Survival and migration patterns of naturally and hatchery‐reared Atlantic salmon ( Salmo salar) smolts in a Lake Ontario tributary using acoustic telemetry
Abstract Atlantic salmon ( Salmo salar ) smolts are often stocked into rivers to supplement natural reproduction, yet hatchery‐reared fish have lower survival compared to wild conspecifics. However, few studies have assessed riverine migratory performance and survival differences in hatchery and wil...
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Online Access: | http://dx.doi.org/10.1111/fwb.13467 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Ffwb.13467 https://onlinelibrary.wiley.com/doi/pdf/10.1111/fwb.13467 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/fwb.13467 |
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crwiley:10.1111/fwb.13467 2024-06-02T08:03:28+00:00 Survival and migration patterns of naturally and hatchery‐reared Atlantic salmon ( Salmo salar) smolts in a Lake Ontario tributary using acoustic telemetry Larocque, Sarah M. Johnson, Timothy B. Fisk, Aaron T. Natural Sciences and Engineering Research Council of Canada 2020 http://dx.doi.org/10.1111/fwb.13467 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Ffwb.13467 https://onlinelibrary.wiley.com/doi/pdf/10.1111/fwb.13467 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/fwb.13467 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Freshwater Biology volume 65, issue 5, page 835-848 ISSN 0046-5070 1365-2427 journal-article 2020 crwiley https://doi.org/10.1111/fwb.13467 2024-05-03T10:46:44Z Abstract Atlantic salmon ( Salmo salar ) smolts are often stocked into rivers to supplement natural reproduction, yet hatchery‐reared fish have lower survival compared to wild conspecifics. However, few studies have assessed riverine migratory performance and survival differences in hatchery and wild smolts, or more specifically naturally reared smolts (hatchery fish released earlier as parr), particularly in rivers with weirs which may further reduce survival. Using acoustic telemetry, including a subset of fish with novel transmitters that identify predation events, we assessed survival and migration patterns of hatchery‐ (2017: n = 32; 2018: n = 30) and naturally reared Atlantic salmon smolts (2017: n = 8; 2018: n = 30) in a Lake Ontario tributary with two weirs to better understand their ecology and assess the influence of environmental parameters on migration. Naturally reared smolts were 13.9 times more likely to survive than hatchery‐reared smolts and mark–recapture models indicated that weirs did not reduce survival for either group. Survival per km was lowest at the release site, indicating pre‐migration mortality, and specifically high stocking‐related mortality of hatchery‐reared smolts. Speed and times of day fish migrated (i.e. migratory performance) did not vary by rearing group, suggesting that the high mortality of hatchery‐reared smolts may be due to other factors related to hatchery and stocking operations. Overall mean (± SD ) migration speed for smolts was 0.70 ± 0.39 km/hr and movements occurred significantly more frequently at night (18:00–06:00). Smolts were detected in Lake Ontario after they left the river; however, the array in Lake Ontario was not conducive to providing much detail regarding movement patterns. There was no predation of the two predation tags detected in Lake Ontario, indicating that movements were made by smolts and not predators. With ongoing restoration efforts of Atlantic salmon in Lake Ontario, it was important to understand the smolt migration patterns and success ... Article in Journal/Newspaper Atlantic salmon Salmo salar Wiley Online Library Freshwater Biology 65 5 835 848 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Atlantic salmon ( Salmo salar ) smolts are often stocked into rivers to supplement natural reproduction, yet hatchery‐reared fish have lower survival compared to wild conspecifics. However, few studies have assessed riverine migratory performance and survival differences in hatchery and wild smolts, or more specifically naturally reared smolts (hatchery fish released earlier as parr), particularly in rivers with weirs which may further reduce survival. Using acoustic telemetry, including a subset of fish with novel transmitters that identify predation events, we assessed survival and migration patterns of hatchery‐ (2017: n = 32; 2018: n = 30) and naturally reared Atlantic salmon smolts (2017: n = 8; 2018: n = 30) in a Lake Ontario tributary with two weirs to better understand their ecology and assess the influence of environmental parameters on migration. Naturally reared smolts were 13.9 times more likely to survive than hatchery‐reared smolts and mark–recapture models indicated that weirs did not reduce survival for either group. Survival per km was lowest at the release site, indicating pre‐migration mortality, and specifically high stocking‐related mortality of hatchery‐reared smolts. Speed and times of day fish migrated (i.e. migratory performance) did not vary by rearing group, suggesting that the high mortality of hatchery‐reared smolts may be due to other factors related to hatchery and stocking operations. Overall mean (± SD ) migration speed for smolts was 0.70 ± 0.39 km/hr and movements occurred significantly more frequently at night (18:00–06:00). Smolts were detected in Lake Ontario after they left the river; however, the array in Lake Ontario was not conducive to providing much detail regarding movement patterns. There was no predation of the two predation tags detected in Lake Ontario, indicating that movements were made by smolts and not predators. With ongoing restoration efforts of Atlantic salmon in Lake Ontario, it was important to understand the smolt migration patterns and success ... |
author2 |
Natural Sciences and Engineering Research Council of Canada |
format |
Article in Journal/Newspaper |
author |
Larocque, Sarah M. Johnson, Timothy B. Fisk, Aaron T. |
spellingShingle |
Larocque, Sarah M. Johnson, Timothy B. Fisk, Aaron T. Survival and migration patterns of naturally and hatchery‐reared Atlantic salmon ( Salmo salar) smolts in a Lake Ontario tributary using acoustic telemetry |
author_facet |
Larocque, Sarah M. Johnson, Timothy B. Fisk, Aaron T. |
author_sort |
Larocque, Sarah M. |
title |
Survival and migration patterns of naturally and hatchery‐reared Atlantic salmon ( Salmo salar) smolts in a Lake Ontario tributary using acoustic telemetry |
title_short |
Survival and migration patterns of naturally and hatchery‐reared Atlantic salmon ( Salmo salar) smolts in a Lake Ontario tributary using acoustic telemetry |
title_full |
Survival and migration patterns of naturally and hatchery‐reared Atlantic salmon ( Salmo salar) smolts in a Lake Ontario tributary using acoustic telemetry |
title_fullStr |
Survival and migration patterns of naturally and hatchery‐reared Atlantic salmon ( Salmo salar) smolts in a Lake Ontario tributary using acoustic telemetry |
title_full_unstemmed |
Survival and migration patterns of naturally and hatchery‐reared Atlantic salmon ( Salmo salar) smolts in a Lake Ontario tributary using acoustic telemetry |
title_sort |
survival and migration patterns of naturally and hatchery‐reared atlantic salmon ( salmo salar) smolts in a lake ontario tributary using acoustic telemetry |
publisher |
Wiley |
publishDate |
2020 |
url |
http://dx.doi.org/10.1111/fwb.13467 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Ffwb.13467 https://onlinelibrary.wiley.com/doi/pdf/10.1111/fwb.13467 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/fwb.13467 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Freshwater Biology volume 65, issue 5, page 835-848 ISSN 0046-5070 1365-2427 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/fwb.13467 |
container_title |
Freshwater Biology |
container_volume |
65 |
container_issue |
5 |
container_start_page |
835 |
op_container_end_page |
848 |
_version_ |
1800747989108523008 |