Smaller bar spacings in a Nordmøre grid reduces the bycatch of redfish (Sebastes spp.) in the offshore Northern shrimp (Pandalus borealis) fishery of eastern Canada
The offshore Northern shrimp (Pandalus borealis) bottom trawl fishery in eastern Canada currently uses 22 and 28 mm bar spacing Nordmøre grids to limit bycatch from using small mesh codends. However, a recent rebound of juvenile redfish (Sebastes spp.), that can pass through the grids, has greatly i...
Published in: | Aquaculture and Fisheries |
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Language: | English |
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KeAi Communications Co., Ltd.
2023
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Online Access: | https://doi.org/10.1016/j.aaf.2023.01.009 https://doaj.org/article/130e8fd4e7004a8281affd0f02542540 |
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ftdoajarticles:oai:doaj.org/article:130e8fd4e7004a8281affd0f02542540 2023-06-11T04:15:22+02:00 Smaller bar spacings in a Nordmøre grid reduces the bycatch of redfish (Sebastes spp.) in the offshore Northern shrimp (Pandalus borealis) fishery of eastern Canada Tomas Araya-Schmidt Shannon M. Bayse Paul D. Winger Colin H. Frank 2023-11-01T00:00:00Z https://doi.org/10.1016/j.aaf.2023.01.009 https://doaj.org/article/130e8fd4e7004a8281affd0f02542540 EN eng KeAi Communications Co., Ltd. http://www.sciencedirect.com/science/article/pii/S2468550X23000205 https://doaj.org/toc/2468-550X 2468-550X doi:10.1016/j.aaf.2023.01.009 https://doaj.org/article/130e8fd4e7004a8281affd0f02542540 Aquaculture and Fisheries, Vol 8, Iss 6, Pp 661-671 (2023) Size selectivity Twin trawling Catch comparison Bycatch reduction device Aquaculture. Fisheries. Angling SH1-691 article 2023 ftdoajarticles https://doi.org/10.1016/j.aaf.2023.01.009 2023-04-23T00:34:10Z The offshore Northern shrimp (Pandalus borealis) bottom trawl fishery in eastern Canada currently uses 22 and 28 mm bar spacing Nordmøre grids to limit bycatch from using small mesh codends. However, a recent rebound of juvenile redfish (Sebastes spp.), that can pass through the grids, has greatly increased bycatch. To address this concern, this study investigated the effectiveness of 17 and 15 mm bar spacing Nordmøre grids in a twin-trawl (paired) configuration against the traditional 22 mm bar spacing grid. Size selectivity analyses showed that the 17 and 15 mm grids resulted in no significant reduction in shrimp catch across all length classes. The 17 mm grid significantly reduced redfish bycatch for all length classes and the 15 mm grid significantly reduced redfish bycatch for individuals larger than 95 mm total length. Less redfish entered the codend with the experimental grids, however, the overlap in width between redfish and Northern shrimp limits the overall sorting efficiency of the grids, leaving some redfish still vulnerable to capture. Article in Journal/Newspaper northern shrimp Pandalus borealis Directory of Open Access Journals: DOAJ Articles Canada Nordmøre ENVELOPE(8.500,8.500,63.000,63.000) Aquaculture and Fisheries 8 6 661 671 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Size selectivity Twin trawling Catch comparison Bycatch reduction device Aquaculture. Fisheries. Angling SH1-691 |
spellingShingle |
Size selectivity Twin trawling Catch comparison Bycatch reduction device Aquaculture. Fisheries. Angling SH1-691 Tomas Araya-Schmidt Shannon M. Bayse Paul D. Winger Colin H. Frank Smaller bar spacings in a Nordmøre grid reduces the bycatch of redfish (Sebastes spp.) in the offshore Northern shrimp (Pandalus borealis) fishery of eastern Canada |
topic_facet |
Size selectivity Twin trawling Catch comparison Bycatch reduction device Aquaculture. Fisheries. Angling SH1-691 |
description |
The offshore Northern shrimp (Pandalus borealis) bottom trawl fishery in eastern Canada currently uses 22 and 28 mm bar spacing Nordmøre grids to limit bycatch from using small mesh codends. However, a recent rebound of juvenile redfish (Sebastes spp.), that can pass through the grids, has greatly increased bycatch. To address this concern, this study investigated the effectiveness of 17 and 15 mm bar spacing Nordmøre grids in a twin-trawl (paired) configuration against the traditional 22 mm bar spacing grid. Size selectivity analyses showed that the 17 and 15 mm grids resulted in no significant reduction in shrimp catch across all length classes. The 17 mm grid significantly reduced redfish bycatch for all length classes and the 15 mm grid significantly reduced redfish bycatch for individuals larger than 95 mm total length. Less redfish entered the codend with the experimental grids, however, the overlap in width between redfish and Northern shrimp limits the overall sorting efficiency of the grids, leaving some redfish still vulnerable to capture. |
format |
Article in Journal/Newspaper |
author |
Tomas Araya-Schmidt Shannon M. Bayse Paul D. Winger Colin H. Frank |
author_facet |
Tomas Araya-Schmidt Shannon M. Bayse Paul D. Winger Colin H. Frank |
author_sort |
Tomas Araya-Schmidt |
title |
Smaller bar spacings in a Nordmøre grid reduces the bycatch of redfish (Sebastes spp.) in the offshore Northern shrimp (Pandalus borealis) fishery of eastern Canada |
title_short |
Smaller bar spacings in a Nordmøre grid reduces the bycatch of redfish (Sebastes spp.) in the offshore Northern shrimp (Pandalus borealis) fishery of eastern Canada |
title_full |
Smaller bar spacings in a Nordmøre grid reduces the bycatch of redfish (Sebastes spp.) in the offshore Northern shrimp (Pandalus borealis) fishery of eastern Canada |
title_fullStr |
Smaller bar spacings in a Nordmøre grid reduces the bycatch of redfish (Sebastes spp.) in the offshore Northern shrimp (Pandalus borealis) fishery of eastern Canada |
title_full_unstemmed |
Smaller bar spacings in a Nordmøre grid reduces the bycatch of redfish (Sebastes spp.) in the offshore Northern shrimp (Pandalus borealis) fishery of eastern Canada |
title_sort |
smaller bar spacings in a nordmøre grid reduces the bycatch of redfish (sebastes spp.) in the offshore northern shrimp (pandalus borealis) fishery of eastern canada |
publisher |
KeAi Communications Co., Ltd. |
publishDate |
2023 |
url |
https://doi.org/10.1016/j.aaf.2023.01.009 https://doaj.org/article/130e8fd4e7004a8281affd0f02542540 |
long_lat |
ENVELOPE(8.500,8.500,63.000,63.000) |
geographic |
Canada Nordmøre |
geographic_facet |
Canada Nordmøre |
genre |
northern shrimp Pandalus borealis |
genre_facet |
northern shrimp Pandalus borealis |
op_source |
Aquaculture and Fisheries, Vol 8, Iss 6, Pp 661-671 (2023) |
op_relation |
http://www.sciencedirect.com/science/article/pii/S2468550X23000205 https://doaj.org/toc/2468-550X 2468-550X doi:10.1016/j.aaf.2023.01.009 https://doaj.org/article/130e8fd4e7004a8281affd0f02542540 |
op_doi |
https://doi.org/10.1016/j.aaf.2023.01.009 |
container_title |
Aquaculture and Fisheries |
container_volume |
8 |
container_issue |
6 |
container_start_page |
661 |
op_container_end_page |
671 |
_version_ |
1768372126411128832 |