The reactions of shoaling adult cod to a pelagic trawl: implications for commercial trawling
<qd> 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. </qd>The reactions of shoaling adult Atlantic cod to a pelagic trawl were measured du...
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fthighwire:oai:open-archive.highwire.org:icesjms:69/2/303 2023-05-15T15:27:38+02:00 The reactions of shoaling adult cod to a pelagic trawl: implications for commercial trawling Rosen, Shale Engås, Arill Fernö, Anders Jörgensen, Terje 2012-03-01 00:00:00.0 text/html http://icesjms.oxfordjournals.org/cgi/content/short/69/2/303 https://doi.org/10.1093/icesjms/fsr199 en eng Oxford University Press http://icesjms.oxfordjournals.org/cgi/content/short/69/2/303 http://dx.doi.org/10.1093/icesjms/fsr199 Copyright (C) 2012, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer Articles TEXT 2012 fthighwire https://doi.org/10.1093/icesjms/fsr199 2012-03-03T13:36:34Z <qd> 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. </qd>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. Text atlantic cod HighWire Press (Stanford University) Norway Engås ENVELOPE(13.926,13.926,65.705,65.705) ICES Journal of Marine Science 69 2 303 312 |
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Articles Rosen, Shale Engås, Arill Fernö, Anders Jörgensen, Terje The reactions of shoaling adult cod to a pelagic trawl: implications for commercial trawling |
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<qd> 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. </qd>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 |
Text |
author |
Rosen, Shale Engås, Arill Fernö, Anders Jörgensen, Terje |
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 |
publishDate |
2012 |
url |
http://icesjms.oxfordjournals.org/cgi/content/short/69/2/303 https://doi.org/10.1093/icesjms/fsr199 |
long_lat |
ENVELOPE(13.926,13.926,65.705,65.705) |
geographic |
Norway Engås |
geographic_facet |
Norway Engås |
genre |
atlantic cod |
genre_facet |
atlantic cod |
op_relation |
http://icesjms.oxfordjournals.org/cgi/content/short/69/2/303 http://dx.doi.org/10.1093/icesjms/fsr199 |
op_rights |
Copyright (C) 2012, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer |
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 |
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1766358055494090752 |