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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Elsevier B.V. on behalf of KeAi Communications Co., Ltd.
2023
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Online Access: | https://research.library.mun.ca/16057/ https://research.library.mun.ca/16057/1/Smaller%20bar%20spacings%20in%20a%20Nordmore%20grid%20reduces%20the%20bycatch%20of%20redfish%20%28Sebastes%20spp.%29.pdf https://doi.org/10.1016/j.aaf.2023.01.009 |
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ftmemorialuniv:oai:research.library.mun.ca:16057 2024-04-21T08:08:36+00:00 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 Araya-Schmidt, Tomas Bayse, Shannon M. Winger, Paul D. Frank, Colin H. 2023-11 application/pdf https://research.library.mun.ca/16057/ https://research.library.mun.ca/16057/1/Smaller%20bar%20spacings%20in%20a%20Nordmore%20grid%20reduces%20the%20bycatch%20of%20redfish%20%28Sebastes%20spp.%29.pdf https://doi.org/10.1016/j.aaf.2023.01.009 en eng Elsevier B.V. on behalf of KeAi Communications Co., Ltd. https://research.library.mun.ca/16057/1/Smaller%20bar%20spacings%20in%20a%20Nordmore%20grid%20reduces%20the%20bycatch%20of%20redfish%20%28Sebastes%20spp.%29.pdf Araya-Schmidt, Tomas <https://research.library.mun.ca/view/creator_az/Araya-Schmidt=3ATomas=3A=3A.html> and Bayse, Shannon M. <https://research.library.mun.ca/view/creator_az/Bayse=3AShannon_M=2E=3A=3A.html> and Winger, Paul D. <https://research.library.mun.ca/view/creator_az/Winger=3APaul_D=2E=3A=3A.html> and Frank, Colin H. <https://research.library.mun.ca/view/creator_az/Frank=3AColin_H=2E=3A=3A.html> (2023) 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. Aquaculture and Fisheries, 8 (6). pp. 661-671. ISSN 2468-550X cc_by_nc_nd Article PeerReviewed 2023 ftmemorialuniv https://doi.org/10.1016/j.aaf.2023.01.009 2024-03-27T17:51:20Z 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 Memorial University of Newfoundland: Research Repository Aquaculture and Fisheries 8 6 661 671 |
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Open Polar |
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Memorial University of Newfoundland: Research Repository |
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ftmemorialuniv |
language |
English |
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 |
Araya-Schmidt, Tomas Bayse, Shannon M. Winger, Paul D. Frank, Colin H. |
spellingShingle |
Araya-Schmidt, Tomas Bayse, Shannon M. Winger, Paul D. Frank, Colin H. 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 |
author_facet |
Araya-Schmidt, Tomas Bayse, Shannon M. Winger, Paul D. Frank, Colin H. |
author_sort |
Araya-Schmidt, Tomas |
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 |
Elsevier B.V. on behalf of KeAi Communications Co., Ltd. |
publishDate |
2023 |
url |
https://research.library.mun.ca/16057/ https://research.library.mun.ca/16057/1/Smaller%20bar%20spacings%20in%20a%20Nordmore%20grid%20reduces%20the%20bycatch%20of%20redfish%20%28Sebastes%20spp.%29.pdf https://doi.org/10.1016/j.aaf.2023.01.009 |
genre |
northern shrimp Pandalus borealis |
genre_facet |
northern shrimp Pandalus borealis |
op_relation |
https://research.library.mun.ca/16057/1/Smaller%20bar%20spacings%20in%20a%20Nordmore%20grid%20reduces%20the%20bycatch%20of%20redfish%20%28Sebastes%20spp.%29.pdf Araya-Schmidt, Tomas <https://research.library.mun.ca/view/creator_az/Araya-Schmidt=3ATomas=3A=3A.html> and Bayse, Shannon M. <https://research.library.mun.ca/view/creator_az/Bayse=3AShannon_M=2E=3A=3A.html> and Winger, Paul D. <https://research.library.mun.ca/view/creator_az/Winger=3APaul_D=2E=3A=3A.html> and Frank, Colin H. <https://research.library.mun.ca/view/creator_az/Frank=3AColin_H=2E=3A=3A.html> (2023) 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. Aquaculture and Fisheries, 8 (6). pp. 661-671. ISSN 2468-550X |
op_rights |
cc_by_nc_nd |
op_doi |
https://doi.org/10.1016/j.aaf.2023.01.009 |
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Aquaculture and Fisheries |
container_volume |
8 |
container_issue |
6 |
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661 |
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