The effect of physiological and environmental conditions on smolt migration in Atlantic salmon Salmo salar
Abstract Hydropower development has negatively influenced Atlantic salmon ( Salmo salar ) populations. Compensatory hatchery‐rearing programmes exist, but released fish suffer from high mortality that may be related to the lack of experience from natural environments in hatchery‐reared smolts and th...
Published in: | Ecology of Freshwater Fish |
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crwiley:10.1111/eff.12442 2024-06-02T08:03:35+00:00 The effect of physiological and environmental conditions on smolt migration in Atlantic salmon Salmo salar Persson, Lo Kagervall, Anders Leonardsson, Kjell Royan, Mansour Alanärä, Anders Svenska Forskningsrådet Formas Vattenfall Havs- och Vattenmyndigheten 2018 http://dx.doi.org/10.1111/eff.12442 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Feff.12442 https://onlinelibrary.wiley.com/doi/pdf/10.1111/eff.12442 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/eff.12442 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Ecology of Freshwater Fish volume 28, issue 2, page 190-199 ISSN 0906-6691 1600-0633 journal-article 2018 crwiley https://doi.org/10.1111/eff.12442 2024-05-03T10:54:55Z Abstract Hydropower development has negatively influenced Atlantic salmon ( Salmo salar ) populations. Compensatory hatchery‐rearing programmes exist, but released fish suffer from high mortality that may be related to the lack of experience from natural environments in hatchery‐reared smolts and their large body size and high energetic state. Here, we used acoustic telemetry to test how body size, energetic state, and the environmental conditions of the river affect migration in hatchery‐reared smolts. The study was conducted in three consecutive years between 2011 and 2013 in the lower part of the River Umeälven, Sweden. For individual fish, there was no effect of body size but the energetic state of the fish had a negative effect on sea entry. The most important factor affecting sea entry rate was the water discharge in the old river bed that differed among years. Smolts were more likely to enter the sea in years when the discharge was high or when the discharge increased substantially shortly after release. Hatchery‐reared fish had higher migration speed at a slower flowing section compared with a faster flowing section, which was likely a result of large hesitation to enter the rapid section. The increase in water discharge led to an increase in fish migration speed disproportional to the increase in water velocity. Our results highlight the importance of water discharge for the smolts during smolt migration, and we argue that concern should be given to migrating fish when managing regulated rivers. Article in Journal/Newspaper Atlantic salmon Salmo salar Wiley Online Library Umeälven ENVELOPE(15.133,15.133,65.767,65.767) Ecology of Freshwater Fish 28 2 190 199 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Hydropower development has negatively influenced Atlantic salmon ( Salmo salar ) populations. Compensatory hatchery‐rearing programmes exist, but released fish suffer from high mortality that may be related to the lack of experience from natural environments in hatchery‐reared smolts and their large body size and high energetic state. Here, we used acoustic telemetry to test how body size, energetic state, and the environmental conditions of the river affect migration in hatchery‐reared smolts. The study was conducted in three consecutive years between 2011 and 2013 in the lower part of the River Umeälven, Sweden. For individual fish, there was no effect of body size but the energetic state of the fish had a negative effect on sea entry. The most important factor affecting sea entry rate was the water discharge in the old river bed that differed among years. Smolts were more likely to enter the sea in years when the discharge was high or when the discharge increased substantially shortly after release. Hatchery‐reared fish had higher migration speed at a slower flowing section compared with a faster flowing section, which was likely a result of large hesitation to enter the rapid section. The increase in water discharge led to an increase in fish migration speed disproportional to the increase in water velocity. Our results highlight the importance of water discharge for the smolts during smolt migration, and we argue that concern should be given to migrating fish when managing regulated rivers. |
author2 |
Svenska Forskningsrådet Formas Vattenfall Havs- och Vattenmyndigheten |
format |
Article in Journal/Newspaper |
author |
Persson, Lo Kagervall, Anders Leonardsson, Kjell Royan, Mansour Alanärä, Anders |
spellingShingle |
Persson, Lo Kagervall, Anders Leonardsson, Kjell Royan, Mansour Alanärä, Anders The effect of physiological and environmental conditions on smolt migration in Atlantic salmon Salmo salar |
author_facet |
Persson, Lo Kagervall, Anders Leonardsson, Kjell Royan, Mansour Alanärä, Anders |
author_sort |
Persson, Lo |
title |
The effect of physiological and environmental conditions on smolt migration in Atlantic salmon Salmo salar |
title_short |
The effect of physiological and environmental conditions on smolt migration in Atlantic salmon Salmo salar |
title_full |
The effect of physiological and environmental conditions on smolt migration in Atlantic salmon Salmo salar |
title_fullStr |
The effect of physiological and environmental conditions on smolt migration in Atlantic salmon Salmo salar |
title_full_unstemmed |
The effect of physiological and environmental conditions on smolt migration in Atlantic salmon Salmo salar |
title_sort |
effect of physiological and environmental conditions on smolt migration in atlantic salmon salmo salar |
publisher |
Wiley |
publishDate |
2018 |
url |
http://dx.doi.org/10.1111/eff.12442 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Feff.12442 https://onlinelibrary.wiley.com/doi/pdf/10.1111/eff.12442 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/eff.12442 |
long_lat |
ENVELOPE(15.133,15.133,65.767,65.767) |
geographic |
Umeälven |
geographic_facet |
Umeälven |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Ecology of Freshwater Fish volume 28, issue 2, page 190-199 ISSN 0906-6691 1600-0633 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/eff.12442 |
container_title |
Ecology of Freshwater Fish |
container_volume |
28 |
container_issue |
2 |
container_start_page |
190 |
op_container_end_page |
199 |
_version_ |
1800748157496197120 |