The reactions of shoaling adult cod to a pelagic trawl: implications for commercial trawling
Abstract Rosen, S., Engås, A., Fernö, A., and Jörgensen, T. 2012. The reactions of shoaling adult cod to a pelagic trawl: implications for commercial trawling. – ICES Journal of Marine Science, 69: 303–312. The reactions of shoaling adult Atlantic cod to a pelagic trawl were measured during fishing...
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Language: | English |
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Online Access: | http://dx.doi.org/10.1093/icesjms/fsr199 http://academic.oup.com/icesjms/article-pdf/69/2/303/29141331/fsr199.pdf |
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croxfordunivpr:10.1093/icesjms/fsr199 2024-06-23T07:51:06+00:00 The reactions of shoaling adult cod to a pelagic trawl: implications for commercial trawling Rosen, Shale Engås, Arill Fernö, Anders Jörgensen, Terje 2012 http://dx.doi.org/10.1093/icesjms/fsr199 http://academic.oup.com/icesjms/article-pdf/69/2/303/29141331/fsr199.pdf en eng Oxford University Press (OUP) ICES Journal of Marine Science volume 69, issue 2, page 303-312 ISSN 1095-9289 1054-3139 journal-article 2012 croxfordunivpr https://doi.org/10.1093/icesjms/fsr199 2024-06-04T06:14:27Z Abstract Rosen, S., Engås, A., Fernö, A., and Jörgensen, T. 2012. The reactions of shoaling adult cod to a pelagic trawl: implications for commercial trawling. – ICES Journal of Marine Science, 69: 303–312. The reactions of shoaling adult Atlantic cod to a pelagic trawl were measured during fishing off the north coast of Norway. Cod remaining in the trawl track dived at rates as fast as 0.35 m s−1 following vessel passage and swam away from the vessel, in the direction of the approaching trawl, at an average rate of 0.6 m s−1. They did not attempt to swim ahead of the trawl as documented previously, but passed into the lower half of the trawl entrance and swam slowly in the direction of trawling at a rate of 0.2–0.5 m s−1 as the trawl's greater speed through water carried them deeper into the trawl. Shoals compressed vertically once inside the trawl, suggesting that packing density increased at least fourfold. Fish remained in the lower part of the trawl as they moved through its tapered section towards the codend, with little to no clearance above the bottom panel, but significant clearance beneath the top panel. Catches were sufficient to support commercial harvest, and the behaviour observed suggests that changes in trawl design and fishing strategy might improve fuel economy and species selectivity. Article in Journal/Newspaper atlantic cod Oxford University Press Engås ENVELOPE(13.926,13.926,65.705,65.705) Norway ICES Journal of Marine Science 69 2 303 312 |
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Oxford University Press |
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croxfordunivpr |
language |
English |
description |
Abstract Rosen, S., Engås, A., Fernö, A., and Jörgensen, T. 2012. The reactions of shoaling adult cod to a pelagic trawl: implications for commercial trawling. – ICES Journal of Marine Science, 69: 303–312. The reactions of shoaling adult Atlantic cod to a pelagic trawl were measured during fishing off the north coast of Norway. Cod remaining in the trawl track dived at rates as fast as 0.35 m s−1 following vessel passage and swam away from the vessel, in the direction of the approaching trawl, at an average rate of 0.6 m s−1. They did not attempt to swim ahead of the trawl as documented previously, but passed into the lower half of the trawl entrance and swam slowly in the direction of trawling at a rate of 0.2–0.5 m s−1 as the trawl's greater speed through water carried them deeper into the trawl. Shoals compressed vertically once inside the trawl, suggesting that packing density increased at least fourfold. Fish remained in the lower part of the trawl as they moved through its tapered section towards the codend, with little to no clearance above the bottom panel, but significant clearance beneath the top panel. Catches were sufficient to support commercial harvest, and the behaviour observed suggests that changes in trawl design and fishing strategy might improve fuel economy and species selectivity. |
format |
Article in Journal/Newspaper |
author |
Rosen, Shale Engås, Arill Fernö, Anders Jörgensen, Terje |
spellingShingle |
Rosen, Shale Engås, Arill Fernö, Anders Jörgensen, Terje The reactions of shoaling adult cod to a pelagic trawl: implications for commercial trawling |
author_facet |
Rosen, Shale Engås, Arill Fernö, Anders Jörgensen, Terje |
author_sort |
Rosen, Shale |
title |
The reactions of shoaling adult cod to a pelagic trawl: implications for commercial trawling |
title_short |
The reactions of shoaling adult cod to a pelagic trawl: implications for commercial trawling |
title_full |
The reactions of shoaling adult cod to a pelagic trawl: implications for commercial trawling |
title_fullStr |
The reactions of shoaling adult cod to a pelagic trawl: implications for commercial trawling |
title_full_unstemmed |
The reactions of shoaling adult cod to a pelagic trawl: implications for commercial trawling |
title_sort |
reactions of shoaling adult cod to a pelagic trawl: implications for commercial trawling |
publisher |
Oxford University Press (OUP) |
publishDate |
2012 |
url |
http://dx.doi.org/10.1093/icesjms/fsr199 http://academic.oup.com/icesjms/article-pdf/69/2/303/29141331/fsr199.pdf |
long_lat |
ENVELOPE(13.926,13.926,65.705,65.705) |
geographic |
Engås Norway |
geographic_facet |
Engås Norway |
genre |
atlantic cod |
genre_facet |
atlantic cod |
op_source |
ICES Journal of Marine Science volume 69, issue 2, page 303-312 ISSN 1095-9289 1054-3139 |
op_doi |
https://doi.org/10.1093/icesjms/fsr199 |
container_title |
ICES Journal of Marine Science |
container_volume |
69 |
container_issue |
2 |
container_start_page |
303 |
op_container_end_page |
312 |
_version_ |
1802642096175185920 |