Funk, Steffen; Möllmann, Christian (2023): Winter cod 2022: Monitoring data recorded during RV ALKOR cruise AL568b - Gadus morhua stomach content data [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.955073
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Abstract:
This data contains monitoring data of the RV ALKOR cruise AL568b conducted in January 2022 (January 24th – February 1st) in the Western Baltic Sea by the University of Hamburg. The cruise was part of the 5-year monitoring programme Winter cod 2021-25 (Monitoring winter spawning activity of Western Baltic cod (Gadus morhua) (2021-25)) of the University of Hamburg aiming at investigating the early-winter spawning activity of Western Baltic cod to identify potential climate-induced shifts in spawning phenology. The data set contains cod stomach content data. Stomachs of cod were taken during single fish parameter measurements directly on board. Stomachs were immediately frozen on -20°C and subsequently analysed in the laboratory of the University of Hamburg. Cod stomach samples were defrosted and adherent veins were carefully removed from the outer stomach tissue. Adherent water was removed for approximately 5 seconds with paper tissues and stomachs were weighted (accuracy: 0.001 g). Subsequently, stomachs were opened, and the contents and mucus were removed before the empty stomachs weights were recorded.
Stomach content weights were derived from the differences between full and empty stomach weights. Prey organisms were identified to species level (mostly fish, and decapods), order level (e.g. for Peracarida), class level (e.g. for Echinodermata, Mollusca), or only to phylum level (e.g. for Annelida). If the digestion of the prey was already progressed too far to allow identification to the levels described above, items were allocated to the categories unidentified fish, unidentified crustaceans or unidentified invertebrates.
Keyword(s):
Related to:
Funk, Steffen; Möllmann, Christian (2022): Monitoring winter spawning activity of Western Baltic cod (Gadus morhua) (2021-25) Cruise No. AL568b. Alkor-Berichte, IMF (Institute of Marine Ecosystem and Fishery Science), AL568b, 30 pp, https://doi.org/10.3289/CR_AL568b
Funk, Steffen; Möllmann, Christian (2023): Winter cod 2022: CTD data recorded during RV ALKOR cruise AL568b. PANGAEA, https://doi.org/10.1594/PANGAEA.956042
Funk, Steffen; Möllmann, Christian (2023): Winter cod 2022: Monitoring data recorded during RV ALKOR cruise AL568b - Gadus morhua body and gonad measurements. PANGAEA, https://doi.org/10.1594/PANGAEA.955064
Funk, Steffen; Möllmann, Christian (2023): Winter cod 2022: Monitoring data recorded during RV ALKOR cruise AL568b - Station data. PANGAEA, https://doi.org/10.1594/PANGAEA.955079
Project(s):
Funding:
Federal Ministry of Education and Research (BMBF), grant/award no. 03F0914B: DAM sustainMare - SpaCeParti, University of Hamburg
Coverage:
Median Latitude: 54.510437 * Median Longitude: 10.699218 * South-bound Latitude: 54.329790 * West-bound Longitude: 10.117000 * North-bound Latitude: 54.748520 * East-bound Longitude: 11.733150
Date/Time Start: 2022-01-24T14:53:00 * Date/Time End: 2022-01-31T15:31:00
Minimum Elevation: -25.0 m * Maximum Elevation: -7.0 m
Event(s):
AL568/b_5-1 * Latitude: 54.603980 * Longitude: 10.855900 * Date/Time: 2022-01-24T14:53:00 * Elevation: -20.0 m * Location: Baltic Sea * Campaign: AL568b * Basis: Alkor (1990) * Method/Device: Trawl net (TRAWL)
AL568/b_14-1 * Latitude: 54.424540 * Longitude: 11.733150 * Date/Time: 2022-01-25T10:53:00 * Elevation: -25.0 m * Location: Baltic Sea * Campaign: AL568b * Basis: Alkor (1990) * Method/Device: Trawl net (TRAWL)
AL568/b_30-1 * Latitude: 54.467530 * Longitude: 11.371310 * Date/Time: 2022-01-26T14:44:00 * Elevation: -23.0 m * Location: Baltic Sea * Campaign: AL568b * Basis: Alkor (1990) * Method/Device: Fishing rod (FR)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Funk, Steffen | |||
| 2 | Latitude of event | Latitude | Funk, Steffen | |||
| 3 | Longitude of event | Longitude | Funk, Steffen | |||
| 4 | Date/Time of event | Date/Time | Funk, Steffen | |||
| 5 | Cruise/expedition | Expedition | Funk, Steffen | |||
| 6 | Station label | Station | Funk, Steffen | |||
| 7 | Individual ID | Ind ID | Funk, Steffen | of predator | ||
| 8 | Stomach, wet mass | Stom wm | g | Funk, Steffen | of full stomach | |
| 9 | Stomach, wet mass | Stom wm | g | Funk, Steffen | of empty stomach | |
| 10 | Stomach content, wet mass | Stom con wm | g | Funk, Steffen | ||
| 11 | Stomach content | Stom cont | Funk, Steffen | Visual identification (VID) | found in Gadus morhua | |
| 12 | Prey digestion level | Prey dig level | Funk, Steffen | NA = not defined (e.g. for Mucus); 0 = no signs of digestions, 1 = signs of digestions but flesh (i.e. muscle tissue) left; 2 = only bones or shell structures left) | ||
| 13 | Species, unique identification | Species UID | Funk, Steffen | |||
| 14 | Species, unique identification (URI) | Species UID (URI) | Funk, Steffen | |||
| 15 | Number of prey | N prey | # | Funk, Steffen | in same size, digestion stage etc. | |
| 16 | Prey, length | Prey l | mm | Funk, Steffen | for size measurements of different prey types see Funk et al., 2021 | |
| 17 | Prey, mass | Prey m | g | Funk, Steffen | of prey or digestive mucus | |
| 18 | Comment | Comment | Funk, Steffen | |||
| 19 | Prey, mass | Prey m | g | Funk, Steffen | of prey or digestive mucus | |
| 20 | Comment | Comment | Funk, Steffen |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
2137 data points
Download Data
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