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Huse, Geir (2014): Spatially explicit estimates of length and biomass of Micromesistius poutassou (Blue Whiting) from acoustic and trawl surveys in the North-East Atlantic in May 2012 [dataset]. Institute of Marine Research, Bergen, PANGAEA, https://doi.org/10.1594/PANGAEA.827380, In supplement to: Huse, Geir; MacKenzie, Brian R; Trenkel, Verena M; Doray, Mathieu; Nøttestad, Leif; Óskarsson, Guomundur J (2015): Spatially explicit estimates of stock sizes, structure and biomass of herring and blue whiting, and catch data of bluefin tuna. Earth System Science Data, 7(1), 35-46, https://doi.org/10.5194/essd-7-35-2015

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Abstract:
Acoustic estimates of herring and blue whiting abundance were obtained during the surveys using the Simrad ER60 scientific echosounder. The allocation of NASC-values to herring, blue whiting and other acoustic targets were based on the composition of the trawl catches and the appearance of echo recordings. To estimate the abundance, the allocated NASC -values were averaged for ICES-squares (0.5° latitude by 1° longitude). For each statistical square, the unit area density of fish (rA) in number per square nautical mile (N*nm-2) was calculated using standard equations (Foote et al., 1987; Toresen et al., 1998). To estimate the total abundance of fish, the unit area abundance for each statistical square was multiplied by the number of square nautical miles in each statistical square and then summed for all the statistical squares within defined subareas and over the total area. Biomass estimation was calculated by multiplying abundance in numbers by the average weight of the fish in each statistical square then summing all squares within defined subareas and over the total area. The Norwegian BEAM soft-ware (Totland and Godø 2001) was used to make estimates of total biomass.
Further details:
Foote, KG; Knudsen, H P; Vestnes, G; MacLennan, David N; Simmonds, E J (1987): Calibration of acoustic instruments for fish density estimation: a practical guide. Ices Cooperative Research Report-Rapport des Recherches Collectives, 144, 69, https://doi.org/10.1121/1.396131
Toresen, R; Grøsaeter, H; de Barros, P (1998): The acoustic method as used in the abundance estimation of capelin (Mallotus villosus) and herring (Clupea harengus) in the Barents Sea. Fisheries Research, 34, 27-38, https://doi.org/10.1016/S0165-7836(97)00077-5
Totland, A; Godø, O (2001): BEAM – an interactive GIS application for acoustic abundance estimation. In T. Nishida, P.R. Kailola and C.E. Hollingworth (Eds): Proceedings of the First Symposium on geographic Information System (GIS) in Fisheries Science. Fishery GIS Research Group. Saitama, Japan
Funding:
Seventh Framework Programme (FP7), grant/award no. 264933: Basin Scale Analysis, Synthesis and Integration
Coverage:
Median Latitude: 67.818584 * Median Longitude: 2.911504 * South-bound Latitude: 62.500000 * West-bound Longitude: -29.000000 * North-bound Latitude: 74.500000 * East-bound Longitude: 19.000000
Date/Time Start: 2012-05-15T00:00:00 * Date/Time End: 2012-05-15T00:00:00
Event(s):
MPW-2012  * Comment: gridded data from North Atlantic surveys taken place in May 2012
Comment:
The research leading to these results received (partial/full) funding from the European Commission FP7 EURO-BASIN (European Basin-Scale Anal ysis, Synthesis, and Integration; Grant Agreement 264 933).
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
Event labelEvent
LATITUDELatitudeGeocode
LONGITUDELongitudeGeocode
DATE/TIMEDate/TimeGeocode
CodeCodeHuse, Geirunique identifier of the grid
AreaAreakm2Huse, Geirof the grid
Micromesistius poutassou abundance as Nautical Area Scattering CoefficientM. poutassou NASCm2/nmi2Huse, Geirafter MacLennan et al. (2002)
Micromesistius poutassou, biomassM. poutassou biomkg/km2Huse, GeirCalculated from nautical area scattering coefficient
Size:
452 data points

