Behavioural responses of wild anadromous Arctic char experimentally infested in situ with salmon lice
Salmon lice can impact the marine behaviour, growth, and survival of salmonids, but little is known about their effects on Arctic char. We present behavioural responses from the first dose-response experiment with wild anadromous Arctic char (n = 50) infested in situ with salmon lice (0.0–1.2 lice g...
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Online Access: | https://hdl.handle.net/11250/3057243 https://doi.org/10.1093/icesjms/fsac117 |
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ftimr:oai:imr.brage.unit.no:11250/3057243 2023-05-15T14:42:01+02:00 Behavioural responses of wild anadromous Arctic char experimentally infested in situ with salmon lice Strøm, John Fredrik Bjørn, Pål Arne Bygdnes, Eirik Emil Kristiansen, Lars Amundsen Skjold, Bjørnar Bøhn, Thomas 2022 application/pdf https://hdl.handle.net/11250/3057243 https://doi.org/10.1093/icesjms/fsac117 eng eng Havforskningsinstituttet: 15696 ICES Journal of Marine Science. 2022, 79 (6), 1853-1863. urn:issn:1054-3139 https://hdl.handle.net/11250/3057243 https://doi.org/10.1093/icesjms/fsac117 cristin:2094372 1853-1863 79 ICES Journal of Marine Science 6 Peer reviewed Journal article 2022 ftimr https://doi.org/10.1093/icesjms/fsac117 2023-03-15T23:44:41Z Salmon lice can impact the marine behaviour, growth, and survival of salmonids, but little is known about their effects on Arctic char. We present behavioural responses from the first dose-response experiment with wild anadromous Arctic char (n = 50) infested in situ with salmon lice (0.0–1.2 lice g−1 fish) in an area with low natural infestations. Infested fish spent less time at sea (mean ± SD = 22 ± 6 d) than non-infested fish (mean ±SD = 33 ± 5 d), and a significant dose response was evident, with even very low louse burdens (<0.05 lice g−1 fish) reducing the marine feeding time. Furthermore, a negative correlation was present between time spent close to their native watercourse and parasite burden, suggesting that salmon lice influence the marine habitat use of Arctic char. No impact of salmon lice was evident on the return probability, i.e. marine survival. However, the presence of louse-induced mortality cannot be excluded as the modest sample size was only sufficient to detect extreme effects. Reduced marine feeding time and altered marine habitat use will likely have substantial negative effects on growth and fitness, suggesting that impacts of salmon lice must be considered in the conservation of anadromous Arctic char. acceptedVersion publishedVersion Article in Journal/Newspaper Arctic Institute for Marine Research: Brage IMR Arctic ICES Journal of Marine Science 79 6 1853 1863 |
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Open Polar |
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Institute for Marine Research: Brage IMR |
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ftimr |
language |
English |
description |
Salmon lice can impact the marine behaviour, growth, and survival of salmonids, but little is known about their effects on Arctic char. We present behavioural responses from the first dose-response experiment with wild anadromous Arctic char (n = 50) infested in situ with salmon lice (0.0–1.2 lice g−1 fish) in an area with low natural infestations. Infested fish spent less time at sea (mean ± SD = 22 ± 6 d) than non-infested fish (mean ±SD = 33 ± 5 d), and a significant dose response was evident, with even very low louse burdens (<0.05 lice g−1 fish) reducing the marine feeding time. Furthermore, a negative correlation was present between time spent close to their native watercourse and parasite burden, suggesting that salmon lice influence the marine habitat use of Arctic char. No impact of salmon lice was evident on the return probability, i.e. marine survival. However, the presence of louse-induced mortality cannot be excluded as the modest sample size was only sufficient to detect extreme effects. Reduced marine feeding time and altered marine habitat use will likely have substantial negative effects on growth and fitness, suggesting that impacts of salmon lice must be considered in the conservation of anadromous Arctic char. acceptedVersion publishedVersion |
format |
Article in Journal/Newspaper |
author |
Strøm, John Fredrik Bjørn, Pål Arne Bygdnes, Eirik Emil Kristiansen, Lars Amundsen Skjold, Bjørnar Bøhn, Thomas |
spellingShingle |
Strøm, John Fredrik Bjørn, Pål Arne Bygdnes, Eirik Emil Kristiansen, Lars Amundsen Skjold, Bjørnar Bøhn, Thomas Behavioural responses of wild anadromous Arctic char experimentally infested in situ with salmon lice |
author_facet |
Strøm, John Fredrik Bjørn, Pål Arne Bygdnes, Eirik Emil Kristiansen, Lars Amundsen Skjold, Bjørnar Bøhn, Thomas |
author_sort |
Strøm, John Fredrik |
title |
Behavioural responses of wild anadromous Arctic char experimentally infested in situ with salmon lice |
title_short |
Behavioural responses of wild anadromous Arctic char experimentally infested in situ with salmon lice |
title_full |
Behavioural responses of wild anadromous Arctic char experimentally infested in situ with salmon lice |
title_fullStr |
Behavioural responses of wild anadromous Arctic char experimentally infested in situ with salmon lice |
title_full_unstemmed |
Behavioural responses of wild anadromous Arctic char experimentally infested in situ with salmon lice |
title_sort |
behavioural responses of wild anadromous arctic char experimentally infested in situ with salmon lice |
publishDate |
2022 |
url |
https://hdl.handle.net/11250/3057243 https://doi.org/10.1093/icesjms/fsac117 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
1853-1863 79 ICES Journal of Marine Science 6 |
op_relation |
Havforskningsinstituttet: 15696 ICES Journal of Marine Science. 2022, 79 (6), 1853-1863. urn:issn:1054-3139 https://hdl.handle.net/11250/3057243 https://doi.org/10.1093/icesjms/fsac117 cristin:2094372 |
op_doi |
https://doi.org/10.1093/icesjms/fsac117 |
container_title |
ICES Journal of Marine Science |
container_volume |
79 |
container_issue |
6 |
container_start_page |
1853 |
op_container_end_page |
1863 |
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1766313690351534080 |