Artificial light improves size selection for northern shrimp (Pandalus borealis) in trawls
Size selection in the northern shrimp (Pandalus borealis) trawl fisheries is a widely studied topic. While the focus has largely been on codend and grid selectivity, studies have shown the importance of other design changes and the application of artificial light to evoke behavioural responses. LED...
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ftimr:oai:imr.brage.unit.no:11250/2823620 2023-05-15T17:43:55+02:00 Artificial light improves size selection for northern shrimp (Pandalus borealis) in trawls Ingólfsson, Ólafur Arnar Jørgensen, Terje Sistiaga, Manu Berrondo Kvalvik, Liz Beate Kolstad 2021 application/pdf https://hdl.handle.net/11250/2823620 https://doi.org/10.1139/cjfas-2020-0458 eng eng Canadian Journal of Fisheries and Aquatic Sciences. 2021, . urn:issn:0706-652X https://hdl.handle.net/11250/2823620 https://doi.org/10.1139/cjfas-2020-0458 cristin:1945055 28 Canadian Journal of Fisheries and Aquatic Sciences Peer reviewed Journal article 2021 ftimr https://doi.org/10.1139/cjfas-2020-0458 2021-10-20T22:36:23Z Size selection in the northern shrimp (Pandalus borealis) trawl fisheries is a widely studied topic. While the focus has largely been on codend and grid selectivity, studies have shown the importance of other design changes and the application of artificial light to evoke behavioural responses. LED lights of three different colours; green (~470–580 nm), white (~425–750 nm) and red (~580–670 nm), were mounted in the belly section of a shrimp trawl to investigate their influence on the overall selectivity of the trawl. The study was conducted using a twin-trawl setup, one with light and the other without light. For catch-comparison analysis, a polynomial regression with random effects was applied. The number of valid hauls with green, white and red lights were eleven, eight, and nine, respectively. All lights tested significantly affected the length-dependent retention of shrimp. Green light had the greatest effect, red the least. Significant loss was observed for shrimp below 17.5 mm carapace length (CL) for green light, 19.5 mm CL for white and 20.8 mm CL for red light. acceptedVersion Article in Journal/Newspaper northern shrimp Pandalus borealis Institute for Marine Research: Brage IMR Canadian Journal of Fisheries and Aquatic Sciences 1 8 |
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Institute for Marine Research: Brage IMR |
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English |
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Size selection in the northern shrimp (Pandalus borealis) trawl fisheries is a widely studied topic. While the focus has largely been on codend and grid selectivity, studies have shown the importance of other design changes and the application of artificial light to evoke behavioural responses. LED lights of three different colours; green (~470–580 nm), white (~425–750 nm) and red (~580–670 nm), were mounted in the belly section of a shrimp trawl to investigate their influence on the overall selectivity of the trawl. The study was conducted using a twin-trawl setup, one with light and the other without light. For catch-comparison analysis, a polynomial regression with random effects was applied. The number of valid hauls with green, white and red lights were eleven, eight, and nine, respectively. All lights tested significantly affected the length-dependent retention of shrimp. Green light had the greatest effect, red the least. Significant loss was observed for shrimp below 17.5 mm carapace length (CL) for green light, 19.5 mm CL for white and 20.8 mm CL for red light. acceptedVersion |
format |
Article in Journal/Newspaper |
author |
Ingólfsson, Ólafur Arnar Jørgensen, Terje Sistiaga, Manu Berrondo Kvalvik, Liz Beate Kolstad |
spellingShingle |
Ingólfsson, Ólafur Arnar Jørgensen, Terje Sistiaga, Manu Berrondo Kvalvik, Liz Beate Kolstad Artificial light improves size selection for northern shrimp (Pandalus borealis) in trawls |
author_facet |
Ingólfsson, Ólafur Arnar Jørgensen, Terje Sistiaga, Manu Berrondo Kvalvik, Liz Beate Kolstad |
author_sort |
Ingólfsson, Ólafur Arnar |
title |
Artificial light improves size selection for northern shrimp (Pandalus borealis) in trawls |
title_short |
Artificial light improves size selection for northern shrimp (Pandalus borealis) in trawls |
title_full |
Artificial light improves size selection for northern shrimp (Pandalus borealis) in trawls |
title_fullStr |
Artificial light improves size selection for northern shrimp (Pandalus borealis) in trawls |
title_full_unstemmed |
Artificial light improves size selection for northern shrimp (Pandalus borealis) in trawls |
title_sort |
artificial light improves size selection for northern shrimp (pandalus borealis) in trawls |
publishDate |
2021 |
url |
https://hdl.handle.net/11250/2823620 https://doi.org/10.1139/cjfas-2020-0458 |
genre |
northern shrimp Pandalus borealis |
genre_facet |
northern shrimp Pandalus borealis |
op_source |
28 Canadian Journal of Fisheries and Aquatic Sciences |
op_relation |
Canadian Journal of Fisheries and Aquatic Sciences. 2021, . urn:issn:0706-652X https://hdl.handle.net/11250/2823620 https://doi.org/10.1139/cjfas-2020-0458 cristin:1945055 |
op_doi |
https://doi.org/10.1139/cjfas-2020-0458 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
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1 |
op_container_end_page |
8 |
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1766146090603642880 |