Potential for codends with shortened lastridge ropes to replace mandated selection devices in demersal trawl fisheries
In many trawl fisheries, codend size selectivity is supplemented by adding selection devices to the gear. In the Barents Sea gadoid fishery, combining diamond mesh codends with sorting grids is compulsory. However, the use of grids increases the costs and complexity of the gear, causing discontent a...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Canadian Science Publishing
2021
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Online Access: | https://hdl.handle.net/11250/2977790 https://doi.org/10.1139/cjfas-2021-0178 |
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ftntnutrondheimi:oai:ntnuopen.ntnu.no:11250/2977790 2023-05-15T15:38:55+02:00 Potential for codends with shortened lastridge ropes to replace mandated selection devices in demersal trawl fisheries Sistiaga, Manu Brinkhof, Jesse Herrmann, Bent Larsen, Roger B. Grimaldo, Eduardo Cerbule, Kristine Brinkhof, Ilmar Jørgensen, Terje 2021 application/pdf https://hdl.handle.net/11250/2977790 https://doi.org/10.1139/cjfas-2021-0178 eng eng Canadian Science Publishing Fiskeri- og havbruksnæringens forskningsfinansiering: 901633 Canadian Journal of Fisheries and Aquatic Sciences. 2021, . urn:issn:0706-652X https://hdl.handle.net/11250/2977790 https://doi.org/10.1139/cjfas-2021-0178 cristin:1950186 41 Canadian Journal of Fisheries and Aquatic Sciences Peer reviewed Journal article 2021 ftntnutrondheimi https://doi.org/10.1139/cjfas-2021-0178 2022-02-09T23:38:20Z In many trawl fisheries, codend size selectivity is supplemented by adding selection devices to the gear. In the Barents Sea gadoid fishery, combining diamond mesh codends with sorting grids is compulsory. However, the use of grids increases the costs and complexity of the gear, causing discontent among fishermen and prompting researchers to seek alternative solutions. Lastridge ropes are ropes attached to the selvedges of the codend. In this study, we tested the effect of shortening the lastridge ropes of two diamond mesh codends with different mesh sizes on the size selectivity of cod (Gadus morhua), haddock (Melanogramus aeglefinnus), and redfish (Sebastes spp.). Shortening the lastridge ropes by 15% increased the mesh opening during the fishing process, which significantly improved the size-selective properties of the codends. Further, the L50 values were always higher for the codends in the short lastridge configuration. Therefore, codends with shortened lastridge ropes may be a simpler alternative to sorting grids in this fishery, and they may be applicable to many other fisheries in which additional selection devices are used. acceptedVersion Article in Journal/Newspaper Barents Sea Gadus morhua NTNU Open Archive (Norwegian University of Science and Technology) Barents Sea Canadian Journal of Fisheries and Aquatic Sciences 79 5 834 849 |
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Open Polar |
collection |
NTNU Open Archive (Norwegian University of Science and Technology) |
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ftntnutrondheimi |
language |
English |
description |
In many trawl fisheries, codend size selectivity is supplemented by adding selection devices to the gear. In the Barents Sea gadoid fishery, combining diamond mesh codends with sorting grids is compulsory. However, the use of grids increases the costs and complexity of the gear, causing discontent among fishermen and prompting researchers to seek alternative solutions. Lastridge ropes are ropes attached to the selvedges of the codend. In this study, we tested the effect of shortening the lastridge ropes of two diamond mesh codends with different mesh sizes on the size selectivity of cod (Gadus morhua), haddock (Melanogramus aeglefinnus), and redfish (Sebastes spp.). Shortening the lastridge ropes by 15% increased the mesh opening during the fishing process, which significantly improved the size-selective properties of the codends. Further, the L50 values were always higher for the codends in the short lastridge configuration. Therefore, codends with shortened lastridge ropes may be a simpler alternative to sorting grids in this fishery, and they may be applicable to many other fisheries in which additional selection devices are used. acceptedVersion |
format |
Article in Journal/Newspaper |
author |
Sistiaga, Manu Brinkhof, Jesse Herrmann, Bent Larsen, Roger B. Grimaldo, Eduardo Cerbule, Kristine Brinkhof, Ilmar Jørgensen, Terje |
spellingShingle |
Sistiaga, Manu Brinkhof, Jesse Herrmann, Bent Larsen, Roger B. Grimaldo, Eduardo Cerbule, Kristine Brinkhof, Ilmar Jørgensen, Terje Potential for codends with shortened lastridge ropes to replace mandated selection devices in demersal trawl fisheries |
author_facet |
Sistiaga, Manu Brinkhof, Jesse Herrmann, Bent Larsen, Roger B. Grimaldo, Eduardo Cerbule, Kristine Brinkhof, Ilmar Jørgensen, Terje |
author_sort |
Sistiaga, Manu |
title |
Potential for codends with shortened lastridge ropes to replace mandated selection devices in demersal trawl fisheries |
title_short |
Potential for codends with shortened lastridge ropes to replace mandated selection devices in demersal trawl fisheries |
title_full |
Potential for codends with shortened lastridge ropes to replace mandated selection devices in demersal trawl fisheries |
title_fullStr |
Potential for codends with shortened lastridge ropes to replace mandated selection devices in demersal trawl fisheries |
title_full_unstemmed |
Potential for codends with shortened lastridge ropes to replace mandated selection devices in demersal trawl fisheries |
title_sort |
potential for codends with shortened lastridge ropes to replace mandated selection devices in demersal trawl fisheries |
publisher |
Canadian Science Publishing |
publishDate |
2021 |
url |
https://hdl.handle.net/11250/2977790 https://doi.org/10.1139/cjfas-2021-0178 |
geographic |
Barents Sea |
geographic_facet |
Barents Sea |
genre |
Barents Sea Gadus morhua |
genre_facet |
Barents Sea Gadus morhua |
op_source |
41 Canadian Journal of Fisheries and Aquatic Sciences |
op_relation |
Fiskeri- og havbruksnæringens forskningsfinansiering: 901633 Canadian Journal of Fisheries and Aquatic Sciences. 2021, . urn:issn:0706-652X https://hdl.handle.net/11250/2977790 https://doi.org/10.1139/cjfas-2021-0178 cristin:1950186 |
op_doi |
https://doi.org/10.1139/cjfas-2021-0178 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
79 |
container_issue |
5 |
container_start_page |
834 |
op_container_end_page |
849 |
_version_ |
1766370341661179904 |