Average female lice per fish

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Salmon Scotland mortality

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Cumulative mortality over full production cycle

Caolas a Deas East Production cycle end date: Jun 2018
Total losses: 1.1 %

Caolas a Deas West Production cycle end date: Jun 2018
Total losses: 2.4 %

Caolas a Deas West Production cycle end date: Apr 2020
Total losses: 28.1 %

Caolas a Deas East Production cycle end date: Apr 2020
Total losses: 31.4 %

Caolas a Deas East Production cycle end date: Dec 2021
Total losses: 11.3 %

Caolas a Deas West Production cycle end date: Mar 2022
Total losses: 24.4 %

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Inspection reports

Case Number: 2021-0309

Download Mortality last 4 weeks:
WRS 2021: wk 35, 601; wk34, 788; wk33, 114, wk32 no entry
LUM 2021: wk35, 66; wk34, 235; wk33, 785; wk32, 1670.
Increased Mortality in Cleanerfish:
LUM 2021: wk8, 6447 (freshwater); wk22, 8321; wk23, 7228; wk29, 5690; wk30, 11621 (extended freshwater) ;wk31, 10030
(extended freshwater)
Causes of mortality: sealice treatment (freshwater ), tenacibaculum
SAL: Pen 8- still experiencing pressure of yersiniosis, morts are reducing. Entire site still continuing Florfenicol treatment.
It has been accepted by industry that freshwater treatments will lead to elevated lumpfish mortalities. No alternative solution was given. Site manager said that it is difficult to dewater lumpfish as a result of size and shape. Staff try to remove fish as much as possible with hand nets. Increased handling may also contribute to mortalities.
Elevated lice on site: scheduled hydrolicer treatment.
Site inspection conducted on 15/09/2021 by and shadowed by .
VMD samples taken on 15/09/2021 by , observed by .
Remote paperwork conducted by , supervised by on 23/09/2021. [Original PDF]

Case Number: 2023-0475

Download Paperwork completed - 24/10/23. Site inspection and sampling conducted 25/10/23.
Site changed from 20 x 100m circles to 8 x 160m circles
Mortalities began to increase during end of August in to September and this was thought to corelate to drops in dissolved oxygen that the site experienced, when levels were at there lowest the site experience DO as low as 65% in August and dropping below 70% in September. The site had experienced some increase in jellyfish this summer, but not to levels that directly impacted the stock on site. The decision was made to reduce the biomass in the cages and move fish to other sea sites.
Mortalities in Pen 8 increased substantially between weeks 40 and 41, however, this was actually due to the fish in Pen 8 during WK 40 having lower level mortalities and appeared healthier being moved to Sconser Quarry on Skye. The stock in pen 8 during WK 41 was actually a split of fish from pen 1. Site keeps one of the pens fallow to allow treated fish to be returned to a different pen, due to each pen requiring 3 cycles through the wellboat to treat a whole cage.
Mortalities are currently being ensiled on site and also disposed of to White Shore Cockles.
Only medicinal treatments used this cycle so far is SLICE (January 2023, April 2023 and July 2023). A further SLICE treatment has been scheduled to being 31/10/23. Site has being using a wellboat with FW and FLS system for treatments.
Multiple infectious agents have been identified by QPCR, Piscirickettsia has been identified in QPCR samples
Sea lice levels have increased, with numbers for WK 42 2.72 adult female L. salmonis. This was reportedly partly due to disruption in FW treatments due to adverse weather. The FW treatments have recommenced on 24/10/23
LUM mortality- WK 39 - 1,660 (4.44%), WK 40 - 3,330 (9.24%), WK 41 - 3,850 (11.88%), WK42 - 3,185 (11.15%)
WRA mortality - WK39 - 2,239 (2.34%), WK 40 - 7,949 (8.5%), WK41 - 6,763 (7.63%), WK 42 - 8,558 (10.46%)
Site had two FW source inputs - Loch Garry (most of these have been moved to Sconser Quarry) and Glenfinnan
Ferguson transport vessel on site at time of inspection conducting mortality removal (uplift to basket and then transfer to storage tanks on vessel). Inter Atlantic also on site conducting FW/FLS treatment and splitting fish from Pen 7 to Pen 1.
Fish sampled from pen 7 for VMD appeared healthy. Approximately 30-40 moribund fish observed in Pen 8, 20-30 observed in Pen 4 and the remaining pens had <10 moribund visible at time of inspection. Good visibility in the cages at time of inspection
It was reported that the fish moved to Sconser Quarry have tested positive for Pasteurella skyensis, however, stock on Caolas
A Deas have continued to return negative results. [Original PDF]

