Krill biomass estimation:sampling and measurement variability
Krill are the subject of growing commercial fisheries and therefore fisheries management is necessary to ensure long-term sustainability. Krill catch limits, set by Commission for the Conservation of Antarctic Marine Living Resources, are based on absolute krill biomass, estimated from acoustic-traw...
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2022
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Online Access: | https://risweb.st-andrews.ac.uk/portal/en/researchoutput/krill-biomass-estimation(939315b1-d71d-4793-9fdf-5c72414cbcc7).html https://doi.org/10.3389/fmars.2022.903035 https://research-repository.st-andrews.ac.uk/bitstream/10023/25960/1/Bairstow_2022_F_MS_Krill_biomass_estimation_CC.pdf |
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ftunstandrewcris:oai:risweb.st-andrews.ac.uk:publications/939315b1-d71d-4793-9fdf-5c72414cbcc7 2023-05-15T13:51:00+02:00 Krill biomass estimation:sampling and measurement variability Bairstow, Fiona Gastauer, Sven Wotherspoon, Simon Brown, C. Tom A. Kawaguchi, So Edwards, Tom Cox, Martin J. 2022-08-22 application/pdf https://risweb.st-andrews.ac.uk/portal/en/researchoutput/krill-biomass-estimation(939315b1-d71d-4793-9fdf-5c72414cbcc7).html https://doi.org/10.3389/fmars.2022.903035 https://research-repository.st-andrews.ac.uk/bitstream/10023/25960/1/Bairstow_2022_F_MS_Krill_biomass_estimation_CC.pdf eng eng info:eu-repo/semantics/openAccess Bairstow , F , Gastauer , S , Wotherspoon , S , Brown , C T A , Kawaguchi , S , Edwards , T & Cox , M J 2022 , ' Krill biomass estimation : sampling and measurement variability ' , Frontiers in Marine Science , vol. 9 , 903035 . https://doi.org/10.3389/fmars.2022.903035 Marine Science Antarctic krill Biomass Fisheries acoustics Geostatistics Target strength Wetmass article 2022 ftunstandrewcris https://doi.org/10.3389/fmars.2022.903035 2022-10-31T06:44:12Z Krill are the subject of growing commercial fisheries and therefore fisheries management is necessary to ensure long-term sustainability. Krill catch limits, set by Commission for the Conservation of Antarctic Marine Living Resources, are based on absolute krill biomass, estimated from acoustic-trawl surveys. In this work, we develop a method for determining an error budget for acoustic-trawl surveys of krill which includes sampling and measurement variability. We use our error budget method to examine the sensitivity of biomass estimates to parameters in acoustic target strength (TS) models, length frequency distribution and length to wetmass relationships derived from net data. We determined that the average coefficient of variation ( CV ) of estimated biomass was 17.7% and the average CV due from scaling acoustic observations to biomass density was 5.3%. We found that a large proportion of the variability of biomass estimates is due to the krill orientation distribution, a parameter in the TS model. Orientation distributions with narrow standard deviations were found to emphasise the results of nulls in the TS to length relationship, which has to potential to lead to biologically implausible results. Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill University of St Andrews: Research Portal Antarctic Frontiers in Marine Science 9 |
institution |
Open Polar |
collection |
University of St Andrews: Research Portal |
op_collection_id |
ftunstandrewcris |
language |
English |
topic |
Marine Science Antarctic krill Biomass Fisheries acoustics Geostatistics Target strength Wetmass |
spellingShingle |
Marine Science Antarctic krill Biomass Fisheries acoustics Geostatistics Target strength Wetmass Bairstow, Fiona Gastauer, Sven Wotherspoon, Simon Brown, C. Tom A. Kawaguchi, So Edwards, Tom Cox, Martin J. Krill biomass estimation:sampling and measurement variability |
topic_facet |
Marine Science Antarctic krill Biomass Fisheries acoustics Geostatistics Target strength Wetmass |
description |
Krill are the subject of growing commercial fisheries and therefore fisheries management is necessary to ensure long-term sustainability. Krill catch limits, set by Commission for the Conservation of Antarctic Marine Living Resources, are based on absolute krill biomass, estimated from acoustic-trawl surveys. In this work, we develop a method for determining an error budget for acoustic-trawl surveys of krill which includes sampling and measurement variability. We use our error budget method to examine the sensitivity of biomass estimates to parameters in acoustic target strength (TS) models, length frequency distribution and length to wetmass relationships derived from net data. We determined that the average coefficient of variation ( CV ) of estimated biomass was 17.7% and the average CV due from scaling acoustic observations to biomass density was 5.3%. We found that a large proportion of the variability of biomass estimates is due to the krill orientation distribution, a parameter in the TS model. Orientation distributions with narrow standard deviations were found to emphasise the results of nulls in the TS to length relationship, which has to potential to lead to biologically implausible results. |
format |
Article in Journal/Newspaper |
author |
Bairstow, Fiona Gastauer, Sven Wotherspoon, Simon Brown, C. Tom A. Kawaguchi, So Edwards, Tom Cox, Martin J. |
author_facet |
Bairstow, Fiona Gastauer, Sven Wotherspoon, Simon Brown, C. Tom A. Kawaguchi, So Edwards, Tom Cox, Martin J. |
author_sort |
Bairstow, Fiona |
title |
Krill biomass estimation:sampling and measurement variability |
title_short |
Krill biomass estimation:sampling and measurement variability |
title_full |
Krill biomass estimation:sampling and measurement variability |
title_fullStr |
Krill biomass estimation:sampling and measurement variability |
title_full_unstemmed |
Krill biomass estimation:sampling and measurement variability |
title_sort |
krill biomass estimation:sampling and measurement variability |
publishDate |
2022 |
url |
https://risweb.st-andrews.ac.uk/portal/en/researchoutput/krill-biomass-estimation(939315b1-d71d-4793-9fdf-5c72414cbcc7).html https://doi.org/10.3389/fmars.2022.903035 https://research-repository.st-andrews.ac.uk/bitstream/10023/25960/1/Bairstow_2022_F_MS_Krill_biomass_estimation_CC.pdf |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctic Krill |
genre_facet |
Antarc* Antarctic Antarctic Krill |
op_source |
Bairstow , F , Gastauer , S , Wotherspoon , S , Brown , C T A , Kawaguchi , S , Edwards , T & Cox , M J 2022 , ' Krill biomass estimation : sampling and measurement variability ' , Frontiers in Marine Science , vol. 9 , 903035 . https://doi.org/10.3389/fmars.2022.903035 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3389/fmars.2022.903035 |
container_title |
Frontiers in Marine Science |
container_volume |
9 |
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1766254572275236864 |