Downstream migration of landlocked Atlantic salmon smolt in a regulated river-Effects of multiple passage at dams with programmed spill
In many rivers, downstream-migrating salmonid smolts must pass multiple dams often with high losses as a result. Fish experience mortality both in dam and reservoir passage, and spilling water might allow fish to avoid turbine passage and hence increase migration survival. In River Klaralven, Sweden...
Published in: | River Research and Applications |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Karlstads universitet, Institutionen för miljö- och livsvetenskaper (from 2013)
2024
|
Subjects: | |
Online Access: | http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-99488 https://doi.org/10.1002/rra.4276 |
id |
ftkarlstadsuniv:oai:DiVA.org:kau-99488 |
---|---|
record_format |
openpolar |
spelling |
ftkarlstadsuniv:oai:DiVA.org:kau-99488 2024-05-19T07:37:39+00:00 Downstream migration of landlocked Atlantic salmon smolt in a regulated river-Effects of multiple passage at dams with programmed spill Norrgård, Johnny R Nyqvist, Daniel Greenberg, Larry Bergman, Eva 2024 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-99488 https://doi.org/10.1002/rra.4276 eng eng Karlstads universitet, Institutionen för miljö- och livsvetenskaper (from 2013) Gammelkroppa Lax AB, Sweden Politecnico diTorino, Italy Rivers Research and Applications : an international journal devoted to river research and management, 1535-1459, 2024 orcid:0000-0002-3098-0594 orcid:0000-0002-3191-7140 orcid:0000-0003-2220-1615 http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-99488 doi:10.1002/rra.4276 ISI:001193912700001 info:eu-repo/semantics/openAccess acoustic telemetry dammed river fish passage migration success Salmo salar Ecology Ekologi Article in journal info:eu-repo/semantics/article text 2024 ftkarlstadsuniv https://doi.org/10.1002/rra.4276 2024-04-30T23:34:43Z In many rivers, downstream-migrating salmonid smolts must pass multiple dams often with high losses as a result. Fish experience mortality both in dam and reservoir passage, and spilling water might allow fish to avoid turbine passage and hence increase migration survival. In River Klaralven, Sweden landlocked Atlantic salmon smolts migrate along a 180 km long reach passing eight dams. A previous telemetry study estimated an accumulated migration success of 16% under conditions with no or very little spill. Here we repeat this study, under a planned spill regime at a subset of hydropower dams. Overall passage success through the eight dams was 32%, which is greater than the 16% reported from the same river section in a year without spill. Most of this increase, however, was attributable to the situation at one dam, where spill constituted a large proportion of total discharge. In addition, we found that loss rates km-1 were similar over dammed reaches and the lentic habitats, but greater than in the free-flowing reference reaches. Results for migration speed paralleled this result with the highest speeds observed in the free-flowing reaches. Article in Journal/Newspaper Atlantic salmon Salmo salar Karlstad University: Publications (DIVA) River Research and Applications |
institution |
Open Polar |
collection |
Karlstad University: Publications (DIVA) |
op_collection_id |
ftkarlstadsuniv |
language |
English |
topic |
acoustic telemetry dammed river fish passage migration success Salmo salar Ecology Ekologi |
spellingShingle |
acoustic telemetry dammed river fish passage migration success Salmo salar Ecology Ekologi Norrgård, Johnny R Nyqvist, Daniel Greenberg, Larry Bergman, Eva Downstream migration of landlocked Atlantic salmon smolt in a regulated river-Effects of multiple passage at dams with programmed spill |
topic_facet |
acoustic telemetry dammed river fish passage migration success Salmo salar Ecology Ekologi |
description |
In many rivers, downstream-migrating salmonid smolts must pass multiple dams often with high losses as a result. Fish experience mortality both in dam and reservoir passage, and spilling water might allow fish to avoid turbine passage and hence increase migration survival. In River Klaralven, Sweden landlocked Atlantic salmon smolts migrate along a 180 km long reach passing eight dams. A previous telemetry study estimated an accumulated migration success of 16% under conditions with no or very little spill. Here we repeat this study, under a planned spill regime at a subset of hydropower dams. Overall passage success through the eight dams was 32%, which is greater than the 16% reported from the same river section in a year without spill. Most of this increase, however, was attributable to the situation at one dam, where spill constituted a large proportion of total discharge. In addition, we found that loss rates km-1 were similar over dammed reaches and the lentic habitats, but greater than in the free-flowing reference reaches. Results for migration speed paralleled this result with the highest speeds observed in the free-flowing reaches. |
format |
Article in Journal/Newspaper |
author |
Norrgård, Johnny R Nyqvist, Daniel Greenberg, Larry Bergman, Eva |
author_facet |
Norrgård, Johnny R Nyqvist, Daniel Greenberg, Larry Bergman, Eva |
author_sort |
Norrgård, Johnny R |
title |
Downstream migration of landlocked Atlantic salmon smolt in a regulated river-Effects of multiple passage at dams with programmed spill |
title_short |
Downstream migration of landlocked Atlantic salmon smolt in a regulated river-Effects of multiple passage at dams with programmed spill |
title_full |
Downstream migration of landlocked Atlantic salmon smolt in a regulated river-Effects of multiple passage at dams with programmed spill |
title_fullStr |
Downstream migration of landlocked Atlantic salmon smolt in a regulated river-Effects of multiple passage at dams with programmed spill |
title_full_unstemmed |
Downstream migration of landlocked Atlantic salmon smolt in a regulated river-Effects of multiple passage at dams with programmed spill |
title_sort |
downstream migration of landlocked atlantic salmon smolt in a regulated river-effects of multiple passage at dams with programmed spill |
publisher |
Karlstads universitet, Institutionen för miljö- och livsvetenskaper (from 2013) |
publishDate |
2024 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-99488 https://doi.org/10.1002/rra.4276 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_relation |
Rivers Research and Applications : an international journal devoted to river research and management, 1535-1459, 2024 orcid:0000-0002-3098-0594 orcid:0000-0002-3191-7140 orcid:0000-0003-2220-1615 http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-99488 doi:10.1002/rra.4276 ISI:001193912700001 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/rra.4276 |
container_title |
River Research and Applications |
_version_ |
1799476986419085312 |