Catch pattern and size selectivity for a gear designed to prevent fish injuries during the capture process in a North-East Atlantic demersal trawl fishery
In the North-East Atlantic demersal trawl fishery targeting cod and haddock, the interest on fishing gear designs that preserve fish quality and welfare has grown. However, the gear configurations tested so far imply practical challenges, therefore, more user-friendly designs are still sought by the...
Published in: | Regional Studies in Marine Science |
---|---|
Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2020
|
Subjects: | |
Online Access: | https://hdl.handle.net/11250/2689552 https://doi.org/10.1016/j.rsma.2020.101525 |
id |
ftimr:oai:imr.brage.unit.no:11250/2689552 |
---|---|
record_format |
openpolar |
spelling |
ftimr:oai:imr.brage.unit.no:11250/2689552 2023-05-15T16:19:17+02:00 Catch pattern and size selectivity for a gear designed to prevent fish injuries during the capture process in a North-East Atlantic demersal trawl fishery Herrmann, Bent Sistiaga, Manu Larsen, Roger B. Brinkhof, Jesse Gjøsund, Svein Helge Jacques, Nadine Santos, Juan 2020 application/pdf https://hdl.handle.net/11250/2689552 https://doi.org/10.1016/j.rsma.2020.101525 eng eng urn:issn:2352-4855 https://hdl.handle.net/11250/2689552 https://doi.org/10.1016/j.rsma.2020.101525 cristin:1846067 40 Regional Studies in Marine Science Peer reviewed Journal article 2020 ftimr https://doi.org/10.1016/j.rsma.2020.101525 2021-09-23T20:16:00Z In the North-East Atlantic demersal trawl fishery targeting cod and haddock, the interest on fishing gear designs that preserve fish quality and welfare has grown. However, the gear configurations tested so far imply practical challenges, therefore, more user-friendly designs are still sought by the industry. For a new design to be considered, it needs to have size selective properties that are at least comparable to those obtained with the standard grid and codend gear configuration used in the fishery today. In the present study, we investigated the size selectivity of a new design on three of the most important commercial species in the fishery: cod (Gadus morhua), haddock (Melanogrammus aeglefinnus) and redfish (Sebastes spp.). The new design did not include a sorting grid and was composed of a large mesh segment followed by a quality preserving codend installed in the aft of the gear. The results showed that the experimental gear did not work as intended, catching significantly higher numbers of undersized fish than the standard gear for all three species included in the study. Further, based on hypothesis testing, the null hypothesis of “zero release from the experimental gear” could not be falsified, meaning that it could not be ruled out that there was no escape of fish at all from the experimental gear tested. Despite the negative results obtained, the results from this study enhance the understanding of gear selectivity in towed fishing gears. publishedVersion Article in Journal/Newspaper Gadus morhua North East Atlantic Institute for Marine Research: Brage IMR Regional Studies in Marine Science 40 101525 |
institution |
Open Polar |
collection |
Institute for Marine Research: Brage IMR |
op_collection_id |
ftimr |
language |
English |
description |
In the North-East Atlantic demersal trawl fishery targeting cod and haddock, the interest on fishing gear designs that preserve fish quality and welfare has grown. However, the gear configurations tested so far imply practical challenges, therefore, more user-friendly designs are still sought by the industry. For a new design to be considered, it needs to have size selective properties that are at least comparable to those obtained with the standard grid and codend gear configuration used in the fishery today. In the present study, we investigated the size selectivity of a new design on three of the most important commercial species in the fishery: cod (Gadus morhua), haddock (Melanogrammus aeglefinnus) and redfish (Sebastes spp.). The new design did not include a sorting grid and was composed of a large mesh segment followed by a quality preserving codend installed in the aft of the gear. The results showed that the experimental gear did not work as intended, catching significantly higher numbers of undersized fish than the standard gear for all three species included in the study. Further, based on hypothesis testing, the null hypothesis of “zero release from the experimental gear” could not be falsified, meaning that it could not be ruled out that there was no escape of fish at all from the experimental gear tested. Despite the negative results obtained, the results from this study enhance the understanding of gear selectivity in towed fishing gears. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Herrmann, Bent Sistiaga, Manu Larsen, Roger B. Brinkhof, Jesse Gjøsund, Svein Helge Jacques, Nadine Santos, Juan |
spellingShingle |
Herrmann, Bent Sistiaga, Manu Larsen, Roger B. Brinkhof, Jesse Gjøsund, Svein Helge Jacques, Nadine Santos, Juan Catch pattern and size selectivity for a gear designed to prevent fish injuries during the capture process in a North-East Atlantic demersal trawl fishery |
author_facet |
Herrmann, Bent Sistiaga, Manu Larsen, Roger B. Brinkhof, Jesse Gjøsund, Svein Helge Jacques, Nadine Santos, Juan |
author_sort |
Herrmann, Bent |
title |
Catch pattern and size selectivity for a gear designed to prevent fish injuries during the capture process in a North-East Atlantic demersal trawl fishery |
title_short |
Catch pattern and size selectivity for a gear designed to prevent fish injuries during the capture process in a North-East Atlantic demersal trawl fishery |
title_full |
Catch pattern and size selectivity for a gear designed to prevent fish injuries during the capture process in a North-East Atlantic demersal trawl fishery |
title_fullStr |
Catch pattern and size selectivity for a gear designed to prevent fish injuries during the capture process in a North-East Atlantic demersal trawl fishery |
title_full_unstemmed |
Catch pattern and size selectivity for a gear designed to prevent fish injuries during the capture process in a North-East Atlantic demersal trawl fishery |
title_sort |
catch pattern and size selectivity for a gear designed to prevent fish injuries during the capture process in a north-east atlantic demersal trawl fishery |
publishDate |
2020 |
url |
https://hdl.handle.net/11250/2689552 https://doi.org/10.1016/j.rsma.2020.101525 |
genre |
Gadus morhua North East Atlantic |
genre_facet |
Gadus morhua North East Atlantic |
op_source |
40 Regional Studies in Marine Science |
op_relation |
urn:issn:2352-4855 https://hdl.handle.net/11250/2689552 https://doi.org/10.1016/j.rsma.2020.101525 cristin:1846067 |
op_doi |
https://doi.org/10.1016/j.rsma.2020.101525 |
container_title |
Regional Studies in Marine Science |
container_volume |
40 |
container_start_page |
101525 |
_version_ |
1766005664737394688 |