Relationship between marine growth and sea survival of two anadromous salmonid fish species
This study found empirical evidence supporting the “growth–survival” paradigm in the marine phase of Arctic char (Salvelinus alpinus) and brown trout (Salmo trutta). The paradigm postulates that larger or faster-growing individuals are more likely to survive than smaller or slower-growing conspecifi...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Canadian Science Publishing
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Online Access: | http://dx.doi.org/10.1139/cjfas-2016-0408 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2016-0408 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2016-0408 |
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crcansciencepubl:10.1139/cjfas-2016-0408 2024-09-15T18:33:06+00:00 Relationship between marine growth and sea survival of two anadromous salmonid fish species Jensen, Arne Johan Finstad, Bengt Fiske, Peder Forseth, Torbjørn Rikardsen, Audun Håvard Ugedal, Ola 2018 http://dx.doi.org/10.1139/cjfas-2016-0408 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2016-0408 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2016-0408 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 75, issue 4, page 621-628 ISSN 0706-652X 1205-7533 journal-article 2018 crcansciencepubl https://doi.org/10.1139/cjfas-2016-0408 2024-06-27T04:11:03Z This study found empirical evidence supporting the “growth–survival” paradigm in the marine phase of Arctic char (Salvelinus alpinus) and brown trout (Salmo trutta). The paradigm postulates that larger or faster-growing individuals are more likely to survive than smaller or slower-growing conspecifics. The study employed long-term (25 year) capture data from a trap in the River Halselva in Norway during annual migration between marine and freshwater environments. Similar results were found for both species. Growth during the sea sojourn and return rates were positively correlated, linking increased survival with growth. Specific growth rate, survival, and duration of the sea sojourn of first-time migrants were correlated, suggesting that common environmental conditions at sea influence annual fish productivity. Freshwater and sea temperatures affected migration timing, whereas annual variation in marine growth and survival did not correlate with temperatures. This suggests that other factors such as variation in energy intake were the main source of annual growth variations. Moreover, the marine growth rate of the two species may signal annual overall fjord ecosystem production, especially related to their main prey. Article in Journal/Newspaper Salvelinus alpinus Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 75 4 621 628 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
This study found empirical evidence supporting the “growth–survival” paradigm in the marine phase of Arctic char (Salvelinus alpinus) and brown trout (Salmo trutta). The paradigm postulates that larger or faster-growing individuals are more likely to survive than smaller or slower-growing conspecifics. The study employed long-term (25 year) capture data from a trap in the River Halselva in Norway during annual migration between marine and freshwater environments. Similar results were found for both species. Growth during the sea sojourn and return rates were positively correlated, linking increased survival with growth. Specific growth rate, survival, and duration of the sea sojourn of first-time migrants were correlated, suggesting that common environmental conditions at sea influence annual fish productivity. Freshwater and sea temperatures affected migration timing, whereas annual variation in marine growth and survival did not correlate with temperatures. This suggests that other factors such as variation in energy intake were the main source of annual growth variations. Moreover, the marine growth rate of the two species may signal annual overall fjord ecosystem production, especially related to their main prey. |
format |
Article in Journal/Newspaper |
author |
Jensen, Arne Johan Finstad, Bengt Fiske, Peder Forseth, Torbjørn Rikardsen, Audun Håvard Ugedal, Ola |
spellingShingle |
Jensen, Arne Johan Finstad, Bengt Fiske, Peder Forseth, Torbjørn Rikardsen, Audun Håvard Ugedal, Ola Relationship between marine growth and sea survival of two anadromous salmonid fish species |
author_facet |
Jensen, Arne Johan Finstad, Bengt Fiske, Peder Forseth, Torbjørn Rikardsen, Audun Håvard Ugedal, Ola |
author_sort |
Jensen, Arne Johan |
title |
Relationship between marine growth and sea survival of two anadromous salmonid fish species |
title_short |
Relationship between marine growth and sea survival of two anadromous salmonid fish species |
title_full |
Relationship between marine growth and sea survival of two anadromous salmonid fish species |
title_fullStr |
Relationship between marine growth and sea survival of two anadromous salmonid fish species |
title_full_unstemmed |
Relationship between marine growth and sea survival of two anadromous salmonid fish species |
title_sort |
relationship between marine growth and sea survival of two anadromous salmonid fish species |
publisher |
Canadian Science Publishing |
publishDate |
2018 |
url |
http://dx.doi.org/10.1139/cjfas-2016-0408 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2016-0408 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2016-0408 |
genre |
Salvelinus alpinus |
genre_facet |
Salvelinus alpinus |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 75, issue 4, page 621-628 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cjfas-2016-0408 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
75 |
container_issue |
4 |
container_start_page |
621 |
op_container_end_page |
628 |
_version_ |
1810474846770954240 |