Contemporary ocean warming and freshwater conditions are related to later sea age at maturity in Atlantic salmon spawning in Norwegian rivers
Atlantic salmon populations are reported to be declining throughout its range, raising major management concerns. Variation in adult fish abundance may be due to variation in survival, growth, and timing of life history decisions. Given the complex life history, utilizing highly divergent habitats,...
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Online Access: | http://hdl.handle.net/11250/2449879 https://doi.org/10.1002/ece3.337 |
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ftninstnf:oai:brage.nina.no:11250/2449879 2024-06-23T07:51:20+00:00 Contemporary ocean warming and freshwater conditions are related to later sea age at maturity in Atlantic salmon spawning in Norwegian rivers Villar, Jaime Otero Jensen, Arne Johan Stenseth, Nils Christian Storvik, Geir Olve Vøllestad, Leif Asbjørn L'Abée Lund, Henning Norway 2012 application/pdf http://hdl.handle.net/11250/2449879 https://doi.org/10.1002/ece3.337 eng eng Norges forskningsråd: 179569 Ecology and Evolution. 2012, 2 (9), 2192-2203. urn:issn:2045-7758 http://hdl.handle.net/11250/2449879 https://doi.org/10.1002/ece3.337 cristin:946895 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no 2192-2203 2 Ecology and Evolution 9 discharge maturation Norway Salmo salar sea surface temperature VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 Journal article Peer reviewed 2012 ftninstnf https://doi.org/10.1002/ece3.337 2024-06-07T03:57:56Z Atlantic salmon populations are reported to be declining throughout its range, raising major management concerns. Variation in adult fish abundance may be due to variation in survival, growth, and timing of life history decisions. Given the complex life history, utilizing highly divergent habitats, the reasons for declines may be multiple and difficult to disentangle. Using recreational angling data of two sea age groups, one-sea-winter (1SW) and two-sea-winter (2SW) fish originated from the same smolt year class, we show that sea age at maturity of the returns has increased in 59 Norwegian rivers over the cohorts 1991– 2005. By means of linear mixed-effects models we found that the proportion of 1SW fish spawning in Norway has decreased concomitant with the increasing sea surface temperature experienced by the fish in autumn during their first year at sea. Furthermore, the decrease in the proportion of 1SW fish was influenced by freshwater conditions as measured by water discharge during summer months 1 year ahead of seaward migration. These results suggest that part of the variability in age at maturity can be explained by the large-scale changes occurring in the north-eastern Atlantic pelagic food web affecting postsmolt growth, and by differences in river conditions influencing presmolt growth rate and later upstream migration. publishedVersion Article in Journal/Newspaper Atlantic salmon Salmo salar Norwegian Institute for Nature Research: Brage NINA Norway Ecology and Evolution 2 9 2192 2203 |
institution |
Open Polar |
collection |
Norwegian Institute for Nature Research: Brage NINA |
op_collection_id |
ftninstnf |
language |
English |
topic |
discharge maturation Norway Salmo salar sea surface temperature VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 |
spellingShingle |
discharge maturation Norway Salmo salar sea surface temperature VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 Villar, Jaime Otero Jensen, Arne Johan Stenseth, Nils Christian Storvik, Geir Olve Vøllestad, Leif Asbjørn L'Abée Lund, Henning Contemporary ocean warming and freshwater conditions are related to later sea age at maturity in Atlantic salmon spawning in Norwegian rivers |
topic_facet |
discharge maturation Norway Salmo salar sea surface temperature VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 |
description |
Atlantic salmon populations are reported to be declining throughout its range, raising major management concerns. Variation in adult fish abundance may be due to variation in survival, growth, and timing of life history decisions. Given the complex life history, utilizing highly divergent habitats, the reasons for declines may be multiple and difficult to disentangle. Using recreational angling data of two sea age groups, one-sea-winter (1SW) and two-sea-winter (2SW) fish originated from the same smolt year class, we show that sea age at maturity of the returns has increased in 59 Norwegian rivers over the cohorts 1991– 2005. By means of linear mixed-effects models we found that the proportion of 1SW fish spawning in Norway has decreased concomitant with the increasing sea surface temperature experienced by the fish in autumn during their first year at sea. Furthermore, the decrease in the proportion of 1SW fish was influenced by freshwater conditions as measured by water discharge during summer months 1 year ahead of seaward migration. These results suggest that part of the variability in age at maturity can be explained by the large-scale changes occurring in the north-eastern Atlantic pelagic food web affecting postsmolt growth, and by differences in river conditions influencing presmolt growth rate and later upstream migration. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Villar, Jaime Otero Jensen, Arne Johan Stenseth, Nils Christian Storvik, Geir Olve Vøllestad, Leif Asbjørn L'Abée Lund, Henning |
author_facet |
Villar, Jaime Otero Jensen, Arne Johan Stenseth, Nils Christian Storvik, Geir Olve Vøllestad, Leif Asbjørn L'Abée Lund, Henning |
author_sort |
Villar, Jaime Otero |
title |
Contemporary ocean warming and freshwater conditions are related to later sea age at maturity in Atlantic salmon spawning in Norwegian rivers |
title_short |
Contemporary ocean warming and freshwater conditions are related to later sea age at maturity in Atlantic salmon spawning in Norwegian rivers |
title_full |
Contemporary ocean warming and freshwater conditions are related to later sea age at maturity in Atlantic salmon spawning in Norwegian rivers |
title_fullStr |
Contemporary ocean warming and freshwater conditions are related to later sea age at maturity in Atlantic salmon spawning in Norwegian rivers |
title_full_unstemmed |
Contemporary ocean warming and freshwater conditions are related to later sea age at maturity in Atlantic salmon spawning in Norwegian rivers |
title_sort |
contemporary ocean warming and freshwater conditions are related to later sea age at maturity in atlantic salmon spawning in norwegian rivers |
publishDate |
2012 |
url |
http://hdl.handle.net/11250/2449879 https://doi.org/10.1002/ece3.337 |
op_coverage |
Norway |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
2192-2203 2 Ecology and Evolution 9 |
op_relation |
Norges forskningsråd: 179569 Ecology and Evolution. 2012, 2 (9), 2192-2203. urn:issn:2045-7758 http://hdl.handle.net/11250/2449879 https://doi.org/10.1002/ece3.337 cristin:946895 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no |
op_doi |
https://doi.org/10.1002/ece3.337 |
container_title |
Ecology and Evolution |
container_volume |
2 |
container_issue |
9 |
container_start_page |
2192 |
op_container_end_page |
2203 |
_version_ |
1802642397175218176 |