExamined using stereomicroscopy (7.5-50x magnification); present = 1; absent = 0
26Cephalopoda, stomach content, presence/absenceCephalopoda stomach contKremer, Kira IzabelaStereomicroscopyExamined using stereomicroscopy (7.5-50x magnification); present = 1; absent = 0
27Gastropoda, stomach content, presence/absenceGastropoda stomach contKremer, Kira IzabelaStereomicroscopyExamined using stereomicroscopy (7.5-50x magnification); present = 1; absent = 0
28Polychaeta, stomach content, presence/absencePolychaeta stomach contKremer, Kira IzabelaStereomicroscopyExamined using stereomicroscopy (7.5-50x magnification); present = 1; absent = 0
29Other, stomach content, presence/absenceOther stomach contKremer, Kira IzabelaStereomicroscopyExamined using stereomicroscopy (7.5-50x magnification); present = 1; absent = 0
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
764 data points

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