Where art thou louse? A snapshot of attachment location preferences in salmon lice on Atlantic salmon hosts in sea cages
Abstract Problematic sea lice infestations on farmed Atlantic salmon ( Salmo salar ) have motivated extensive research and development into new methods to prevent, monitor and control sea lice. Most of these technologies require detailed information on the behaviour, spatial distribution and demogra...
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crwiley:10.1111/jfd.13167 2024-09-15T17:56:12+00:00 Where art thou louse? A snapshot of attachment location preferences in salmon lice on Atlantic salmon hosts in sea cages Bui, Samantha Oppedal, Frode Nola, Velimir Barrett, Luke T. 2020 http://dx.doi.org/10.1111/jfd.13167 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jfd.13167 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/jfd.13167 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Journal of Fish Diseases volume 43, issue 6, page 697-706 ISSN 0140-7775 1365-2761 journal-article 2020 crwiley https://doi.org/10.1111/jfd.13167 2024-08-22T04:18:18Z Abstract Problematic sea lice infestations on farmed Atlantic salmon ( Salmo salar ) have motivated extensive research and development into new methods to prevent, monitor and control sea lice. Most of these technologies require detailed information on the behaviour, spatial distribution and demography of lice on host fish. This study investigated how salmon lice ( Lepeophtheirus salmonis ) infestation density varies across the host's surface under sea cage farming conditions. Lice abundance, demography and attachment location were tracked over time, with repeated sampling of 300 individually tagged salmon across three replicate experimental sea cages. The data reveal clear differences in attachment locations according to sex and stage, but with an overall preference for the dorsal surface among mobile stages—dorsal head for adult females and dorsal‐posterior section for males and pre‐adults. Total lice abundance was highly variable between repeated measures of individual fish, consistent with frequent host‐switching or mortality. Total lice numbers also declined between sampling dates, likely due to handling, with lost mobile lice being almost exclusively adult males. As the distribution of sea lice on hosts is likely determined by numerous factors, future image‐based automated detection systems should be validated in settings that reflect the complex host–parasite interactions that occur in open farming systems. Article in Journal/Newspaper Atlantic salmon Salmo salar Wiley Online Library Journal of Fish Diseases 43 6 697 706 |
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description |
Abstract Problematic sea lice infestations on farmed Atlantic salmon ( Salmo salar ) have motivated extensive research and development into new methods to prevent, monitor and control sea lice. Most of these technologies require detailed information on the behaviour, spatial distribution and demography of lice on host fish. This study investigated how salmon lice ( Lepeophtheirus salmonis ) infestation density varies across the host's surface under sea cage farming conditions. Lice abundance, demography and attachment location were tracked over time, with repeated sampling of 300 individually tagged salmon across three replicate experimental sea cages. The data reveal clear differences in attachment locations according to sex and stage, but with an overall preference for the dorsal surface among mobile stages—dorsal head for adult females and dorsal‐posterior section for males and pre‐adults. Total lice abundance was highly variable between repeated measures of individual fish, consistent with frequent host‐switching or mortality. Total lice numbers also declined between sampling dates, likely due to handling, with lost mobile lice being almost exclusively adult males. As the distribution of sea lice on hosts is likely determined by numerous factors, future image‐based automated detection systems should be validated in settings that reflect the complex host–parasite interactions that occur in open farming systems. |
format |
Article in Journal/Newspaper |
author |
Bui, Samantha Oppedal, Frode Nola, Velimir Barrett, Luke T. |
spellingShingle |
Bui, Samantha Oppedal, Frode Nola, Velimir Barrett, Luke T. Where art thou louse? A snapshot of attachment location preferences in salmon lice on Atlantic salmon hosts in sea cages |
author_facet |
Bui, Samantha Oppedal, Frode Nola, Velimir Barrett, Luke T. |
author_sort |
Bui, Samantha |
title |
Where art thou louse? A snapshot of attachment location preferences in salmon lice on Atlantic salmon hosts in sea cages |
title_short |
Where art thou louse? A snapshot of attachment location preferences in salmon lice on Atlantic salmon hosts in sea cages |
title_full |
Where art thou louse? A snapshot of attachment location preferences in salmon lice on Atlantic salmon hosts in sea cages |
title_fullStr |
Where art thou louse? A snapshot of attachment location preferences in salmon lice on Atlantic salmon hosts in sea cages |
title_full_unstemmed |
Where art thou louse? A snapshot of attachment location preferences in salmon lice on Atlantic salmon hosts in sea cages |
title_sort |
where art thou louse? a snapshot of attachment location preferences in salmon lice on atlantic salmon hosts in sea cages |
publisher |
Wiley |
publishDate |
2020 |
url |
http://dx.doi.org/10.1111/jfd.13167 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jfd.13167 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/jfd.13167 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Journal of Fish Diseases volume 43, issue 6, page 697-706 ISSN 0140-7775 1365-2761 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1111/jfd.13167 |
container_title |
Journal of Fish Diseases |
container_volume |
43 |
container_issue |
6 |
container_start_page |
697 |
op_container_end_page |
706 |
_version_ |
1810432412740485120 |