Atlantic Salmon Upstream Migration Delay in a Large Hydropower Reservoir
Abstract Spawning success of Atlantic Salmon Salmo salar is challenged when migratory routes to natal streams are obstructed by hydropower generation stations and reservoirs that lack directional cues, potentially causing migratory delay. This study used 74 acoustic‐tagged adult Atlantic Salmon duri...
Published in: | North American Journal of Fisheries Management |
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crwiley:10.1002/nafm.10544 2024-09-30T14:32:19+00:00 Atlantic Salmon Upstream Migration Delay in a Large Hydropower Reservoir Babin, Amanda B. Peake, Stephan Linnansaari, Tommi Curry, R. Allen Ndong, Mouhamed Haralampides, Katy Jones, Ross Natural Sciences and Engineering Research Council of Canada 2021 http://dx.doi.org/10.1002/nafm.10544 https://onlinelibrary.wiley.com/doi/pdf/10.1002/nafm.10544 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/nafm.10544 https://afspubs.onlinelibrary.wiley.com/doi/pdf/10.1002/nafm.10544 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor North American Journal of Fisheries Management volume 41, issue 1, page 158-175 ISSN 0275-5947 1548-8675 journal-article 2021 crwiley https://doi.org/10.1002/nafm.10544 2024-09-03T04:23:49Z Abstract Spawning success of Atlantic Salmon Salmo salar is challenged when migratory routes to natal streams are obstructed by hydropower generation stations and reservoirs that lack directional cues, potentially causing migratory delay. This study used 74 acoustic‐tagged adult Atlantic Salmon during their spawning migrations to quantify migratory success, rates, and delay through the Mactaquac Reservoir in the Saint John River, New Brunswick, during three migration seasons in 2014–2016. Tag loss or mortality was considerable, reducing the effective sample size to 34 successfully tracked adults. Of these, 41% experienced fallback over the dam, 12% were unsuccessful in exiting the reservoir, and 47% were successful in exiting the reservoir on the way to the spawning grounds. Migration rates were significantly slower in the reservoir (median ± SE = 9.3 ± 1.9 km/d) than upriver (39.0 ± 4.1 km/d), and the tagged Atlantic Salmon spent 31–53% of their time reversing direction and thus travelled longer distances (73 ± 58 km) than the minimum 37‐km midline route through the reservoir. Traveling the distance of the reservoir at the upriver migration rate could have shortened their journey by a median of 3.8 d. Sensor tags indicated that individual Atlantic Salmon experienced temperatures of 10–20°C (median ± SE = 16.0 ± 0.03°C) and migrated at depths of 5–35 m (23.4 ± 0.1 m) within the reservoir. Given that some of the energy needed for reproductive development and activities was likely appropriated by migratory delay and that a moderate proportion (47%) of adults emigrated from the reservoir, volitional passage may not be a successful management strategy in the studied reservoir. However, a substantially reduced sample size negates conclusive remarks about which management strategy would maximize survival and spawning success, and further study is needed. Article in Journal/Newspaper Atlantic salmon Salmo salar Wiley Online Library North American Journal of Fisheries Management 41 1 158 175 |
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Wiley Online Library |
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English |
description |
Abstract Spawning success of Atlantic Salmon Salmo salar is challenged when migratory routes to natal streams are obstructed by hydropower generation stations and reservoirs that lack directional cues, potentially causing migratory delay. This study used 74 acoustic‐tagged adult Atlantic Salmon during their spawning migrations to quantify migratory success, rates, and delay through the Mactaquac Reservoir in the Saint John River, New Brunswick, during three migration seasons in 2014–2016. Tag loss or mortality was considerable, reducing the effective sample size to 34 successfully tracked adults. Of these, 41% experienced fallback over the dam, 12% were unsuccessful in exiting the reservoir, and 47% were successful in exiting the reservoir on the way to the spawning grounds. Migration rates were significantly slower in the reservoir (median ± SE = 9.3 ± 1.9 km/d) than upriver (39.0 ± 4.1 km/d), and the tagged Atlantic Salmon spent 31–53% of their time reversing direction and thus travelled longer distances (73 ± 58 km) than the minimum 37‐km midline route through the reservoir. Traveling the distance of the reservoir at the upriver migration rate could have shortened their journey by a median of 3.8 d. Sensor tags indicated that individual Atlantic Salmon experienced temperatures of 10–20°C (median ± SE = 16.0 ± 0.03°C) and migrated at depths of 5–35 m (23.4 ± 0.1 m) within the reservoir. Given that some of the energy needed for reproductive development and activities was likely appropriated by migratory delay and that a moderate proportion (47%) of adults emigrated from the reservoir, volitional passage may not be a successful management strategy in the studied reservoir. However, a substantially reduced sample size negates conclusive remarks about which management strategy would maximize survival and spawning success, and further study is needed. |
author2 |
Natural Sciences and Engineering Research Council of Canada |
format |
Article in Journal/Newspaper |
author |
Babin, Amanda B. Peake, Stephan Linnansaari, Tommi Curry, R. Allen Ndong, Mouhamed Haralampides, Katy Jones, Ross |
spellingShingle |
Babin, Amanda B. Peake, Stephan Linnansaari, Tommi Curry, R. Allen Ndong, Mouhamed Haralampides, Katy Jones, Ross Atlantic Salmon Upstream Migration Delay in a Large Hydropower Reservoir |
author_facet |
Babin, Amanda B. Peake, Stephan Linnansaari, Tommi Curry, R. Allen Ndong, Mouhamed Haralampides, Katy Jones, Ross |
author_sort |
Babin, Amanda B. |
title |
Atlantic Salmon Upstream Migration Delay in a Large Hydropower Reservoir |
title_short |
Atlantic Salmon Upstream Migration Delay in a Large Hydropower Reservoir |
title_full |
Atlantic Salmon Upstream Migration Delay in a Large Hydropower Reservoir |
title_fullStr |
Atlantic Salmon Upstream Migration Delay in a Large Hydropower Reservoir |
title_full_unstemmed |
Atlantic Salmon Upstream Migration Delay in a Large Hydropower Reservoir |
title_sort |
atlantic salmon upstream migration delay in a large hydropower reservoir |
publisher |
Wiley |
publishDate |
2021 |
url |
http://dx.doi.org/10.1002/nafm.10544 https://onlinelibrary.wiley.com/doi/pdf/10.1002/nafm.10544 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/nafm.10544 https://afspubs.onlinelibrary.wiley.com/doi/pdf/10.1002/nafm.10544 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
North American Journal of Fisheries Management volume 41, issue 1, page 158-175 ISSN 0275-5947 1548-8675 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/nafm.10544 |
container_title |
North American Journal of Fisheries Management |
container_volume |
41 |
container_issue |
1 |
container_start_page |
158 |
op_container_end_page |
175 |
_version_ |
1811636505973620736 |