Biotic and abiotic determinants of the ascent behaviour of adult Atlantic salmon transiting passable waterfalls
The spawning migration of Atlantic salmon has been characterized by tracking salmon carrying electronic tags as they ascend rivers, but still little is known about how natural obstacles such as waterfalls influence migratory behaviour and how such behaviours are mediated by various biotic (e.g., fis...
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Online Access: | http://hdl.handle.net/11250/2572885 https://doi.org/10.1002/rra.3329 |
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ftninstnf:oai:brage.nina.no:11250/2572885 2023-05-15T15:30:31+02:00 Biotic and abiotic determinants of the ascent behaviour of adult Atlantic salmon transiting passable waterfalls Lennox, Robert J. Thorstad, Eva Bonsak Diserud, Ola Håvard Økland, Finn Cooke, Steven J. Aasestad, Ingar Forseth, Torbjørn 2018 application/octet-stream http://hdl.handle.net/11250/2572885 https://doi.org/10.1002/rra.3329 eng eng Andre: Numedals‐Laugens Brugseierforening urn:issn:1535-1459 http://hdl.handle.net/11250/2572885 https://doi.org/10.1002/rra.3329 cristin:1604126 Rivers Research and Applications: an international journal devoted to river research and management biotelemetry exploitation migration Salmonidae straying waterfall VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 Journal article Peer reviewed 2018 ftninstnf https://doi.org/10.1002/rra.3329 2021-12-23T07:16:56Z The spawning migration of Atlantic salmon has been characterized by tracking salmon carrying electronic tags as they ascend rivers, but still little is known about how natural obstacles such as waterfalls influence migratory behaviour and how such behaviours are mediated by various biotic (e.g., fish size) and abiotic (e.g., discharge, water temperature, and barometric pressure) factors. The Norwegian river Numedalslågen is interrupted by natural waterfalls ranging in height from 2 to 6 m. We tagged 113 Atlantic salmon with radio transmitters in the estuary and used stationary radio telemetry stations to track fish. Ninety‐one salmon were recorded in Numedalslågen, 39 of which remained in the river for spawning. Large salmon moved farther and faster upriver but also delayed longer and had lower daily probability to pass the second waterfall. Delay below and passage probability at the final, largest waterfall was affected by water discharge, wherein passage occurred when discharge was declining. Barometric pressure also influenced daily probability of ascent, albeit in opposite directions for each waterfall. Importantly, we also found that salmon with surgically implanted radio transmitters moved farther upriver on average and delayed less time below one of the waterfalls than those with externally attached transmitters. Although there is variance in timing arising from individual decision‐making, we showed that natural waterfalls delay progress of Atlantic salmon on their spawning migration and that both biotic (i.e., size) and abiotic (i.e., barometric pressure and discharge) factors influenced the salmon's decisions to pass waterfalls that they encounter. biotelemetry, exploitation, migration, Salmonidae, straying, waterfall acceptedVersion Article in Journal/Newspaper Atlantic salmon Norwegian Institute for Nature Research: Brage NINA River Research and Applications 34 8 907 917 |
institution |
Open Polar |
collection |
Norwegian Institute for Nature Research: Brage NINA |
op_collection_id |
ftninstnf |
language |
English |
topic |
biotelemetry exploitation migration Salmonidae straying waterfall VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 |
spellingShingle |
biotelemetry exploitation migration Salmonidae straying waterfall VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 Lennox, Robert J. Thorstad, Eva Bonsak Diserud, Ola Håvard Økland, Finn Cooke, Steven J. Aasestad, Ingar Forseth, Torbjørn Biotic and abiotic determinants of the ascent behaviour of adult Atlantic salmon transiting passable waterfalls |
topic_facet |
biotelemetry exploitation migration Salmonidae straying waterfall VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 |
description |
The spawning migration of Atlantic salmon has been characterized by tracking salmon carrying electronic tags as they ascend rivers, but still little is known about how natural obstacles such as waterfalls influence migratory behaviour and how such behaviours are mediated by various biotic (e.g., fish size) and abiotic (e.g., discharge, water temperature, and barometric pressure) factors. The Norwegian river Numedalslågen is interrupted by natural waterfalls ranging in height from 2 to 6 m. We tagged 113 Atlantic salmon with radio transmitters in the estuary and used stationary radio telemetry stations to track fish. Ninety‐one salmon were recorded in Numedalslågen, 39 of which remained in the river for spawning. Large salmon moved farther and faster upriver but also delayed longer and had lower daily probability to pass the second waterfall. Delay below and passage probability at the final, largest waterfall was affected by water discharge, wherein passage occurred when discharge was declining. Barometric pressure also influenced daily probability of ascent, albeit in opposite directions for each waterfall. Importantly, we also found that salmon with surgically implanted radio transmitters moved farther upriver on average and delayed less time below one of the waterfalls than those with externally attached transmitters. Although there is variance in timing arising from individual decision‐making, we showed that natural waterfalls delay progress of Atlantic salmon on their spawning migration and that both biotic (i.e., size) and abiotic (i.e., barometric pressure and discharge) factors influenced the salmon's decisions to pass waterfalls that they encounter. biotelemetry, exploitation, migration, Salmonidae, straying, waterfall acceptedVersion |
format |
Article in Journal/Newspaper |
author |
Lennox, Robert J. Thorstad, Eva Bonsak Diserud, Ola Håvard Økland, Finn Cooke, Steven J. Aasestad, Ingar Forseth, Torbjørn |
author_facet |
Lennox, Robert J. Thorstad, Eva Bonsak Diserud, Ola Håvard Økland, Finn Cooke, Steven J. Aasestad, Ingar Forseth, Torbjørn |
author_sort |
Lennox, Robert J. |
title |
Biotic and abiotic determinants of the ascent behaviour of adult Atlantic salmon transiting passable waterfalls |
title_short |
Biotic and abiotic determinants of the ascent behaviour of adult Atlantic salmon transiting passable waterfalls |
title_full |
Biotic and abiotic determinants of the ascent behaviour of adult Atlantic salmon transiting passable waterfalls |
title_fullStr |
Biotic and abiotic determinants of the ascent behaviour of adult Atlantic salmon transiting passable waterfalls |
title_full_unstemmed |
Biotic and abiotic determinants of the ascent behaviour of adult Atlantic salmon transiting passable waterfalls |
title_sort |
biotic and abiotic determinants of the ascent behaviour of adult atlantic salmon transiting passable waterfalls |
publishDate |
2018 |
url |
http://hdl.handle.net/11250/2572885 https://doi.org/10.1002/rra.3329 |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_source |
Rivers Research and Applications: an international journal devoted to river research and management |
op_relation |
Andre: Numedals‐Laugens Brugseierforening urn:issn:1535-1459 http://hdl.handle.net/11250/2572885 https://doi.org/10.1002/rra.3329 cristin:1604126 |
op_doi |
https://doi.org/10.1002/rra.3329 |
container_title |
River Research and Applications |
container_volume |
34 |
container_issue |
8 |
container_start_page |
907 |
op_container_end_page |
917 |
_version_ |
1766360969566486528 |