A Comparison between Two Sonic Measuring Systems for Demersal Fish
Two sonic methods for estimation of abundance of fish stocks, the echo integrator and the digital counter methods, were compared on single and schooling fish in the Lofoten area of Norway during March 1969. Good correlation was obtained between the two systems for both situations, but the slopes of...
Published in: | Journal of the Fisheries Research Board of Canada |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Canadian Science Publishing
1970
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Online Access: | http://dx.doi.org/10.1139/f70-077 http://www.nrcresearchpress.com/doi/pdf/10.1139/f70-077 |
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crcansciencepubl:10.1139/f70-077 2023-12-17T10:33:10+01:00 A Comparison between Two Sonic Measuring Systems for Demersal Fish Dowd, R. G. Bakken, E. Nakken, O. 1970 http://dx.doi.org/10.1139/f70-077 http://www.nrcresearchpress.com/doi/pdf/10.1139/f70-077 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Journal of the Fisheries Research Board of Canada volume 27, issue 4, page 737-742 ISSN 0015-296X General Medicine journal-article 1970 crcansciencepubl https://doi.org/10.1139/f70-077 2023-11-19T13:39:15Z Two sonic methods for estimation of abundance of fish stocks, the echo integrator and the digital counter methods, were compared on single and schooling fish in the Lofoten area of Norway during March 1969. Good correlation was obtained between the two systems for both situations, but the slopes of the regressions of integrated values on the digital counter differed significantly between low and high density fish concentrations. This suggests that the two systems treated the echo information differently, but nevertheless maintained a linear relation between themselves over a wide range of counts. Article in Journal/Newspaper Lofoten Canadian Science Publishing (via Crossref) Lofoten Norway Journal of the Fisheries Research Board of Canada 27 4 737 742 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Medicine |
spellingShingle |
General Medicine Dowd, R. G. Bakken, E. Nakken, O. A Comparison between Two Sonic Measuring Systems for Demersal Fish |
topic_facet |
General Medicine |
description |
Two sonic methods for estimation of abundance of fish stocks, the echo integrator and the digital counter methods, were compared on single and schooling fish in the Lofoten area of Norway during March 1969. Good correlation was obtained between the two systems for both situations, but the slopes of the regressions of integrated values on the digital counter differed significantly between low and high density fish concentrations. This suggests that the two systems treated the echo information differently, but nevertheless maintained a linear relation between themselves over a wide range of counts. |
format |
Article in Journal/Newspaper |
author |
Dowd, R. G. Bakken, E. Nakken, O. |
author_facet |
Dowd, R. G. Bakken, E. Nakken, O. |
author_sort |
Dowd, R. G. |
title |
A Comparison between Two Sonic Measuring Systems for Demersal Fish |
title_short |
A Comparison between Two Sonic Measuring Systems for Demersal Fish |
title_full |
A Comparison between Two Sonic Measuring Systems for Demersal Fish |
title_fullStr |
A Comparison between Two Sonic Measuring Systems for Demersal Fish |
title_full_unstemmed |
A Comparison between Two Sonic Measuring Systems for Demersal Fish |
title_sort |
comparison between two sonic measuring systems for demersal fish |
publisher |
Canadian Science Publishing |
publishDate |
1970 |
url |
http://dx.doi.org/10.1139/f70-077 http://www.nrcresearchpress.com/doi/pdf/10.1139/f70-077 |
geographic |
Lofoten Norway |
geographic_facet |
Lofoten Norway |
genre |
Lofoten |
genre_facet |
Lofoten |
op_source |
Journal of the Fisheries Research Board of Canada volume 27, issue 4, page 737-742 ISSN 0015-296X |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f70-077 |
container_title |
Journal of the Fisheries Research Board of Canada |
container_volume |
27 |
container_issue |
4 |
container_start_page |
737 |
op_container_end_page |
742 |
_version_ |
1785587082324869120 |