Bycatch reduction in the deep-water shrimp (Pandalus borealis) trawl fishery by increasing codend mesh openness
In most trawl fisheries, drag forces tend to close the meshes in large areas of diamond mesh codends, negatively affecting their selective potential. In the Barents Sea deep-water shrimp (Pandalus borealis) trawl fishery, selectivity is based on a sorting grid followed by a diamond mesh codend. Howe...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Language: | English |
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Online Access: | https://hdl.handle.net/11250/2823836 https://doi.org/10.1139/cjfas-2021-0045 |
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ftimr:oai:imr.brage.unit.no:11250/2823836 2023-05-15T15:38:56+02:00 Bycatch reduction in the deep-water shrimp (Pandalus borealis) trawl fishery by increasing codend mesh openness Jacques, Nadine Cerbule, Kristine Pettersen, Hermann Herrmann, Bent Ingólfsson, Ólafur Sistiaga, Manu Berrondo Larsen, Roger B. Brinkhof, Jesse Grimaldo, Vela Eduardo Brčić, Jure Lilleng, Dagfinn 2021 application/pdf https://hdl.handle.net/11250/2823836 https://doi.org/10.1139/cjfas-2021-0045 eng eng urn:issn:0706-652X https://hdl.handle.net/11250/2823836 https://doi.org/10.1139/cjfas-2021-0045 cristin:1932314 Canadian Journal of Fisheries and Aquatic Sciences Peer reviewed Journal article 2021 ftimr https://doi.org/10.1139/cjfas-2021-0045 2021-10-20T22:36:23Z In most trawl fisheries, drag forces tend to close the meshes in large areas of diamond mesh codends, negatively affecting their selective potential. In the Barents Sea deep-water shrimp (Pandalus borealis) trawl fishery, selectivity is based on a sorting grid followed by a diamond mesh codend. However, the retention of juvenile fish as well as undersized shrimp is still a problem. In this study, we estimated the effect of applying different codend modifications, each aimed at affecting codend mesh openness and thereby selectivity. Changing from a 4-panel to a 2-panel construction of the codend did not affect size selectivity. Shortening the lastridge ropes of a 4-panel codend by 20% resulted in minor reductions for juvenile fish bycatch, but a 45% reduction of undersized shrimp was observed. Target-size catches of shrimp were nearly unaffected. When the codend mesh circumference was reduced while simultaneously shortening the lastridge ropes, the effect on catch efficiency for shrimp or juvenile fish bycatch was marginal compared to a 4-panel codend design with shortened lastridge ropes. acceptedVersion Article in Journal/Newspaper Barents Sea Pandalus borealis Institute for Marine Research: Brage IMR Barents Sea Canadian Journal of Fisheries and Aquatic Sciences |
institution |
Open Polar |
collection |
Institute for Marine Research: Brage IMR |
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ftimr |
language |
English |
description |
In most trawl fisheries, drag forces tend to close the meshes in large areas of diamond mesh codends, negatively affecting their selective potential. In the Barents Sea deep-water shrimp (Pandalus borealis) trawl fishery, selectivity is based on a sorting grid followed by a diamond mesh codend. However, the retention of juvenile fish as well as undersized shrimp is still a problem. In this study, we estimated the effect of applying different codend modifications, each aimed at affecting codend mesh openness and thereby selectivity. Changing from a 4-panel to a 2-panel construction of the codend did not affect size selectivity. Shortening the lastridge ropes of a 4-panel codend by 20% resulted in minor reductions for juvenile fish bycatch, but a 45% reduction of undersized shrimp was observed. Target-size catches of shrimp were nearly unaffected. When the codend mesh circumference was reduced while simultaneously shortening the lastridge ropes, the effect on catch efficiency for shrimp or juvenile fish bycatch was marginal compared to a 4-panel codend design with shortened lastridge ropes. acceptedVersion |
format |
Article in Journal/Newspaper |
author |
Jacques, Nadine Cerbule, Kristine Pettersen, Hermann Herrmann, Bent Ingólfsson, Ólafur Sistiaga, Manu Berrondo Larsen, Roger B. Brinkhof, Jesse Grimaldo, Vela Eduardo Brčić, Jure Lilleng, Dagfinn |
spellingShingle |
Jacques, Nadine Cerbule, Kristine Pettersen, Hermann Herrmann, Bent Ingólfsson, Ólafur Sistiaga, Manu Berrondo Larsen, Roger B. Brinkhof, Jesse Grimaldo, Vela Eduardo Brčić, Jure Lilleng, Dagfinn Bycatch reduction in the deep-water shrimp (Pandalus borealis) trawl fishery by increasing codend mesh openness |
author_facet |
Jacques, Nadine Cerbule, Kristine Pettersen, Hermann Herrmann, Bent Ingólfsson, Ólafur Sistiaga, Manu Berrondo Larsen, Roger B. Brinkhof, Jesse Grimaldo, Vela Eduardo Brčić, Jure Lilleng, Dagfinn |
author_sort |
Jacques, Nadine |
title |
Bycatch reduction in the deep-water shrimp (Pandalus borealis) trawl fishery by increasing codend mesh openness |
title_short |
Bycatch reduction in the deep-water shrimp (Pandalus borealis) trawl fishery by increasing codend mesh openness |
title_full |
Bycatch reduction in the deep-water shrimp (Pandalus borealis) trawl fishery by increasing codend mesh openness |
title_fullStr |
Bycatch reduction in the deep-water shrimp (Pandalus borealis) trawl fishery by increasing codend mesh openness |
title_full_unstemmed |
Bycatch reduction in the deep-water shrimp (Pandalus borealis) trawl fishery by increasing codend mesh openness |
title_sort |
bycatch reduction in the deep-water shrimp (pandalus borealis) trawl fishery by increasing codend mesh openness |
publishDate |
2021 |
url |
https://hdl.handle.net/11250/2823836 https://doi.org/10.1139/cjfas-2021-0045 |
geographic |
Barents Sea |
geographic_facet |
Barents Sea |
genre |
Barents Sea Pandalus borealis |
genre_facet |
Barents Sea Pandalus borealis |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences |
op_relation |
urn:issn:0706-652X https://hdl.handle.net/11250/2823836 https://doi.org/10.1139/cjfas-2021-0045 cristin:1932314 |
op_doi |
https://doi.org/10.1139/cjfas-2021-0045 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
_version_ |
1766370353017257984 |