Follow-Up Study on Acoustic De-Licing of Atlantic Salmon (<i>Salmo salar</i>): <i>Lepeophtheirus salmonis</i> and <i>Caligus elongatus</i> Dynamics over Four Consecutive Production Cycles
Acoustic lice treatment (AcuLice) is a newly developed system which uses a composite acoustic sound image with low-frequency sound to remove salmon lice (<i>Lepeophtheirus salmonis</i>) from Atlantic salmon (<i>Salmo salar</i>). The effect of AcuLice treatment on salmon lice...
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MDPI AG
2025-01-01
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| Series: | Journal of Marine Science and Engineering |
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| author | Albert Kjartan Dagbjartarson Imsland Pablo Balseiro Sigurd Handeland Olav Rune Godø |
| author_facet | Albert Kjartan Dagbjartarson Imsland Pablo Balseiro Sigurd Handeland Olav Rune Godø |
| author_sort | Albert Kjartan Dagbjartarson Imsland |
| collection | DOAJ |
| description | Acoustic lice treatment (AcuLice) is a newly developed system which uses a composite acoustic sound image with low-frequency sound to remove salmon lice (<i>Lepeophtheirus salmonis</i>) from Atlantic salmon (<i>Salmo salar</i>). The effect of AcuLice treatment on salmon lice dynamics was measured by weekly salmon lice counting at a full-scale production facility from mid-summer 2019 to late-spring 2024. We monitored four production cycles, with AcuLice applied for two of the production cycles and with no AcuLice treatment applied during the other two production cycles as control. This is a follow-up study to our previous work. The numbers of salmon lice treatments and of weeks until the first salmon lice treatment were also compared in the two experimental groups. For the small (sessile and mobile stages) salmon lice, a significantly lower number (mean ± SEM) was shown for the AcuLice group (0.73 ± 0.03) compared with the control group (1.18 ± 0.05). For the mature female salmon lice, a significantly lower number (mean ± SEM) was found for the AcuLice group (0.12 ± 0.01) compared with the control group (0.22 ± 0.03). In addition, the mean (±SEM) number of <i>C. elongatus</i> varied between the two experimental groups and was higher in the control group (0.12 ± 0.01) compared with the AcuLice group (0.03 ± 0.01). In addition, a lower number (mean ± SEM) of salmon lice treatments (1.4 ± 0.17 vs. 4.22 ± 0.20) and a longer production period before the first salmon lice treatment occurred was observed for the AcuLice group (11.2 ± 0.1 weeks) compared with the control group (24.1 ± 2.3 weeks). These data suggest that the use of the AcuLice system significantly reduces the number of salmon lice (by 40–60%) and <i>C. elongatus</i> (by 70%) on farmed Atlantic salmon and reduces the need for traditional salmon lice treatments (by 65%). |
| format | Article |
| id | doaj-art-02c7ae2ed0f9462790b89341e7272329 |
| institution | Kabale University |
| issn | 2077-1312 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
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| series | Journal of Marine Science and Engineering |
| spelling | doaj-art-02c7ae2ed0f9462790b89341e72723292025-01-24T13:36:52ZengMDPI AGJournal of Marine Science and Engineering2077-13122025-01-0113110410.3390/jmse13010104Follow-Up Study on Acoustic De-Licing of Atlantic Salmon (<i>Salmo salar</i>): <i>Lepeophtheirus salmonis</i> and <i>Caligus elongatus</i> Dynamics over Four Consecutive Production CyclesAlbert Kjartan Dagbjartarson Imsland0Pablo Balseiro1Sigurd Handeland2Olav Rune Godø3Akvaplan-niva Iceland Office, Akralind 6, 201 Kópavogur, IcelandHigh Technology Centre, Department of Biological Sciences, University of Bergen, 5020 Bergen, NorwayHigh Technology Centre, Department of Biological Sciences, University of Bergen, 5020 Bergen, NorwayHusgod