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Average female lice per fish

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Salmon Scotland mortality

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Cumulative mortality over full production cycle

Badcall Production cycle end date: Mar 2018
Total losses: 17.8 %

Badcall Production cycle end date: Aug 2018
Total losses: 20.6 %

Badcall Production cycle end date: Apr 2020
Total losses: 18.2 %

Badcall Production cycle end date: Apr 2022
Total losses: 8.8 %

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Inspection reports

Case Number: 2021-0568

Download Fish came on from Clachbreac and Loch Gairloch.
Fish were FW treated during transfer and also received FW treatments in August, September and the most recent one on
24/11/2021. Paramove was used in August 21 but lice numbers have remained <2 throughout the cycle.
Wrasse mortality since input is 1,500 (~1%).
Fish appeared in good body condition with the exception of some individuals displaying seal damage. Two wrasse mortalities and one salmon mortality observed across the site.
Fish carcass was discovered on site, outwith the net of cage 5. Suspected seal predation. Dive reports inspected from the previous day (7/12) and noted that a hole was discovered in the net of cage 7 measuring 8 mesh across. The hole was stitched immediately and an initial escape notification was received by the business on 08/12 - no fish are expected to have escaped. The nets on site are HDPE and are tensioned. Top nets are also deployed on all the cages. Site no longer uses
ADDs and no longer has a MML. Business is considering moving to predator nets beginning of next year. Divers were on site on the day of inspection, dive report was requested from the business - no further holes were discovered in any of the nets.
Site was inspected as satisfactory with regards to containment on the day of inspection.
Fish sampled for VMD appeared healthy and displayed a good feed response. [Original PDF]

Case Number: 2024-0006

Download Paperwork completed remotely on 25/01/2024 by , observing. Physical inspection lead by on 07/02/2024, observed by .
Site details mention that there are three cages groups but there are now only 2. Check planning amendment in 2021 to find out grid references. One cage group in operation
is new manager. Manager for both Badcall Bay and Calva Bay
SAL GRO and WRS normally held
12 24x24 steel cages on site at the time of the inspection
No longer a fax machine on site. Number should be removed from site details
Transferred fish from Calva Bay in May 2023
Mostly wild origin wrasse on site caught off coast of Skye, Sutherland and Cornwall. Some WRS from Otter Ferry
Shared waste disposal skip located at shorebase for all mortality in area.
Optomease used to anaesthetize closer to harvest time. Harvesting at the time of the inspection
ADDs on site licensed by NatureScot as they company hold a research license. The license allows the company to use an
ADD to deter cetaceans in exchange for information.
Freshwater treatments were undertaken at end of summer-early autumn 2023. They were done to target gill health issues not lice
Approximately 2 fish observed with signs of predator attack
Calibrated site thermometer used to take temperature. Due to sub-zero temperature, temperature was not displayed on inspectors field thermometer. FHI 045 Thermometer fail sheet completed. [Original PDF]

Case Number: 2025-0402

Download Input Oct/Nov 2024 - Orsmary (FS0575).
Freshwater/FLS treatments week 33. Cleanerfish stocking in week 36. More planned. Salmosan treatment week 42.
Recent mortalities:
SAL Week 42: 1.35%; Week 41: 1.99%; Week 40: 1.35%; Week 39: 1.34%
WRA Week 42: 0.03%; Week 41: 0.23%; Week 40: 0.46%; Week 39: 0.01%
AGD became prevalent on the Badcall site in week 16 2025. Freshwater treatments for gills using Loch Duart Plc’s pump barge and tarp system were implemented. In weeks 21 & 22, pre adults were increasing on the Badcall site but adult females were not increasing. On this basis, a Salmosan treatment was delivered during a planned thinning operation that moved fish from Badcall to stock Calva Bay (FS0068). This was effective at maintaining low levels of adult females until week 30 when lice numbers began to rise. In week 29 – 30 a FW treatment was administered to manage the AGD. This however had minimal impact on the rising lice numbers. In week 33 a further FW treatment was administered: the Kvaloy however could only treat for
3.5 hours with the use of FLS on discharge. Clearance of leps during this treatment was less than expected due to the short time they were exposed to FW. Due to the level of clearance achieved and steadily rising lice numbers after the Kvaloy wellboat treatment in week 33, it was then decided that cleaner fish must be reintroduced to help manage the increasing adult lice number at the site (At the start of 2025 it was decided that cleaner fish would not be stocked on sites with active AGD management plans as these involved regular FW treatments. It was considered that the FLS system would be sufficient to provide lice clearance if required due to the low lice levels at the time). Cleanerifsh were stocked in week 36 and given 2 weeks of settling time. However by then the cleaner fish were possibly overwhelmed by the lice levels (adult females/fish were above 10 by week 38). A Salmosan treatment was scheduled but the start date was frequently deferred: the vessel was due at Badcall on the 03/10/25 but got pushed back due to mechanical repairs. Then the onset of Storm Amy at the start of October (4/10/25 onwards) and the latent weather of the following week added additional delays to the treatment starting. Treatments however were begun on the 16/10/25 and are currently ongoing.
Ongoing strategy for the prevention, control and reduction of lice:Salmosan, freshwater and FLS treatments will be ongoing to establish and maintain control over lice numbers on site. The Kvaloy is now chartered full time to Loch Duart Plc and an adjustable grader is to be fitted to facilitate the easier removal of cleaner fish from pens (so cleaner fish and FW treatments can be used simultaneously). Currently only fish above an average size of 2.8kg can be removed. The Aqua Viking will also be available full time for treatments from the 28/10/25. Tarp treatments will also be available but as a last resort dependent on weather and tidal conditions. Cleaner fish stocking is currently at 3% at the site and this will continue. An additional holding pen for cleaner fish top ups has also been established and will be available once freshwater treatments are completed at the site.
Increased mortality levels due to gill health (CGD). Five moribund fish were removed for diagnostic sampling. All had high lice loads and evidence of sea lice damage to the head. Fish also had evidence of poor gill health. Internally all had pale livers and yellow pseudofaeces, with little evidence of feeding in the stomach. The fish sampled for VMD appeared healthy both externally and internally.
The main population appeared to be in good condition, shoaling deep in the water column and with a good feeding response. However, approximately 20-30 lethargic fish per pen were observed with lice damage to the head area, some severe. These fish appeared to be mostly runts. The fish removed for sea lice counts also had evidence of skin damage to the head and skin abrasions on the flanks/caudal area. Some evidence of treatment clearance observed. [Original PDF]

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