Migration strategies of brown trout ( Salmo trutta) in a subarctic river system as revealed by stable isotope analysis
Abstract We estimated the proportions of anadromous and freshwater‐resident brown trout ( Salmo trutta ) in different parts of the subarctic River Näätämöjoki/Neidenelva system (Finland and Norway) using carbon, nitrogen and hydrogen stable isotope analyses of archived scales as identifiers of migra...
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crwiley:10.1111/eff.12426 2024-09-15T18:37:53+00:00 Migration strategies of brown trout ( Salmo trutta) in a subarctic river system as revealed by stable isotope analysis Ruokonen, Timo J. Kiljunen, Mikko Erkinaro, Jaakko Orell, Panu Sivonen, Olli Vestola, Eero Jones, Roger I. Maj ja Tor Nesslingin Säätiö 2018 http://dx.doi.org/10.1111/eff.12426 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Feff.12426 https://onlinelibrary.wiley.com/doi/pdf/10.1111/eff.12426 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/eff.12426 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Ecology of Freshwater Fish volume 28, issue 1, page 53-61 ISSN 0906-6691 1600-0633 journal-article 2018 crwiley https://doi.org/10.1111/eff.12426 2024-07-18T04:26:55Z Abstract We estimated the proportions of anadromous and freshwater‐resident brown trout ( Salmo trutta ) in different parts of the subarctic River Näätämöjoki/Neidenelva system (Finland and Norway) using carbon, nitrogen and hydrogen stable isotope analyses of archived scales as identifiers of migration strategy. Our results showed that carbon stable isotope values were the best predictor of migration strategy. Most individuals fell into two clearly distinct groups representing anadromous (47%) or freshwater‐resident (42%) individuals, but some fish had intermediate carbon values suggesting repeated movement between freshwater and the sea. The proportion of anadromous individuals decreased steadily with distance from the sea forming a spatial continuum in migration strategies which is probably maintained by the combination of several factors such as divergent availability of food resources, variable migration costs and genetic differences. These within‐catchment differences in migration strategies should be taken into account in fisheries management practices. Article in Journal/Newspaper Subarctic Wiley Online Library Ecology of Freshwater Fish 28 1 53 61 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract We estimated the proportions of anadromous and freshwater‐resident brown trout ( Salmo trutta ) in different parts of the subarctic River Näätämöjoki/Neidenelva system (Finland and Norway) using carbon, nitrogen and hydrogen stable isotope analyses of archived scales as identifiers of migration strategy. Our results showed that carbon stable isotope values were the best predictor of migration strategy. Most individuals fell into two clearly distinct groups representing anadromous (47%) or freshwater‐resident (42%) individuals, but some fish had intermediate carbon values suggesting repeated movement between freshwater and the sea. The proportion of anadromous individuals decreased steadily with distance from the sea forming a spatial continuum in migration strategies which is probably maintained by the combination of several factors such as divergent availability of food resources, variable migration costs and genetic differences. These within‐catchment differences in migration strategies should be taken into account in fisheries management practices. |
author2 |
Maj ja Tor Nesslingin Säätiö |
format |
Article in Journal/Newspaper |
author |
Ruokonen, Timo J. Kiljunen, Mikko Erkinaro, Jaakko Orell, Panu Sivonen, Olli Vestola, Eero Jones, Roger I. |
spellingShingle |
Ruokonen, Timo J. Kiljunen, Mikko Erkinaro, Jaakko Orell, Panu Sivonen, Olli Vestola, Eero Jones, Roger I. Migration strategies of brown trout ( Salmo trutta) in a subarctic river system as revealed by stable isotope analysis |
author_facet |
Ruokonen, Timo J. Kiljunen, Mikko Erkinaro, Jaakko Orell, Panu Sivonen, Olli Vestola, Eero Jones, Roger I. |
author_sort |
Ruokonen, Timo J. |
title |
Migration strategies of brown trout ( Salmo trutta) in a subarctic river system as revealed by stable isotope analysis |
title_short |
Migration strategies of brown trout ( Salmo trutta) in a subarctic river system as revealed by stable isotope analysis |
title_full |
Migration strategies of brown trout ( Salmo trutta) in a subarctic river system as revealed by stable isotope analysis |
title_fullStr |
Migration strategies of brown trout ( Salmo trutta) in a subarctic river system as revealed by stable isotope analysis |
title_full_unstemmed |
Migration strategies of brown trout ( Salmo trutta) in a subarctic river system as revealed by stable isotope analysis |
title_sort |
migration strategies of brown trout ( salmo trutta) in a subarctic river system as revealed by stable isotope analysis |
publisher |
Wiley |
publishDate |
2018 |
url |
http://dx.doi.org/10.1111/eff.12426 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Feff.12426 https://onlinelibrary.wiley.com/doi/pdf/10.1111/eff.12426 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/eff.12426 |
genre |
Subarctic |
genre_facet |
Subarctic |
op_source |
Ecology of Freshwater Fish volume 28, issue 1, page 53-61 ISSN 0906-6691 1600-0633 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/eff.12426 |
container_title |
Ecology of Freshwater Fish |
container_volume |
28 |
container_issue |
1 |
container_start_page |
53 |
op_container_end_page |
61 |
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1810482235339440128 |