Salmon-lice as a potential threat to anadromous Arctic charr populations
© 2023 The Authors. Journal of Fish Diseases published by John Wiley & Sons Ltd.
| Publié dans: | Journal of fish diseases. - 1998. - 46(2023), 5 vom: 25. Mai, Seite 465-475 |
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| Auteur principal: | |
| Autres auteurs: | , , , |
| Format: | Article en ligne |
| Langue: | English |
| Publié: |
2023
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| Accès à la collection: | Journal of fish diseases |
| Sujets: | Journal Article Salvelinus alpinus Lepeophtheirus sp post-smolt prevalence veteran migrants |
| Résumé: | © 2023 The Authors. Journal of Fish Diseases published by John Wiley & Sons Ltd. Salmon-lice have the potential to change the behaviour and growth of their salmonid host species. Here, the baseline infection levels of salmon-lice of post-smolts (n = 815) and veteran migrants (n = 875) of sea-run Arctic charr (Salvelinus alpinus Linnaeus, 1758) were monitored over two successive years in a sub-Arctic Norwegian fjord without farming of salmonids. All Arctic charr were collected after the sea-migration period from a trap placed in the river, ascending to their overwintering freshwater habitat (Lake Laksvatn). The sea-lice infection showed a stable infection across the 2 years while increasing through the migration period and with the size of the wild sea-run Arctic charr. The prevalence of sea-lice infection was intermediate to high, and the intensities of sea-lice infections observed were generally modest, although some individuals had high infections. The relatively high infection of salmon-lice highlights the potential detrimental effects these parasites can have at both the individual and population level of such endangered sub-Arctic life-history strategies. A comparative study should be performed in fjords with aquaculture activity as focal points for salmon-lice, to investigate the impact farming have on sea-run Arctic charr populations |
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| Description: | Date Completed 12.04.2023 Date Revised 12.04.2023 published: Print-Electronic Citation Status MEDLINE |
| ISSN: | 1365-2761 |
| DOI: | 10.1111/jfd.13758 |