Migration problems of Atlantic salmon (Salmo salar L.) in flow regulated rivers
Migration patterns of adult Atlantic salmon (Salmo salar) and smolts of salmon and brown trout (Salmo trutta) were studied in the flow controlled areas of two northern Swedish rivers. Fish behaviour and migration success at passages of various hydropower facilities were evaluated in different flow r...
Main Author: | |
---|---|
Format: | Doctoral or Postdoctoral Thesis |
Language: | English |
Published: |
2005
|
Subjects: | |
Online Access: | https://pub.epsilon.slu.se/987/ https://pub.epsilon.slu.se/987/1/PAPER_0_FINAL_in_Thesis_e-version.pdf |
id |
ftslunivuppsala:oai:pub.epsilon.slu.se:987 |
---|---|
record_format |
openpolar |
spelling |
ftslunivuppsala:oai:pub.epsilon.slu.se:987 2024-06-09T07:44:47+00:00 Migration problems of Atlantic salmon (Salmo salar L.) in flow regulated rivers Rivinoja, Peter 2005-11 application/pdf https://pub.epsilon.slu.se/987/ https://pub.epsilon.slu.se/987/1/PAPER_0_FINAL_in_Thesis_e-version.pdf eng eng https://pub.epsilon.slu.se/987/1/PAPER_0_FINAL_in_Thesis_e-version.pdf Rivinoja, Peter (2005). Migration problems of Atlantic salmon (Salmo salar L.) in flow regulated rivers. Diss. (sammanfattning/summary) Umeå : Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae, 1652-6880 2005:114 ISBN 91-576-6913-9 [Doctoral thesis] Not in use please see Agris categories Doctoral thesis NonPeerReviewed info:eu-repo/semantics/doctoralThesis 2005 ftslunivuppsala 2024-05-16T04:04:25Z Migration patterns of adult Atlantic salmon (Salmo salar) and smolts of salmon and brown trout (Salmo trutta) were studied in the flow controlled areas of two northern Swedish rivers. Fish behaviour and migration success at passages of various hydropower facilities were evaluated in different flow regimes. In addition, the impacts of the power-stations on the salmon populations were modelled. On average, 30% (annual mean 0-47%) of the upstream migrating salmon that were captured at the mouth of Umeälven and marked with radio-, PIT- or Carlin-tags in 1995-2005 (n = 2651), reached the fish-ladder 32 km upstream. The migration took, on average, 44 days from the river mouth to the fish-ladder. Salmon were hindered or delayed at the power-station outlet, waterfalls and the fish-ladder area. At the turbine outlet area, salmon generally responded to increased bypass flows by upstream migration. In total, a 70 % average loss of potential spawners to the catchment area was estimated. Predictions based on population modelling showed that if 75 % of the females passed the regulated section successfully and reached spawning areas in the tributary Vindelälven, the population could increase by about 500 % over a ten-year period. Radio-tagged smolts (n = 206) of Atlantic salmon and brown trout released upstream of the power-stations at Umeälven and Piteälven in 2002-2004 migrated downstream in the main flows at a speed of about 2 body length s-1, eventually leading them to the turbine intakes. Migrating smolts were observed surface oriented at depths of 1-3 m. Flow modelling estimated relatively low fish guidance efficiencies for the spillways at natural flows. About 13 % of the smolts at Piteälven were hindered as they approached the power-station, and mortality of smolts at turbine passage was positively related to body size. By using the data for radio-tagged smolts and data from Carlin-tagged smolts (n = 7450) in 1998-1999, the overall average mortality for smolts at the power-station was estimated to 17%. Population ... Doctoral or Postdoctoral Thesis Atlantic salmon Salmo salar Swedish University of Agricultural Sciences (SLU): Epsilon Open Archive Umeälven ENVELOPE(15.133,15.133,65.767,65.767) Piteälven ENVELOPE(17.000,17.000,66.833,66.833) |
institution |
Open Polar |
collection |
