Diel migration pattern of Atlantic salmon (Salmo salar) and sea trout (Salmo trutta) smolts : an assessment of environmental cues
Author's accepted version (post-print). The timing of smolt migration is a key phenological trait with profound implications for individual survival during both river descent and the subsequent sea sojourn of anadromous fish. We studied relationships between the time of smolt migration, water t...
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Online Access: | http://hdl.handle.net/11250/2574155 https://doi.org/10.1111/eff.12298 |
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ftnorduniv:oai:nordopen.nord.no:11250/2574155 2023-05-15T15:29:58+02:00 Diel migration pattern of Atlantic salmon (Salmo salar) and sea trout (Salmo trutta) smolts : an assessment of environmental cues Haraldstad, Tormod Kroglund, Frode Kristensen, Torstein Jonsson, Bror Haugen, Thrond O. 2016 application/pdf http://hdl.handle.net/11250/2574155 https://doi.org/10.1111/eff.12298 eng eng Wiley Miljødirektoratet: 05040029-6 Norges forskningsråd: 160016 Haraldstad, T., Kroglund, F., Kristensen, T., Jonsson, B. & Haugen, Thrond. (2016). Diel migration pattern of Atlantic salmon (Salmo salar) and sea trout (Salmo trutta) smolts: an assessment of environmental cues. Ecology of Freshwater Fish, 26(4), 541-551. doi: urn:issn:1600-0633 http://hdl.handle.net/11250/2574155 https://doi.org/10.1111/eff.12298 cristin:1372708 541-551 26 Ecology of Freshwater Fish 4 VDP::Matematikk og Naturvitenskap: 400::Basale biofag: 470 Journal article Peer reviewed 2016 ftnorduniv https://doi.org/10.1111/eff.12298 2021-07-13T18:12:24Z Author's accepted version (post-print). The timing of smolt migration is a key phenological trait with profound implications for individual survival during both river descent and the subsequent sea sojourn of anadromous fish. We studied relationships between the time of smolt migration, water temperature and light intensity for Atlantic salmon (Salmo salar) and sea trout (Salmo trutta). During 2006–2012, migrating smolts descending the southern Norway River Storelva were caught in a rotary screw trap located at the river mouth. The date of 50% cumulative smolt descent correlated significantly with the date when the river temperature exceeded 8°C for both Atlantic salmon and sea trout smolts. In 2010, smolts of both species were passive integrated transponder (PIT)-tagged, and the diel timing of their migration was precisely documented. The degree of night migration decreased in both species as the river temperature rose, and at temperatures above 12–13°C, more smolts migrated during day than during night. A multinomial model was fitted for estimating temperature and species effects on probabilities of migration during night, daytime, dusk and dawn. Atlantic salmon smolts preferred migrating under lower light intensities than sea trout smolts during early, but not late spring when both species migrated during bright daylight. In accordance with the early-season tendency to migrate at night, Atlantic salmon smolts migrated more during darker hours of the day than sea trout. In both species, smaller smolts migrated under dark conditions than during light conditions. Most of the findings on thermal, light and temporal effects on the observed smolt migration pattern can be explained as adaptations to predation avoidance. migration timing, phenology, temperature influence, light intensities, anadromous fish, predation avoidance acceptedVersion Article in Journal/Newspaper Atlantic salmon Salmo salar Open archive Nord universitet Norway Storelva ENVELOPE(29.103,29.103,70.855,70.855) Ecology of Freshwater Fish 26 4 541 551 |
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Open Polar |
collection |
Open archive Nord universitet |
op_collection_id |
ftnorduniv |
language |
English |
topic |
VDP::Matematikk og Naturvitenskap: 400::Basale biofag: 470 |
spellingShingle |
VDP::Matematikk og Naturvitenskap: 400::Basale biofag: 470 Haraldstad, Tormod Kroglund, Frode Kristensen, Torstein Jonsson, Bror Haugen, Thrond O. Diel migration pattern of Atlantic salmon (Salmo salar) and sea trout (Salmo trutta) smolts : an assessment of environmental cues |
