Effect of three different codend designs on the size selectivity of juvenile cod in the Barents Sea shrimp trawl fishery
Source at https://doi.org/10.1016/j.fishres.2019.105337 . Shrimp trawlers often use a Nordmøre sorting grid ahead of a small mesh codend to avoid bycatch of juvenile fish while allowing shrimps to be efficiently caught. However, small fish can pass through the grid to enter the codend and risk being...
Published in: | Fisheries Research |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Elsevier
2019
|
Subjects: | |
Online Access: | https://hdl.handle.net/10037/16226 https://doi.org/10.1016/j.fishres.2019.105337 |
id |
ftunivtroemsoe:oai:munin.uit.no:10037/16226 |
---|---|
record_format |
openpolar |
spelling |
ftunivtroemsoe:oai:munin.uit.no:10037/16226 2023-05-15T15:38:48+02:00 Effect of three different codend designs on the size selectivity of juvenile cod in the Barents Sea shrimp trawl fishery Herrmann, Bent Sistiaga, Manu Berrondo Larsen, Roger B. Brinkhof, Jesse 2019-07-31 https://hdl.handle.net/10037/16226 https://doi.org/10.1016/j.fishres.2019.105337 eng eng Elsevier Fisheries Research FRIDAID 1713674 doi:10.1016/j.fishres.2019.105337 0165-7836 1872-6763 https://hdl.handle.net/10037/16226 openAccess VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fisheries technology: 924 VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920::Fiskeriteknologi: 924 Shrimp fishery Bycatch Cod Size selectivity Nordmøre grid Codend design Journal article Tidsskriftartikkel Peer reviewed 2019 ftunivtroemsoe https://doi.org/10.1016/j.fishres.2019.105337 2021-06-25T17:56:44Z Source at https://doi.org/10.1016/j.fishres.2019.105337 . Shrimp trawlers often use a Nordmøre sorting grid ahead of a small mesh codend to avoid bycatch of juvenile fish while allowing shrimps to be efficiently caught. However, small fish can pass through the grid to enter the codend and risk being retained. The risk of retention for fish of different sizes depends the size selection in the Nordmøre grid and the size selection in the subsequent codend, which makes the process complex and often results in a bell-shaped size selection curve. In the Barents Sea shrimp fishery, cod ( Gadus morhua ) is one of the species of concern because of its great commercial value. We studied the size selection of juvenile cod when the trawl was equipped with the compulsory gear in the fishery: a 19 mm Nordmøre grid followed by a 35 mm diamond mesh codend. As expected, the size selection curve showed a bell-shaped signature, with a certain size range of juveniles having high retention risk, while the risk for smaller and bigger cod was smaller. The retention risk was highest for cod between 12 and 20 cm in length. We also tested two alternative designs in the aft section of the gear: a codend with 35 mm square mesh panels and a square mesh sorting cone section. Neither of these designs affected the size selection in the trawl significantly. Article in Journal/Newspaper Barents Sea Gadus morhua University of Tromsø: Munin Open Research Archive Barents Sea Nordmøre ENVELOPE(8.500,8.500,63.000,63.000) Fisheries Research 219 105337 |
institution |
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 Shrimp fishery Bycatch Cod Size selectivity Nordmøre grid Codend design |
spellingShingle |
VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fisheries technology: 924 VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920::Fiskeriteknologi: 924 Shrimp fishery Bycatch Cod Size selectivity Nordmøre grid Codend design Herrmann, Bent Sistiaga, Manu Berrondo Larsen, Roger B. Brinkhof, Jesse Effect of three different codend designs on the size selectivity of juvenile cod in the Barents Sea shrimp trawl fishery |
topic_facet |
VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fisheries technology: 924 VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920::Fiskeriteknologi: 924 Shrimp fishery Bycatch Cod Size selectivity Nordmøre grid Codend design |
description |
Source at https://doi.org/10.1016/j.fishres.2019.105337 . Shrimp trawlers often use a Nordmøre sorting grid ahead of a small mesh codend to avoid bycatch of juvenile fish while allowing shrimps to be efficiently caught. However, small fish can pass through the grid to enter the codend and risk being retained. The risk of retention for fish of different sizes depends the size selection in the Nordmøre grid and the size selection in the subsequent codend, which makes the process complex and often results in a bell-shaped size selection curve. In the Barents Sea shrimp fishery, cod ( Gadus morhua ) is one of the species of concern because of its great commercial value. We studied the size selection of juvenile cod when the trawl was equipped with the compulsory gear in the fishery: a 19 mm Nordmøre grid followed by a 35 mm diamond mesh codend. As expected, the size selection curve showed a bell-shaped signature, with a certain size range of juveniles having high retention risk, while the risk for smaller and bigger cod was smaller. The retention risk was highest for cod between 12 and 20 cm in length. We also tested two alternative designs in the aft section of the gear: a codend with 35 mm square mesh panels and a square mesh sorting cone section. Neither of these designs affected the size selection in the trawl significantly. |
format |
Article in Journal/Newspaper |
author |
Herrmann, Bent Sistiaga, Manu Berrondo Larsen, Roger B. Brinkhof, Jesse |
author_facet |
Herrmann, Bent Sistiaga, Manu Berrondo Larsen, Roger B. Brinkhof, Jesse |
author_sort |
Herrmann, Bent |
title |
Effect of three different codend designs on the size selectivity of juvenile cod in the Barents Sea shrimp trawl fishery |
title_short |
Effect of three different codend designs on the size selectivity of juvenile cod in the Barents Sea shrimp trawl fishery |
title_full |
Effect of three different codend designs on the size selectivity of juvenile cod in the Barents Sea shrimp trawl fishery |
title_fullStr |
Effect of three different codend designs on the size selectivity of juvenile cod in the Barents Sea shrimp trawl fishery |
title_full_unstemmed |
Effect of three different codend designs on the size selectivity of juvenile cod in the Barents Sea shrimp trawl fishery |
title_sort |
effect of three different codend designs on the size selectivity of juvenile cod in the barents sea shrimp trawl fishery |
publisher |
Elsevier |
publishDate |
2019 |
url |
https://hdl.handle.net/10037/16226 https://doi.org/10.1016/j.fishres.2019.105337 |
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 |
genre_facet |
Barents Sea Gadus morhua |
op_relation |
Fisheries Research FRIDAID 1713674 doi:10.1016/j.fishres.2019.105337 0165-7836 1872-6763 https://hdl.handle.net/10037/16226 |
op_rights |
openAccess |
op_doi |
https://doi.org/10.1016/j.fishres.2019.105337 |
container_title |
Fisheries Research |
container_volume |
219 |
container_start_page |
105337 |
_version_ |
1766370136236752896 |