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...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Canadian Science Publishing
2021
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1139/cjfas-2020-0458 https://cdnsciencepub.com/doi/full-xml/10.1139/cjfas-2020-0458 https://cdnsciencepub.com/doi/pdf/10.1139/cjfas-2020-0458 |
id |
crcansciencepubl:10.1139/cjfas-2020-0458 |
---|---|
record_format |
openpolar |
spelling |
crcansciencepubl:10.1139/cjfas-2020-0458 2024-06-23T07:55:35+00:00 Artificial light improves size selection for northern shrimp ( Pandalus borealis) in trawls Ingólfsson, Ólafur Arnar Jørgensen, Terje Sistiaga, Manu Kvalvik, Liz 2021 http://dx.doi.org/10.1139/cjfas-2020-0458 https://cdnsciencepub.com/doi/full-xml/10.1139/cjfas-2020-0458 https://cdnsciencepub.com/doi/pdf/10.1139/cjfas-2020-0458 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 78, issue 12, page 1910-1917 ISSN 0706-652X 1205-7533 journal-article 2021 crcansciencepubl https://doi.org/10.1139/cjfas-2020-0458 2024-05-24T13:05:53Z 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. Article in Journal/Newspaper northern shrimp Pandalus borealis Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
description |
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. |
format |
Article in Journal/Newspaper |
author |
Ingólfsson, Ólafur Arnar Jørgensen, Terje Sistiaga, Manu Kvalvik, Liz |
spellingShingle |
Ingólfsson, Ólafur Arnar Jørgensen, Terje Sistiaga, Manu Kvalvik, Liz Artificial light improves size selection for northern shrimp ( Pandalus borealis) in trawls |
author_facet |
Ingólfsson, Ólafur Arnar Jørgensen, Terje Sistiaga, Manu Kvalvik, Liz |
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 |
publisher |
Canadian Science Publishing |
publishDate |
2021 |
url |
http://dx.doi.org/10.1139/cjfas-2020-0458 https://cdnsciencepub.com/doi/full-xml/10.1139/cjfas-2020-0458 https://cdnsciencepub.com/doi/pdf/10.1139/cjfas-2020-0458 |
genre |
northern shrimp Pandalus borealis |
genre_facet |
northern shrimp Pandalus borealis |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 78, issue 12, page 1910-1917 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cjfas-2020-0458 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
_version_ |
1802648223143165952 |