Impacts of a weir and power station on downstream migrating Atlantic salmon smolts in a German river
Weirs are barriers built across rivers for a wide range of other purposes than hydropower production. Like hydropower installations, weirs can negatively impact fish migrations. Downstream migration and mortality of Atlantic salmon smolts were studied during passage of a weir and power station by ta...
Main Authors: | , , , , , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
WILEY
2020
|
Subjects: | |
Online Access: | https://kups.ub.uni-koeln.de/33181/ |
id |
ftubkoeln:oai:USBKOELN.ub.uni-koeln.de:33181 |
---|---|
record_format |
openpolar |
spelling |
ftubkoeln:oai:USBKOELN.ub.uni-koeln.de:33181 2023-05-15T15:30:58+02:00 Impacts of a weir and power station on downstream migrating Atlantic salmon smolts in a German river Havn, Torgeir B. Thorstad, Eva B. Borcherding, Jost Heermann, Lisa Teichert, Maxim A. K. Ingendahl, Detlev Tambets, Meelis Saether, Stein Are Okland, Finn 2020 https://kups.ub.uni-koeln.de/33181/ eng eng WILEY Havn, Torgeir B., Thorstad, Eva B., Borcherding, Jost, Heermann, Lisa, Teichert, Maxim A. K., Ingendahl, Detlev, Tambets, Meelis, Saether, Stein Are and Okland, Finn (2020). Impacts of a weir and power station on downstream migrating Atlantic salmon smolts in a German river. River Res. Appl., 36 (5). S. 784 - 797. HOBOKEN: WILEY. ISSN 1535-1467 ddc:no doc-type:article publishedVersion 2020 ftubkoeln 2022-11-09T07:23:53Z Weirs are barriers built across rivers for a wide range of other purposes than hydropower production. Like hydropower installations, weirs can negatively impact fish migrations. Downstream migration and mortality of Atlantic salmon smolts were studied during passage of a weir and power station by tagging 227 smolts with radio transmitters. Extra loss of smolts due to the weir and adjacent reservoir was 5.2%. Mortality was likely related to physical damage imposed to the smolts and/or increased predation risk. Extra loss of smolts did not differ between the weir and the power station (7.2%). Migration speeds were reduced at the power station but not at the weir. We conclude that mortality at one power station site may differ considerably among years, because the mortality was more than four times higher in a previous year than in this study. Increased river discharge seemed to decrease mortality and increase migration speeds at the power station. Article in Journal/Newspaper Atlantic salmon Cologne University: KUPS Weir ENVELOPE(177.167,177.167,-84.983,-84.983) |
institution |
Open Polar |
collection |
Cologne University: KUPS |
op_collection_id |
ftubkoeln |
language |
English |
topic |
ddc:no |
spellingShingle |
ddc:no Havn, Torgeir B. Thorstad, Eva B. Borcherding, Jost Heermann, Lisa Teichert, Maxim A. K. Ingendahl, Detlev Tambets, Meelis Saether, Stein Are Okland, Finn Impacts of a weir and power station on downstream migrating Atlantic salmon smolts in a German river |
topic_facet |
ddc:no |
description |
Weirs are barriers built across rivers for a wide range of other purposes than hydropower production. Like hydropower installations, weirs can negatively impact fish migrations. Downstream migration and mortality of Atlantic salmon smolts were studied during passage of a weir and power station by tagging 227 smolts with radio transmitters. Extra loss of smolts due to the weir and adjacent reservoir was 5.2%. Mortality was likely related to physical damage imposed to the smolts and/or increased predation risk. Extra loss of smolts did not differ between the weir and the power station (7.2%). Migration speeds were reduced at the power station but not at the weir. We conclude that mortality at one power station site may differ considerably among years, because the mortality was more than four times higher in a previous year than in this study. Increased river discharge seemed to decrease mortality and increase migration speeds at the power station. |
format |
Article in Journal/Newspaper |
author |
Havn, Torgeir B. Thorstad, Eva B. Borcherding, Jost Heermann, Lisa Teichert, Maxim A. K. Ingendahl, Detlev Tambets, Meelis Saether, Stein Are Okland, Finn |
author_facet |
Havn, Torgeir B. Thorstad, Eva B. Borcherding, Jost Heermann, Lisa Teichert, Maxim A. K. Ingendahl, Detlev Tambets, Meelis Saether, Stein Are Okland, Finn |
author_sort |
Havn, Torgeir B. |
title |
Impacts of a weir and power station on downstream migrating Atlantic salmon smolts in a German river |
title_short |
Impacts of a weir and power station on downstream migrating Atlantic salmon smolts in a German river |
title_full |
Impacts of a weir and power station on downstream migrating Atlantic salmon smolts in a German river |
title_fullStr |
Impacts of a weir and power station on downstream migrating Atlantic salmon smolts in a German river |
title_full_unstemmed |
Impacts of a weir and power station on downstream migrating Atlantic salmon smolts in a German river |
title_sort |
impacts of a weir and power station on downstream migrating atlantic salmon smolts in a german river |
publisher |
WILEY |
publishDate |
2020 |
url |
https://kups.ub.uni-koeln.de/33181/ |
long_lat |
ENVELOPE(177.167,177.167,-84.983,-84.983) |
geographic |
Weir |
geographic_facet |
Weir |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_relation |
Havn, Torgeir B., Thorstad, Eva B., Borcherding, Jost, Heermann, Lisa, Teichert, Maxim A. K., Ingendahl, Detlev, Tambets, Meelis, Saether, Stein Are and Okland, Finn (2020). Impacts of a weir and power station on downstream migrating Atlantic salmon smolts in a German river. River Res. Appl., 36 (5). S. 784 - 797. HOBOKEN: WILEY. ISSN 1535-1467 |
_version_ |
1766361458240651264 |