Comparing the migration behavior and survival of Atlantic salmon ( Salmo salar) and brown trout ( Salmo trutta) smolts
Abstract Many organisms rely on migrations between habitats to maximize lifetime fitness, but these migrations can be risky due to a suite of factors. In anadromous salmonids, the smolt migration from fresh water to sea is a critical life stage, during which smolts can experience high mortality from...
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Online Access: | http://dx.doi.org/10.1111/jfb.15749 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jfb.15749 |
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crwiley:10.1111/jfb.15749 2024-05-19T07:37:44+00:00 Comparing the migration behavior and survival of Atlantic salmon ( Salmo salar) and brown trout ( Salmo trutta) smolts Sortland, Lene Klubben Aarestrup, Kim Birnie‐Gauvin, Kim European Regional Development Fund 2024 http://dx.doi.org/10.1111/jfb.15749 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jfb.15749 en eng Wiley http://creativecommons.org/licenses/by-nc/4.0/ Journal of Fish Biology ISSN 0022-1112 1095-8649 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 2024 crwiley https://doi.org/10.1111/jfb.15749 2024-04-22T07:30:11Z Abstract Many organisms rely on migrations between habitats to maximize lifetime fitness, but these migrations can be risky due to a suite of factors. In anadromous salmonids, the smolt migration from fresh water to sea is a critical life stage, during which smolts can experience high mortality from multiple sources. This study investigated the migratory behavior and survival of Atlantic salmon ( Salmo salar ) and anadromous brown trout ( Salmo trutta ) smolts during their seaward migration using acoustic telemetry between March and May 2021. Due to the extinction of wild salmon in the River Gudenaa after the construction of the Tange hydropower plant, this study used hatchery‐reared salmon originating from a nearby Danish river. A total of 75 hatchery‐reared salmon smolts, 75 hatchery‐reared trout smolts, and 75 wild trout smolts were tagged with acoustic transmitters and released into River Gudenaa, Denmark. The downstream movements of tagged fish were monitored using acoustic receivers deployed in the river and fjord. Hatchery‐reared trout initiated migration first, followed by hatchery‐reared salmon, with wild trout being the last to migrate. There was no difference in riverine progression rates among the three smolt groups, but noticeable differences emerged once in the fjord: trout (wild and hatchery) slowed down, whereas hatchery‐reared salmon maintained their speed. Riverine migration was predominantly nocturnal for all smolts; however, daytime migration increased at the fjord arrays. Day‐of‐year significantly influenced diurnal patterns in the river and fjord, where daytime migration increased later in the year. Hatchery‐reared salmon and wild trout had reasonably good overall survival from river to sea entry (≥66%), whereas hatchery‐reared trout had poor survival (c.26%). The fjord was the major bottleneck for survival of hatchery‐reared trout. We found no strong evidence for differences in progression rate or diurnal patterns between wild and hatchery‐reared trout to explain the lower survival. This ... Article in Journal/Newspaper Atlantic salmon Salmo salar Wiley Online Library Journal of Fish Biology |
institution |
Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Sortland, Lene Klubben Aarestrup, Kim Birnie‐Gauvin, Kim Comparing the migration behavior and survival of Atlantic salmon ( Salmo salar) and brown trout ( Salmo trutta) smolts |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Abstract Many organisms rely on migrations between habitats to maximize lifetime fitness, but these migrations can be risky due to a suite of factors. In anadromous salmonids, the smolt migration from fresh water to sea is a critical life stage, during which smolts can experience high mortality from multiple sources. This study investigated the migratory behavior and survival of Atlantic salmon ( Salmo salar ) and anadromous brown trout ( Salmo trutta ) smolts during their seaward migration using acoustic telemetry between March and May 2021. Due to the extinction of wild salmon in the River Gudenaa after the construction of the Tange hydropower plant, this study used hatchery‐reared salmon originating from a nearby Danish river. A total of 75 hatchery‐reared salmon smolts, 75 hatchery‐reared trout smolts, and 75 wild trout smolts were tagged with acoustic transmitters and released into River Gudenaa, Denmark. The downstream movements of tagged fish were monitored using acoustic receivers deployed in the river and fjord. Hatchery‐reared trout initiated migration first, followed by hatchery‐reared salmon, with wild trout being the last to migrate. There was no difference in riverine progression rates among the three smolt groups, but noticeable differences emerged once in the fjord: trout (wild and hatchery) slowed down, whereas hatchery‐reared salmon maintained their speed. Riverine migration was predominantly nocturnal for all smolts; however, daytime migration increased at the fjord arrays. Day‐of‐year significantly influenced diurnal patterns in the river and fjord, where daytime migration increased later in the year. Hatchery‐reared salmon and wild trout had reasonably good overall survival from river to sea entry (≥66%), whereas hatchery‐reared trout had poor survival (c.26%). The fjord was the major bottleneck for survival of hatchery‐reared trout. We found no strong evidence for differences in progression rate or diurnal patterns between wild and hatchery‐reared trout to explain the lower survival. This ... |
author2 |
European Regional Development Fund |
format |
Article in Journal/Newspaper |
author |
Sortland, Lene Klubben Aarestrup, Kim Birnie‐Gauvin, Kim |
author_facet |
Sortland, Lene Klubben Aarestrup, Kim Birnie‐Gauvin, Kim |
author_sort |
Sortland, Lene Klubben |
title |
Comparing the migration behavior and survival of Atlantic salmon ( Salmo salar) and brown trout ( Salmo trutta) smolts |
title_short |
Comparing the migration behavior and survival of Atlantic salmon ( Salmo salar) and brown trout ( Salmo trutta) smolts |
title_full |
Comparing the migration behavior and survival of Atlantic salmon ( Salmo salar) and brown trout ( Salmo trutta) smolts |
title_fullStr |
Comparing the migration behavior and survival of Atlantic salmon ( Salmo salar) and brown trout ( Salmo trutta) smolts |
title_full_unstemmed |
Comparing the migration behavior and survival of Atlantic salmon ( Salmo salar) and brown trout ( Salmo trutta) smolts |
title_sort |
comparing the migration behavior and survival of atlantic salmon ( salmo salar) and brown trout ( salmo trutta) smolts |
publisher |
Wiley |
publishDate |
2024 |
url |
http://dx.doi.org/10.1111/jfb.15749 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jfb.15749 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Journal of Fish Biology ISSN 0022-1112 1095-8649 |
op_rights |
http://creativecommons.org/licenses/by-nc/4.0/ |
op_doi |
https://doi.org/10.1111/jfb.15749 |
container_title |
Journal of Fish Biology |
_version_ |
1799477085074358272 |