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Olivar, M Pilar; Hulley, P Alexander; Castellón, Arturo; López, Cristina; Tuset, Victor M; Contreras, Tabit (2021): Abundance of mesopelagic fish through the water column and diel patterns in the tropical and equatorial Atlantic. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.927991 (dataset in review)

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Abstract:
This file contains data on numerical abundance of mesopelagic fishes collected in April 2015 across the tropical and equatorial Atlantic. Twelve stations were visited day and night, from the oligotrophic region close to the Brazilian coast to the more productive region off the western African coast. Hauls were performed with a scientific midwater trawl, the Mesopelagos (designed by Meillat, 2012), which works with a single traction cable. The gear consists of graded-mesh netting starting with 30 mm and ending with 4 mm. At the end of the net, a multi-sampler (designed for the present investigation by one of the co-authors, A. Castellón-CSIC) was installed to obtain samples from 5 different depth layers of the water column. For some stations, where lots of gelatinous organisms, or Sargassum weed occurred, the system could not work and the data presented integrates the water column from 800 m to the surface. The depth of the net was controlled by a SCANMAR system. Samples were identified on board or frozen for a later identification in the laboratory. These data were obtained within the project: "Migrants and Active Flux In the Atlantic Ocean, financed by the Spanish Ministerio de Ciencia e Innovación CTM2012-39587-C04.
Keyword(s):
Biodiversity; distribution; mesopelagic fish; vertical migration
Related to:
Olivar, M Pilar; Contreras, Tabit; Hulley, P Alexander; López, Cristina; Tuset, Victor M; Castellón, Arturo (2021): Abundance of early stages of mesopelagic fish through the water column and diel patterns in the tropical and equatorial Atlantic. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.928080
Olivar, M Pilar; Hulley, P Alexander; Castellón, Arturo; Emelianov, Mikhail; López, Cristina; Tuset, Victor M; Contreras, Tabit; Molí, Balbina (2017): Mesopelagic fishes across the tropical and equatorial Atlantic: Biogeographical and vertical patterns. Progress in Oceanography, 151, 116-137, https://doi.org/10.1016/j.pocean.2016.12.001
Further details:
Carpenter, Kent E; De Angelis, Nicoletta (2016): The living marine resources of the Eastern Central Atlantic. Volume 3: Bony fishes, part 1 (Elopiformes-Scorpaeniformes). FAO, Rome, FAO Species Identification Guide for Fishery Purposes, 3, 1511-2342
Hernández-León, Santiago; UTM-CSIC (2018): MAFIA Cruise, RV Hespérides. UTM-CSIC, https://doi.org/10.20351/29HE20150403
Meillat, Marc (2012): Essais du chalut mésopélagos pour le programme MYCTO 3D-MAP de l'IRD, à bord du Marion Dufresne. Du 10 au 21 Août 2012. 09 2012 - RBE/STH/LTH 2012-05.
Whitehead, Peter James Palmer; Bauchot, M-L; Hureau, Jean-Claude; Nielsen, John; Tortonese, E (1986): Fishes of the North-eastern Atlantic and the Mediterranean. UNESCO, Paris, 1-3, 1473 pp.
Coverage:
Median Latitude: 8.694352 * Median Longitude: -23.833155 * South-bound Latitude: -13.131110 * West-bound Longitude: -34.050830 * North-bound Latitude: 25.429420 * East-bound Longitude: -17.328120
Date/Time Start: 2015-04-05T01:32:00 * Date/Time End: 2015-04-27T22:56:00
Minimum DEPTH, water: m * Maximum DEPTH, water: 1000 m
Event(s):
MAFIA_PEL_10D * Latitude Start: 18.128330 * Longitude Start: -20.164120 * Latitude End: 18.168830 * Longitude End: -20.152900 * Date/Time Start: 2015-04-23T10:49:00 * Date/Time End: 2015-04-23T12:23:00 * Elevation: -3178.0 m * Mesh size: 4 mm * Location: Central Atlantic * Campaign: MAFIA * Basis: Hespérides * Method/Device: Midwater trawl, Mesopelagos (Meillat, 2012) (Mesopelagos)
MAFIA_PEL_10N * Latitude Start: 18.071870 * Longitude Start: -20.214950 * Latitude End: 18.121500 * Longitude End: -20.194280 * Date/Time Start: 2015-04-23T23:05:00 * Date/Time End: 2015-04-24T00:36:00 * Elevation: -3174.0 m * Mesh size: 4 mm * Location: Central Atlantic * Campaign: MAFIA * Basis: Hespérides * Method/Device: Midwater trawl, Mesopelagos (Meillat, 2012) (Mesopelagos)
MAFIA_PEL_111N * Latitude Start: 21.686700 * Longitude Start: -18.836970 * Latitude End: 21.703750 * Longitude End: -18.923050 * Date/Time Start: 2015-04-25T21:49:00 * Date/Time End: 2015-04-25T22:54:00 * Elevation: -3092.0 m * Mesh size: 4 mm * Location: Central Atlantic * Campaign: MAFIA * Basis: Hespérides * Method/Device: Midwater trawl, Mesopelagos (Meillat, 2012) (Mesopelagos)
Comment:
When specimens were damaged and identification could not be made with absolute certainty, a “?” was included in front of the species name.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Event labelEventOlivar, M Pilar
2IdentificationIDOlivar, M Pilarhaul
3Date/time startDate/time startOlivar, M Pilar
4Date/time endDate/time endOlivar, M Pilar
5Latitude of eventLatitudeOlivar, M Pilar
6Longitude of eventLongitudeOlivar, M Pilar
7Latitude of event 2Latitude 2Olivar, M Pilar
8Longitude of event 2Longitude 2Olivar, M Pilar
9CodeCodeOlivar, M Pilarhaul layer
10Light modeL modeOlivar, M Pilar
11Depth, bathymetricBathy depthmOlivar, M Pilar
12DEPTH, waterDepth watermOlivar, M PilarGeocode – min
13DEPTH, waterDepth watermOlivar, M PilarGeocode – max
14Towing speedTowing speedknOlivar, M Pilar
15Mouth area, effectiveMouth area effm2Olivar, M Pilar
16Water volume, filteredVol filteredm3Olivar, M PilarCalculated
17Life stageLife stageOlivar, M PilarVisual identification (VID)
18OrderOrderOlivar, M PilarVisual identification (VID)
19FamilyFamilyOlivar, M PilarVisual identification (VID)
20Taxon/taxaTaxaOlivar, M PilarVisual identification (VID)
21Number of individualsInd No#Olivar, M PilarCounting, visual
Size:
17356 data points

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