Behaviour and mortality of downstream migrating Atlantic salmon smolts at a small power station with multiple migration routes
Abstract Salmon smolts were released upstream of a run‐of‐river hydropower site and recaptured downstream for inspection. Descending fish behaviour through three possible migration routes (turbines, fishway, spillway) was analysed using telemetry, fyke nets and diving. Tagged smolts did not follow t...
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crwiley:10.1111/fme.12382 2024-06-02T08:03:39+00:00 Behaviour and mortality of downstream migrating Atlantic salmon smolts at a small power station with multiple migration routes Kärgenberg, Einar Thorstad, Eva B. Järvekülg, Rein Sandlund, Odd Terje Saadre, Ene Økland, Finn Thalfeldt, Mart Tambets, Meelis 2019 http://dx.doi.org/10.1111/fme.12382 https://onlinelibrary.wiley.com/doi/pdf/10.1111/fme.12382 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/fme.12382 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Fisheries Management and Ecology volume 27, issue 1, page 32-40 ISSN 0969-997X 1365-2400 journal-article 2019 crwiley https://doi.org/10.1111/fme.12382 2024-05-03T11:44:26Z Abstract Salmon smolts were released upstream of a run‐of‐river hydropower site and recaptured downstream for inspection. Descending fish behaviour through three possible migration routes (turbines, fishway, spillway) was analysed using telemetry, fyke nets and diving. Tagged smolts did not follow the main water flow; over 70% used the fishway, which received only about 10% of the flow. The turbines received about 80% of the water, but <25% of the smolts. Smolts were not fully stopped from entering the turbines by the 25‐mm bar racks. Mortality of smolts passing through the Kaplan turbines was at minimum 36%. No mortality was found in fish moving through the fishway or spillway. This shows that small and fast‐rotating Kaplan turbines can cause relatively high mortality. No mortality in alternative migration routes resulted in a total mortality for descending smolts at the hydropower station of 8.5%, emphasising the importance of providing functional alternative migration routes. Article in Journal/Newspaper Atlantic salmon Wiley Online Library Fisheries Management and Ecology 27 1 32 40 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Salmon smolts were released upstream of a run‐of‐river hydropower site and recaptured downstream for inspection. Descending fish behaviour through three possible migration routes (turbines, fishway, spillway) was analysed using telemetry, fyke nets and diving. Tagged smolts did not follow the main water flow; over 70% used the fishway, which received only about 10% of the flow. The turbines received about 80% of the water, but <25% of the smolts. Smolts were not fully stopped from entering the turbines by the 25‐mm bar racks. Mortality of smolts passing through the Kaplan turbines was at minimum 36%. No mortality was found in fish moving through the fishway or spillway. This shows that small and fast‐rotating Kaplan turbines can cause relatively high mortality. No mortality in alternative migration routes resulted in a total mortality for descending smolts at the hydropower station of 8.5%, emphasising the importance of providing functional alternative migration routes. |
format |
Article in Journal/Newspaper |
author |
Kärgenberg, Einar Thorstad, Eva B. Järvekülg, Rein Sandlund, Odd Terje Saadre, Ene Økland, Finn Thalfeldt, Mart Tambets, Meelis |
spellingShingle |
Kärgenberg, Einar Thorstad, Eva B. Järvekülg, Rein Sandlund, Odd Terje Saadre, Ene Økland, Finn Thalfeldt, Mart Tambets, Meelis Behaviour and mortality of downstream migrating Atlantic salmon smolts at a small power station with multiple migration routes |
author_facet |
Kärgenberg, Einar Thorstad, Eva B. Järvekülg, Rein Sandlund, Odd Terje Saadre, Ene Økland, Finn Thalfeldt, Mart Tambets, Meelis |
author_sort |
Kärgenberg, Einar |
title |
Behaviour and mortality of downstream migrating Atlantic salmon smolts at a small power station with multiple migration routes |
title_short |
Behaviour and mortality of downstream migrating Atlantic salmon smolts at a small power station with multiple migration routes |
title_full |
Behaviour and mortality of downstream migrating Atlantic salmon smolts at a small power station with multiple migration routes |
title_fullStr |
Behaviour and mortality of downstream migrating Atlantic salmon smolts at a small power station with multiple migration routes |
title_full_unstemmed |
Behaviour and mortality of downstream migrating Atlantic salmon smolts at a small power station with multiple migration routes |
title_sort |
behaviour and mortality of downstream migrating atlantic salmon smolts at a small power station with multiple migration routes |
publisher |
Wiley |
publishDate |
2019 |
url |
http://dx.doi.org/10.1111/fme.12382 https://onlinelibrary.wiley.com/doi/pdf/10.1111/fme.12382 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/fme.12382 |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_source |
Fisheries Management and Ecology volume 27, issue 1, page 32-40 ISSN 0969-997X 1365-2400 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/fme.12382 |
container_title |
Fisheries Management and Ecology |
container_volume |
27 |
container_issue |
1 |
container_start_page |
32 |
op_container_end_page |
40 |
_version_ |
1800748241318313984 |