Context-dependent reduction in somatic condition of wild Atlantic salmon infested with sea lice
Funding: Marine Scotland Science (MSS). Wild Atlantic salmon Salmo salar stocks have globally declined over recent decades. On their migratory return to coastal waters, individuals typically are infested by ectoparasitic caligid sea lice (Lepeophtheirus salmonis Krøyer, Caligus elongatus Nordmann)....
Published in: | Marine Ecology Progress Series |
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Online Access: | http://hdl.handle.net/10023/18929 https://doi.org/10.3354/meps12746 |
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ftstandrewserep:oai:research-repository.st-andrews.ac.uk:10023/18929 2023-12-17T10:27:13+01:00 Context-dependent reduction in somatic condition of wild Atlantic salmon infested with sea lice Susdorf, Roman Salama, Nabeil Todd, Christopher David Hillman, Robert Elsmere, Paul Lusseau, David University of St Andrews. School of Biology University of St Andrews. Marine Alliance for Science & Technology Scotland University of St Andrews. Scottish Oceans Institute 2023-11-15 application/pdf http://hdl.handle.net/10023/18929 https://doi.org/10.3354/meps12746 eng eng Marine Ecology Progress Series Susdorf , R , Salama , N , Todd , C D , Hillman , R , Elsmere , P & Lusseau , D 2018 , ' Context-dependent reduction in somatic condition of wild Atlantic salmon infested with sea lice ' , Marine Ecology Progress Series , vol. 606 , pp. 91-104 . https://doi.org/10.3354/meps12746 0171-8630 PURE: 256866540 PURE UUID: ba657ca3-4698-4c13-b53f-040d83f1bb22 Scopus: 85056836860 ORCID: /0000-0002-9690-2839/work/60427272 WOS: 000450352900008 http://hdl.handle.net/10023/18929 https://doi.org/10.3354/meps12746 © 2018, Inter-Research and The Crown. This work has been made available online in accordance with the publisher's policies. This is the author created accepted version manuscript following peer review and as such may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.3354/meps12746 © 2018, Inter-Research and The Crown. This work has been made available online in accordance with the publisher's policies. This is the final published version of the work, which was originally published at https://doi.org/10.3354/meps12746 Atlantic salmon Salmo salar Condition effect Parasite-host interaction Sea lice Lepeophtheirus salmonis Caligus elongatus QH301 Biology SH Aquaculture. Fisheries. Angling NDAS SDG 14 - Life Below Water QH301 SH Journal article 2023 ftstandrewserep https://doi.org/10.3354/meps12746 2023-11-23T23:29:15Z Funding: Marine Scotland Science (MSS). Wild Atlantic salmon Salmo salar stocks have globally declined over recent decades. On their migratory return to coastal waters, individuals typically are infested by ectoparasitic caligid sea lice (Lepeophtheirus salmonis Krøyer, Caligus elongatus Nordmann). Infestation in laboratory trials can exert non-lethal impacts on the host fish, including increased stress levels and reduced growth, physical condition and swimming performance. However, to date no evidence exists for non-lethal effects of sea lice on wild adult Atlantic salmon. Using observations for > 6000 return-migrant adult salmon captured from the coastline at Strathy Point (SP), North Scotland, in the estuary of the River North Esk (NE), East Scotland, and the lower reach of the River Tamar (TA), Southwest England, we show that the somatic condition (weight at length) of wild salmon is associated with mobile sea lice density. This putative sea lice-mediated reduction of condition varied with year and seasonal date of freshwater return, and increased with the proportion of adult female parasites on a given fish. Influence of host sex, sea-age and smolt age was negligible. The estimated impact differed between the 3 sampling sites likely due to underestimation of infestation levels at NE and TA — largely attributable to negative influences of reduced salinity on parasite retention prior to sampling. Caligid infestation in the present samples explained a small, but discernible, proportion of the variation in host condition. Reductions in somatic condition of Atlantic salmon are associated with disproportionate declines in accreted lipid reserves, which are critical to up-river migration and ultimately the provisioning of eggs. Postprint Postprint Publisher PDF Peer reviewed Article in Journal/Newspaper Atlantic salmon Salmo salar University of St Andrews: Digital Research Repository Marine Ecology Progress Series 606 91 104 |
institution |
Open Polar |
collection |
University of St Andrews: Digital Research Repository |
op_collection_id |
ftstandrewserep |
language |
English |
topic |
Atlantic salmon Salmo salar Condition effect Parasite-host interaction Sea lice Lepeophtheirus salmonis Caligus elongatus QH301 Biology SH Aquaculture. Fisheries. Angling NDAS SDG 14 - Life Below Water QH301 SH |
spellingShingle |
