Attraction of cod Gadus morhua from coastal spawning grounds to salmon farms
Wild fish aggregate at aquaculture net-pens, but the underlying mechanisms are not fully understood. This study examined how salmon farms attract coastal Atlantic cod Gadus morhua from their inshore spawning grounds. Acoustic receivers were deployed at 5 known cod spawning grounds and 6 salmon Salmo...
Published in: | Aquaculture Environment Interactions |
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Online Access: | https://doi.org/10.3354/aei00440 https://doaj.org/article/4aa8c53f39a941d88c1ae88256821059 |
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ftdoajarticles:oai:doaj.org/article:4aa8c53f39a941d88c1ae88256821059 2023-05-15T15:27:39+02:00 Attraction of cod Gadus morhua from coastal spawning grounds to salmon farms JE Skjæraasen Ø Karlsen Ø Langangen S Meier KM Dunlop T van der Meeren NB Keeley MS Myksvoll G Dahle E Moland R Nilsen KM Elvik Schrøder RJ Bannister EM Olsen 2022-10-01T00:00:00Z https://doi.org/10.3354/aei00440 https://doaj.org/article/4aa8c53f39a941d88c1ae88256821059 EN eng Inter-Research https://www.int-res.com/abstracts/aei/v14/p229-242/ https://doaj.org/toc/1869-215X https://doaj.org/toc/1869-7534 1869-215X 1869-7534 doi:10.3354/aei00440 https://doaj.org/article/4aa8c53f39a941d88c1ae88256821059 Aquaculture Environment Interactions, Vol 14, Pp 229-242 (2022) Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5 article 2022 ftdoajarticles https://doi.org/10.3354/aei00440 2022-12-30T23:17:18Z Wild fish aggregate at aquaculture net-pens, but the underlying mechanisms are not fully understood. This study examined how salmon farms attract coastal Atlantic cod Gadus morhua from their inshore spawning grounds. Acoustic receivers were deployed at 5 known cod spawning grounds and 6 salmon Salmo salar farms located at varying distances from these grounds in a mid-Norway study site. Cod were caught at each spawning ground annually from 2017-2019, fitted with acoustic transmitters and released (n = 535). A total of 289 tagged cod (54%) were detected at the salmon farms, with more cod detected at farms closest to the focal spawning grounds and at operational farms. The latter result is likely linked to the availability of feeding opportunities at farm locations. Those cod that were detected by the receivers spent less time at farms farther from their release locations. For the farm-associated cod, 70% were detected for <1 wk at the farms. However, 48 cod spent >1 mo close to the farms, with 1 individual staying 720 d underneath the farm. A total of 135 cod visited 2 or more farms, with farms in proximity more connected in terms of inter-farm movement. Some of the cod utilizing these local spawning grounds likely have considerable dietary input from salmon feed. Article in Journal/Newspaper atlantic cod Gadus morhua Salmo salar Directory of Open Access Journals: DOAJ Articles Norway Aquaculture Environment Interactions 14 229 242 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5 |
spellingShingle |
Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5 JE Skjæraasen Ø Karlsen Ø Langangen S Meier KM Dunlop T van der Meeren NB Keeley MS Myksvoll G Dahle E Moland R Nilsen KM Elvik Schrøder RJ Bannister EM Olsen Attraction of cod Gadus morhua from coastal spawning grounds to salmon farms |
topic_facet |
Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5 |
description |
Wild fish aggregate at aquaculture net-pens, but the underlying mechanisms are not fully understood. This study examined how salmon farms attract coastal Atlantic cod Gadus morhua from their inshore spawning grounds. Acoustic receivers were deployed at 5 known cod spawning grounds and 6 salmon Salmo salar farms located at varying distances from these grounds in a mid-Norway study site. Cod were caught at each spawning ground annually from 2017-2019, fitted with acoustic transmitters and released (n = 535). A total of 289 tagged cod (54%) were detected at the salmon farms, with more cod detected at farms closest to the focal spawning grounds and at operational farms. The latter result is likely linked to the availability of feeding opportunities at farm locations. Those cod that were detected by the receivers spent less time at farms farther from their release locations. For the farm-associated cod, 70% were detected for <1 wk at the farms. However, 48 cod spent >1 mo close to the farms, with 1 individual staying 720 d underneath the farm. A total of 135 cod visited 2 or more farms, with farms in proximity more connected in terms of inter-farm movement. Some of the cod utilizing these local spawning grounds likely have considerable dietary input from salmon feed. |
format |
Article in Journal/Newspaper |
author |
JE Skjæraasen Ø Karlsen Ø Langangen S Meier KM Dunlop T van der Meeren NB Keeley MS Myksvoll G Dahle E Moland R Nilsen KM Elvik Schrøder RJ Bannister EM Olsen |
author_facet |
JE Skjæraasen Ø Karlsen Ø Langangen S Meier KM Dunlop T van der Meeren NB Keeley MS Myksvoll G Dahle E Moland R Nilsen KM Elvik Schrøder RJ Bannister EM Olsen |
author_sort |
JE Skjæraasen |
title |
Attraction of cod Gadus morhua from coastal spawning grounds to salmon farms |
title_short |
Attraction of cod Gadus morhua from coastal spawning grounds to salmon farms |
title_full |
Attraction of cod Gadus morhua from coastal spawning grounds to salmon farms |
title_fullStr |
Attraction of cod Gadus morhua from coastal spawning grounds to salmon farms |
title_full_unstemmed |
Attraction of cod Gadus morhua from coastal spawning grounds to salmon farms |
title_sort |
attraction of cod gadus morhua from coastal spawning grounds to salmon farms |
publisher |
Inter-Research |
publishDate |
2022 |
url |
https://doi.org/10.3354/aei00440 https://doaj.org/article/4aa8c53f39a941d88c1ae88256821059 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
atlantic cod Gadus morhua Salmo salar |
genre_facet |
atlantic cod Gadus morhua Salmo salar |
op_source |
Aquaculture Environment Interactions, Vol 14, Pp 229-242 (2022) |
op_relation |
https://www.int-res.com/abstracts/aei/v14/p229-242/ https://doaj.org/toc/1869-215X https://doaj.org/toc/1869-7534 1869-215X 1869-7534 doi:10.3354/aei00440 https://doaj.org/article/4aa8c53f39a941d88c1ae88256821059 |
op_doi |
https://doi.org/10.3354/aei00440 |
container_title |
Aquaculture Environment Interactions |
container_volume |
14 |
container_start_page |
229 |
op_container_end_page |
242 |
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1766358073873530880 |