Can the precision of bottom trawl indices be increased by using simultaneously collected acoustic data? The Barents Sea experience
Acoustic data are recorded continuously during the winter survey for demersal fish in the Barents Sea. This paper presents a method for using the information from the acoustic recordings between trawl stations in an attempt to increase the precision of the trawl estimate. The method is related to th...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Online Access: | http://dx.doi.org/10.1139/f07-101 http://www.nrcresearchpress.com/doi/pdf/10.1139/f07-101 |
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crcansciencepubl:10.1139/f07-101 2023-12-17T10:27:49+01:00 Can the precision of bottom trawl indices be increased by using simultaneously collected acoustic data? The Barents Sea experience Hjellvik, Vidar Tjøstheim, Dag Godø, Olav Rune 2007 http://dx.doi.org/10.1139/f07-101 http://www.nrcresearchpress.com/doi/pdf/10.1139/f07-101 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 64, issue 10, page 1390-1402 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 2007 crcansciencepubl https://doi.org/10.1139/f07-101 2023-11-19T13:38:34Z Acoustic data are recorded continuously during the winter survey for demersal fish in the Barents Sea. This paper presents a method for using the information from the acoustic recordings between trawl stations in an attempt to increase the precision of the trawl estimate. The method is related to the double-sampling regression estimation, in which information from a frequently sampled auxiliary variable (e.g., acoustics) that is correlated with the main variable (e.g., trawl) is used for the purpose of increasing the precision in the estimate of the population mean of the main variable. The version presented here allows for additional explanatory variables and for autocorrelation in the main and auxiliary variables. However, when applied to the Barents Sea data, only a minor variance reduction is obtained. The main reasons for this are a high autocorrelation in the acoustic data and a relatively low correlation between trawl and acoustics on trawl stations. Another unexpected result is that the acoustic density during trawling is significantly higher than between trawl stations. Article in Journal/Newspaper Barents Sea Canadian Science Publishing (via Crossref) Barents Sea Canadian Journal of Fisheries and Aquatic Sciences 64 10 1390 1402 |
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Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
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crcansciencepubl |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Hjellvik, Vidar Tjøstheim, Dag Godø, Olav Rune Can the precision of bottom trawl indices be increased by using simultaneously collected acoustic data? The Barents Sea experience |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Acoustic data are recorded continuously during the winter survey for demersal fish in the Barents Sea. This paper presents a method for using the information from the acoustic recordings between trawl stations in an attempt to increase the precision of the trawl estimate. The method is related to the double-sampling regression estimation, in which information from a frequently sampled auxiliary variable (e.g., acoustics) that is correlated with the main variable (e.g., trawl) is used for the purpose of increasing the precision in the estimate of the population mean of the main variable. The version presented here allows for additional explanatory variables and for autocorrelation in the main and auxiliary variables. However, when applied to the Barents Sea data, only a minor variance reduction is obtained. The main reasons for this are a high autocorrelation in the acoustic data and a relatively low correlation between trawl and acoustics on trawl stations. Another unexpected result is that the acoustic density during trawling is significantly higher than between trawl stations. |
format |
Article in Journal/Newspaper |
author |
Hjellvik, Vidar Tjøstheim, Dag Godø, Olav Rune |
author_facet |
Hjellvik, Vidar Tjøstheim, Dag Godø, Olav Rune |
author_sort |
Hjellvik, Vidar |
title |
Can the precision of bottom trawl indices be increased by using simultaneously collected acoustic data? The Barents Sea experience |
title_short |
Can the precision of bottom trawl indices be increased by using simultaneously collected acoustic data? The Barents Sea experience |
title_full |
Can the precision of bottom trawl indices be increased by using simultaneously collected acoustic data? The Barents Sea experience |
title_fullStr |
Can the precision of bottom trawl indices be increased by using simultaneously collected acoustic data? The Barents Sea experience |
title_full_unstemmed |
Can the precision of bottom trawl indices be increased by using simultaneously collected acoustic data? The Barents Sea experience |
title_sort |
can the precision of bottom trawl indices be increased by using simultaneously collected acoustic data? the barents sea experience |
publisher |
Canadian Science Publishing |
publishDate |
2007 |
url |
http://dx.doi.org/10.1139/f07-101 http://www.nrcresearchpress.com/doi/pdf/10.1139/f07-101 |
geographic |
Barents Sea |
geographic_facet |
Barents Sea |
genre |
Barents Sea |
genre_facet |
Barents Sea |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 64, issue 10, page 1390-1402 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f07-101 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
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64 |
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10 |
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1390 |
op_container_end_page |
1402 |
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1785579744366952448 |