Differences in risks and consequences of salmon louse, Lepeophtheirus salmonis (Krøyer), infestation on sympatric populations of Atlantic salmon, brown trout, and Arctic charr within northern fjords
Abstract Bjørn, P-A., Finstad, B., Kristoffersen, R., Rikardsen, A. H., and McKinley, R. S. 2007. Differences in risks and consequences of salmon louse, Lepeophtheirus salmonis (Krøyer), infestation on sympatric populations of Atlantic salmon, brown trout, and Arctic charr within northern fjords. –...
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Online Access: | http://dx.doi.org/10.1093/icesjms/fsl029 http://academic.oup.com/icesjms/article-pdf/64/2/386/29127035/fsl029.pdf |
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croxfordunivpr:10.1093/icesjms/fsl029 2023-12-31T10:02:22+01:00 Differences in risks and consequences of salmon louse, Lepeophtheirus salmonis (Krøyer), infestation on sympatric populations of Atlantic salmon, brown trout, and Arctic charr within northern fjords Bjørn, P. A. Finstad, B. Kristoffersen, R. McKinley, R. S. Rikardsen, A. H. 2006 http://dx.doi.org/10.1093/icesjms/fsl029 http://academic.oup.com/icesjms/article-pdf/64/2/386/29127035/fsl029.pdf en eng Oxford University Press (OUP) ICES Journal of Marine Science volume 64, issue 2, page 386-393 ISSN 1095-9289 1054-3139 Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2006 croxfordunivpr https://doi.org/10.1093/icesjms/fsl029 2023-12-06T08:44:21Z Abstract Bjørn, P-A., Finstad, B., Kristoffersen, R., Rikardsen, A. H., and McKinley, R. S. 2007. Differences in risks and consequences of salmon louse, Lepeophtheirus salmonis (Krøyer), infestation on sympatric populations of Atlantic salmon, brown trout, and Arctic charr within northern fjords. – ICES Journal of Marine Science, 64: 386–393. Differences in salmon louse (Lepeophtheirus salmonis) infestation on sympatric populations of fjord-migrating, Atlantic salmon post-smolts (Salmo salar), brown trout (Salmo trutta) (sea trout), and Arctic charr (Salvelinus alpinus) were studied in three fjords with fish-farming activity in northern Norway during the period June–August 2000. Atlantic salmon post-smolts were only captured in the fjords during late June and early July, and probably left them subsequently. No fish were infested with salmon lice. In contrast, brown trout and Arctic charr had similar infection patterns during their sampling periods, with very low prevalence and mean infection intensity during June (0–21% and 0–6 lice per fish, respectively), slightly increasing in July (8–70% and 6–12 lice per fish, respectively), and peaking in August (80–88% and 19–27 lice per fish, respectively). The chalimus stages dominated during June and July, with a few pre-adult and adult stages observed in July, and all stages were found frequently during August. The observations indicate that Atlantic salmon may have a mismatch between the time of louse infestation and their post-smolt fjord migration in northern fjords. In contrast, brown trout and Arctic charr feed within the fjords throughout summer and have a higher risk of harmful infestation in years with suitable environmental conditions for salmon louse development, especially in fish‐farming areas. Arctic charr usually spend the shortest time at sea of the three species, and the salmon lice may not have time to develop to the adult stage on this species. Article in Journal/Newspaper Arctic charr Arctic Atlantic salmon Northern Norway Salmo salar Salvelinus alpinus Oxford University Press (via Crossref) ICES Journal of Marine Science 64 2 386 393 |
institution |
Open Polar |
collection |
Oxford University Press (via Crossref) |
op_collection_id |
croxfordunivpr |
language |
English |
topic |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography Bjørn, P. A. Finstad, B. Kristoffersen, R. McKinley, R. S. Rikardsen, A. H. Differences in risks and consequences of salmon louse, Lepeophtheirus salmonis (Krøyer), infestation on sympatric populations of Atlantic salmon, brown trout, and Arctic charr within northern fjords |
