Can vertical separation of species in trawls be utilized to reduce bycatch in shrimp fisheries?
Several shrimp trawl fisheries use a Nordmore sorting grid to avoid bycatch of fish. However, small fish can pass through the grid. Therefore, the retention of juvenile fish often remains an issue during shrimp trawling. We investigated the vertical distribution of deepwater shrimp (Pandalus boreali...
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Online Access: | https://hdl.handle.net/11454/77910 https://doi.org/10.1371/journal.pone.0249172 |
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ftunivege:oai:gcris.ege.edu.tr:11454/77910 2023-12-17T10:28:18+01:00 Can vertical separation of species in trawls be utilized to reduce bycatch in shrimp fisheries? Herrmann, Bent Larsen, Roger B. Brcic, Jure Sistiaga, Manu Cerbule, Kristine Nielsen, Kare Nolde Jacques, Nadine 2021 https://hdl.handle.net/11454/77910 https://doi.org/10.1371/journal.pone.0249172 en eng Public Library Science Plos One Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı 33770115 1932-6203 https://hdl.handle.net/11454/77910 https://doi.org/10.1371/journal.pone.0249172 doi:10.1371/journal.pone.0249172 Jacques, Nadine/0000-0001-6981-3825 Larsen, Roger B./0000-0003-2884-5817 Tokaç, Adnan/0000-0002-2968-7315 Brcic, Jure/0000-0003-3181-1749 Herrmann, Bent/0000-0003-1325-6198 Nielsen, Kare/0000-0003-4335-870X Cuende de Francisco, Elsa/0000-0002-5787-5612 16 3 open Size Selection Redfish Sebastes Spp Nephrops-Norvegicus Pink Shrimp By-Catch Fish Design Behavior Panel Article 2021 ftunivege https://doi.org/10.1371/journal.pone.0249172 2023-11-23T17:55:53Z Several shrimp trawl fisheries use a Nordmore sorting grid to avoid bycatch of fish. However, small fish can pass through the grid. Therefore, the retention of juvenile fish often remains an issue during shrimp trawling. We investigated the vertical distribution of deepwater shrimp (Pandalus borealis) and dominant bycatch species at the point where the Nordmore grid section is installed. This was achieved using a separator frame which split the net vertically into three compartments of equal entry size. Our results showed that shrimp predominately follow the lower part of the trawl belly, whereas species such as redfish (Sebastes spp.), cod (Gadus morhua), polar cod (Boreogadus saida) and American plaice (Hippoglossoides platessoides) preferred the mid-section in the aft of the trawl. Haddock (Melanogrammus aeglefinus) primarily entered through the upper section of the trawl belly. Using these results, we predict that a vertical separation device installed forward of a 19 mm Nordmore grid combined with a 35 mm codend would result in a significant reduction in bycatch with only minor loss of shrimp. We are grateful to the Norwegian Seafood Research Fund (FHF project number 901303) for funding the experiments. The publication charges for this Article have been funded by a grant from the publication fund of UiT The Arctic University of Norway. Norwegian Seafood Research Fund (FHF project) [901303]; UiT The Arctic University of Norway Article in Journal/Newspaper Boreogadus saida Gadus morhua Pandalus borealis polar cod Arctic University of Norway UiT The Arctic University of Norway Ege University Institutional Repository Arctic Norway Journal of Animal Ecology 68 1 60 72 |
institution |
Open Polar |
collection |
Ege University Institutional Repository |
op_collection_id |
ftunivege |
language |
English |
topic |
Size Selection Redfish Sebastes Spp Nephrops-Norvegicus Pink Shrimp By-Catch Fish Design Behavior Panel |
spellingShingle |
Size Selection Redfish Sebastes Spp Nephrops-Norvegicus Pink Shrimp By-Catch Fish Design Behavior Panel Herrmann, Bent Larsen, Roger B. Brcic, Jure Sistiaga, Manu Cerbule, Kristine Nielsen, Kare Nolde Jacques, Nadine Can vertical separation of species in trawls be utilized to reduce bycatch in shrimp fisheries? |
