Micro- and macro-habitat selection of Atlantic salmon, Salmo salar, post-smolts in relation to marine environmental cues
Abstract Atlantic salmon is an economically and culturally important species. The species encounters several natural and man-made threats during its migration between fresh water and the ocean, which in combination may explain its ongoing decline. With the aim to better understand whether post-smolt...
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Oxford University Press (OUP)
2022
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Online Access: | http://dx.doi.org/10.1093/icesjms/fsac064 https://academic.oup.com/icesjms/article-pdf/79/4/1394/43782675/fsac064.pdf |
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croxfordunivpr:10.1093/icesjms/fsac064 2024-09-15T17:56:01+00:00 Micro- and macro-habitat selection of Atlantic salmon, Salmo salar, post-smolts in relation to marine environmental cues Jensen, J L A Strøm, J F Nikolopoulos, A Primicerio, R Skarðhamar, J Atencio, B J Strand, J E T Bjørn, P A Bøhn, T Secor, David Lakseklyngen SA Institute of Marine Research 2022 http://dx.doi.org/10.1093/icesjms/fsac064 https://academic.oup.com/icesjms/article-pdf/79/4/1394/43782675/fsac064.pdf en eng Oxford University Press (OUP) https://creativecommons.org/licenses/by/4.0/ ICES Journal of Marine Science volume 79, issue 4, page 1394-1407 ISSN 1054-3139 1095-9289 journal-article 2022 croxfordunivpr https://doi.org/10.1093/icesjms/fsac064 2024-08-27T04:16:43Z Abstract Atlantic salmon is an economically and culturally important species. The species encounters several natural and man-made threats during its migration between fresh water and the ocean, which in combination may explain its ongoing decline. With the aim to better understand whether post-smolt behaviour is influenced by physical oceanographic conditions, the migratory behaviour of 173 post-smolts in a high-latitude Norwegian fjord was investigated, combining acoustic telemetry with site- and time-specific environmental variables from an oceanographic model. Most post-smolts (94%) performed a unidirectional migration out the fjord. Progression rates were relatively high (0.42–2.41 km h−1; 0.84–3.78 BL s−1) and increased with distance from the river. While post-smolts had an affinity for lower salinities in the inner fjord, statistical models failed to detect any significant relationship between the small-scale (within arrays) migratory behaviour and salinity, temperature, or coastal surface currents within the fjord. In the outer part, the post-smolts predominantly exited the fjord system through the strait with the highest surface salinities and lowest temperatures, independently of the current direction. Our findings indicate that the macro-habitat selection of the Atlantic salmon post-smolts was influenced by environmental factors: the post-smolts directed their migration towards “ocean cues.” However, this was not confirmed on the micro-habitat level. Article in Journal/Newspaper Atlantic salmon Salmo salar Oxford University Press ICES Journal of Marine Science 79 4 1394 1407 |
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Oxford University Press |
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croxfordunivpr |
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English |
description |
Abstract Atlantic salmon is an economically and culturally important species. The species encounters several natural and man-made threats during its migration between fresh water and the ocean, which in combination may explain its ongoing decline. With the aim to better understand whether post-smolt behaviour is influenced by physical oceanographic conditions, the migratory behaviour of 173 post-smolts in a high-latitude Norwegian fjord was investigated, combining acoustic telemetry with site- and time-specific environmental variables from an oceanographic model. Most post-smolts (94%) performed a unidirectional migration out the fjord. Progression rates were relatively high (0.42–2.41 km h−1; 0.84–3.78 BL s−1) and increased with distance from the river. While post-smolts had an affinity for lower salinities in the inner fjord, statistical models failed to detect any significant relationship between the small-scale (within arrays) migratory behaviour and salinity, temperature, or coastal surface currents within the fjord. In the outer part, the post-smolts predominantly exited the fjord system through the strait with the highest surface salinities and lowest temperatures, independently of the current direction. Our findings indicate that the macro-habitat selection of the Atlantic salmon post-smolts was influenced by environmental factors: the post-smolts directed their migration towards “ocean cues.” However, this was not confirmed on the micro-habitat level. |
author2 |
Secor, David Lakseklyngen SA Institute of Marine Research |
format |
Article in Journal/Newspaper |
author |
Jensen, J L A Strøm, J F Nikolopoulos, A Primicerio, R Skarðhamar, J Atencio, B J Strand, J E T Bjørn, P A Bøhn, T |
spellingShingle |
Jensen, J L A Strøm, J F Nikolopoulos, A Primicerio, R Skarðhamar, J Atencio, B J Strand, J E T Bjørn, P A Bøhn, T Micro- and macro-habitat selection of Atlantic salmon, Salmo salar, post-smolts in relation to marine environmental cues |
author_facet |
Jensen, J L A Strøm, J F Nikolopoulos, A Primicerio, R Skarðhamar, J Atencio, B J Strand, J E T Bjørn, P A Bøhn, T |
author_sort |
Jensen, J L A |
title |
Micro- and macro-habitat selection of Atlantic salmon, Salmo salar, post-smolts in relation to marine environmental cues |
title_short |
Micro- and macro-habitat selection of Atlantic salmon, Salmo salar, post-smolts in relation to marine environmental cues |
title_full |
Micro- and macro-habitat selection of Atlantic salmon, Salmo salar, post-smolts in relation to marine environmental cues |
title_fullStr |
Micro- and macro-habitat selection of Atlantic salmon, Salmo salar, post-smolts in relation to marine environmental cues |
title_full_unstemmed |
Micro- and macro-habitat selection of Atlantic salmon, Salmo salar, post-smolts in relation to marine environmental cues |
title_sort |
micro- and macro-habitat selection of atlantic salmon, salmo salar, post-smolts in relation to marine environmental cues |
publisher |
Oxford University Press (OUP) |
publishDate |
2022 |
url |
http://dx.doi.org/10.1093/icesjms/fsac064 https://academic.oup.com/icesjms/article-pdf/79/4/1394/43782675/fsac064.pdf |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
ICES Journal of Marine Science volume 79, issue 4, page 1394-1407 ISSN 1054-3139 1095-9289 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1093/icesjms/fsac064 |
container_title |
ICES Journal of Marine Science |
container_volume |
79 |
container_issue |
4 |
container_start_page |
1394 |
op_container_end_page |
1407 |
_version_ |
1810432234215178240 |