Case Number: 2024-0025

Download Site inspected in overcast weather and high winds, sea state was choppy with poor visability.
4 moribund fish were observed across the site during the inspection, physical damage was observed on these fish, a likely result from recent crowding operations during harvest.
The site is nearing the end of its production cycle with a targetted fallow date in April 2024. Between weeks 37 and 46 of 2023 the site experianced a prologned period of increase mortality above 1% per week. This mortality was attributed to CGD combined with low oxygen and enviromental events. The health of the stock has improved onsite with December 2023 and
Januray 2024 sustaining much lower levels of site mortality. Mortality in week 3 2024 was elevated at 1.12% due to treatment loss following a thermolicer treatment.
The site last treated with freshwater, followed by FLS at the end of November 2023.
Mortalities are ensiled onsite, ensiled waste collected by whiteshore cockles.
Cleanerfish mortality - Lumpfish : Week 5 (346, 0.73%), Week 4 (235, 0.49%), Week 3 (251, 0.53%), Week 2 (485, 1%).
Wrasse : Week 5 (202, 0.42%), Week 4 (120, 0.24%), Week 3 (180, 0.36%), Week 2 ( 371, 0.73%) [Original PDF]

Case Number: 2024-0166

Download Informed by operators of presence of BKD, site visit arranged and IDN placed [Original PDF]

Case Number: 2024-0173

Download Fish input from Trilleachan Mor on 09/04/2024 (wk15). Site fallowed out previous crop on 04/04/2024. Risk assessment inspected 06/06/2024.
Stock Origin: pen 5, Lochailort, Fanad; rest of the pens, Inchmore, Aquagen
Harvests deadhaul and livehaul- to Blar Mhor.
Statutory inspection conducted following report from the business that clinical signs of Bacterial Kidney Disease (BKD) have been observed on 23/05/2024. The detailed sampling of fish by the business commenced on site following the observation of clinical signs at Seaforth (FS1042) and subsequent CDN placement. The stock origin of fish currently at Caolas a deas is noted as Trilleachan Mor (FS1118). Fish previously transferred to Trilleachan Mor originated from Seaforth (same batch of fish).
During the site inspection, all stocked pens were inspected and 5-10 lethargic fish were observed in the majority of the pens.
The majority of these fish were found to be deformed. From the ten fish that were removed, 4 were sampled following the observation of clinical sign relating on BKD.
The 4 fish sampled showed signs of swollen, grey, granular kidney, bloody ascites, swollen spleen with granules and yellow pseudofaeces.
Pen 5 on site was noted as the pen with increased mortality compared to the rest of the site; this is also the pen that originally during routine health surveillance from the business, clinical signs of BKD were observed.
On the day of inspection, pen 1 was receiving a passive grade/targeted harvest - permission to move dead fish off site was given by FHI on 27/05/2024.
Health team visit every 3 weeks.
A few wrasse were observed on site during site inspection. No records relating to cleanerfish because site did not think that there were cleanerfish on site. Site mentioned that cleanerfish may have been transferred from Trilleachan Mhor - ~5% remaining on site. [Original PDF]

Case Number: 2025-0006

Download Site fallow since 27/07/2024. Disinfection completed 28/12/2024.
Cages were lifted out of the water by crane, then scraped and power washed to remove all organic material then disinfected with Virkon Aquatic (1%). Nets sent to Vonin (Scalpay) for cleaning and disinfection. Top nets disinfected on site.
Polar circles, workboat, and barge scraped, power washed and disinfected. Net washer also disinfected.
All feed pipes have been flushed through and disinfected.
Mortality uplift system pipes replaced.
Cameras and feed spinners removed, cleaned and disinfected.
Mooring cans cleaned and disinfected.
All ropes and PPE replaced.
Cages and equipment inspected as clean. Disinfection records inspected as satisfactory.
Confirmed Designation Notice for BKD (CDN2024003) to be revoked. [Original PDF]

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