topic_facet |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract Bjørn, P-A., Finstad, B., Kristoffersen, R., Rikardsen, A. H., and McKinley, R. S. 2007. Differences in risks and consequences of salmon louse, Lepeophtheirus salmonis (Krøyer), infestation on sympatric populations of Atlantic salmon, brown trout, and Arctic charr within northern fjords. – ICES Journal of Marine Science, 64: 386–393. Differences in salmon louse (Lepeophtheirus salmonis) infestation on sympatric populations of fjord-migrating, Atlantic salmon post-smolts (Salmo salar), brown trout (Salmo trutta) (sea trout), and Arctic charr (Salvelinus alpinus) were studied in three fjords with fish-farming activity in northern Norway during the period June–August 2000. Atlantic salmon post-smolts were only captured in the fjords during late June and early July, and probably left them subsequently. No fish were infested with salmon lice. In contrast, brown trout and Arctic charr had similar infection patterns during their sampling periods, with very low prevalence and mean infection intensity during June (0–21% and 0–6 lice per fish, respectively), slightly increasing in July (8–70% and 6–12 lice per fish, respectively), and peaking in August (80–88% and 19–27 lice per fish, respectively). The chalimus stages dominated during June and July, with a few pre-adult and adult stages observed in July, and all stages were found frequently during August. The observations indicate that Atlantic salmon may have a mismatch between the time of louse infestation and their post-smolt fjord migration in northern fjords. In contrast, brown trout and Arctic charr feed within the fjords throughout summer and have a higher risk of harmful infestation in years with suitable environmental conditions for salmon louse development, especially in fish‐farming areas. Arctic charr usually spend the shortest time at sea of the three species, and the salmon lice may not have time to develop to the adult stage on this species. |
format |
Article in Journal/Newspaper |
author |
Bjørn, P. A. Finstad, B. Kristoffersen, R. McKinley, R. S. Rikardsen, A. H. |
author_facet |
Bjørn, P. A. Finstad, B. Kristoffersen, R. McKinley, R. S. Rikardsen, A. H. |
author_sort |
Bjørn, P. A. |
title |
Differences in risks and consequences of salmon louse, Lepeophtheirus salmonis (Krøyer), infestation on sympatric populations of Atlantic salmon, brown trout, and Arctic charr within northern fjords |
title_short |
Differences in risks and consequences of salmon louse, Lepeophtheirus salmonis (Krøyer), infestation on sympatric populations of Atlantic salmon, brown trout, and Arctic charr within northern fjords |
title_full |
Differences in risks and consequences of salmon louse, Lepeophtheirus salmonis (Krøyer), infestation on sympatric populations of Atlantic salmon, brown trout, and Arctic charr within northern fjords |
title_fullStr |
Differences in risks and consequences of salmon louse, Lepeophtheirus salmonis (Krøyer), infestation on sympatric populations of Atlantic salmon, brown trout, and Arctic charr within northern fjords |
title_full_unstemmed |
Differences in risks and consequences of salmon louse, Lepeophtheirus salmonis (Krøyer), infestation on sympatric populations of Atlantic salmon, brown trout, and Arctic charr within northern fjords |
title_sort |
differences in risks and consequences of salmon louse, lepeophtheirus salmonis (krøyer), infestation on sympatric populations of atlantic salmon, brown trout, and arctic charr within northern fjords |
publisher |
Oxford University Press (OUP) |
publishDate |
2006 |
url |
http://dx.doi.org/10.1093/icesjms/fsl029 http://academic.oup.com/icesjms/article-pdf/64/2/386/29127035/fsl029.pdf |
genre |
Arctic charr Arctic Atlantic salmon Northern Norway Salmo salar Salvelinus alpinus |
genre_facet |
Arctic charr Arctic Atlantic salmon Northern Norway Salmo salar Salvelinus alpinus |
op_source |
ICES Journal of Marine Science volume 64, issue 2, page 386-393 ISSN 1095-9289 1054-3139 |
op_doi |
https://doi.org/10.1093/icesjms/fsl029 |
container_title |
ICES Journal of Marine Science |
container_volume |
64 |
container_issue |
2 |
container_start_page |
386 |
op_container_end_page |
393 |
_version_ |
1786810636847546368 |