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Schukat, Anna; Bode, Maya; Auel, Holger; Carballo, Rodrigo; Martin, Bettina; Koppelmann, Rolf; Hagen, Wilhelm (2015): Abundance of pelagic decapods in the northern Benguela upwelling system during AFR258, D356 and MSM17/3 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.845995, In supplement to: Schukat, A et al. (2013): Pelagic decapods in the northern Benguela upwelling system: Distribution, ecophysiology and contribution to active carbon flux. Deep Sea Research Part I: Oceanographic Research Papers, 75, 146-156, https://doi.org/10.1016/j.dsr.2013.02.003

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Funding:
Bundesministerium für Bildung und Forschung, Bonn (BMBF), grant/award no. 03F0650: Geochemistry and ecology of the Namibian upwelling system
Coverage:
Median Latitude: -19.651723 * Median Longitude: 11.467990 * South-bound Latitude: -23.074000 * West-bound Longitude: 10.366000 * North-bound Latitude: -17.250000 * East-bound Longitude: 13.683330
Date/Time Start: 2009-12-09T03:08:00 * Date/Time End: 2011-02-22T13:20:00
Minimum DEPTH, water: 25.0 m * Maximum DEPTH, water: 1650.0 m
Event(s):
AFR258_30254_7 (T-5-1_7) * Latitude: -19.000000 * Longitude: 11.433330 * Date/Time Start: 2009-12-09T03:08:00 * Date/Time End: 2009-12-09T07:55:00 * Elevation: -400.0 m * Location: Benguela Upwelling * Campaign: AFR258 * Basis: Africana (1982) * Method/Device: Singel MOCNESS 2000 (MOC-S-2000)
AFR258_30257_7 (T-2-2_7) * Latitude: -17.250000 * Longitude: 11.000000 * Date/Time Start: 2009-12-10T00:22:00 * Date/Time End: 2009-12-10T06:59:00 * Elevation: -850.0 m * Location: Benguela Upwelling * Campaign: AFR258 * Basis: Africana (1982) * Method/Device: Singel MOCNESS 2000 (MOC-S-2000)
AFR258_30259_6 (T-1-2_6) * Latitude: -17.250000 * Longitude: 10.500000 * Date/Time Start: 2009-12-10T16:08:00 * Date/Time End: 2009-12-10T21:33:00 * Elevation: -3000.0 m * Location: Benguela Upwelling * Campaign: AFR258 * Basis: Africana (1982) * Method/Device: Singel MOCNESS 2000 (MOC-S-2000)
Comment:
Pelagic decapods were collected in the northern Benguela upwelling system off the coast of Namibia on three cruises: FRS Africana (December 2009), RRS Discovery (September/October 2010) and RV Maria S. Merian (February 2011). Three transects along 17°S, 19°S and 23°S were sampled during each cruise. Decapods were collected with a 1 m**2 single (December 2009) and double (September/October 2010, February 2011) MOCNESS (Multiple Opening and Closing Net and Environmental Sensing System; Wiebe et al., 1985). The single MOCNESS was equipped with 9 and the double MOCNESS with 18 nets of 333 µm mesh size. The towing speed of the vessel was 2 knots and the heaving speed of the winch was 0.5 m s-1. Maximum sampling depth was close to the seafloor at the shallow stations (shelf and shelf break) or down to 750 m (2009), 2600 m (2010) and 3000 m (2011) at the deeper slope and oceanic stations. Discrete depths intervals (0-25, 25-50, 50-100, 100-200, 200-400, 400-600, 600-800, 800-1000 m) were sampled at most stations. At stations deeper than 1000 m, 250 m intervals were performed to a maximum depth of 3000 m. The volume filtered ranged from 181 to 368 m3 for narrow depth intervals of 50 m and from 645 to 975 m**3 for 200 m intervals. The samples were preserved in 4% buffered formaldehyde-seawater solution. In the laboratory of the Institute for Hydrobiology and Fisheries Science (IHF) at the University of Hamburg, preserved samples were sieved in size fractions of <0.5, 0.5-1, 1-2, 2-5 and >5 mm and for taxonomic analysis stored in Steedman-solution (Steedman, 1976). The size class of >5 mm was used for the recording of decapods. Decapod species were identified according to Crosnier & Forest (1968; 1969), Kensley (1971a; 1971b) and Pérez Farfante & Kensley (1997) and enumerated and measured separately (total length from the anterior margin of the eye to the end of telson). Abundance is expressed as both, numbers of individuals per m**2 and per m**3.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Event labelEventSchukat, Anna
2Latitude of eventLatitudeSchukat, Anna
3Longitude of eventLongitudeSchukat, Anna
4Date/Time of eventDate/TimeSchukat, Anna
5Depth, bottom/maxDepth botmSchukat, Anna
6Depth, top/minDepth topmSchukat, Anna
7DEPTH, waterDepth watermSchukat, AnnaGeocode
8SpeciesSpeciesSchukat, Anna
9Life stageLife stageSchukat, Anna
10Abundance per volumeAbund v#/m3Schukat, Anna
11Abundance per areaAbund a#/m2Schukat, Anna
Size:
1626 data points

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