Salmon lice increase the age of returning Atlantic salmon
The global increase in the production of domestic farmed fish in open net pens has created concerns about the resilience of wild populations owing to shifts in host–parasite systems in coastal ecosystems. However, little is known about the effects of increased parasite abundance on life-history trai...
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crroyalsociety:10.1098/rsbl.2013.0896 2024-06-02T08:03:31+00:00 Salmon lice increase the age of returning Atlantic salmon Vollset, Knut Wiik Barlaup, Bjørn Torgeir Skoglund, Helge Normann, Eirik Straume Skilbrei, Ove Tommy 2014 http://dx.doi.org/10.1098/rsbl.2013.0896 https://royalsocietypublishing.org/doi/pdf/10.1098/rsbl.2013.0896 https://royalsocietypublishing.org/doi/full-xml/10.1098/rsbl.2013.0896 en eng The Royal Society https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ Biology Letters volume 10, issue 1, page 20130896 ISSN 1744-9561 1744-957X journal-article 2014 crroyalsociety https://doi.org/10.1098/rsbl.2013.0896 2024-05-07T14:16:43Z The global increase in the production of domestic farmed fish in open net pens has created concerns about the resilience of wild populations owing to shifts in host–parasite systems in coastal ecosystems. However, little is known about the effects of increased parasite abundance on life-history traits in wild fish populations. Here, we report the results of two separate studies in which 379 779 hatchery-reared Atlantic salmon smolts were treated (or not) against salmon lice, marked and released. Adults were later recaptured, and we specifically tested whether the age distribution of the returning spawners was affected by the treatment. The estimates of parasite-induced mortality were 31.9% and 0.6% in the River Vosso and River Dale stock experiments, respectively. Age of returning salmon was on average higher in treated versus untreated fish. The percentages of fish returning after one winter at sea were 37.5% and 29.9% for the treated and untreated groups, respectively. We conclude that salmon lice increase the age of returning salmon, either by affecting their age at maturity or by disproportionately increasing mortality in fish that mature early. Article in Journal/Newspaper Atlantic salmon The Royal Society Biology Letters 10 1 20130896 |
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The Royal Society |
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crroyalsociety |
language |
English |
description |
The global increase in the production of domestic farmed fish in open net pens has created concerns about the resilience of wild populations owing to shifts in host–parasite systems in coastal ecosystems. However, little is known about the effects of increased parasite abundance on life-history traits in wild fish populations. Here, we report the results of two separate studies in which 379 779 hatchery-reared Atlantic salmon smolts were treated (or not) against salmon lice, marked and released. Adults were later recaptured, and we specifically tested whether the age distribution of the returning spawners was affected by the treatment. The estimates of parasite-induced mortality were 31.9% and 0.6% in the River Vosso and River Dale stock experiments, respectively. Age of returning salmon was on average higher in treated versus untreated fish. The percentages of fish returning after one winter at sea were 37.5% and 29.9% for the treated and untreated groups, respectively. We conclude that salmon lice increase the age of returning salmon, either by affecting their age at maturity or by disproportionately increasing mortality in fish that mature early. |
format |
Article in Journal/Newspaper |
author |
Vollset, Knut Wiik Barlaup, Bjørn Torgeir Skoglund, Helge Normann, Eirik Straume Skilbrei, Ove Tommy |
spellingShingle |
Vollset, Knut Wiik Barlaup, Bjørn Torgeir Skoglund, Helge Normann, Eirik Straume Skilbrei, Ove Tommy Salmon lice increase the age of returning Atlantic salmon |
author_facet |
Vollset, Knut Wiik Barlaup, Bjørn Torgeir Skoglund, Helge Normann, Eirik Straume Skilbrei, Ove Tommy |
author_sort |
Vollset, Knut Wiik |
title |
Salmon lice increase the age of returning Atlantic salmon |
title_short |
Salmon lice increase the age of returning Atlantic salmon |
title_full |
Salmon lice increase the age of returning Atlantic salmon |
title_fullStr |
Salmon lice increase the age of returning Atlantic salmon |
title_full_unstemmed |
Salmon lice increase the age of returning Atlantic salmon |
title_sort |
salmon lice increase the age of returning atlantic salmon |
publisher |
The Royal Society |
publishDate |
2014 |
url |
http://dx.doi.org/10.1098/rsbl.2013.0896 https://royalsocietypublishing.org/doi/pdf/10.1098/rsbl.2013.0896 https://royalsocietypublishing.org/doi/full-xml/10.1098/rsbl.2013.0896 |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_source |
Biology Letters volume 10, issue 1, page 20130896 ISSN 1744-9561 1744-957X |
op_rights |
https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ |
op_doi |
https://doi.org/10.1098/rsbl.2013.0896 |
container_title |
Biology Letters |
container_volume |
10 |
container_issue |
1 |
container_start_page |
20130896 |
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1800748071241383936 |