Influence of hydraulics on the dowsntream migratory route of Atlantic salmon (Salmo salar)
The interaction between hydrodynamics and the upstream migration of fish has been investigated in several studies over the past few years, but there has been a relative lack of investigation into the effects of hydraulics on the downstream migration of fish. In Norway, mortality associated with down...
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ftunivmassamh:oai:scholarworks.umass.edu:fishpassage_conference-2291 2023-05-15T15:31:33+02:00 Influence of hydraulics on the dowsntream migratory route of Atlantic salmon (Salmo salar) Silva, Ana T. Hedger, Richard D. Øystein, Karl Økland, Finn Bærum, Kim M. Baktoft, Henrik Fjeldstad, Hans-Petter Forseth, Torbjørn 2018-12-11T19:40:00Z application/pdf https://scholarworks.umass.edu/fishpassage_conference/2018/December11/2 https://scholarworks.umass.edu/cgi/viewcontent.cgi?article=2291&context=fishpassage_conference unknown ScholarWorks@UMass Amherst https://scholarworks.umass.edu/fishpassage_conference/2018/December11/2 https://scholarworks.umass.edu/cgi/viewcontent.cgi?article=2291&context=fishpassage_conference International Conference on Engineering and Ecohydrology for Fish Passage text 2018 ftunivmassamh 2022-01-10T06:53:55Z The interaction between hydrodynamics and the upstream migration of fish has been investigated in several studies over the past few years, but there has been a relative lack of investigation into the effects of hydraulics on the downstream migration of fish. In Norway, mortality associated with downstream migration is strongly related to hydropower production. However, there is a poor understanding of how fish choose their migratory routes, which limits the development of measures to mitigate the impact of anthropogenic structures on fish migration. The current study aimed to analyze the effect of hydraulics on the choice of downstream migration route of Atlantic salmon smolts (Salmo salar) in the proximity of an intake to a hydropower plant in Norway. We combined computational fluid dynamic modeling with 3-Dimensional acoustic telemetry positioning of a group of tagged smolts to investigate the interaction between fish and the flow dynamics, and to determine the influence of this interaction on fish migratory routes. A Hidden Markov Model was used to predict migratory routes based on the relations found between the hydraulic variables and fish behaviour. Results showed relationships between fish migratory routes and the different components of flow velocity. The knowledge acquired in this study is expected to inform opportunities and decision making in aquatic resources management and engineering design to increase fish survival past hydropower intakes and other anthropogenic structures. Text Atlantic salmon Salmo salar University of Massachusetts: ScholarWorks@UMass Amherst Norway |
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University of Massachusetts: ScholarWorks@UMass Amherst |
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The interaction between hydrodynamics and the upstream migration of fish has been investigated in several studies over the past few years, but there has been a relative lack of investigation into the effects of hydraulics on the downstream migration of fish. In Norway, mortality associated with downstream migration is strongly related to hydropower production. However, there is a poor understanding of how fish choose their migratory routes, which limits the development of measures to mitigate the impact of anthropogenic structures on fish migration. The current study aimed to analyze the effect of hydraulics on the choice of downstream migration route of Atlantic salmon smolts (Salmo salar) in the proximity of an intake to a hydropower plant in Norway. We combined computational fluid dynamic modeling with 3-Dimensional acoustic telemetry positioning of a group of tagged smolts to investigate the interaction between fish and the flow dynamics, and to determine the influence of this interaction on fish migratory routes. A Hidden Markov Model was used to predict migratory routes based on the relations found between the hydraulic variables and fish behaviour. Results showed relationships between fish migratory routes and the different components of flow velocity. The knowledge acquired in this study is expected to inform opportunities and decision making in aquatic resources management and engineering design to increase fish survival past hydropower intakes and other anthropogenic structures. |
format |
Text |
author |
Silva, Ana T. Hedger, Richard D. Øystein, Karl Økland, Finn Bærum, Kim M. Baktoft, Henrik Fjeldstad, Hans-Petter Forseth, Torbjørn |
spellingShingle |
Silva, Ana T. Hedger, Richard D. Øystein, Karl Økland, Finn Bærum, Kim M. Baktoft, Henrik Fjeldstad, Hans-Petter Forseth, Torbjørn Influence of hydraulics on the dowsntream migratory route of Atlantic salmon (Salmo salar) |
author_facet |
Silva, Ana T. Hedger, Richard D. Øystein, Karl Økland, Finn Bærum, Kim M. Baktoft, Henrik Fjeldstad, Hans-Petter Forseth, Torbjørn |
author_sort |
Silva, Ana T. |
title |
Influence of hydraulics on the dowsntream migratory route of Atlantic salmon (Salmo salar) |
title_short |
Influence of hydraulics on the dowsntream migratory route of Atlantic salmon (Salmo salar) |
title_full |
Influence of hydraulics on the dowsntream migratory route of Atlantic salmon (Salmo salar) |
title_fullStr |
Influence of hydraulics on the dowsntream migratory route of Atlantic salmon (Salmo salar) |
title_full_unstemmed |
Influence of hydraulics on the dowsntream migratory route of Atlantic salmon (Salmo salar) |
title_sort |
influence of hydraulics on the dowsntream migratory route of atlantic salmon (salmo salar) |
publisher |
ScholarWorks@UMass Amherst |
publishDate |
2018 |
url |
https://scholarworks.umass.edu/fishpassage_conference/2018/December11/2 https://scholarworks.umass.edu/cgi/viewcontent.cgi?article=2291&context=fishpassage_conference |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
International Conference on Engineering and Ecohydrology for Fish Passage |
op_relation |
https://scholarworks.umass.edu/fishpassage_conference/2018/December11/2 https://scholarworks.umass.edu/cgi/viewcontent.cgi?article=2291&context=fishpassage_conference |
_version_ |
1766362069063434240 |