Atlantic salmon Salmo salar Condition effect Parasite-host interaction Sea lice Lepeophtheirus salmonis Caligus elongatus QH301 Biology SH Aquaculture. Fisheries. Angling NDAS SDG 14 - Life Below Water QH301 SH Susdorf, Roman Salama, Nabeil Todd, Christopher David Hillman, Robert Elsmere, Paul Lusseau, David Context-dependent reduction in somatic condition of wild Atlantic salmon infested with sea lice |
topic_facet |
Atlantic salmon Salmo salar Condition effect Parasite-host interaction Sea lice Lepeophtheirus salmonis Caligus elongatus QH301 Biology SH Aquaculture. Fisheries. Angling NDAS SDG 14 - Life Below Water QH301 SH |
description |
Funding: Marine Scotland Science (MSS). Wild Atlantic salmon Salmo salar stocks have globally declined over recent decades. On their migratory return to coastal waters, individuals typically are infested by ectoparasitic caligid sea lice (Lepeophtheirus salmonis Krøyer, Caligus elongatus Nordmann). Infestation in laboratory trials can exert non-lethal impacts on the host fish, including increased stress levels and reduced growth, physical condition and swimming performance. However, to date no evidence exists for non-lethal effects of sea lice on wild adult Atlantic salmon. Using observations for > 6000 return-migrant adult salmon captured from the coastline at Strathy Point (SP), North Scotland, in the estuary of the River North Esk (NE), East Scotland, and the lower reach of the River Tamar (TA), Southwest England, we show that the somatic condition (weight at length) of wild salmon is associated with mobile sea lice density. This putative sea lice-mediated reduction of condition varied with year and seasonal date of freshwater return, and increased with the proportion of adult female parasites on a given fish. Influence of host sex, sea-age and smolt age was negligible. The estimated impact differed between the 3 sampling sites likely due to underestimation of infestation levels at NE and TA — largely attributable to negative influences of reduced salinity on parasite retention prior to sampling. Caligid infestation in the present samples explained a small, but discernible, proportion of the variation in host condition. Reductions in somatic condition of Atlantic salmon are associated with disproportionate declines in accreted lipid reserves, which are critical to up-river migration and ultimately the provisioning of eggs. Postprint Postprint Publisher PDF Peer reviewed |
author2 |
University of St Andrews. School of Biology University of St Andrews. Marine Alliance for Science & Technology Scotland University of St Andrews. Scottish Oceans Institute |
format |
Article in Journal/Newspaper |
author |
Susdorf, Roman Salama, Nabeil Todd, Christopher David Hillman, Robert Elsmere, Paul Lusseau, David |
author_facet |
Susdorf, Roman Salama, Nabeil Todd, Christopher David Hillman, Robert Elsmere, Paul Lusseau, David |
author_sort |
Susdorf, Roman |
title |
Context-dependent reduction in somatic condition of wild Atlantic salmon infested with sea lice |
title_short |
Context-dependent reduction in somatic condition of wild Atlantic salmon infested with sea lice |
title_full |
Context-dependent reduction in somatic condition of wild Atlantic salmon infested with sea lice |
title_fullStr |
Context-dependent reduction in somatic condition of wild Atlantic salmon infested with sea lice |
title_full_unstemmed |
Context-dependent reduction in somatic condition of wild Atlantic salmon infested with sea lice |
title_sort |
context-dependent reduction in somatic condition of wild atlantic salmon infested with sea lice |
publishDate |
2023 |
url |
http://hdl.handle.net/10023/18929 https://doi.org/10.3354/meps12746 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_relation |
Marine Ecology Progress Series Susdorf , R , Salama , N , Todd , C D , Hillman , R , Elsmere , P & Lusseau , D 2018 , ' Context-dependent reduction in somatic condition of wild Atlantic salmon infested with sea lice ' , Marine Ecology Progress Series , vol. 606 , pp. 91-104 . https://doi.org/10.3354/meps12746 0171-8630 PURE: 256866540 PURE UUID: ba657ca3-4698-4c13-b53f-040d83f1bb22 Scopus: 85056836860 ORCID: /0000-0002-9690-2839/work/60427272 WOS: 000450352900008 http://hdl.handle.net/10023/18929 https://doi.org/10.3354/meps12746 |
op_rights |
© 2018, Inter-Research and The Crown. This work has been made available online in accordance with the publisher's policies. This is the author created accepted version manuscript following peer review and as such may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.3354/meps12746 © 2018, Inter-Research and The Crown. This work has been made available online in accordance with the publisher's policies. This is the final published version of the work, which was originally published at https://doi.org/10.3354/meps12746 |
op_doi |
https://doi.org/10.3354/meps12746 |
container_title |
Marine Ecology Progress Series |
container_volume |
606 |
container_start_page |
91 |
op_container_end_page |
104 |
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1785579001451905024 |