Spawning season movements of transported landlocked Atlantic salmon in a newly restored river habitat
Certain spawning areas of the critically endangered Lake Saimaa landlocked Atlantic salmon (Salmo salar m. sebago) have been recently restored by excavator- and helicopter-scattered gravel, but the success of applied methodologies has remained open. Here, we monitored the spawning-related movements...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Language: | English |
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2021
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Online Access: | http://dx.doi.org/10.1139/cjfas-2019-0334 https://cdnsciencepub.com/doi/full-xml/10.1139/cjfas-2019-0334 https://cdnsciencepub.com/doi/pdf/10.1139/cjfas-2019-0334 |
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crcansciencepubl:10.1139/cjfas-2019-0334 2024-05-19T07:37:36+00:00 Spawning season movements of transported landlocked Atlantic salmon in a newly restored river habitat Hatanpää, Aurora Huuskonen, Hannu Janhunen, Matti Kortet, Raine Piironen, Jorma 2021 http://dx.doi.org/10.1139/cjfas-2019-0334 https://cdnsciencepub.com/doi/full-xml/10.1139/cjfas-2019-0334 https://cdnsciencepub.com/doi/pdf/10.1139/cjfas-2019-0334 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 78, issue 2, page 184-192 ISSN 0706-652X 1205-7533 journal-article 2021 crcansciencepubl https://doi.org/10.1139/cjfas-2019-0334 2024-05-02T06:51:25Z Certain spawning areas of the critically endangered Lake Saimaa landlocked Atlantic salmon (Salmo salar m. sebago) have been recently restored by excavator- and helicopter-scattered gravel, but the success of applied methodologies has remained open. Here, we monitored the spawning-related movements and redds occurrence of transported semi-wild and hatchery-reared salmon in the restored River Ala-Koitajoki, eastern Finland, using radiotelemetry and snorkeling. Nearly all fish accepted the newly restored spawning habitats in the river that maintains a low flow rate (only 4 m 3 ·s −1 ). The movements of females released up to 2 weeks before spawning time were restricted mainly to the closest rapids from the release site, and most of the movements were directed downstream. Semi-wild and hatchery background fish exhibited similar mobility, which was more variable among males. A majority of redds were found in restored areas, and both helicopter- and excavator-scattered gravels were accepted as spawning substrates. Our results indicate that natural reproduction of the studied landlocked salmon population can be successfully returned to its original spawning river by restoration of habitats and transfer of spawners. Article in Journal/Newspaper Atlantic salmon Salmo salar Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 78 2 184 192 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
Certain spawning areas of the critically endangered Lake Saimaa landlocked Atlantic salmon (Salmo salar m. sebago) have been recently restored by excavator- and helicopter-scattered gravel, but the success of applied methodologies has remained open. Here, we monitored the spawning-related movements and redds occurrence of transported semi-wild and hatchery-reared salmon in the restored River Ala-Koitajoki, eastern Finland, using radiotelemetry and snorkeling. Nearly all fish accepted the newly restored spawning habitats in the river that maintains a low flow rate (only 4 m 3 ·s −1 ). The movements of females released up to 2 weeks before spawning time were restricted mainly to the closest rapids from the release site, and most of the movements were directed downstream. Semi-wild and hatchery background fish exhibited similar mobility, which was more variable among males. A majority of redds were found in restored areas, and both helicopter- and excavator-scattered gravels were accepted as spawning substrates. Our results indicate that natural reproduction of the studied landlocked salmon population can be successfully returned to its original spawning river by restoration of habitats and transfer of spawners. |
format |
Article in Journal/Newspaper |
author |
Hatanpää, Aurora Huuskonen, Hannu Janhunen, Matti Kortet, Raine Piironen, Jorma |
spellingShingle |
Hatanpää, Aurora Huuskonen, Hannu Janhunen, Matti Kortet, Raine Piironen, Jorma Spawning season movements of transported landlocked Atlantic salmon in a newly restored river habitat |
author_facet |
Hatanpää, Aurora Huuskonen, Hannu Janhunen, Matti Kortet, Raine Piironen, Jorma |
author_sort |
Hatanpää, Aurora |
title |
Spawning season movements of transported landlocked Atlantic salmon in a newly restored river habitat |
title_short |
Spawning season movements of transported landlocked Atlantic salmon in a newly restored river habitat |
title_full |
Spawning season movements of transported landlocked Atlantic salmon in a newly restored river habitat |
title_fullStr |
Spawning season movements of transported landlocked Atlantic salmon in a newly restored river habitat |
title_full_unstemmed |
Spawning season movements of transported landlocked Atlantic salmon in a newly restored river habitat |
title_sort |
spawning season movements of transported landlocked atlantic salmon in a newly restored river habitat |
publisher |
Canadian Science Publishing |
publishDate |
2021 |
url |
http://dx.doi.org/10.1139/cjfas-2019-0334 https://cdnsciencepub.com/doi/full-xml/10.1139/cjfas-2019-0334 https://cdnsciencepub.com/doi/pdf/10.1139/cjfas-2019-0334 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 78, issue 2, page 184-192 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cjfas-2019-0334 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
78 |
container_issue |
2 |
container_start_page |
184 |
op_container_end_page |
192 |
_version_ |
1799476928324829184 |