Holding AS, Skiparviklia 11, 5221 Nesttun, NorwayAcoustic lice treatment (AcuLice) is a newly developed system which uses a composite acoustic sound image with low-frequency sound to remove salmon lice (<i>Lepeophtheirus salmonis</i>) from Atlantic salmon (<i>Salmo salar</i>). The effect of AcuLice treatment on salmon lice dynamics was measured by weekly salmon lice counting at a full-scale production facility from mid-summer 2019 to late-spring 2024. We monitored four production cycles, with AcuLice applied for two of the production cycles and with no AcuLice treatment applied during the other two production cycles as control. This is a follow-up study to our previous work. The numbers of salmon lice treatments and of weeks until the first salmon lice treatment were also compared in the two experimental groups. For the small (sessile and mobile stages) salmon lice, a significantly lower number (mean ± SEM) was shown for the AcuLice group (0.73 ± 0.03) compared with the control group (1.18 ± 0.05). For the mature female salmon lice, a significantly lower number (mean ± SEM) was found for the AcuLice group (0.12 ± 0.01) compared with the control group (0.22 ± 0.03). In addition, the mean (±SEM) number of <i>C. elongatus</i> varied between the two experimental groups and was higher in the control group (0.12 ± 0.01) compared with the AcuLice group (0.03 ± 0.01). In addition, a lower number (mean ± SEM) of salmon lice treatments (1.4 ± 0.17 vs. 4.22 ± 0.20) and a longer production period before the first salmon lice treatment occurred was observed for the AcuLice group (11.2 ± 0.1 weeks) compared with the control group (24.1 ± 2.3 weeks). These data suggest that the use of the AcuLice system significantly reduces the number of salmon lice (by 40–60%) and <i>C. elongatus</i> (by 70%) on farmed Atlantic salmon and reduces the need for traditional salmon lice treatments (by 65%).https://www.mdpi.com/2077-1312/13/1/104Atlantic salmonacoustic de-licingsalmon licesustainable aquaculture |
| spellingShingle | Albert Kjartan Dagbjartarson Imsland Pablo Balseiro Sigurd Handeland Olav Rune Godø Follow-Up Study on Acoustic De-Licing of Atlantic Salmon (<i>Salmo salar</i>): <i>Lepeophtheirus salmonis</i> and <i>Caligus elongatus</i> Dynamics over Four Consecutive Production Cycles Journal of Marine Science and Engineering Atlantic salmon acoustic de-licing salmon lice sustainable aquaculture |
| title | Follow-Up Study on Acoustic De-Licing of Atlantic Salmon (<i>Salmo salar</i>): <i>Lepeophtheirus salmonis</i> and <i>Caligus elongatus</i> Dynamics over Four Consecutive Production Cycles |
| title_full | Follow-Up Study on Acoustic De-Licing of Atlantic Salmon (<i>Salmo salar</i>): <i>Lepeophtheirus salmonis</i> and <i>Caligus elongatus</i> Dynamics over Four Consecutive Production Cycles |
| title_fullStr | Follow-Up Study on Acoustic De-Licing of Atlantic Salmon (<i>Salmo salar</i>): <i>Lepeophtheirus salmonis</i> and <i>Caligus elongatus</i> Dynamics over Four Consecutive Production Cycles |
| title_full_unstemmed | Follow-Up Study on Acoustic De-Licing of Atlantic Salmon (<i>Salmo salar</i>): <i>Lepeophtheirus salmonis</i> and <i>Caligus elongatus</i> Dynamics over Four Consecutive Production Cycles |
| title_short | Follow-Up Study on Acoustic De-Licing of Atlantic Salmon (<i>Salmo salar</i>): <i>Lepeophtheirus salmonis</i> and <i>Caligus elongatus</i> Dynamics over Four Consecutive Production Cycles |
| title_sort | follow up study on acoustic de licing of atlantic salmon i salmo salar i i lepeophtheirus salmonis i and i caligus elongatus i dynamics over four consecutive production cycles |
| topic | Atlantic salmon acoustic de-licing salmon lice sustainable aquaculture |
| url | https://www.mdpi.com/2077-1312/13/1/104 |
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