Krill biomass estimation: Sampling and measurement variability Article Swipe
Fiona Bairstow
,
Sven Gastauer
,
Simon Wotherspoon
,
C. T. A. Brown
,
So Kawaguchi
,
Tom J. Edwards
,
Martin J. Cox
·
YOU?
·
· 2022
· Open Access
·
· DOI: https://doi.org/10.3389/fmars.2022.903035
YOU?
·
· 2022
· Open Access
·
· DOI: https://doi.org/10.3389/fmars.2022.903035
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.
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Metadata
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.3389/fmars.2022.903035
- https://www.frontiersin.org/articles/10.3389/fmars.2022.903035/pdf
- OA Status
- gold
- Cited By
- 5
- References
- 42
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W4292703467
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Raw OpenAlex JSON
- OpenAlex ID
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https://openalex.org/W4292703467Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.3389/fmars.2022.903035Digital Object Identifier
- Title
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Krill biomass estimation: Sampling and measurement variabilityWork title
- Type
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articleOpenAlex work type
- Language
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enPrimary language
- Publication year
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2022Year of publication
- Publication date
-
2022-08-22Full publication date if available
- Authors
-
Fiona Bairstow, Sven Gastauer, Simon Wotherspoon, C. T. A. Brown, So Kawaguchi, Tom J. Edwards, Martin J. CoxList of authors in order
- Landing page
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https://doi.org/10.3389/fmars.2022.903035Publisher landing page
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https://www.frontiersin.org/articles/10.3389/fmars.2022.903035/pdfDirect link to full text PDF
- Open access
-
YesWhether a free full text is available
- OA status
-
goldOpen access status per OpenAlex
- OA URL
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https://www.frontiersin.org/articles/10.3389/fmars.2022.903035/pdfDirect OA link when available
- Concepts
-
Krill, Biomass (ecology), Environmental science, Euphausia, Antarctic krill, Sampling (signal processing), Standard deviation, Target strength, Fishery, Oceanography, Statistics, Mathematics, Biology, Geology, Computer science, Fish
, Computer vision, Filter (signal processing) Top concepts (fields/topics) attached by OpenAlex - Cited by
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5Total citation count in OpenAlex
- Citations by year (recent)
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2025: 2, 2024: 1, 2023: 2Per-year citation counts (last 5 years)
- References (count)
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42Number of works referenced by this work
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-
10Other works algorithmically related by OpenAlex
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