Mass estimates of individual gas-bearing mesopelagic fish from in situ wideband acoustic measurements ground-truthed by biological net sampling
Abstract A new acoustic approach to estimate the mass of individual gas-bearing fish at their resident depth at more than 400 m was tested on Cyclothone spp.. Cyclothone are small and slender, and possibly numerically underestimated globally as individuals can pass through trawl meshes. A towed inst...
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Oxford University Press (OUP)
2021
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Online Access: | http://dx.doi.org/10.1093/icesjms/fsab207 https://academic.oup.com/icesjms/article-pdf/78/10/3658/41772325/fsab207.pdf |
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croxfordunivpr:10.1093/icesjms/fsab207 2024-03-17T08:59:24+00:00 Mass estimates of individual gas-bearing mesopelagic fish from in situ wideband acoustic measurements ground-truthed by biological net sampling Agersted, Mette Dalgaard Khodabandeloo, Babak Klevjer, Thor A García-Seoane, Eva Strand, Espen Underwood, Melanie J Melle, Webjørn Proud, Roland Research Council of Norway MEESO EU H2020 2021 http://dx.doi.org/10.1093/icesjms/fsab207 https://academic.oup.com/icesjms/article-pdf/78/10/3658/41772325/fsab207.pdf en eng Oxford University Press (OUP) https://creativecommons.org/licenses/by/4.0/ ICES Journal of Marine Science volume 78, issue 10, page 3658-3673 ISSN 1054-3139 1095-9289 Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2021 croxfordunivpr https://doi.org/10.1093/icesjms/fsab207 2024-02-20T00:11:16Z Abstract A new acoustic approach to estimate the mass of individual gas-bearing fish at their resident depth at more than 400 m was tested on Cyclothone spp.. Cyclothone are small and slender, and possibly numerically underestimated globally as individuals can pass through trawl meshes. A towed instrumented platform was used at one sampling station in the Northeast Atlantic, where Cyclothone spp. dominated numerically in net catches, to measure in situ acoustic wideband target strength (TS) spectra, i.e. acoustic scattering response of a given organism (”target”) over a frequency range (here, 38 + 50–260 kHz). Fitting a viscous–elastic scattering model to TS spectra of single targets resulted in swimbladder volume estimates from where individual mass was estimated by assuming neutral buoyancy for a given flesh density, such that fish average density equals that of surrounding water. A density contrast (between fish flesh and seawater) of 1.020 resulted in similar mass–frequency distribution of fish estimated from acoustics/model and Cyclothone spp. caught in nets. The presented proof of concept has the potential to obtain relationships between TS and mass of individual gas-bearing mesopelagic fish in general. Article in Journal/Newspaper Northeast Atlantic Oxford University Press ICES Journal of Marine Science 78 10 3658 3673 |
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Open Polar |
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Oxford University Press |
op_collection_id |
croxfordunivpr |
language |
English |
topic |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
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Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography Agersted, Mette Dalgaard Khodabandeloo, Babak Klevjer, Thor A García-Seoane, Eva Strand, Espen Underwood, Melanie J Melle, Webjørn Mass estimates of individual gas-bearing mesopelagic fish from in situ wideband acoustic measurements ground-truthed by biological net sampling |
topic_facet |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract A new acoustic approach to estimate the mass of individual gas-bearing fish at their resident depth at more than 400 m was tested on Cyclothone spp.. Cyclothone are small and slender, and possibly numerically underestimated globally as individuals can pass through trawl meshes. A towed instrumented platform was used at one sampling station in the Northeast Atlantic, where Cyclothone spp. dominated numerically in net catches, to measure in situ acoustic wideband target strength (TS) spectra, i.e. acoustic scattering response of a given organism (”target”) over a frequency range (here, 38 + 50–260 kHz). Fitting a viscous–elastic scattering model to TS spectra of single targets resulted in swimbladder volume estimates from where individual mass was estimated by assuming neutral buoyancy for a given flesh density, such that fish average density equals that of surrounding water. A density contrast (between fish flesh and seawater) of 1.020 resulted in similar mass–frequency distribution of fish estimated from acoustics/model and Cyclothone spp. caught in nets. The presented proof of concept has the potential to obtain relationships between TS and mass of individual gas-bearing mesopelagic fish in general. |
author2 |
Proud, Roland Research Council of Norway MEESO EU H2020 |
format |
Article in Journal/Newspaper |
author |
Agersted, Mette Dalgaard Khodabandeloo, Babak Klevjer, Thor A García-Seoane, Eva Strand, Espen Underwood, Melanie J Melle, Webjørn |
author_facet |
Agersted, Mette Dalgaard Khodabandeloo, Babak Klevjer, Thor A García-Seoane, Eva Strand, Espen Underwood, Melanie J Melle, Webjørn |
author_sort |
Agersted, Mette Dalgaard |
title |
Mass estimates of individual gas-bearing mesopelagic fish from in situ wideband acoustic measurements ground-truthed by biological net sampling |
title_short |
Mass estimates of individual gas-bearing mesopelagic fish from in situ wideband acoustic measurements ground-truthed by biological net sampling |
title_full |
Mass estimates of individual gas-bearing mesopelagic fish from in situ wideband acoustic measurements ground-truthed by biological net sampling |
title_fullStr |
Mass estimates of individual gas-bearing mesopelagic fish from in situ wideband acoustic measurements ground-truthed by biological net sampling |
title_full_unstemmed |
Mass estimates of individual gas-bearing mesopelagic fish from in situ wideband acoustic measurements ground-truthed by biological net sampling |
title_sort |
mass estimates of individual gas-bearing mesopelagic fish from in situ wideband acoustic measurements ground-truthed by biological net sampling |
publisher |
Oxford University Press (OUP) |
publishDate |
2021 |
url |
http://dx.doi.org/10.1093/icesjms/fsab207 https://academic.oup.com/icesjms/article-pdf/78/10/3658/41772325/fsab207.pdf |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_source |
ICES Journal of Marine Science volume 78, issue 10, page 3658-3673 ISSN 1054-3139 1095-9289 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1093/icesjms/fsab207 |
container_title |
ICES Journal of Marine Science |
container_volume |
78 |
container_issue |
10 |
container_start_page |
3658 |
op_container_end_page |
3673 |
_version_ |
1793769908911210496 |