Average female lice per fish

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Salmon Scotland mortality

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Cumulative mortality over full production cycle

Production cycle end date: Apr 2018
Total losses: 10.7 %

Production cycle end date: Feb 2019
Total losses: 13.6 %

Production cycle end date: Oct 2019
Total losses: 4.4 %

Production cycle end date: Jun 2020
Total losses: 3.4 %

Production cycle end date: May 2021
Total losses: 16.6 %

Production cycle end date: May 2022
Total losses: 8.8 %

Production cycle end date: Jun 2023
Total losses: 37.1 %

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Inspection reports

Case Number: 2020-0512

Download Site records checked up until 20/11/2020 by on 20/11/2020
Site inspection and collection of movement records 24/11/20 -
Fish displayed good shoaling behaviour, they were deeper in the water, but visibility was excellent at time of inspection. No dead, moribund or lethargic fish observed. Fish sampled for VMD appeared healthy and in very good condition. MA never fully fallow, operator only stocks S0 inputs within MA.
Planning to expand site, moving from 12 x 90m circles to 12 x 120m circles, also plan to move the site further from shore.
No issues reported or observed on site at time of inspection
Site completed a FW treatment three weeks ago, slight AGD, but not causing any issues, FW was reported to be successful at reducing AGD levels. Treatment was conducted using the new Migdale wellboat, this removes the reliance on having a reservoir of FW as the wellboat can produce it's own. [Original PDF]

Case Number: 2022-0038

Download Fish came on from Lyrawa Bay (FS0054) and after slightly elevated mortality following transfer, the fish are reported to have performed very well on the site with low mortality levels since. AGD scores have also been very low.
Site has only used Tricaine for sealice counts since input. Site manager shared his observation that leps are becoming more prevalent in the water so a hydrolicer treatment has been scheduled for next month (March), alongside harvesting the site which is currently ongoing.
All harvests are deadhaul.
Majority of population appeared healthy and in good condition. A few individuals were noted across the site that displayed physical damage as a result from a hydrolicer treatment that was conducted at the end of 2021.
No moribund fish or mortalities were observed in any of the cages.
Fish sampled for VMD appeared healthy externally and internally and demonstrated a good feed response. [Original PDF]

Case Number: 2023-0359

Download IDN placed . Phonecall from business informing us of suspicion of the presence of BKD. FHI to visit 16/8/23. [Original PDF]

Case Number: 2023-0360

Download Salmon were moved from Fara West (FS1017) to Chalmers in Wk30. Mortality data is from input.
Salmon originated from Ardtaraig Hatchery (FS0648) and Yetts O' Muckart (FS0371) (mix of Stofinfisker and Aquagen). Yetts fish have been feeding and performing well. Few moribunds observed in the cages stocked with fish from Yetts (1-6). Cages stocked with fish from Ardtaraig (7-12) had high numbers of moribunds that were dark in colour, most exhibiting exopthalmia and some physical damage to flanks with visible haemorrhaging along the throat and ventrum. Fish were removed from these cages for diagnostic sampling.
Mortality events above reporting threshold:
Wks 48, 49, 51 and 52 2022 - all events attributed to poor gill health on site combined with environmental insult.
Wk4 2023 - also attributed to poor gill health and environmental insult.
Wks48 and 49 mortality events were not reported as required. Mortality notifications for these weeks were submitted retrospectively, NFA.
Last crop had a hydrolicer treatment in March/April 2022, followed by a thermolicer treatment in April 22. Current crop have only had a Salmosan treatment in July following transfer from Fara West and Tricaine for sea lice counts and sampling.
Last crop were dead haul, harvested out by 21st June 23. [Original PDF]

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