Feeding interactions between Atlantic salmon ( Salmo salar) postsmolts and other planktivorous fish in the Northeast Atlantic
In recent decades, there has been a decline in the marine growth of Atlantic salmon (Salmo salar) over large parts of the distribution range. One hypothesis for this reduced growth is increased interspecific competition with other planktivorous pelagic fish in the ocean. Here, interactions between s...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Language: | English |
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2021
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Online Access: | http://dx.doi.org/10.1139/cjfas-2020-0037 https://cdnsciencepub.com/doi/full-xml/10.1139/cjfas-2020-0037 https://cdnsciencepub.com/doi/pdf/10.1139/cjfas-2020-0037 |
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crcansciencepubl:10.1139/cjfas-2020-0037 2024-09-15T17:56:07+00:00 Feeding interactions between Atlantic salmon ( Salmo salar) postsmolts and other planktivorous fish in the Northeast Atlantic Utne, Kjell Rong Thomas, Katie Jacobsen, Jan Arge Fall, Johanna Maoiléidigh, Niall Ó. Broms, Cecilie Thorsen Melle, Webjørn 2021 http://dx.doi.org/10.1139/cjfas-2020-0037 https://cdnsciencepub.com/doi/full-xml/10.1139/cjfas-2020-0037 https://cdnsciencepub.com/doi/pdf/10.1139/cjfas-2020-0037 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 78, issue 3, page 255-268 ISSN 0706-652X 1205-7533 journal-article 2021 crcansciencepubl https://doi.org/10.1139/cjfas-2020-0037 2024-09-05T04:11:17Z In recent decades, there has been a decline in the marine growth of Atlantic salmon (Salmo salar) over large parts of the distribution range. One hypothesis for this reduced growth is increased interspecific competition with other planktivorous pelagic fish in the ocean. Here, interactions between salmon postsmolts and other pelagic fish (mackerel (Scomber scombrus) and herring (Clupea harengus)) in the Northeast Atlantic were investigated. There was a low diet overlap between postsmolts and the two other planktivorous pelagic species. Both mackerel and herring were feeding predominantly on copepods and other small zooplankton, while salmon were feeding mostly on fish larvae. All three species feed on euphausiids and amphipods. Furthermore, postsmolts geographically overlapped with mackerel but had a low geographic overlap with herring. There was no correlation between the abundance or survival of salmon from key index rivers and the abundance of pelagic fish. This study did not find evidence to support the hypothesis that observed temporal changes in marine growth and survival of salmon can be explained by feeding interactions with pelagic fish. Article in Journal/Newspaper Atlantic salmon Northeast Atlantic Salmo salar Copepods Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 78 3 255 268 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
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English |
description |
In recent decades, there has been a decline in the marine growth of Atlantic salmon (Salmo salar) over large parts of the distribution range. One hypothesis for this reduced growth is increased interspecific competition with other planktivorous pelagic fish in the ocean. Here, interactions between salmon postsmolts and other pelagic fish (mackerel (Scomber scombrus) and herring (Clupea harengus)) in the Northeast Atlantic were investigated. There was a low diet overlap between postsmolts and the two other planktivorous pelagic species. Both mackerel and herring were feeding predominantly on copepods and other small zooplankton, while salmon were feeding mostly on fish larvae. All three species feed on euphausiids and amphipods. Furthermore, postsmolts geographically overlapped with mackerel but had a low geographic overlap with herring. There was no correlation between the abundance or survival of salmon from key index rivers and the abundance of pelagic fish. This study did not find evidence to support the hypothesis that observed temporal changes in marine growth and survival of salmon can be explained by feeding interactions with pelagic fish. |
format |
Article in Journal/Newspaper |
author |
Utne, Kjell Rong Thomas, Katie Jacobsen, Jan Arge Fall, Johanna Maoiléidigh, Niall Ó. Broms, Cecilie Thorsen Melle, Webjørn |
spellingShingle |
Utne, Kjell Rong Thomas, Katie Jacobsen, Jan Arge Fall, Johanna Maoiléidigh, Niall Ó. Broms, Cecilie Thorsen Melle, Webjørn Feeding interactions between Atlantic salmon ( Salmo salar) postsmolts and other planktivorous fish in the Northeast Atlantic |
author_facet |
Utne, Kjell Rong Thomas, Katie Jacobsen, Jan Arge Fall, Johanna Maoiléidigh, Niall Ó. Broms, Cecilie Thorsen Melle, Webjørn |
author_sort |
Utne, Kjell Rong |
title |
Feeding interactions between Atlantic salmon ( Salmo salar) postsmolts and other planktivorous fish in the Northeast Atlantic |
title_short |
Feeding interactions between Atlantic salmon ( Salmo salar) postsmolts and other planktivorous fish in the Northeast Atlantic |
title_full |
Feeding interactions between Atlantic salmon ( Salmo salar) postsmolts and other planktivorous fish in the Northeast Atlantic |
title_fullStr |
Feeding interactions between Atlantic salmon ( Salmo salar) postsmolts and other planktivorous fish in the Northeast Atlantic |
title_full_unstemmed |
Feeding interactions between Atlantic salmon ( Salmo salar) postsmolts and other planktivorous fish in the Northeast Atlantic |
title_sort |
feeding interactions between atlantic salmon ( salmo salar) postsmolts and other planktivorous fish in the northeast atlantic |
publisher |
Canadian Science Publishing |
publishDate |
2021 |
url |
http://dx.doi.org/10.1139/cjfas-2020-0037 https://cdnsciencepub.com/doi/full-xml/10.1139/cjfas-2020-0037 https://cdnsciencepub.com/doi/pdf/10.1139/cjfas-2020-0037 |
genre |
Atlantic salmon Northeast Atlantic Salmo salar Copepods |
genre_facet |
Atlantic salmon Northeast Atlantic Salmo salar Copepods |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 78, issue 3, page 255-268 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cjfas-2020-0037 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
78 |
container_issue |
3 |
container_start_page |
255 |
op_container_end_page |
268 |
_version_ |
1810432333517422592 |