Quantification of bell-shaped size selectivity in shrimp trawl fisheries using square mesh panels and a sorting cone after a Nordmøre grid.
Shrimp trawlers in the Barents Sea use a Nordmøre sorting grid ahead of a small-mesh codend to avoid bycatch while catching shrimps efficiently. However, small fish can still pass through the grid to enter the codend, which increases their risk of being retained. In this study, we quantified the sel...
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ftdoajarticles:oai:doaj.org/article:0bbaf29dbd2f4b019cb2afc52ae3fd05 2023-05-15T15:39:05+02:00 Quantification of bell-shaped size selectivity in shrimp trawl fisheries using square mesh panels and a sorting cone after a Nordmøre grid. Manu Sistiaga Bent Herrmann Roger Bertrand Larsen Jesse Brinkhof 2019-01-01T00:00:00Z https://doi.org/10.1371/journal.pone.0222391 https://doaj.org/article/0bbaf29dbd2f4b019cb2afc52ae3fd05 EN eng Public Library of Science (PLoS) https://doi.org/10.1371/journal.pone.0222391 https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0222391 https://doaj.org/article/0bbaf29dbd2f4b019cb2afc52ae3fd05 PLoS ONE, Vol 14, Iss 9, p e0222391 (2019) Medicine R Science Q article 2019 ftdoajarticles https://doi.org/10.1371/journal.pone.0222391 2022-12-31T13:17:36Z Shrimp trawlers in the Barents Sea use a Nordmøre sorting grid ahead of a small-mesh codend to avoid bycatch while catching shrimps efficiently. However, small fish can still pass through the grid to enter the codend, which increases their risk of being retained. In this study, we quantified the selectivity of a standard Nordmøre grid used together with one of two different codend designs, namely a diamond mesh codend with square mesh panels and a codend with a square mesh sorting cone section, for deep-water shrimp (Pandalus borealis), redfish (Sebastes spp.), and American plaice (Hippoglossoides platessoides). For the first time, the selective properties of these two alternative designs were estimated and compared to those of a Nordmøre grid used together with a 35-mm diamond mesh codend, which is the compulsory gear used in the fishery today. With this traditional codend, the size selectivity of both bycatch species showed the expected characteristic bell-shaped size selection pattern, with low retention probability of very small fish and bigger fish but with high retention probability of certain sizes of juveniles. Using the square mesh sorting cone significantly reduced the maximum retention risk of redfish. The maximum retention with the diamond mesh codend with square mesh panels was estimated to be 14% lower than that of the traditional codend, but the difference was not statistically significant. The two alternative codend designs did not result in any significant reduction in bycatch of American plaice. Article in Journal/Newspaper Barents Sea Pandalus borealis Directory of Open Access Journals: DOAJ Articles Barents Sea Nordmøre ENVELOPE(8.500,8.500,63.000,63.000) PLOS ONE 14 9 e0222391 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Medicine R Science Q |
spellingShingle |
Medicine R Science Q Manu Sistiaga Bent Herrmann Roger Bertrand Larsen Jesse Brinkhof Quantification of bell-shaped size selectivity in shrimp trawl fisheries using square mesh panels and a sorting cone after a Nordmøre grid. |
topic_facet |
Medicine R Science Q |
description |
Shrimp trawlers in the Barents Sea use a Nordmøre sorting grid ahead of a small-mesh codend to avoid bycatch while catching shrimps efficiently. However, small fish can still pass through the grid to enter the codend, which increases their risk of being retained. In this study, we quantified the selectivity of a standard Nordmøre grid used together with one of two different codend designs, namely a diamond mesh codend with square mesh panels and a codend with a square mesh sorting cone section, for deep-water shrimp (Pandalus borealis), redfish (Sebastes spp.), and American plaice (Hippoglossoides platessoides). For the first time, the selective properties of these two alternative designs were estimated and compared to those of a Nordmøre grid used together with a 35-mm diamond mesh codend, which is the compulsory gear used in the fishery today. With this traditional codend, the size selectivity of both bycatch species showed the expected characteristic bell-shaped size selection pattern, with low retention probability of very small fish and bigger fish but with high retention probability of certain sizes of juveniles. Using the square mesh sorting cone significantly reduced the maximum retention risk of redfish. The maximum retention with the diamond mesh codend with square mesh panels was estimated to be 14% lower than that of the traditional codend, but the difference was not statistically significant. The two alternative codend designs did not result in any significant reduction in bycatch of American plaice. |
format |
Article in Journal/Newspaper |
author |
Manu Sistiaga Bent Herrmann Roger Bertrand Larsen Jesse Brinkhof |
author_facet |
Manu Sistiaga Bent Herrmann Roger Bertrand Larsen Jesse Brinkhof |
author_sort |
Manu Sistiaga |
title |
Quantification of bell-shaped size selectivity in shrimp trawl fisheries using square mesh panels and a sorting cone after a Nordmøre grid. |
title_short |
Quantification of bell-shaped size selectivity in shrimp trawl fisheries using square mesh panels and a sorting cone after a Nordmøre grid. |
title_full |
Quantification of bell-shaped size selectivity in shrimp trawl fisheries using square mesh panels and a sorting cone after a Nordmøre grid. |
title_fullStr |
Quantification of bell-shaped size selectivity in shrimp trawl fisheries using square mesh panels and a sorting cone after a Nordmøre grid. |
title_full_unstemmed |
Quantification of bell-shaped size selectivity in shrimp trawl fisheries using square mesh panels and a sorting cone after a Nordmøre grid. |
title_sort |
quantification of bell-shaped size selectivity in shrimp trawl fisheries using square mesh panels and a sorting cone after a nordmøre grid. |
publisher |
Public Library of Science (PLoS) |
publishDate |
2019 |
url |
https://doi.org/10.1371/journal.pone.0222391 https://doaj.org/article/0bbaf29dbd2f4b019cb2afc52ae3fd05 |
long_lat |
ENVELOPE(8.500,8.500,63.000,63.000) |
geographic |
Barents Sea Nordmøre |
geographic_facet |
Barents Sea Nordmøre |
genre |
Barents Sea Pandalus borealis |
genre_facet |
Barents Sea Pandalus borealis |
op_source |
PLoS ONE, Vol 14, Iss 9, p e0222391 (2019) |
op_relation |
https://doi.org/10.1371/journal.pone.0222391 https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0222391 https://doaj.org/article/0bbaf29dbd2f4b019cb2afc52ae3fd05 |
op_doi |
https://doi.org/10.1371/journal.pone.0222391 |
container_title |
PLOS ONE |
container_volume |
14 |
container_issue |
9 |
container_start_page |
e0222391 |
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