Parasite induced mortality is context dependent in Atlantic salmon: insights from an individual-based model
Abstract An individual-based model was parameterized to explore the impact of a crustacean ectoparasite (sea louse, Lepeophtheirus salmonis & Caligus spp .) on migrating Atlantic salmon smolt. The model explores how environmental and intrinsic factors can modulate the effect of sea lice on survi...
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Springer Science and Business Media LLC
2019
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Online Access: | http://dx.doi.org/10.1038/s41598-019-53871-2 http://www.nature.com/articles/s41598-019-53871-2.pdf http://www.nature.com/articles/s41598-019-53871-2 |
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crspringernat:10.1038/s41598-019-53871-2 2023-05-15T15:30:25+02:00 Parasite induced mortality is context dependent in Atlantic salmon: insights from an individual-based model Vollset, Knut Wiik 2019 http://dx.doi.org/10.1038/s41598-019-53871-2 http://www.nature.com/articles/s41598-019-53871-2.pdf http://www.nature.com/articles/s41598-019-53871-2 en eng Springer Science and Business Media LLC https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 CC-BY Scientific Reports volume 9, issue 1 ISSN 2045-2322 Multidisciplinary journal-article 2019 crspringernat https://doi.org/10.1038/s41598-019-53871-2 2022-01-04T10:28:46Z Abstract An individual-based model was parameterized to explore the impact of a crustacean ectoparasite (sea louse, Lepeophtheirus salmonis & Caligus spp .) on migrating Atlantic salmon smolt. The model explores how environmental and intrinsic factors can modulate the effect of sea lice on survival, growth and maturation of Atlantic salmon at sea. Relative to other effects, the parasite infestation pressure from fish farms and the encounter process emerge as the most important parameters. Although small variations in parasite-induced mortality may be masked by variable environmental effects, episodes of high infestation pressure from fish farms should be observable in wild populations of Atlantic salmon if laboratory studies accurately reflect the physiological effects of sea lice. Increases in temperature in the model negatively influenced fish survival by affecting the development time of the parasite at a rate that was not compensated for by the growth of the host. Discharge from rivers was parameterized to increase migration speed and influenced parasite induced mortality by decreasing time spent in areas with increased infestation pressure. Initial size and growth of the host was inversely related to the impact of the parasite because of size-dependent parasite-induced mortality in the early phase of migration. Overall, the model illustrates how environmental factors modulate effects on the host population by impacting either the parasite load or the relative effect of the parasite. The results suggest that linking population-level effects to parasite infestation pressure across climatic and environmental gradients may be challenging without correctly accounting for these effects. Article in Journal/Newspaper Atlantic salmon Springer Nature (via Crossref) Scientific Reports 9 1 |
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Multidisciplinary Vollset, Knut Wiik Parasite induced mortality is context dependent in Atlantic salmon: insights from an individual-based model |
topic_facet |
Multidisciplinary |
description |
Abstract An individual-based model was parameterized to explore the impact of a crustacean ectoparasite (sea louse, Lepeophtheirus salmonis & Caligus spp .) on migrating Atlantic salmon smolt. The model explores how environmental and intrinsic factors can modulate the effect of sea lice on survival, growth and maturation of Atlantic salmon at sea. Relative to other effects, the parasite infestation pressure from fish farms and the encounter process emerge as the most important parameters. Although small variations in parasite-induced mortality may be masked by variable environmental effects, episodes of high infestation pressure from fish farms should be observable in wild populations of Atlantic salmon if laboratory studies accurately reflect the physiological effects of sea lice. Increases in temperature in the model negatively influenced fish survival by affecting the development time of the parasite at a rate that was not compensated for by the growth of the host. Discharge from rivers was parameterized to increase migration speed and influenced parasite induced mortality by decreasing time spent in areas with increased infestation pressure. Initial size and growth of the host was inversely related to the impact of the parasite because of size-dependent parasite-induced mortality in the early phase of migration. Overall, the model illustrates how environmental factors modulate effects on the host population by impacting either the parasite load or the relative effect of the parasite. The results suggest that linking population-level effects to parasite infestation pressure across climatic and environmental gradients may be challenging without correctly accounting for these effects. |
format |
Article in Journal/Newspaper |
author |
Vollset, Knut Wiik |
author_facet |
Vollset, Knut Wiik |
author_sort |
Vollset, Knut Wiik |
title |
Parasite induced mortality is context dependent in Atlantic salmon: insights from an individual-based model |
title_short |
Parasite induced mortality is context dependent in Atlantic salmon: insights from an individual-based model |
title_full |
Parasite induced mortality is context dependent in Atlantic salmon: insights from an individual-based model |
title_fullStr |
Parasite induced mortality is context dependent in Atlantic salmon: insights from an individual-based model |
title_full_unstemmed |
Parasite induced mortality is context dependent in Atlantic salmon: insights from an individual-based model |
title_sort |
parasite induced mortality is context dependent in atlantic salmon: insights from an individual-based model |
publisher |
Springer Science and Business Media LLC |
publishDate |
2019 |
url |
http://dx.doi.org/10.1038/s41598-019-53871-2 http://www.nature.com/articles/s41598-019-53871-2.pdf http://www.nature.com/articles/s41598-019-53871-2 |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_source |
Scientific Reports volume 9, issue 1 ISSN 2045-2322 |
op_rights |
https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41598-019-53871-2 |
container_title |
Scientific Reports |
container_volume |
9 |
container_issue |
1 |
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1766360855733075968 |