topic_facet |
VDP::Matematikk og Naturvitenskap: 400::Basale biofag: 470 |
description |
Author's accepted version (post-print). The timing of smolt migration is a key phenological trait with profound implications for individual survival during both river descent and the subsequent sea sojourn of anadromous fish. We studied relationships between the time of smolt migration, water temperature and light intensity for Atlantic salmon (Salmo salar) and sea trout (Salmo trutta). During 2006–2012, migrating smolts descending the southern Norway River Storelva were caught in a rotary screw trap located at the river mouth. The date of 50% cumulative smolt descent correlated significantly with the date when the river temperature exceeded 8°C for both Atlantic salmon and sea trout smolts. In 2010, smolts of both species were passive integrated transponder (PIT)-tagged, and the diel timing of their migration was precisely documented. The degree of night migration decreased in both species as the river temperature rose, and at temperatures above 12–13°C, more smolts migrated during day than during night. A multinomial model was fitted for estimating temperature and species effects on probabilities of migration during night, daytime, dusk and dawn. Atlantic salmon smolts preferred migrating under lower light intensities than sea trout smolts during early, but not late spring when both species migrated during bright daylight. In accordance with the early-season tendency to migrate at night, Atlantic salmon smolts migrated more during darker hours of the day than sea trout. In both species, smaller smolts migrated under dark conditions than during light conditions. Most of the findings on thermal, light and temporal effects on the observed smolt migration pattern can be explained as adaptations to predation avoidance. migration timing, phenology, temperature influence, light intensities, anadromous fish, predation avoidance acceptedVersion |
format |
Article in Journal/Newspaper |
author |
Haraldstad, Tormod Kroglund, Frode Kristensen, Torstein Jonsson, Bror Haugen, Thrond O. |
author_facet |
Haraldstad, Tormod Kroglund, Frode Kristensen, Torstein Jonsson, Bror Haugen, Thrond O. |
author_sort |
Haraldstad, Tormod |
title |
Diel migration pattern of Atlantic salmon (Salmo salar) and sea trout (Salmo trutta) smolts : an assessment of environmental cues |
title_short |
Diel migration pattern of Atlantic salmon (Salmo salar) and sea trout (Salmo trutta) smolts : an assessment of environmental cues |
title_full |
Diel migration pattern of Atlantic salmon (Salmo salar) and sea trout (Salmo trutta) smolts : an assessment of environmental cues |
title_fullStr |
Diel migration pattern of Atlantic salmon (Salmo salar) and sea trout (Salmo trutta) smolts : an assessment of environmental cues |
title_full_unstemmed |
Diel migration pattern of Atlantic salmon (Salmo salar) and sea trout (Salmo trutta) smolts : an assessment of environmental cues |
title_sort |
diel migration pattern of atlantic salmon (salmo salar) and sea trout (salmo trutta) smolts : an assessment of environmental cues |
publisher |
Wiley |
publishDate |
2016 |
url |
http://hdl.handle.net/11250/2574155 https://doi.org/10.1111/eff.12298 |
long_lat |
ENVELOPE(29.103,29.103,70.855,70.855) |
geographic |
Norway Storelva |
geographic_facet |
Norway Storelva |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
541-551 26 Ecology of Freshwater Fish 4 |
op_relation |
Miljødirektoratet: 05040029-6 Norges forskningsråd: 160016 Haraldstad, T., Kroglund, F., Kristensen, T., Jonsson, B. & Haugen, Thrond. (2016). Diel migration pattern of Atlantic salmon (Salmo salar) and sea trout (Salmo trutta) smolts: an assessment of environmental cues. Ecology of Freshwater Fish, 26(4), 541-551. doi: urn:issn:1600-0633 http://hdl.handle.net/11250/2574155 https://doi.org/10.1111/eff.12298 cristin:1372708 |
op_doi |
https://doi.org/10.1111/eff.12298 |
container_title |
Ecology of Freshwater Fish |
container_volume |
26 |
container_issue |
4 |
container_start_page |
541 |
op_container_end_page |
551 |
_version_ |
1766360417331838976 |