Effect of three different codend designs on the size selectivity of juvenile cod in the Barents Sea shrimp trawl fishery
Shrimp trawlers often use a Nordmøre sorting grid ahead of a small mesh codend to avoid bycatch of juvenile fish while allowing shrimps to be efficiently caught. However, small fish can pass through the grid to enter the codend and risk being retained. The risk of retention for fish of different siz...
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Online Access: | http://hdl.handle.net/11250/2607141 https://doi.org/10.1016/j.fishres.2019.105337 |
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ftsintef:oai:sintef.brage.unit.no:11250/2607141 2023-05-15T15:38:45+02:00 Effect of three different codend designs on the size selectivity of juvenile cod in the Barents Sea shrimp trawl fishery Herrmann, Bent Sistiaga, Manu Berrondo Larsen, Roger B. Brinkhof, Jesse 2019-11 application/pdf http://hdl.handle.net/11250/2607141 https://doi.org/10.1016/j.fishres.2019.105337 eng eng Elsevier Fisheries Research, Volume 219 urn:issn:0165-7836 http://hdl.handle.net/11250/2607141 https://doi.org/10.1016/j.fishres.2019.105337 cristin:1713674 Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal http://creativecommons.org/licenses/by-nc-nd/4.0/deed.no © 2019 The Author(s). Published by Elsevier B.V. CC-BY-NC-ND 219 Fisheries Research 105337 Shrimp fishery Bycatch Cod Size selectivity Nordmøre grid Codend design Journal article Peer reviewed 2019 ftsintef https://doi.org/10.1016/j.fishres.2019.105337 2021-08-04T12:00:18Z Shrimp trawlers often use a Nordmøre sorting grid ahead of a small mesh codend to avoid bycatch of juvenile fish while allowing shrimps to be efficiently caught. However, small fish can pass through the grid to enter the codend and risk being retained. The risk of retention for fish of different sizes depends the size selection in the Nordmøre grid and the size selection in the subsequent codend, which makes the process complex and often results in a bell-shaped size selection curve. In the Barents Sea shrimp fishery, cod (Gadus morhua) is one of the species of concern because of its great commercial value. We studied the size selection of juvenile cod when the trawl was equipped with the compulsory gear in the fishery: a 19 mm Nordmøre grid followed by a 35 mm diamond mesh codend. As expected, the size selection curve showed a bell-shaped signature, with a certain size range of juveniles having high retention risk, while the risk for smaller and bigger cod was smaller. The retention risk was highest for cod between 12 and 20 cm in length. We also tested two alternative designs in the aft section of the gear: a codend with 35 mm square mesh panels and a square mesh sorting cone section. Neither of these designs affected the size selection in the trawl significantly. publishedVersion Article in Journal/Newspaper Barents Sea Gadus morhua SINTEF Open (Brage) Barents Sea Nordmøre ENVELOPE(8.500,8.500,63.000,63.000) Fisheries Research 219 105337 |
institution |
Open Polar |
collection |
SINTEF Open (Brage) |
op_collection_id |
ftsintef |
language |
English |
topic |
Shrimp fishery Bycatch Cod Size selectivity Nordmøre grid Codend design |
spellingShingle |
Shrimp fishery Bycatch Cod Size selectivity Nordmøre grid Codend design Herrmann, Bent Sistiaga, Manu Berrondo Larsen, Roger B. Brinkhof, Jesse Effect of three different codend designs on the size selectivity of juvenile cod in the Barents Sea shrimp trawl fishery |
topic_facet |
Shrimp fishery Bycatch Cod Size selectivity Nordmøre grid Codend design |
description |
Shrimp trawlers often use a Nordmøre sorting grid ahead of a small mesh codend to avoid bycatch of juvenile fish while allowing shrimps to be efficiently caught. However, small fish can pass through the grid to enter the codend and risk being retained. The risk of retention for fish of different sizes depends the size selection in the Nordmøre grid and the size selection in the subsequent codend, which makes the process complex and often results in a bell-shaped size selection curve. In the Barents Sea shrimp fishery, cod (Gadus morhua) is one of the species of concern because of its great commercial value. We studied the size selection of juvenile cod when the trawl was equipped with the compulsory gear in the fishery: a 19 mm Nordmøre grid followed by a 35 mm diamond mesh codend. As expected, the size selection curve showed a bell-shaped signature, with a certain size range of juveniles having high retention risk, while the risk for smaller and bigger cod was smaller. The retention risk was highest for cod between 12 and 20 cm in length. We also tested two alternative designs in the aft section of the gear: a codend with 35 mm square mesh panels and a square mesh sorting cone section. Neither of these designs affected the size selection in the trawl significantly. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Herrmann, Bent Sistiaga, Manu Berrondo Larsen, Roger B. Brinkhof, Jesse |
author_facet |
Herrmann, Bent Sistiaga, Manu Berrondo Larsen, Roger B. Brinkhof, Jesse |
author_sort |
Herrmann, Bent |
title |
Effect of three different codend designs on the size selectivity of juvenile cod in the Barents Sea shrimp trawl fishery |
title_short |
Effect of three different codend designs on the size selectivity of juvenile cod in the Barents Sea shrimp trawl fishery |
title_full |
Effect of three different codend designs on the size selectivity of juvenile cod in the Barents Sea shrimp trawl fishery |
title_fullStr |
Effect of three different codend designs on the size selectivity of juvenile cod in the Barents Sea shrimp trawl fishery |
title_full_unstemmed |
Effect of three different codend designs on the size selectivity of juvenile cod in the Barents Sea shrimp trawl fishery |
title_sort |
effect of three different codend designs on the size selectivity of juvenile cod in the barents sea shrimp trawl fishery |
publisher |
Elsevier |
publishDate |
2019 |
url |
http://hdl.handle.net/11250/2607141 https://doi.org/10.1016/j.fishres.2019.105337 |
long_lat |
ENVELOPE(8.500,8.500,63.000,63.000) |
geographic |
Barents Sea Nordmøre |
geographic_facet |
Barents Sea Nordmøre |
genre |
Barents Sea Gadus morhua |
genre_facet |
Barents Sea Gadus morhua |
op_source |
219 Fisheries Research 105337 |
op_relation |
Fisheries Research, Volume 219 urn:issn:0165-7836 http://hdl.handle.net/11250/2607141 https://doi.org/10.1016/j.fishres.2019.105337 cristin:1713674 |
op_rights |
Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal http://creativecommons.org/licenses/by-nc-nd/4.0/deed.no © 2019 The Author(s). Published by Elsevier B.V. |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1016/j.fishres.2019.105337 |
container_title |
Fisheries Research |
container_volume |
219 |
container_start_page |
105337 |
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1766370030219427840 |