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: Sep 2018
Total losses: 16.9 %

Production cycle end date: Aug 2020
Total losses: 19.3 %

Production cycle end date: Dec 2022
Total losses: 8.5 %

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Inspection reports

Case Number: 2021-0274

Download Fish came onto site from Loch Arkaig (FS0649) on the 11th and 13th of May 21.
Fungal infection present in salmon in pens 6, 8 and 11 following transfer from FW. Site experienced post-transfer mortality, but this reduced in the following weeks. Total mortality across the site since input was 2%.
Lumpfish came onto site in May from Ocean Matters and were stocked at 8%. Site suffered elevated lumpfish mortalties following transfer, which has been attributed to a Flavivirus infection that was transferred from the supplier. Total mortality since input was 37% (27,000). Site staff increased mortality removal, net cleaning and they were hand feeding the lumpfish to promote recovery. Mortality has since reduced.
Wrasse on site were wildcaught in the waters around Skye and Weymouth. Wrasse are being transferred to the site as and when they are available from the supplier. Stocking began 2 weeks ago and the site manager stated that the site will continue to receive wrasse until they reach a stocking density of 2%. Wrasse mortality since input is 1%.
Average Lep numbers have remained <2 since input, however average Caligus numbers began increasing towards the end of
June (>6). The site received a FW treatment and the average number dropped to <2. Caligus numbers have started to increase again in the last few weeks and so an Alphamax treatment has been scheduled for 22/07 to address this.
Fish were sitting deep in the water so difficult to observe, although appeared to be shoaling well. 6 salmon mortalities and 12 wrasse mortalities were observed across the site during the inspection. These were not fresh dead and so no diagnostic samples were taken.
Some lumpfish were observed near the top of the nets, these appeared to be in good health and were active.
Fish sampled for VMD appeared healthy. [Original PDF]

Case Number: 2023-0291

Download Information received via email from a 3rd party for a positive test for BKD
IDN issued (IDN2023001). Inspection organised for 05/07/2023 and 06/07/2023, case number 20230292 [Original PDF]

Case Number: 2023-0292

Download Records checked on 05/07/2023 (2 hours on site) while physical inspection of stock was carried out 06/07/2023 (5 hours on site).
Routine inspection brought forward after site reported after one fish (Atlantic salmon) sampled during monthly health check came back positive for BKD through histology and preliminary PCR test. Inspector was informed by a member of the health team that the fish that had been sampled for pre-transfer screen were mort's so may have been dead for a day or two prior to sampling. Site has not seen any increase in mortality numbers with mortality levels over the last 4 weeks being between 0.08% to 0.15% per week across the whole site and no pens showing increased mortalities in comparison to other pens. Main cause of current mortalities has been via runts and gill issues via increased numbers of micro jellyfish on site. Visibility was not good due to run off from recent heavy rain but fish could be seen responding well to feed and shoaling as expected. A large number of mackerel were observed outside the pens.
On average 3 moribund fish were removed per pen but no darkening of the skin, distended abdomens, blisters or haemorrhaging around the vent were observed. All fish removed were poor doers and from marks on the heads had suffered from concussion. Internal examination of all fish was also carried out with no gross pathology observed. The 8 healthy fish removed for vmd sampling were also examined and again showed no signs of disease. By the time of arrival on site the company had already arranged for an ensiler at the shore base and a net cleaner to only be used at the site inspected.
Cleaner fish mort's. from 05/06/23 - 05/07/2023 - Lumpfish 4676 (4.53%), wrasse 1327 (7.8%). The mortality numbers over this time period has been consistent over all 12 pens showing no trends or peaks noted. Only mort's from inspected site are processed at the shore base.
No treatments carried out on current cycle so far. TMS used on site weekly but just for carrying out sea lice counts. Only treatments during the previous cycle were physical sea lice treatments.
Cleanerfish movements have been kept separately but are available and satisfactory. In future all movements (salmon and cleanerfish) will be kept in the same movement record book. [Original PDF]

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