Can vertical separation of species in trawls be utilized to reduce bycatch in shrimp fisheries?
Several shrimp trawl fisheries use a Nordmöre 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 boreal...
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ftunivtroemsoe:oai:munin.uit.no:10037/21532 2023-05-15T15:45:45+02:00 Can vertical separation of species in trawls be utilized to reduce bycatch in shrimp fisheries? Larsen, Roger B. Herrmann, Bent Brcic, Jure Sistiaga, Manu Cerbule, Kristine Nielsen, Kåre Nolde Jacques, Nadine Lomeli, Mark Joseph Max Tokac, Adnan Cuende, Elsa 2021-03-26 https://hdl.handle.net/10037/21532 https://doi.org/10.1371/journal.pone.0249172 eng eng PLoS PLOS ONE FRIDAID 1901431 doi:10.1371/journal.pone.0249172 1932-6203 https://hdl.handle.net/10037/21532 openAccess Copyright 2021 The Author(s) VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fisheries technology: 924 VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920::Fiskeriteknologi: 924 Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2021 ftunivtroemsoe https://doi.org/10.1371/journal.pone.0249172 2021-06-25T17:58:10Z Several shrimp trawl fisheries use a Nordmöre 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 Nordmöre 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 Nordmöre grid combined with a 35 mm codend would result in a significant reduction in bycatch with only minor loss of shrimp. Article in Journal/Newspaper Boreogadus saida Gadus morhua Pandalus borealis polar cod University of Tromsø: Munin Open Research Archive PLOS ONE 16 3 e0249172 |
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Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fisheries technology: 924 VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920::Fiskeriteknologi: 924 |
spellingShingle |
VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fisheries technology: 924 VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920::Fiskeriteknologi: 924 Larsen, Roger B. Herrmann, Bent Brcic, Jure Sistiaga, Manu Cerbule, Kristine Nielsen, Kåre Nolde Jacques, Nadine Lomeli, Mark Joseph Max Tokac, Adnan Cuende, Elsa Can vertical separation of species in trawls be utilized to reduce bycatch in shrimp fisheries? |
topic_facet |
VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fisheries technology: 924 VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920::Fiskeriteknologi: 924 |
description |
Several shrimp trawl fisheries use a Nordmöre 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 Nordmöre 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 Nordmöre grid combined with a 35 mm codend would result in a significant reduction in bycatch with only minor loss of shrimp. |
format |
Article in Journal/Newspaper |
author |
Larsen, Roger B. Herrmann, Bent Brcic, Jure Sistiaga, Manu Cerbule, Kristine Nielsen, Kåre Nolde Jacques, Nadine Lomeli, Mark Joseph Max Tokac, Adnan Cuende, Elsa |
author_facet |
Larsen, Roger B. Herrmann, Bent Brcic, Jure Sistiaga, Manu Cerbule, Kristine Nielsen, Kåre Nolde Jacques, Nadine Lomeli, Mark Joseph Max Tokac, Adnan Cuende, Elsa |
author_sort |
Larsen, Roger B. |
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 |
PLoS |
publishDate |
2021 |
url |
https://hdl.handle.net/10037/21532 https://doi.org/10.1371/journal.pone.0249172 |
genre |
Boreogadus saida Gadus morhua Pandalus borealis polar cod |
genre_facet |
Boreogadus saida Gadus morhua Pandalus borealis polar cod |
op_relation |
PLOS ONE FRIDAID 1901431 doi:10.1371/journal.pone.0249172 1932-6203 https://hdl.handle.net/10037/21532 |
op_rights |
openAccess Copyright 2021 The Author(s) |
op_doi |
https://doi.org/10.1371/journal.pone.0249172 |
container_title |
PLOS ONE |
container_volume |
16 |
container_issue |
3 |
container_start_page |
e0249172 |
_version_ |
1766380304432365568 |