Used vs. new: Does it have consequences for the performance of fishing gear?
Sea trials to test size selectivity equipment in trawls are often limited in time because they are costly, and the results can be influenced by multiple factors that are often overlooked. In the Barents Sea gadoid trawl fishery, the use of a size sorting grid in front of the codend is compulsory. Th...
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2023
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Online Access: | https://hdl.handle.net/11250/3083849 https://doi.org/10.1016/j.aaf.2023.03.003 |
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ftsintef:oai:sintef.brage.unit.no:11250/3083849 2023-09-05T13:18:25+02:00 Used vs. new: Does it have consequences for the performance of fishing gear? Sistiaga, Manu Jørgensen, Terje Brinkhof, Ilmar Herrmann, Bent Brinkhof, Jesse 2023 application/pdf https://hdl.handle.net/11250/3083849 https://doi.org/10.1016/j.aaf.2023.03.003 eng eng KeAi communications Aquaculture and Fisheries. 2023, . urn:issn:2468-550X https://hdl.handle.net/11250/3083849 https://doi.org/10.1016/j.aaf.2023.03.003 cristin:2153093 Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal http://creativecommons.org/licenses/by-nc-nd/4.0/deed.no © 2023 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY NC ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). 0 Aquaculture and Fisheries Size selectivity Sorting grid Codend Barents sea Cod Demersal trawl Journal article Peer reviewed 2023 ftsintef https://doi.org/10.1016/j.aaf.2023.03.003 2023-08-16T22:47:14Z Sea trials to test size selectivity equipment in trawls are often limited in time because they are costly, and the results can be influenced by multiple factors that are often overlooked. In the Barents Sea gadoid trawl fishery, the use of a size sorting grid in front of the codend is compulsory. The flexigrid, a netting section containing two flexible grids, is the most widely used grid section in this fishery. However, earlier selectivity studies with this device have shown inconclusive results. It has been speculated that the differences observed resulted from the difference in age and usage of the grid sections in the studies compared. To reveal whether potential changes in the device construction over time can lead to differences in size selection properties, we performed comparative fishing trials where we compared a brand new flexigrid section and a well-used flexigrid section used continuously by a commercial trawler for approximately four years. The results showed that the new flexigrid released significantly more cod below ∼60 cm than the used flexigrid. However, when the grids were fished with a subsequent diamond mesh codend, there was no difference in the overall selectivity of the two gears, meaning that the size selectivity in the codend compensates for the potential reduction in selectivity performance of the grids. This study shows the importance of considering the age and earlier use of size selection devices like sorting grids before they are compared with other devices, as their size selection properties can change significantly over time and with use. publishedVersion Article in Journal/Newspaper Barents Sea SINTEF Open (Brage) Barents Sea Aquaculture and Fisheries |
institution |
Open Polar |
collection |
SINTEF Open (Brage) |
op_collection_id |
ftsintef |
language |
English |
topic |
Size selectivity Sorting grid Codend Barents sea Cod Demersal trawl |
spellingShingle |
Size selectivity Sorting grid Codend Barents sea Cod Demersal trawl Sistiaga, Manu Jørgensen, Terje Brinkhof, Ilmar Herrmann, Bent Brinkhof, Jesse Used vs. new: Does it have consequences for the performance of fishing gear? |
topic_facet |
Size selectivity Sorting grid Codend Barents sea Cod Demersal trawl |
description |
Sea trials to test size selectivity equipment in trawls are often limited in time because they are costly, and the results can be influenced by multiple factors that are often overlooked. In the Barents Sea gadoid trawl fishery, the use of a size sorting grid in front of the codend is compulsory. The flexigrid, a netting section containing two flexible grids, is the most widely used grid section in this fishery. However, earlier selectivity studies with this device have shown inconclusive results. It has been speculated that the differences observed resulted from the difference in age and usage of the grid sections in the studies compared. To reveal whether potential changes in the device construction over time can lead to differences in size selection properties, we performed comparative fishing trials where we compared a brand new flexigrid section and a well-used flexigrid section used continuously by a commercial trawler for approximately four years. The results showed that the new flexigrid released significantly more cod below ∼60 cm than the used flexigrid. However, when the grids were fished with a subsequent diamond mesh codend, there was no difference in the overall selectivity of the two gears, meaning that the size selectivity in the codend compensates for the potential reduction in selectivity performance of the grids. This study shows the importance of considering the age and earlier use of size selection devices like sorting grids before they are compared with other devices, as their size selection properties can change significantly over time and with use. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Sistiaga, Manu Jørgensen, Terje Brinkhof, Ilmar Herrmann, Bent Brinkhof, Jesse |
author_facet |
Sistiaga, Manu Jørgensen, Terje Brinkhof, Ilmar Herrmann, Bent Brinkhof, Jesse |
author_sort |
Sistiaga, Manu |
title |
Used vs. new: Does it have consequences for the performance of fishing gear? |
title_short |
Used vs. new: Does it have consequences for the performance of fishing gear? |
title_full |
Used vs. new: Does it have consequences for the performance of fishing gear? |
title_fullStr |
Used vs. new: Does it have consequences for the performance of fishing gear? |
title_full_unstemmed |
Used vs. new: Does it have consequences for the performance of fishing gear? |
title_sort |
used vs. new: does it have consequences for the performance of fishing gear? |
publisher |
KeAi communications |
publishDate |
2023 |
url |
https://hdl.handle.net/11250/3083849 https://doi.org/10.1016/j.aaf.2023.03.003 |
geographic |
Barents Sea |
geographic_facet |
Barents Sea |
genre |
Barents Sea |
genre_facet |
Barents Sea |
op_source |
0 Aquaculture and Fisheries |
op_relation |
Aquaculture and Fisheries. 2023, . urn:issn:2468-550X https://hdl.handle.net/11250/3083849 https://doi.org/10.1016/j.aaf.2023.03.003 cristin:2153093 |
op_rights |
Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal http://creativecommons.org/licenses/by-nc-nd/4.0/deed.no © 2023 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY NC ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
op_doi |
https://doi.org/10.1016/j.aaf.2023.03.003 |
container_title |
Aquaculture and Fisheries |
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1776199380935639040 |