Wintertime growth in Atlantic salmon under changing climate: the importance of ice cover for individual growth dynamics
Understanding the dynamic nature of individual growth in stream-dwelling salmonids may help forecast consequences of climate change on northern fish populations. Here, we performed an experimental capture–mark–recapture study in Atlantic salmon (Salmo salar) to quantify factors influencing wintertim...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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crcansciencepubl:10.1139/cjfas-2020-0258 2024-04-28T08:13:16+00:00 Wintertime growth in Atlantic salmon under changing climate: the importance of ice cover for individual growth dynamics Härkönen, Laura Louhi, Pauliina Huusko, Riina Huusko, Ari 2021 http://dx.doi.org/10.1139/cjfas-2020-0258 https://cdnsciencepub.com/doi/full-xml/10.1139/cjfas-2020-0258 https://cdnsciencepub.com/doi/pdf/10.1139/cjfas-2020-0258 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 78, issue 10, page 1479-1485 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 2021 crcansciencepubl https://doi.org/10.1139/cjfas-2020-0258 2024-04-02T06:55:54Z Understanding the dynamic nature of individual growth in stream-dwelling salmonids may help forecast consequences of climate change on northern fish populations. Here, we performed an experimental capture–mark–recapture study in Atlantic salmon (Salmo salar) to quantify factors influencing wintertime growth variation among juveniles under different scenarios for ice-cover reduction. We applied multiple imputation to simulate missing size observations for unrecaptured fish and to account for individual-level variation in growth rates. The salmon parr exhibited substantial body length shrinkage in early winter, suppressed growth through midwinter, and increased growth rates in late winter and particularly in spring. Unexpectedly, the presence of ice cover had no direct effects on wintertime growth. Instead, our results implied increasing energetic costs with reducing ice cover; individuals exposed to absent or shortened ice-covered period gained mass at a lowered rate in spring, whereas the present, long ice-covered period was followed by rapid growth. This study emphasizes natural resilience of Atlantic salmon to wintertime environmental variation, which may help the species to cope with the reductions in ice-cover duration due to climate change. Article in Journal/Newspaper Atlantic salmon Salmo salar Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences |
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Open Polar |
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Canadian Science Publishing |
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language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
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Aquatic Science Ecology, Evolution, Behavior and Systematics Härkönen, Laura Louhi, Pauliina Huusko, Riina Huusko, Ari Wintertime growth in Atlantic salmon under changing climate: the importance of ice cover for individual growth dynamics |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Understanding the dynamic nature of individual growth in stream-dwelling salmonids may help forecast consequences of climate change on northern fish populations. Here, we performed an experimental capture–mark–recapture study in Atlantic salmon (Salmo salar) to quantify factors influencing wintertime growth variation among juveniles under different scenarios for ice-cover reduction. We applied multiple imputation to simulate missing size observations for unrecaptured fish and to account for individual-level variation in growth rates. The salmon parr exhibited substantial body length shrinkage in early winter, suppressed growth through midwinter, and increased growth rates in late winter and particularly in spring. Unexpectedly, the presence of ice cover had no direct effects on wintertime growth. Instead, our results implied increasing energetic costs with reducing ice cover; individuals exposed to absent or shortened ice-covered period gained mass at a lowered rate in spring, whereas the present, long ice-covered period was followed by rapid growth. This study emphasizes natural resilience of Atlantic salmon to wintertime environmental variation, which may help the species to cope with the reductions in ice-cover duration due to climate change. |
format |
Article in Journal/Newspaper |
author |
Härkönen, Laura Louhi, Pauliina Huusko, Riina Huusko, Ari |
author_facet |
Härkönen, Laura Louhi, Pauliina Huusko, Riina Huusko, Ari |
author_sort |
Härkönen, Laura |
title |
Wintertime growth in Atlantic salmon under changing climate: the importance of ice cover for individual growth dynamics |
title_short |
Wintertime growth in Atlantic salmon under changing climate: the importance of ice cover for individual growth dynamics |
title_full |
Wintertime growth in Atlantic salmon under changing climate: the importance of ice cover for individual growth dynamics |
title_fullStr |
Wintertime growth in Atlantic salmon under changing climate: the importance of ice cover for individual growth dynamics |
title_full_unstemmed |
Wintertime growth in Atlantic salmon under changing climate: the importance of ice cover for individual growth dynamics |
title_sort |
wintertime growth in atlantic salmon under changing climate: the importance of ice cover for individual growth dynamics |
publisher |
Canadian Science Publishing |
publishDate |
2021 |
url |
http://dx.doi.org/10.1139/cjfas-2020-0258 https://cdnsciencepub.com/doi/full-xml/10.1139/cjfas-2020-0258 https://cdnsciencepub.com/doi/pdf/10.1139/cjfas-2020-0258 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 78, issue 10, page 1479-1485 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cjfas-2020-0258 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
_version_ |
1797579848353316864 |