Behavioural responses of wild anadromous Arctic char experimentally infested in situ with salmon lice
Abstract 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...
Published in: | ICES Journal of Marine Science |
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Oxford University Press (OUP)
2022
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Online Access: | http://dx.doi.org/10.1093/icesjms/fsac117 https://academic.oup.com/icesjms/article-pdf/79/6/1853/45294423/fsac117.pdf |
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croxfordunivpr:10.1093/icesjms/fsac117 2024-04-07T07:49:23+00:00 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 Skjold, Bjørnar Bøhn, Thomas Pernet, Fabrice Institute of Marine Research 2022 http://dx.doi.org/10.1093/icesjms/fsac117 https://academic.oup.com/icesjms/article-pdf/79/6/1853/45294423/fsac117.pdf en eng Oxford University Press (OUP) https://creativecommons.org/licenses/by/4.0/ ICES Journal of Marine Science volume 79, issue 6, page 1853-1863 ISSN 1054-3139 1095-9289 Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2022 croxfordunivpr https://doi.org/10.1093/icesjms/fsac117 2024-03-08T03:01:09Z Abstract 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. Article in Journal/Newspaper Arctic Oxford University Press Arctic ICES Journal of Marine Science 79 6 1853 1863 |
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Open Polar |
collection |
Oxford University Press |
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croxfordunivpr |
language |
English |
topic |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
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Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography Strøm, John Fredrik Bjørn, Pål Arne Bygdnes, Eirik Emil Kristiansen, Lars Skjold, Bjørnar Bøhn, Thomas Behavioural responses of wild anadromous Arctic char experimentally infested in situ with salmon lice |
topic_facet |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract 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. |
author2 |
Pernet, Fabrice Institute of Marine Research |
format |
Article in Journal/Newspaper |
author |
Strøm, John Fredrik Bjørn, Pål Arne Bygdnes, Eirik Emil Kristiansen, Lars Skjold, Bjørnar Bøhn, Thomas |
author_facet |
Strøm, John Fredrik Bjørn, Pål Arne Bygdnes, Eirik Emil Kristiansen, Lars 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 |
publisher |
Oxford University Press (OUP) |
publishDate |
2022 |
url |
http://dx.doi.org/10.1093/icesjms/fsac117 https://academic.oup.com/icesjms/article-pdf/79/6/1853/45294423/fsac117.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
ICES Journal of Marine Science volume 79, issue 6, page 1853-1863 ISSN 1054-3139 1095-9289 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1093/icesjms/fsac117 |
container_title |
ICES Journal of Marine Science |
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79 |
container_issue |
6 |
container_start_page |
1853 |
op_container_end_page |
1863 |
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1795663600928423936 |