Effect of the Nordmøre grid bar spacing on size selectivity, catch efficiency and bycatch of the Barents Sea Northern shrimp fishery
The introduction of the Nordmøre grid in shrimp trawls has reduced the bycatch of non-target species. In the Norwegian Northern shrimp (Pandalus borealis) fishery, the mandatory selective gear consists of a Nordmøre grid with 19 mm bar spacing combined with a 35 mm mesh size diamond mesh codend. How...
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Online Access: | https://hdl.handle.net/11250/3042433 https://doi.org/10.1371/journal.pone.0277788 |
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ftimr:oai:imr.brage.unit.no:11250/3042433 2023-05-15T15:38:43+02:00 Effect of the Nordmøre grid bar spacing on size selectivity, catch efficiency and bycatch of the Barents Sea Northern shrimp fishery Larsen, Roger B. Herrmann, Bent Sistiaga, Manu Brinkhof, Jesse Cerbule, Kristine Grimaldo Vela, Eduardo Enrique Lomeli, Mark JM 2022 application/pdf https://hdl.handle.net/11250/3042433 https://doi.org/10.1371/journal.pone.0277788 eng eng urn:issn:1932-6203 https://hdl.handle.net/11250/3042433 https://doi.org/10.1371/journal.pone.0277788 cristin:2097910 PLOS ONE Peer reviewed Journal article 2022 ftimr https://doi.org/10.1371/journal.pone.0277788 2023-01-11T23:43:33Z The introduction of the Nordmøre grid in shrimp trawls has reduced the bycatch of non-target species. In the Norwegian Northern shrimp (Pandalus borealis) fishery, the mandatory selective gear consists of a Nordmøre grid with 19 mm bar spacing combined with a 35 mm mesh size diamond mesh codend. However, fish bycatch in shrimp trawls remains a challenge and further modifications of the gear that can improve selectivity are still sought. Therefore, this study estimated and compared the size selectivity of Nordmøre grids with bar spacings of 17 and 21 mm. Further, the effect of applying these two grids on trawl size selectivity was predicted and compared to the legislated gear configuration. Experimental fishing trials were conducted in the Barents Sea where the bottom trawl fleet targets Northern shrimp. Results were obtained for the target species and two by-catch species: cod (Gadus morhua) and American plaice (Hippoglossoides platessoides). This study demonstrated that reducing bar spacing can significantly reduce fish bycatch while only marginally affecting catch efficiency of Northern shrimp. This is a potentially important finding from a management perspective that could be applicable to other shrimp fisheries where flexibility in the use of different grid bar spacings may be beneficial to maximize the reduction of unwanted bycatch while minimizing the loss of target species. publishedVersion Article in Journal/Newspaper Barents Sea Gadus morhua northern shrimp Pandalus borealis Institute for Marine Research: Brage IMR Barents Sea Nordmøre ENVELOPE(8.500,8.500,63.000,63.000) PLOS ONE 17 12 e0277788 |
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Open Polar |
collection |
Institute for Marine Research: Brage IMR |
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ftimr |
language |
English |
description |
The introduction of the Nordmøre grid in shrimp trawls has reduced the bycatch of non-target species. In the Norwegian Northern shrimp (Pandalus borealis) fishery, the mandatory selective gear consists of a Nordmøre grid with 19 mm bar spacing combined with a 35 mm mesh size diamond mesh codend. However, fish bycatch in shrimp trawls remains a challenge and further modifications of the gear that can improve selectivity are still sought. Therefore, this study estimated and compared the size selectivity of Nordmøre grids with bar spacings of 17 and 21 mm. Further, the effect of applying these two grids on trawl size selectivity was predicted and compared to the legislated gear configuration. Experimental fishing trials were conducted in the Barents Sea where the bottom trawl fleet targets Northern shrimp. Results were obtained for the target species and two by-catch species: cod (Gadus morhua) and American plaice (Hippoglossoides platessoides). This study demonstrated that reducing bar spacing can significantly reduce fish bycatch while only marginally affecting catch efficiency of Northern shrimp. This is a potentially important finding from a management perspective that could be applicable to other shrimp fisheries where flexibility in the use of different grid bar spacings may be beneficial to maximize the reduction of unwanted bycatch while minimizing the loss of target species. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Larsen, Roger B. Herrmann, Bent Sistiaga, Manu Brinkhof, Jesse Cerbule, Kristine Grimaldo Vela, Eduardo Enrique Lomeli, Mark JM |
spellingShingle |
Larsen, Roger B. Herrmann, Bent Sistiaga, Manu Brinkhof, Jesse Cerbule, Kristine Grimaldo Vela, Eduardo Enrique Lomeli, Mark JM Effect of the Nordmøre grid bar spacing on size selectivity, catch efficiency and bycatch of the Barents Sea Northern shrimp fishery |
author_facet |
Larsen, Roger B. Herrmann, Bent Sistiaga, Manu Brinkhof, Jesse Cerbule, Kristine Grimaldo Vela, Eduardo Enrique Lomeli, Mark JM |
author_sort |
Larsen, Roger B. |
title |
Effect of the Nordmøre grid bar spacing on size selectivity, catch efficiency and bycatch of the Barents Sea Northern shrimp fishery |
title_short |
Effect of the Nordmøre grid bar spacing on size selectivity, catch efficiency and bycatch of the Barents Sea Northern shrimp fishery |
title_full |
Effect of the Nordmøre grid bar spacing on size selectivity, catch efficiency and bycatch of the Barents Sea Northern shrimp fishery |
title_fullStr |
Effect of the Nordmøre grid bar spacing on size selectivity, catch efficiency and bycatch of the Barents Sea Northern shrimp fishery |
title_full_unstemmed |
Effect of the Nordmøre grid bar spacing on size selectivity, catch efficiency and bycatch of the Barents Sea Northern shrimp fishery |
title_sort |
effect of the nordmøre grid bar spacing on size selectivity, catch efficiency and bycatch of the barents sea northern shrimp fishery |
publishDate |
2022 |
url |
https://hdl.handle.net/11250/3042433 https://doi.org/10.1371/journal.pone.0277788 |
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 northern shrimp Pandalus borealis |
genre_facet |
Barents Sea Gadus morhua northern shrimp Pandalus borealis |
op_source |
PLOS ONE |
op_relation |
urn:issn:1932-6203 https://hdl.handle.net/11250/3042433 https://doi.org/10.1371/journal.pone.0277788 cristin:2097910 |
op_doi |
https://doi.org/10.1371/journal.pone.0277788 |
container_title |
PLOS ONE |
container_volume |
17 |
container_issue |
12 |
container_start_page |
e0277788 |
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1766369987409215488 |