New approach for modelling size selectivity in shrimp trawl fisheries
Abstract In the deep sea trawl fishery targeting shrimp (Pandalus borealis) and other cold-water shrimp species, fishers often use a Nordmöre sorting grid ahead of a small mesh codend to avoid bycatch. However, small fish can pass through the grid and are subsequently retained in the codend. This ma...
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Online Access: | http://dx.doi.org/10.1093/icesjms/fsx117 http://academic.oup.com/icesjms/article-pdf/75/1/351/33507926/fsx117.pdf |
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croxfordunivpr:10.1093/icesjms/fsx117 2023-05-15T15:38:57+02:00 New approach for modelling size selectivity in shrimp trawl fisheries Larsen, Roger B Herrmann, Bent Sistiaga, Manu Brinkhof, Jesse Tatone, Ivan Langård, Lise Eayrs, Stephen 2017 http://dx.doi.org/10.1093/icesjms/fsx117 http://academic.oup.com/icesjms/article-pdf/75/1/351/33507926/fsx117.pdf en eng Oxford University Press (OUP) https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model ICES Journal of Marine Science volume 75, issue 1, page 351-360 ISSN 1054-3139 1095-9289 Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2017 croxfordunivpr https://doi.org/10.1093/icesjms/fsx117 2022-12-30T10:35:11Z Abstract In the deep sea trawl fishery targeting shrimp (Pandalus borealis) and other cold-water shrimp species, fishers often use a Nordmöre sorting grid ahead of a small mesh codend to avoid bycatch. However, small fish can pass through the grid and are subsequently retained in the codend. This makes shrimp size selection complex and the size-dependent curve for both the shrimp and the bycatch species often exhibits a bell-shaped signature. In this study we developed a new model and method to estimate size selection in this fishery, conducted fishing trials in the Northeast Barents Sea, and applied the new method to quantify the individual and combined size selection of the Nordmöre grid and codend for deep water shrimp and two bycatch species. The size selectivity for both bycatch species showed the expected bell-shaped signature with low retention probability of very small and larger fish. The Nordmöre grid had high passage probability for all sizes, although it decreased slightly for the largest shrimps. The smallest shrimps were released by the codend. Article in Journal/Newspaper Barents Sea Pandalus borealis Oxford University Press (via Crossref) Barents Sea ICES Journal of Marine Science 75 1 351 360 |
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Open Polar |
collection |
Oxford University Press (via Crossref) |
op_collection_id |
croxfordunivpr |
language |
English |
topic |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography Larsen, Roger B Herrmann, Bent Sistiaga, Manu Brinkhof, Jesse Tatone, Ivan Langård, Lise New approach for modelling size selectivity in shrimp trawl fisheries |
topic_facet |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract In the deep sea trawl fishery targeting shrimp (Pandalus borealis) and other cold-water shrimp species, fishers often use a Nordmöre sorting grid ahead of a small mesh codend to avoid bycatch. However, small fish can pass through the grid and are subsequently retained in the codend. This makes shrimp size selection complex and the size-dependent curve for both the shrimp and the bycatch species often exhibits a bell-shaped signature. In this study we developed a new model and method to estimate size selection in this fishery, conducted fishing trials in the Northeast Barents Sea, and applied the new method to quantify the individual and combined size selection of the Nordmöre grid and codend for deep water shrimp and two bycatch species. The size selectivity for both bycatch species showed the expected bell-shaped signature with low retention probability of very small and larger fish. The Nordmöre grid had high passage probability for all sizes, although it decreased slightly for the largest shrimps. The smallest shrimps were released by the codend. |
author2 |
Eayrs, Stephen |
format |
Article in Journal/Newspaper |
author |
Larsen, Roger B Herrmann, Bent Sistiaga, Manu Brinkhof, Jesse Tatone, Ivan Langård, Lise |
author_facet |
Larsen, Roger B Herrmann, Bent Sistiaga, Manu Brinkhof, Jesse Tatone, Ivan Langård, Lise |
author_sort |
Larsen, Roger B |
title |
New approach for modelling size selectivity in shrimp trawl fisheries |
title_short |
New approach for modelling size selectivity in shrimp trawl fisheries |
title_full |
New approach for modelling size selectivity in shrimp trawl fisheries |
title_fullStr |
New approach for modelling size selectivity in shrimp trawl fisheries |
title_full_unstemmed |
New approach for modelling size selectivity in shrimp trawl fisheries |
title_sort |
new approach for modelling size selectivity in shrimp trawl fisheries |
publisher |
Oxford University Press (OUP) |
publishDate |
2017 |
url |
http://dx.doi.org/10.1093/icesjms/fsx117 http://academic.oup.com/icesjms/article-pdf/75/1/351/33507926/fsx117.pdf |
geographic |
Barents Sea |
geographic_facet |
Barents Sea |
genre |
Barents Sea Pandalus borealis |
genre_facet |
Barents Sea Pandalus borealis |
op_source |
ICES Journal of Marine Science volume 75, issue 1, page 351-360 ISSN 1054-3139 1095-9289 |
op_rights |
https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model |
op_doi |
https://doi.org/10.1093/icesjms/fsx117 |
container_title |
ICES Journal of Marine Science |
container_volume |
75 |
container_issue |
1 |
container_start_page |
351 |
op_container_end_page |
360 |
_version_ |
1766370369632993280 |