Improved bycatch reduction in the mixed demersal trawl fishery for Norway pout (Trisopterus esmarkii)
In this study, we compared the bycatch reduction capacity of a trawl fitted with a standard rigid sorting grid with that of a trawl fitted with a newly developed, flexible system called the Excluder. We conducted the fishing trials in the Norway pout (Trisopterus esmarkii) small-meshed trawl fishery...
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Language: | English |
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Online Access: | https://hdl.handle.net/11250/3045661 https://doi.org/10.1016/j.ecss.2022.108189 |
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ftsintef:oai:sintef.brage.unit.no:11250/3045661 2023-05-15T16:19:12+02:00 Improved bycatch reduction in the mixed demersal trawl fishery for Norway pout (Trisopterus esmarkii) Grimaldo, Eduardo Brinkhof, Jesse Herrmann, Bent Cerbule, Kristine Grimsmo, Leif Pettersen, Hermann 2022 application/pdf https://hdl.handle.net/11250/3045661 https://doi.org/10.1016/j.ecss.2022.108189 eng eng Elsevier Estuarine, Coastal and Shelf Science. 2022, 281 1-10. urn:issn:0272-7714 https://hdl.handle.net/11250/3045661 https://doi.org/10.1016/j.ecss.2022.108189 cristin:2104355 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © 2022 The Authors. Published by Elsevier Ltd. CC-BY 1-10 281 Estuarine, Coastal and Shelf Science Excluder Sorting grid Bycatch reduction Catch efficiency Norway pout Fishery Peer reviewed Journal article 2022 ftsintef https://doi.org/10.1016/j.ecss.2022.108189 2023-01-25T23:44:11Z In this study, we compared the bycatch reduction capacity of a trawl fitted with a standard rigid sorting grid with that of a trawl fitted with a newly developed, flexible system called the Excluder. We conducted the fishing trials in the Norway pout (Trisopterus esmarkii) small-meshed trawl fishery in the North Sea. Catch data were analysed by species and length using the catch comparison and catch ratio method. The Excluder significantly reduced the bycatch (in weight) relative to the standard grid for blue whiting (Micromesistius poutassou) (−35.6%), mackerel (Scomber scombrus) (−93.3%), horse mackerel (Trachurus trachurus) (−99.3%), herring (Clupea harengus) (−89.9%), haddock (Melanogrammus aeglefinus), (−98.6%), whiting (Merlangius merlangus) (−99.3%), cod (Gadus morhua) (−97.1%), European hake (Merluccius merluccius) (−98.0%), and greater argentine (Argentina sphyraena) (−24.5%). For Norway pout there was a marginal decrease in the overall catch efficiency of −1.4%. The observed bycatch reduction efficiency is explained by the larger sorting area of the Excluder relative to the grid's area and by the differences in behaviour between Norway pout and the bycatch species. While it contributes to reduce bycatch of quota regulated species, the Excluder also can potentially affect the profitability of the fishery. publishedVersion Article in Journal/Newspaper Gadus morhua SINTEF Open (Brage) Norway Argentina Argentine Hake ENVELOPE(15.612,15.612,66.797,66.797) Estuarine, Coastal and Shelf Science 281 108189 |
institution |
Open Polar |
collection |
SINTEF Open (Brage) |
op_collection_id |
ftsintef |
language |
English |
topic |
Excluder Sorting grid Bycatch reduction Catch efficiency Norway pout Fishery |
spellingShingle |
Excluder Sorting grid Bycatch reduction Catch efficiency Norway pout Fishery Grimaldo, Eduardo Brinkhof, Jesse Herrmann, Bent Cerbule, Kristine Grimsmo, Leif Pettersen, Hermann Improved bycatch reduction in the mixed demersal trawl fishery for Norway pout (Trisopterus esmarkii) |
topic_facet |
Excluder Sorting grid Bycatch reduction Catch efficiency Norway pout Fishery |
description |
In this study, we compared the bycatch reduction capacity of a trawl fitted with a standard rigid sorting grid with that of a trawl fitted with a newly developed, flexible system called the Excluder. We conducted the fishing trials in the Norway pout (Trisopterus esmarkii) small-meshed trawl fishery in the North Sea. Catch data were analysed by species and length using the catch comparison and catch ratio method. The Excluder significantly reduced the bycatch (in weight) relative to the standard grid for blue whiting (Micromesistius poutassou) (−35.6%), mackerel (Scomber scombrus) (−93.3%), horse mackerel (Trachurus trachurus) (−99.3%), herring (Clupea harengus) (−89.9%), haddock (Melanogrammus aeglefinus), (−98.6%), whiting (Merlangius merlangus) (−99.3%), cod (Gadus morhua) (−97.1%), European hake (Merluccius merluccius) (−98.0%), and greater argentine (Argentina sphyraena) (−24.5%). For Norway pout there was a marginal decrease in the overall catch efficiency of −1.4%. The observed bycatch reduction efficiency is explained by the larger sorting area of the Excluder relative to the grid's area and by the differences in behaviour between Norway pout and the bycatch species. While it contributes to reduce bycatch of quota regulated species, the Excluder also can potentially affect the profitability of the fishery. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Grimaldo, Eduardo Brinkhof, Jesse Herrmann, Bent Cerbule, Kristine Grimsmo, Leif Pettersen, Hermann |
author_facet |
Grimaldo, Eduardo Brinkhof, Jesse Herrmann, Bent Cerbule, Kristine Grimsmo, Leif Pettersen, Hermann |
author_sort |
Grimaldo, Eduardo |
title |
Improved bycatch reduction in the mixed demersal trawl fishery for Norway pout (Trisopterus esmarkii) |
title_short |
Improved bycatch reduction in the mixed demersal trawl fishery for Norway pout (Trisopterus esmarkii) |
title_full |
Improved bycatch reduction in the mixed demersal trawl fishery for Norway pout (Trisopterus esmarkii) |
title_fullStr |
Improved bycatch reduction in the mixed demersal trawl fishery for Norway pout (Trisopterus esmarkii) |
title_full_unstemmed |
Improved bycatch reduction in the mixed demersal trawl fishery for Norway pout (Trisopterus esmarkii) |
title_sort |
improved bycatch reduction in the mixed demersal trawl fishery for norway pout (trisopterus esmarkii) |
publisher |
Elsevier |
publishDate |
2022 |
url |
https://hdl.handle.net/11250/3045661 https://doi.org/10.1016/j.ecss.2022.108189 |
long_lat |
ENVELOPE(15.612,15.612,66.797,66.797) |
geographic |
Norway Argentina Argentine Hake |
geographic_facet |
Norway Argentina Argentine Hake |
genre |
Gadus morhua |
genre_facet |
Gadus morhua |
op_source |
1-10 281 Estuarine, Coastal and Shelf Science |
op_relation |
Estuarine, Coastal and Shelf Science. 2022, 281 1-10. urn:issn:0272-7714 https://hdl.handle.net/11250/3045661 https://doi.org/10.1016/j.ecss.2022.108189 cristin:2104355 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © 2022 The Authors. Published by Elsevier Ltd. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1016/j.ecss.2022.108189 |
container_title |
Estuarine, Coastal and Shelf Science |
container_volume |
281 |
container_start_page |
108189 |
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1766005551547809792 |