The effectiveness of hyposaline treatments against host-attached salmon lice
Understanding how salinity affects marine parasites is vital to understanding their ecology and treatment, particularly for host-parasite systems that traverse marine and freshwater realms such as the globally important Atlantic salmon (Salmo salar), salmon louse (Lepeophtheirus salmonis) system. Gr...
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ftpubmed:oai:pubmedcentral.nih.gov:6502938 2023-05-15T15:32:38+02:00 The effectiveness of hyposaline treatments against host-attached salmon lice Sievers, Michael Oppedal, Frode Ditria, Ellen Wright, Daniel W. 2019-05-06 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6502938/ http://www.ncbi.nlm.nih.gov/pubmed/31061506 https://doi.org/10.1038/s41598-019-43533-8 en eng Nature Publishing Group UK http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6502938/ http://www.ncbi.nlm.nih.gov/pubmed/31061506 http://dx.doi.org/10.1038/s41598-019-43533-8 © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. CC-BY Article Text 2019 ftpubmed https://doi.org/10.1038/s41598-019-43533-8 2019-05-26T00:14:16Z Understanding how salinity affects marine parasites is vital to understanding their ecology and treatment, particularly for host-parasite systems that traverse marine and freshwater realms such as the globally important Atlantic salmon (Salmo salar), salmon louse (Lepeophtheirus salmonis) system. Growing concerns for wild fish populations, and decreased efficiencies and burgeoning costs of lice treatments for farmed fish has necessitated more environmentally and socially acceptable delousing procedures, such as hyposaline treatments. The effect of brackish water on L. salmonis following primary attachment is largely unknown, with experimental evidence derived mostly from unattached or newly attached copepodids, or adult stages. We aimed to understand how attached lice respond to hyposaline environments to assess effectiveness as a parasite management strategy and to help better define delousing areas used by wild fish. Louse development at 4, 12, 19 and 26 ppt, and survival at 4 ppt, decreased as exposure times increased, but survival was otherwise unaffected. Subjecting salmon to fluctuating, repeat exposures did not influence efficacy. We confirm that free-swimming stages are susceptible, and show that attached copepodids were more tolerant than previously predicted based on experiments on alternate development stages. These results improve our understanding of the utility of hyposaline treatments in aquaculture and self-treating in wild fish, and could apply to other fish-lice parasite systems. Further, these data are important for models predicting host-parasite interactions and can contribute to predictive models on the transmission dynamics of sea lice from farm to wild fish. Text Atlantic salmon Salmo salar PubMed Central (PMC) Scientific Reports 9 1 |
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Article Sievers, Michael Oppedal, Frode Ditria, Ellen Wright, Daniel W. The effectiveness of hyposaline treatments against host-attached salmon lice |
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Article |
description |
Understanding how salinity affects marine parasites is vital to understanding their ecology and treatment, particularly for host-parasite systems that traverse marine and freshwater realms such as the globally important Atlantic salmon (Salmo salar), salmon louse (Lepeophtheirus salmonis) system. Growing concerns for wild fish populations, and decreased efficiencies and burgeoning costs of lice treatments for farmed fish has necessitated more environmentally and socially acceptable delousing procedures, such as hyposaline treatments. The effect of brackish water on L. salmonis following primary attachment is largely unknown, with experimental evidence derived mostly from unattached or newly attached copepodids, or adult stages. We aimed to understand how attached lice respond to hyposaline environments to assess effectiveness as a parasite management strategy and to help better define delousing areas used by wild fish. Louse development at 4, 12, 19 and 26 ppt, and survival at 4 ppt, decreased as exposure times increased, but survival was otherwise unaffected. Subjecting salmon to fluctuating, repeat exposures did not influence efficacy. We confirm that free-swimming stages are susceptible, and show that attached copepodids were more tolerant than previously predicted based on experiments on alternate development stages. These results improve our understanding of the utility of hyposaline treatments in aquaculture and self-treating in wild fish, and could apply to other fish-lice parasite systems. Further, these data are important for models predicting host-parasite interactions and can contribute to predictive models on the transmission dynamics of sea lice from farm to wild fish. |
format |
Text |
author |
Sievers, Michael Oppedal, Frode Ditria, Ellen Wright, Daniel W. |
author_facet |
Sievers, Michael Oppedal, Frode Ditria, Ellen Wright, Daniel W. |
author_sort |
Sievers, Michael |
title |
The effectiveness of hyposaline treatments against host-attached salmon lice |
title_short |
The effectiveness of hyposaline treatments against host-attached salmon lice |
title_full |
The effectiveness of hyposaline treatments against host-attached salmon lice |
title_fullStr |
The effectiveness of hyposaline treatments against host-attached salmon lice |
title_full_unstemmed |
The effectiveness of hyposaline treatments against host-attached salmon lice |
title_sort |
effectiveness of hyposaline treatments against host-attached salmon lice |
publisher |
Nature Publishing Group UK |
publishDate |
2019 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6502938/ http://www.ncbi.nlm.nih.gov/pubmed/31061506 https://doi.org/10.1038/s41598-019-43533-8 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6502938/ http://www.ncbi.nlm.nih.gov/pubmed/31061506 http://dx.doi.org/10.1038/s41598-019-43533-8 |
op_rights |
© The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41598-019-43533-8 |
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Scientific Reports |
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