Swedish University of Agricultural Sciences (SLU): Epsilon Open Archive |
op_collection_id |
ftslunivuppsala |
language |
English |
topic |
Not in use please see Agris categories |
spellingShingle |
Not in use please see Agris categories Rivinoja, Peter Migration problems of Atlantic salmon (Salmo salar L.) in flow regulated rivers |
topic_facet |
Not in use please see Agris categories |
description |
Migration patterns of adult Atlantic salmon (Salmo salar) and smolts of salmon and brown trout (Salmo trutta) were studied in the flow controlled areas of two northern Swedish rivers. Fish behaviour and migration success at passages of various hydropower facilities were evaluated in different flow regimes. In addition, the impacts of the power-stations on the salmon populations were modelled. On average, 30% (annual mean 0-47%) of the upstream migrating salmon that were captured at the mouth of Umeälven and marked with radio-, PIT- or Carlin-tags in 1995-2005 (n = 2651), reached the fish-ladder 32 km upstream. The migration took, on average, 44 days from the river mouth to the fish-ladder. Salmon were hindered or delayed at the power-station outlet, waterfalls and the fish-ladder area. At the turbine outlet area, salmon generally responded to increased bypass flows by upstream migration. In total, a 70 % average loss of potential spawners to the catchment area was estimated. Predictions based on population modelling showed that if 75 % of the females passed the regulated section successfully and reached spawning areas in the tributary Vindelälven, the population could increase by about 500 % over a ten-year period. Radio-tagged smolts (n = 206) of Atlantic salmon and brown trout released upstream of the power-stations at Umeälven and Piteälven in 2002-2004 migrated downstream in the main flows at a speed of about 2 body length s-1, eventually leading them to the turbine intakes. Migrating smolts were observed surface oriented at depths of 1-3 m. Flow modelling estimated relatively low fish guidance efficiencies for the spillways at natural flows. About 13 % of the smolts at Piteälven were hindered as they approached the power-station, and mortality of smolts at turbine passage was positively related to body size. By using the data for radio-tagged smolts and data from Carlin-tagged smolts (n = 7450) in 1998-1999, the overall average mortality for smolts at the power-station was estimated to 17%. Population ... |
format |
Doctoral or Postdoctoral Thesis |
author |
Rivinoja, Peter |
author_facet |
Rivinoja, Peter |
author_sort |
Rivinoja, Peter |
title |
Migration problems of Atlantic salmon (Salmo salar L.) in flow regulated rivers |
title_short |
Migration problems of Atlantic salmon (Salmo salar L.) in flow regulated rivers |
title_full |
Migration problems of Atlantic salmon (Salmo salar L.) in flow regulated rivers |
title_fullStr |
Migration problems of Atlantic salmon (Salmo salar L.) in flow regulated rivers |
title_full_unstemmed |
Migration problems of Atlantic salmon (Salmo salar L.) in flow regulated rivers |
title_sort |
migration problems of atlantic salmon (salmo salar l.) in flow regulated rivers |
publishDate |
2005 |
url |
https://pub.epsilon.slu.se/987/ https://pub.epsilon.slu.se/987/1/PAPER_0_FINAL_in_Thesis_e-version.pdf |
long_lat |
ENVELOPE(15.133,15.133,65.767,65.767) ENVELOPE(17.000,17.000,66.833,66.833) |
geographic |
Umeälven Piteälven |
geographic_facet |
Umeälven Piteälven |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_relation |
https://pub.epsilon.slu.se/987/1/PAPER_0_FINAL_in_Thesis_e-version.pdf Rivinoja, Peter (2005). Migration problems of Atlantic salmon (Salmo salar L.) in flow regulated rivers. Diss. (sammanfattning/summary) Umeå : Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae, 1652-6880 2005:114 ISBN 91-576-6913-9 [Doctoral thesis] |
_version_ |
1801373596008841216 |