Catch Efficiency of Groundgears in a Bottom Trawl Fishery: A Case Study of the Barents Sea Haddock
The catch efficiency of two types of groundgear—a conventional rockhopper and a new type of groundgear called the semicircular spreading gear (SCSG)—was investigated through experimental fishing for Haddock Melanogrammus aeglefinus conducted in the Barents Sea. A retainer bag was attached behind the...
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Online Access: | http://hdl.handle.net/11250/2567696 https://doi.org/10.1002/mcf2.10048 |
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ftsintef:oai:sintef.brage.unit.no:11250/2567696 2024-09-15T17:55:34+00:00 Catch Efficiency of Groundgears in a Bottom Trawl Fishery: A Case Study of the Barents Sea Haddock Larsen, Roger B. Herrmann, Bent Brinkhof, Jesse Grimaldo, Eduardo Sistiaga, Manu Berrondo Tatone, Ivan 2018-10-10 application/pdf http://hdl.handle.net/11250/2567696 https://doi.org/10.1002/mcf2.10048 eng eng American Fishery Society Marine and Coastal Fisheries. 2018, 10, 493-507. urn:issn:1942-5120 http://hdl.handle.net/11250/2567696 https://doi.org/10.1002/mcf2.10048 cristin:1619674 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © 2018 The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. . Marine and Coastal Fisheries Journal article Peer reviewed 2018 ftsintef https://doi.org/10.1002/mcf2.10048 2024-08-30T03:27:11Z The catch efficiency of two types of groundgear—a conventional rockhopper and a new type of groundgear called the semicircular spreading gear (SCSG)—was investigated through experimental fishing for Haddock Melanogrammus aeglefinus conducted in the Barents Sea. A retainer bag was attached behind the footrope of the trawl, and the number of fish that were overrun by the trawl was compared with the catch in the trawl cod end. The catch efficiency increased slightly for larger Haddock for both groundgears. The SCSG was found to have a significantly higher catch efficiency than the conventional rockhopper groundgear. The estimated improvement in catch efficiency varied between 4.5% and 12.3%, with an equivalent reduction in escape rate underneath the groundgear of more than 70%. The rockhopper groundgear can have a catch efficiency as low as 76%, corresponding with values reported in previous studies. Average catch efficiency for the rockhopper gear was significantly lower during the night in comparison with the daytime. No such difference was found with the SCSG. The SCSG is more efficient for catching Haddock, and it is lighter than the rockhopper groundgear. Both are important factors in reducing seabed impact and fuel consumption. When compared to results of a similar study on Atlantic Cod Gadus morhua, we found that in general, both groundgears had a greater catch efficiency for Haddock, which accords with differences in behavior between the two species. publishedVersion Article in Journal/Newspaper atlantic cod Barents Sea Gadus morhua SINTEF Open Marine and Coastal Fisheries 10 5 493 507 |
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English |
description |
The catch efficiency of two types of groundgear—a conventional rockhopper and a new type of groundgear called the semicircular spreading gear (SCSG)—was investigated through experimental fishing for Haddock Melanogrammus aeglefinus conducted in the Barents Sea. A retainer bag was attached behind the footrope of the trawl, and the number of fish that were overrun by the trawl was compared with the catch in the trawl cod end. The catch efficiency increased slightly for larger Haddock for both groundgears. The SCSG was found to have a significantly higher catch efficiency than the conventional rockhopper groundgear. The estimated improvement in catch efficiency varied between 4.5% and 12.3%, with an equivalent reduction in escape rate underneath the groundgear of more than 70%. The rockhopper groundgear can have a catch efficiency as low as 76%, corresponding with values reported in previous studies. Average catch efficiency for the rockhopper gear was significantly lower during the night in comparison with the daytime. No such difference was found with the SCSG. The SCSG is more efficient for catching Haddock, and it is lighter than the rockhopper groundgear. Both are important factors in reducing seabed impact and fuel consumption. When compared to results of a similar study on Atlantic Cod Gadus morhua, we found that in general, both groundgears had a greater catch efficiency for Haddock, which accords with differences in behavior between the two species. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Larsen, Roger B. Herrmann, Bent Brinkhof, Jesse Grimaldo, Eduardo Sistiaga, Manu Berrondo Tatone, Ivan |
spellingShingle |
Larsen, Roger B. Herrmann, Bent Brinkhof, Jesse Grimaldo, Eduardo Sistiaga, Manu Berrondo Tatone, Ivan Catch Efficiency of Groundgears in a Bottom Trawl Fishery: A Case Study of the Barents Sea Haddock |
author_facet |
Larsen, Roger B. Herrmann, Bent Brinkhof, Jesse Grimaldo, Eduardo Sistiaga, Manu Berrondo Tatone, Ivan |
author_sort |
Larsen, Roger B. |
title |
Catch Efficiency of Groundgears in a Bottom Trawl Fishery: A Case Study of the Barents Sea Haddock |
title_short |
Catch Efficiency of Groundgears in a Bottom Trawl Fishery: A Case Study of the Barents Sea Haddock |
title_full |
Catch Efficiency of Groundgears in a Bottom Trawl Fishery: A Case Study of the Barents Sea Haddock |
title_fullStr |
Catch Efficiency of Groundgears in a Bottom Trawl Fishery: A Case Study of the Barents Sea Haddock |
title_full_unstemmed |
Catch Efficiency of Groundgears in a Bottom Trawl Fishery: A Case Study of the Barents Sea Haddock |
title_sort |
catch efficiency of groundgears in a bottom trawl fishery: a case study of the barents sea haddock |
publisher |
American Fishery Society |
publishDate |
2018 |
url |
http://hdl.handle.net/11250/2567696 https://doi.org/10.1002/mcf2.10048 |
genre |
atlantic cod Barents Sea Gadus morhua |
genre_facet |
atlantic cod Barents Sea Gadus morhua |
op_source |
Marine and Coastal Fisheries |
op_relation |
Marine and Coastal Fisheries. 2018, 10, 493-507. urn:issn:1942-5120 http://hdl.handle.net/11250/2567696 https://doi.org/10.1002/mcf2.10048 cristin:1619674 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © 2018 The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. . |
op_doi |
https://doi.org/10.1002/mcf2.10048 |
container_title |
Marine and Coastal Fisheries |
container_volume |
10 |
container_issue |
5 |
container_start_page |
493 |
op_container_end_page |
507 |
_version_ |
1810431828699381760 |