Does the seasonal variation in fat content of blue whiting affect the acoustic conversion factor (TS) ...
No abstracts are to be cited without prior reference to the author.Blue whiting is a physoclist gadoid distributed in the Northeast Atlantic. The catches in recent years have ranged between 1-1.7 mill tonnes. The stock is currently being assessed from VPA and acoustic surveys in the spawning season....
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ASC 2002 - O - Theme session
2024
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ftdatacite:10.17895/ices.pub.25443220.v1 2024-04-28T08:32:14+00:00 Does the seasonal variation in fat content of blue whiting affect the acoustic conversion factor (TS) ... Jacobsen, Jan Arge Jákupsstovu, Stein Hjalti Í Poulsen, Marita Vang, Gudny 2024 https://dx.doi.org/10.17895/ices.pub.25443220.v1 https://ices-library.figshare.com/articles/conference_contribution/Does_the_seasonal_variation_in_fat_content_of_blue_whiting_affect_the_acoustic_conversion_factor_TS_/25443220/1 unknown ASC 2002 - O - Theme session https://ices-library.figshare.com/ICES-ASC-2002/groups https://dx.doi.org/10.17895/ices.pub.25443220 https://ices-library.figshare.com/ICES-ASC-2002/groups ICES Custom Licence https://www.ices.dk/Pages/library_policies.aspx Fisheries and aquaculture Pressures, impacts, conservation, and management article Other CreativeWork Conference contribution 2024 ftdatacite https://doi.org/10.17895/ices.pub.25443220.v110.17895/ices.pub.25443220 2024-04-02T12:00:32Z No abstracts are to be cited without prior reference to the author.Blue whiting is a physoclist gadoid distributed in the Northeast Atlantic. The catches in recent years have ranged between 1-1.7 mill tonnes. The stock is currently being assessed from VPA and acoustic surveys in the spawning season. The latter usually yielding estimates twice the size of the former. Acoustic estimates in late summer in the Norwegian Sea in the early 80's, however, yielded lower acoustic estimates compared to those obtained during the spawning season the same year. The total fat content of blue whiting varies significantly during the year. Being at a minimum in April/Mai after spawning and at a maximum in August at the height of the feeding season. The gas filled swim bladder represents most of the acoustic back scattering energy (echo) and any changes in the volume of the swim bladder would affect the echo. If it is assumed that blue whiting is at neutral buoyancy in seawater, then changes in fat content, which has a lower ... Article in Journal/Newspaper Northeast Atlantic Norwegian Sea DataCite Metadata Store (German National Library of Science and Technology) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Fisheries and aquaculture Pressures, impacts, conservation, and management |
spellingShingle |
Fisheries and aquaculture Pressures, impacts, conservation, and management Jacobsen, Jan Arge Jákupsstovu, Stein Hjalti Í Poulsen, Marita Vang, Gudny Does the seasonal variation in fat content of blue whiting affect the acoustic conversion factor (TS) ... |
topic_facet |
Fisheries and aquaculture Pressures, impacts, conservation, and management |
description |
No abstracts are to be cited without prior reference to the author.Blue whiting is a physoclist gadoid distributed in the Northeast Atlantic. The catches in recent years have ranged between 1-1.7 mill tonnes. The stock is currently being assessed from VPA and acoustic surveys in the spawning season. The latter usually yielding estimates twice the size of the former. Acoustic estimates in late summer in the Norwegian Sea in the early 80's, however, yielded lower acoustic estimates compared to those obtained during the spawning season the same year. The total fat content of blue whiting varies significantly during the year. Being at a minimum in April/Mai after spawning and at a maximum in August at the height of the feeding season. The gas filled swim bladder represents most of the acoustic back scattering energy (echo) and any changes in the volume of the swim bladder would affect the echo. If it is assumed that blue whiting is at neutral buoyancy in seawater, then changes in fat content, which has a lower ... |
format |
Article in Journal/Newspaper |
author |
Jacobsen, Jan Arge Jákupsstovu, Stein Hjalti Í Poulsen, Marita Vang, Gudny |
author_facet |
Jacobsen, Jan Arge Jákupsstovu, Stein Hjalti Í Poulsen, Marita Vang, Gudny |
author_sort |
Jacobsen, Jan Arge |
title |
Does the seasonal variation in fat content of blue whiting affect the acoustic conversion factor (TS) ... |
title_short |
Does the seasonal variation in fat content of blue whiting affect the acoustic conversion factor (TS) ... |
title_full |
Does the seasonal variation in fat content of blue whiting affect the acoustic conversion factor (TS) ... |
title_fullStr |
Does the seasonal variation in fat content of blue whiting affect the acoustic conversion factor (TS) ... |
title_full_unstemmed |
Does the seasonal variation in fat content of blue whiting affect the acoustic conversion factor (TS) ... |
title_sort |
does the seasonal variation in fat content of blue whiting affect the acoustic conversion factor (ts) ... |
publisher |
ASC 2002 - O - Theme session |
publishDate |
2024 |
url |
https://dx.doi.org/10.17895/ices.pub.25443220.v1 https://ices-library.figshare.com/articles/conference_contribution/Does_the_seasonal_variation_in_fat_content_of_blue_whiting_affect_the_acoustic_conversion_factor_TS_/25443220/1 |
genre |
Northeast Atlantic Norwegian Sea |
genre_facet |
Northeast Atlantic Norwegian Sea |
op_relation |
https://ices-library.figshare.com/ICES-ASC-2002/groups https://dx.doi.org/10.17895/ices.pub.25443220 https://ices-library.figshare.com/ICES-ASC-2002/groups |
op_rights |
ICES Custom Licence https://www.ices.dk/Pages/library_policies.aspx |
op_doi |
https://doi.org/10.17895/ices.pub.25443220.v110.17895/ices.pub.25443220 |
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1797589499707916288 |