Data

Download dataset as tab-delimited text — use the following character encoding:


Event

Latitude

Longitude

Date/Time

Code

Area [km2]

M. poutassou NASC [m2/nmi2]

M. poutassou biom [kg/km2]
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MPW-201262.5-52012-056200060010201399639.0000000.001638
MPW-201262.5-72012-056200080010201228336.0000000.001512
MPW-201262.5-92012-0562001000102016850143.0000000.006043
MPW-201262.5-112012-0562001200102017992207.0000000.094102
MPW-201262.5-132012-056200140010201571114.0000000.004278
MPW-201262.5-192012-056200200010201342624.0000000.019412
MPW-201262.5-212012-05620022001020157174.0000000.002246
MPW-201262.5-232012-056200240010201114235.0000000.001030
MPW-201262.5-252012-0562002600102011142117.0000000.003375
MPW-201263.512012-0563000000102001103299.0000000.003646
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MPW-201263.5-152012-0563001600102011655141.0000000.004619
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MPW-201263.5-192012-056300200010201552241.0000000.007565
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MPW-201263.5-232012-0563002400102012206276.0000000.008108
MPW-201263.5-252012-0563002600102011655447.0000000.012935
MPW-201263.5-272012-0563002800102012206461.0000000.013326
MPW-201264.512012-0564000000102001064447.0000000.001276
MPW-201264.532012-0564000200102001064494.0000000.002620
MPW-201264.552012-05640004001020010644302.0000000.008815
MPW-201264.572012-05640006001020010644264.0000000.007387
MPW-201264.592012-056400080010200479011.0000000.000308
MPW-201264.5-132012-056400140010201319320.0000000.000658
MPW-201264.5-272012-0564002800102014790213.0000000.006158
MPW-201264.5-292012-0564003000102015323.0000000.000087
MPW-201265.512012-05650000001020010253368.0000000.010694
MPW-201265.532012-05650002001020010253272.0000000.007913
MPW-201265.552012-05650004001020010253452.0000000.013103
MPW-201265.572012-05650006001020010253140.0000000.004151
MPW-201265.592012-05650008001020010253132.0000000.003969
MPW-201266.512012-0566000000102009859304.0000000.009041
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MPW-201267.5-12012-056700020010201946214.0000000.000404
MPW-201267.552012-056700040010200946241.0000000.001337
MPW-201267.572012-056700060010200946248.0000000.001543
MPW-201267.592012-0567000800102009462135.0000000.004291
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MPW-201267.5132012-056700120010200283929.0000000.000751
MPW-201268.512012-056800000010200906216.0000000.000623
MPW-201268.532012-056800020010200906238.0000000.001569
MPW-201268.5-12012-05680002001020190622.0000000.000076
MPW-201268.552012-056800040010200906220.0000000.000747
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MPW-201270.5172012-0570001600102008253235.0000000.005818
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MPW-201272.572012-05720006001020074352.0000000.000076
MPW-201272.592012-057200080010200743522.0000000.000599
MPW-201272.5112012-057200100010200743570.0000000.001905
MPW-201272.5132012-057200120010200743512.0000000.000407
MPW-201272.5152012-057200140010200743580.0000000.002788
MPW-201272.5172012-0572001600102007435126.0000000.004390
MPW-201272.5192012-057200180010200743528.0000000.000976
MPW-201273.5112012-05730010001020070223.0000000.000129
MPW-201273.5132012-057300120010200702211.0000000.000473
MPW-201273.5152012-0573001400102007022101.0000000.004341
MPW-201273.5172012-057300160010200702230.0000000.001289
MPW-201273.5192012-057300180010200702212.0000000.000516
MPW-201274.592012-05740008001020026434.0000000.000172
MPW-201274.5112012-05740010001020046255.0000000.000215
MPW-201274.5132012-05740012001020066076.0000000.000258
MPW-201274.5152012-057400140010200462517.0000000.000731
MPW-201274.5172012-057400160010200198212.0000000.000516
MPW-201274.5192012-0574001800102003301.0000000.000043