Average female lice per fish

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Salmon Scotland mortality

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Cumulative mortality over full production cycle

Loch Alsh Production cycle end date: Aug 2018
Total losses: 39.2 %

Loch Alsh Production cycle end date: Jun 2020
Total losses: 21.4 %

Loch Alsh Production cycle end date: Jun 2022
Total losses: 22.1 %

Loch Alsh Production cycle end date: Nov 2022
Total losses: 19.9 %

Loch Alsh Production cycle end date: Jun 2024
Total losses: 65.6 %

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Inspection reports

Case Number: 2021-0482

Download Stocked and fish transferred from Ardintoul. Freshwater treated prior to being moved. Stock origin, Stofinfiskur from Loch Loch
Cleanerfish Mortality (recent Wrasse);
Wk44: 1.53%, 876
Wk43: 1.63%, 947
Wk42: 2.63%, 1569
Wk41: 1.08%, 648
Cleanerfish mortality (recent Lumpfish);
Wk44: 0.78%, 239
Wk43: 3.54%,1118
Wk42: 3.45%, 1128
Wk41: 2.41%,808
Lumpfish seem to be in better condition due to handfeeding which keeps the fish away from the nets. Mortalities have reduced as a result through the new cycle.
Other Mortality peaks: Wrasse-2021 Wk 40, 4.49%, 1574; Wk 39, 3.01%, 1088
SAL-2019 Wk47: hydrolicer, anaemia and moribund
SAL-2020 Wk24: clinical CMS
SAL-2020 Wk25: clinical CMS
Wrasse were found to be positive for furunculosis in Oct 2021. W/b 08/11/2021 the fish are being treated with florifenicol (in block form).
Inspection completed by , observed by . VMD sampled by , observed by . [Original PDF]

Case Number: 2023-0177

Download All fish from Lochailort
Morts get transported to Ardintoul to be ensiled and then moved on for biogas
Lumpfish mortality last 4 weeks: Wk 16 - 1.29% (1701 fish), Wk 17 - 1.11% (1434 fish), Wk 18 - 0.68% (876 fish), Wk 19 -
0.88% (1117 fish)
Increased SAL mortality Weeks 20 to 23 in 2022 - 1.11% (3232), 4.04% (9251), 7.23% (10086) and 3.47% (1028) as well as
Wks 43 to 46 - 3.55% (7876), 7.47% (16711), 5.11% (7613), 2.14% (567). All mortality due to jellyfish (gill issues).
VMD samples taken from pens 4, 7 and 10.
Recent health report - 13th April - nothing significant, rising mort numbers due to likely bacteria but TBC. 28th April from vet - nothing of significance, signs of septicaemia.
Rising caligus lice numbers have resulted in planned Alphamax treatment.
On inspection of the site a handful of morts were observed across the whole site. Fish were swimming further down in the water column and had a good feed response.
Site inspection, paperwork and VMD completed by , observed by 16/05/2023 [Original PDF]

Case Number: 2023-0497

Download Large number of mortalities observed floating on surface of a number of pens. Site is actively removing mortalities, normal practice for mortality removal is uplift to bins and the bins are transferred to Ardintoul, the site are using the Aqua Scotia for mortality removal at present (whole fish removed from pens and transferred to tanks at pier. Mowi have also used the
Bakkaness for mortality removal with fish removed by uplift and ensiled onboard.
It was reported that the site conducted a FW treatment in mid September and followed this up with a hydrogen peroxide treatment at the beginning of October (07/10 to 10/10), the mortalities began reportedly to increase following this treatment, with pens 3,4, 7 and 8 reported to be affected initially, before all pens on site being affected. Operator has been conducting their own sampling and these results have identified CGD, they have also had Pharmaq Analytiq on site recently and the results from that visit/sampling also identified CGD, but also noted "no history of exposure to harmful phytoplankton or zooplankton despite extensive monitoring"
Site manager reported that although site has CGD, there have been no environmental issues this year. Sea lice numbers on site are extremely low with wk 44 count being 0 adult female leps, 0.01 mobile leps and 0.01 chalimus . Site currently in withdrawal for hydrogen peroxide (500 degree days) due to treatment being for gills rather than sea lice.
WRA mortality - WK42 - 1,741 (3.39%), WK 41 - 2,762 (5.11%), wk 40 - 1,830 (3.94%) and wk 39 - 1,306 (2.93%)
LUM mortality - wk 42 - 2,112 (7.13%), wk 41 - 5,793 (16.36%), wk 40 - 7,902 (18.24%) and wk 39 - 5,628% (11.50%)
Site currently conducting FW treatments using the Inter Atlantic and plan to treat the whole site by 10/11/23 (weather dependant)
Weather was very changeable during the site inspection. Fish sampled for VMD appeared healthy. [Original PDF]

Case Number: 2025-0125

Download Risk assessments available for SW to SW movements - found to be satisfactory.
Elevated Lumpsucker mortalities - 2023 wk26 27184 (19.08%) wk27 13175 (11.43%), wk28 6919 (6.77%) wk37 11655
(16.33%), wk38 10787 (18.06%), wk40 7902 (18.24%), wk41 5793 (16.36%). 2024 wk11 5725 (10.12%). - The salmon had
FW treatments, during this time the site had difficulties separating the lump suckers during treatments. Following this site had dewaterers placed on boats to help. In addition, site now removes all cleaner fish prior treatments which are stored in a floating pen and kept with in the cage).
Wrasse were onsite on the previous cycle but were not at time of inspection. Records were checked for wrasse that were present in previous cycle.
Stock were observed to be shoaling and feeding well whilst swimming deep in the water column. Fish had a good feed and stimuli response. Stock that had originated from Lochailort were observed to have caudal fin damage but appeared to be healing well. Few spinal deformities were observed across site. 3 mortalities were observed across site and were removed at time of inspection. At time of inspection site were conducting Sea lice counts, which were observed - counts that were conducted were reflective of records. In addition, fish appeared to be in good condition.
3 fish were collected for VMD. The fish were observed to be in good condition externally and internally.
Site records and stock were inspected by whilst supervised by . VMD was sampled by whilst supervised by
. [Original PDF]

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