Effects of laboratory salmon louse infection on mortality, growth, and sexual maturation in Atlantic salmon
Abstract Elevated salmon louse infection pressure generated by salmon farming represents a major threat for wild Atlantic salmon (Salmo salar). This study explored the effect of salmon lice on mortality, and body and gonad growth in F1 wild Atlantic salmon. Mature males (jacks) and immature fish wer...
Published in: | ICES Journal of Marine Science |
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2022
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Online Access: | http://dx.doi.org/10.1093/icesjms/fsac078 https://academic.oup.com/icesjms/article-pdf/79/5/1530/44278831/fsac078.pdf |
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croxfordunivpr:10.1093/icesjms/fsac078 2024-04-07T07:50:59+00:00 Effects of laboratory salmon louse infection on mortality, growth, and sexual maturation in Atlantic salmon Fjelldal, Per Gunnar Fraser, Thomas W K Hansen, Tom J Karlsen, Ørjan Bui, Samantha Pernet, Fabrice Institute of Marine Research 2022 http://dx.doi.org/10.1093/icesjms/fsac078 https://academic.oup.com/icesjms/article-pdf/79/5/1530/44278831/fsac078.pdf en eng Oxford University Press (OUP) https://creativecommons.org/licenses/by/4.0/ ICES Journal of Marine Science volume 79, issue 5, page 1530-1538 ISSN 1054-3139 1095-9289 Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2022 croxfordunivpr https://doi.org/10.1093/icesjms/fsac078 2024-03-08T03:03:30Z Abstract Elevated salmon louse infection pressure generated by salmon farming represents a major threat for wild Atlantic salmon (Salmo salar). This study explored the effect of salmon lice on mortality, and body and gonad growth in F1 wild Atlantic salmon. Mature males (jacks) and immature fish were either infected with two different louse infection intensities (LIIs, 0.08 or 0.35 lice g−1) or kept as uninfected controls. Fish maturation was thereafter environmentally stimulated in seawater, followed by transfer to freshwater for 38 d to simulate river ascendance. No females matured, while 99% of the initially immature males started puberty. Jacks had high, and immature and maturing fish low, seawater mortality, independent of lice. The parasites had an LII-dependent negative effect on growth in length, weight, and condition factor in seawater. In freshwater, after the lice had detached, fish that were previously infected in seawater had reduced growth in length but not weight when compared to the uninfected control. The parasites did not affect relative gonad size in any fish phenotypes. The present results show that Atlantic salmon has a complex, and unexplored, regulation of growth when recovering from lice infection under laboratory settings. Further, the results suggest that possible negative effects of salmon louse on reproductive success in Atlantic salmon is most likely governed by the reduced body size and condition. However, further work on possible effects of salmon louse on semen quality is encouraged. Article in Journal/Newspaper Atlantic salmon Salmo salar Oxford University Press ICES Journal of Marine Science 79 5 1530 1538 |
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Open Polar |
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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 Fjelldal, Per Gunnar Fraser, Thomas W K Hansen, Tom J Karlsen, Ørjan Bui, Samantha Effects of laboratory salmon louse infection on mortality, growth, and sexual maturation in Atlantic salmon |
topic_facet |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract Elevated salmon louse infection pressure generated by salmon farming represents a major threat for wild Atlantic salmon (Salmo salar). This study explored the effect of salmon lice on mortality, and body and gonad growth in F1 wild Atlantic salmon. Mature males (jacks) and immature fish were either infected with two different louse infection intensities (LIIs, 0.08 or 0.35 lice g−1) or kept as uninfected controls. Fish maturation was thereafter environmentally stimulated in seawater, followed by transfer to freshwater for 38 d to simulate river ascendance. No females matured, while 99% of the initially immature males started puberty. Jacks had high, and immature and maturing fish low, seawater mortality, independent of lice. The parasites had an LII-dependent negative effect on growth in length, weight, and condition factor in seawater. In freshwater, after the lice had detached, fish that were previously infected in seawater had reduced growth in length but not weight when compared to the uninfected control. The parasites did not affect relative gonad size in any fish phenotypes. The present results show that Atlantic salmon has a complex, and unexplored, regulation of growth when recovering from lice infection under laboratory settings. Further, the results suggest that possible negative effects of salmon louse on reproductive success in Atlantic salmon is most likely governed by the reduced body size and condition. However, further work on possible effects of salmon louse on semen quality is encouraged. |
author2 |
Pernet, Fabrice Institute of Marine Research |
format |
Article in Journal/Newspaper |
author |
Fjelldal, Per Gunnar Fraser, Thomas W K Hansen, Tom J Karlsen, Ørjan Bui, Samantha |
author_facet |
Fjelldal, Per Gunnar Fraser, Thomas W K Hansen, Tom J Karlsen, Ørjan Bui, Samantha |
author_sort |
Fjelldal, Per Gunnar |
title |
Effects of laboratory salmon louse infection on mortality, growth, and sexual maturation in Atlantic salmon |
title_short |
Effects of laboratory salmon louse infection on mortality, growth, and sexual maturation in Atlantic salmon |
title_full |
Effects of laboratory salmon louse infection on mortality, growth, and sexual maturation in Atlantic salmon |
title_fullStr |
Effects of laboratory salmon louse infection on mortality, growth, and sexual maturation in Atlantic salmon |
title_full_unstemmed |
Effects of laboratory salmon louse infection on mortality, growth, and sexual maturation in Atlantic salmon |
title_sort |
effects of laboratory salmon louse infection on mortality, growth, and sexual maturation in atlantic salmon |
publisher |
Oxford University Press (OUP) |
publishDate |
2022 |
url |
http://dx.doi.org/10.1093/icesjms/fsac078 https://academic.oup.com/icesjms/article-pdf/79/5/1530/44278831/fsac078.pdf |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
ICES Journal of Marine Science volume 79, issue 5, page 1530-1538 ISSN 1054-3139 1095-9289 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1093/icesjms/fsac078 |
container_title |
ICES Journal of Marine Science |
container_volume |
79 |
container_issue |
5 |
container_start_page |
1530 |
op_container_end_page |
1538 |
_version_ |
1795665808164126720 |