topic_facet |
Size Selection Redfish Sebastes Spp Nephrops-Norvegicus Pink Shrimp By-Catch Fish Design Behavior Panel |
description |
Several shrimp trawl fisheries use a Nordmore sorting grid to avoid bycatch of fish. However, small fish can pass through the grid. Therefore, the retention of juvenile fish often remains an issue during shrimp trawling. We investigated the vertical distribution of deepwater shrimp (Pandalus borealis) and dominant bycatch species at the point where the Nordmore grid section is installed. This was achieved using a separator frame which split the net vertically into three compartments of equal entry size. Our results showed that shrimp predominately follow the lower part of the trawl belly, whereas species such as redfish (Sebastes spp.), cod (Gadus morhua), polar cod (Boreogadus saida) and American plaice (Hippoglossoides platessoides) preferred the mid-section in the aft of the trawl. Haddock (Melanogrammus aeglefinus) primarily entered through the upper section of the trawl belly. Using these results, we predict that a vertical separation device installed forward of a 19 mm Nordmore grid combined with a 35 mm codend would result in a significant reduction in bycatch with only minor loss of shrimp. We are grateful to the Norwegian Seafood Research Fund (FHF project number 901303) for funding the experiments. The publication charges for this Article have been funded by a grant from the publication fund of UiT The Arctic University of Norway. Norwegian Seafood Research Fund (FHF project) [901303]; UiT The Arctic University of Norway |
format |
Article in Journal/Newspaper |
author |
Herrmann, Bent Larsen, Roger B. Brcic, Jure Sistiaga, Manu Cerbule, Kristine Nielsen, Kare Nolde Jacques, Nadine |
author_facet |
Herrmann, Bent Larsen, Roger B. Brcic, Jure Sistiaga, Manu Cerbule, Kristine Nielsen, Kare Nolde Jacques, Nadine |
author_sort |
Herrmann, Bent |
title |
Can vertical separation of species in trawls be utilized to reduce bycatch in shrimp fisheries? |
title_short |
Can vertical separation of species in trawls be utilized to reduce bycatch in shrimp fisheries? |
title_full |
Can vertical separation of species in trawls be utilized to reduce bycatch in shrimp fisheries? |
title_fullStr |
Can vertical separation of species in trawls be utilized to reduce bycatch in shrimp fisheries? |
title_full_unstemmed |
Can vertical separation of species in trawls be utilized to reduce bycatch in shrimp fisheries? |
title_sort |
can vertical separation of species in trawls be utilized to reduce bycatch in shrimp fisheries? |
publisher |
Public Library Science |
publishDate |
2021 |
url |
https://hdl.handle.net/11454/77910 https://doi.org/10.1371/journal.pone.0249172 |
geographic |
Arctic Norway |
geographic_facet |
Arctic Norway |
genre |
Boreogadus saida Gadus morhua Pandalus borealis polar cod Arctic University of Norway UiT The Arctic University of Norway |
genre_facet |
Boreogadus saida Gadus morhua Pandalus borealis polar cod Arctic University of Norway UiT The Arctic University of Norway |
op_relation |
Plos One Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı 33770115 1932-6203 https://hdl.handle.net/11454/77910 https://doi.org/10.1371/journal.pone.0249172 doi:10.1371/journal.pone.0249172 Jacques, Nadine/0000-0001-6981-3825 Larsen, Roger B./0000-0003-2884-5817 Tokaç, Adnan/0000-0002-2968-7315 Brcic, Jure/0000-0003-3181-1749 Herrmann, Bent/0000-0003-1325-6198 Nielsen, Kare/0000-0003-4335-870X Cuende de Francisco, Elsa/0000-0002-5787-5612 16 3 |
op_rights |
open |
op_doi |
https://doi.org/10.1371/journal.pone.0249172 |
container_title |
Journal of Animal Ecology |
container_volume |
68 |
container_issue |
1 |
container_start_page |
60 |
op_container_end_page |
72 |
_version_ |
1785580392606072832 |