Impact of parasites on salmon recruitment in the Northeast Atlantic Ocean
Parasites may have large effects on host population dynamics, marine fisheries and conservation, but a clear elucidation of their impact is limited by a lack of ecosystem-scale experimental data. We conducted a meta-analysis of replicated manipulative field experiments concerning the influence of pa...
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ftpubmed:oai:pubmedcentral.nih.gov:3574446 2023-05-15T15:32:30+02:00 Impact of parasites on salmon recruitment in the Northeast Atlantic Ocean Krkošek, Martin Revie, Crawford W. Gargan, Patrick G. Skilbrei, Ove T. Finstad, Bengt Todd, Christopher D. 2013-01-07 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3574446 http://www.ncbi.nlm.nih.gov/pubmed/23135680 https://doi.org/10.1098/rspb.2012.2359 en eng The Royal Society http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3574446 http://www.ncbi.nlm.nih.gov/pubmed/23135680 http://dx.doi.org/10.1098/rspb.2012.2359 © 2012 The Author(s) Published by the Royal Society. All rights reserved. Research Articles Text 2013 ftpubmed https://doi.org/10.1098/rspb.2012.2359 2014-01-12T01:28:21Z Parasites may have large effects on host population dynamics, marine fisheries and conservation, but a clear elucidation of their impact is limited by a lack of ecosystem-scale experimental data. We conducted a meta-analysis of replicated manipulative field experiments concerning the influence of parasitism by crustaceans on the marine survival of Atlantic salmon (Salmo salar L.). The data include 24 trials in which tagged smolts (totalling 283 347 fish; 1996–2008) were released as paired control and parasiticide-treated groups into 10 areas of Ireland and Norway. All experimental fish were infection-free when released into freshwater, and a proportion of each group was recovered as adult recruits returning to coastal waters 1 or more years later. Treatment had a significant positive effect on survival to recruitment, with an overall effect size (odds ratio) of 1.29 that corresponds to an estimated loss of 39 per cent (95% CI: 18–55%) of adult salmon recruitment. The parasitic crustaceans were probably acquired during early marine migration in areas that host large aquaculture populations of domesticated salmon, which elevate local abundances of ectoparasitic copepods—particularly Lepeophtheirus salmonis. These results provide experimental evidence from a large marine ecosystem that parasites can have large impacts on fish recruitment, fisheries and conservation. Text Atlantic salmon Northeast Atlantic Salmo salar Copepods PubMed Central (PMC) Norway Proceedings of the Royal Society B: Biological Sciences 280 1750 20122359 |
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Research Articles Krkošek, Martin Revie, Crawford W. Gargan, Patrick G. Skilbrei, Ove T. Finstad, Bengt Todd, Christopher D. Impact of parasites on salmon recruitment in the Northeast Atlantic Ocean |
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Research Articles |
description |
Parasites may have large effects on host population dynamics, marine fisheries and conservation, but a clear elucidation of their impact is limited by a lack of ecosystem-scale experimental data. We conducted a meta-analysis of replicated manipulative field experiments concerning the influence of parasitism by crustaceans on the marine survival of Atlantic salmon (Salmo salar L.). The data include 24 trials in which tagged smolts (totalling 283 347 fish; 1996–2008) were released as paired control and parasiticide-treated groups into 10 areas of Ireland and Norway. All experimental fish were infection-free when released into freshwater, and a proportion of each group was recovered as adult recruits returning to coastal waters 1 or more years later. Treatment had a significant positive effect on survival to recruitment, with an overall effect size (odds ratio) of 1.29 that corresponds to an estimated loss of 39 per cent (95% CI: 18–55%) of adult salmon recruitment. The parasitic crustaceans were probably acquired during early marine migration in areas that host large aquaculture populations of domesticated salmon, which elevate local abundances of ectoparasitic copepods—particularly Lepeophtheirus salmonis. These results provide experimental evidence from a large marine ecosystem that parasites can have large impacts on fish recruitment, fisheries and conservation. |
format |
Text |
author |
Krkošek, Martin Revie, Crawford W. Gargan, Patrick G. Skilbrei, Ove T. Finstad, Bengt Todd, Christopher D. |
author_facet |
Krkošek, Martin Revie, Crawford W. Gargan, Patrick G. Skilbrei, Ove T. Finstad, Bengt Todd, Christopher D. |
author_sort |
Krkošek, Martin |
title |
Impact of parasites on salmon recruitment in the Northeast Atlantic Ocean |
title_short |
Impact of parasites on salmon recruitment in the Northeast Atlantic Ocean |
title_full |
Impact of parasites on salmon recruitment in the Northeast Atlantic Ocean |
title_fullStr |
Impact of parasites on salmon recruitment in the Northeast Atlantic Ocean |
title_full_unstemmed |
Impact of parasites on salmon recruitment in the Northeast Atlantic Ocean |
title_sort |
impact of parasites on salmon recruitment in the northeast atlantic ocean |
publisher |
The Royal Society |
publishDate |
2013 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3574446 http://www.ncbi.nlm.nih.gov/pubmed/23135680 https://doi.org/10.1098/rspb.2012.2359 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Atlantic salmon Northeast Atlantic Salmo salar Copepods |
genre_facet |
Atlantic salmon Northeast Atlantic Salmo salar Copepods |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3574446 http://www.ncbi.nlm.nih.gov/pubmed/23135680 http://dx.doi.org/10.1098/rspb.2012.2359 |
op_rights |
© 2012 The Author(s) Published by the Royal Society. All rights reserved. |
op_doi |
https://doi.org/10.1098/rspb.2012.2359 |
container_title |
Proceedings of the Royal Society B: Biological Sciences |
container_volume |
280 |
container_issue |
1750 |
container_start_page |
20122359 |
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1766362996150370304 |