Reduced Catch of Under-Sized Cod ( Gadus morhua) in Longlining by Using Artificial Bait
Three sizes of artificial bait incorporating shrimp flavour into polyurethane foam were compared with natural shrimp bait of the size used in commercial longlining. Fishing trials were conducted during the spring fishery for Atlantic cod (Gadus morhua) off the coast of Northern Norway. The small art...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Language: | English |
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Canadian Science Publishing
1990
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Online Access: | http://dx.doi.org/10.1139/f90-128 http://www.nrcresearchpress.com/doi/pdf/10.1139/f90-128 |
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crcansciencepubl:10.1139/f90-128 2024-09-15T17:55:30+00:00 Reduced Catch of Under-Sized Cod ( Gadus morhua) in Longlining by Using Artificial Bait Løkkeborg, Svein 1990 http://dx.doi.org/10.1139/f90-128 http://www.nrcresearchpress.com/doi/pdf/10.1139/f90-128 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 47, issue 6, page 1112-1115 ISSN 0706-652X 1205-7533 journal-article 1990 crcansciencepubl https://doi.org/10.1139/f90-128 2024-07-18T04:13:38Z Three sizes of artificial bait incorporating shrimp flavour into polyurethane foam were compared with natural shrimp bait of the size used in commercial longlining. Fishing trials were conducted during the spring fishery for Atlantic cod (Gadus morhua) off the coast of Northern Norway. The small artificial bait gave almost the same catch rate as natural shrimp bait, whereas artificial baits of larger sizes compared poorly. The length distribution of the catch was influenced by both bait type and bait size. Fewer small cod were caught on the artificial baits. There was no difference in the number of large cod. Mean cod length was therefore higher on the artificial baits and increasing the artificial bait size accentuated the difference. These effects are explained by different preferences with regard to prey species and size between small and large cod. The size selective effects of bait type and bait size are discussed in relation to conservation aspects. Article in Journal/Newspaper atlantic cod Gadus morhua Northern Norway Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 47 6 1112 1115 |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
Three sizes of artificial bait incorporating shrimp flavour into polyurethane foam were compared with natural shrimp bait of the size used in commercial longlining. Fishing trials were conducted during the spring fishery for Atlantic cod (Gadus morhua) off the coast of Northern Norway. The small artificial bait gave almost the same catch rate as natural shrimp bait, whereas artificial baits of larger sizes compared poorly. The length distribution of the catch was influenced by both bait type and bait size. Fewer small cod were caught on the artificial baits. There was no difference in the number of large cod. Mean cod length was therefore higher on the artificial baits and increasing the artificial bait size accentuated the difference. These effects are explained by different preferences with regard to prey species and size between small and large cod. The size selective effects of bait type and bait size are discussed in relation to conservation aspects. |
format |
Article in Journal/Newspaper |
author |
Løkkeborg, Svein |
spellingShingle |
Løkkeborg, Svein Reduced Catch of Under-Sized Cod ( Gadus morhua) in Longlining by Using Artificial Bait |
author_facet |
Løkkeborg, Svein |
author_sort |
Løkkeborg, Svein |
title |
Reduced Catch of Under-Sized Cod ( Gadus morhua) in Longlining by Using Artificial Bait |
title_short |
Reduced Catch of Under-Sized Cod ( Gadus morhua) in Longlining by Using Artificial Bait |
title_full |
Reduced Catch of Under-Sized Cod ( Gadus morhua) in Longlining by Using Artificial Bait |
title_fullStr |
Reduced Catch of Under-Sized Cod ( Gadus morhua) in Longlining by Using Artificial Bait |
title_full_unstemmed |
Reduced Catch of Under-Sized Cod ( Gadus morhua) in Longlining by Using Artificial Bait |
title_sort |
reduced catch of under-sized cod ( gadus morhua) in longlining by using artificial bait |
publisher |
Canadian Science Publishing |
publishDate |
1990 |
url |
http://dx.doi.org/10.1139/f90-128 http://www.nrcresearchpress.com/doi/pdf/10.1139/f90-128 |
genre |
atlantic cod Gadus morhua Northern Norway |
genre_facet |
atlantic cod Gadus morhua Northern Norway |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 47, issue 6, page 1112-1115 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f90-128 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
47 |
container_issue |
6 |
container_start_page |
1112 |
op_container_end_page |
1115 |
_version_ |
1810431776072400896 |