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Research data . Dataset . 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 2009

Huse, Geir;
Open Access
Published: 01 Jan 2014
Publisher: PANGAEA
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.

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).

Subjects

Area, Basin Scale Analysis, Calculated from nautical area scattering coefficient, Code, DATE TIME, Event label, LATITUDE, LONGITUDE, Micromesistius poutassou, Micromesistius poutassou abundance as Nautical Area Scattering Coefficient, Synthesis and Integration EURO BASIN, after MacLennan et al 2002, biomass, Earth System Research, DATE/TIME, Micromesistius poutassou, biomass, after MacLennan et al. (2002), Basin Scale Analysis, Synthesis and Integration (EURO-BASIN)

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Funded by
EC| EURO-BASIN
Project
EURO-BASIN
European Union Basin-scale Analysis, Synthesis and Integration (EURO-BASIN)
  • Funder: European Commission (EC)
  • Project Code: 264933
  • Funding stream: FP7 | SP1 | ENV
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Dataset . 2014
Data sources: B2FIND
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