Average female lice per fish

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Salmon Scotland mortality

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Cumulative mortality over full production cycle

Gravir Outer Production cycle end date: Mar 2018
Total losses: 47.6 %

Gravir Outer Production cycle end date: Feb 2020
Total losses: 8.5 %

Gravir Outer Production cycle end date: Apr 2022
Total losses: 42.3 %

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Inspection reports

Case Number: 2021-0200

Download Remote inspection conducted on 17th June by , shadowed by . Physical inspection conducted on 23rd June by
, shadowed by .
Site carried out Slice treatment during Sep, Oct & Nov 2020. Further Slice treatments carried out during Feb and April 2021.
All stocked pens went through a FW bath treatment from 1st to 6th June 2021.
Sea lice count carried out on site during inspection. Counts reflecting data being submitted weekly. A small number of lethargic fish spotted but only at 1 per pen. No morts noted. 2 pens had a high number of fish with physical damage from seal predation but also showing good recovery with open wounds being healed. 1 pen is fitted with Seal pro nets and showed far less physical damage from predation. Remaing pens to be kitted out with Seal Pro nets within the next month.
PD and PRV has been detected on site, but no increased mortalities as a result.
Cleaner fish mortality rates have been above expected since input, company not 100% sure of cause. No signs of concern noted during the inspection, therefore no diagnostics taken.
Fish sampled for VMD appeared in good condition externally and internally. [Original PDF]

Case Number: 2021-0556

Download Most recent treatment (non medicinal) was freshwater on 16/11/2021 for 6 hours. Site manager said that this has helped reduced AGD on site. Mortality has reduced below the reporting threshold for Wk47.
Targeted harvesting has occurred, where most affected pens were harvested out. Pens 1 and 2 were harvested out wk47 and pen 7 was harvested on 02/12/2021.
Site was struggling to treat the AGD as a result of unavailable well boats to do the treatment. When freshwater became available, the treatment was limited to 3 hours, where it should have been 6 hours. As a result, lice numbers increased and fish subjected to hydrolicer treatment. Reason for Wk45 5.68% mortality.
PGD still remaining on site and appetite is slowly increasing.
Cleanerfish (lumpfish and wrasse): none since wk32 as a result of being subjected to the AGD and lice treatments
Hole was discovered on 02/12/2021 above the water line and 12 inches big. 4 seals in pen 5.
PSI conducted by and supervised by on 03/12/2021. [Original PDF]

Case Number: 2023-0349

Download Site inspection stopped early due to an unsafe sea state, only 4 stocked pens inspected.
Site manager not present during the site inspection as he was on annual leave, the remaining paperwork was inspected remotely on 14/08/2023.
At the time of inspection, Gravir was stocked with 567,879 SAL at an average weight of 2.4kg in 12 120 meter pens. Visibility was poor on the date of inspection due to the rough sea state however clinical signs of disease were observed in some of the stocks visually inspected. Pens 1 - 4 were inspected due to mortality onsite at the time being predominant in these pens.
Approximately 10 fish were observed as being very lethargic / moribund in these pens. Most fish however were just out of reach to the hand net when attempts were made to capture due to the conditions on site at the time. Two fish from pen 1 and two fish from pen 2 were removed for diagnostic sampling. The stock were observed on camera back at the shorebase following the onsite inspection. Healthy shoaling populations of fish were observed in each pen.
The stock at Gravir were diagnosed with PD in early May of 2023 and have been recording mortality above the reporting threshold since 28/05/23. Mortality attributed to gill health has also occurred since 03/07/23 onsite, believed to be caused by an increase in jellyfish numbers in the area. Two recent reports detailing the results of health survailance on the stock have showen positive results for AGD and furunculosis, dated 25/07/2023 and 04/08/2023.
Most recent treatments were concluded on 07/07/23 and 28/07/23 which consisted of 6 hour freshwater bath treatments followed by FLS.
Freshwater and FLS treatments have been conducted regularly since December 2023 this production cycle at Gravir, initially the site was treating with freshwater using one hour bath treatments increasing to 3 hour bath treatments around March/April, and more recently to 6 hour bath treatments. The site has sustained a 100% mortality of its cleanerfish stock this production cycle. 353 wild caught ballan wrasse were input on 21/10/2022 and 70,932 Lump fish were input between 02/11/22 and
07/12/2022. From inspection of the cleanerfish mortality records, the last recorded mortality for wrasse onsite was in week 7 of
2023 and for lumpfish week 15 of 2023.
During the visit a member of site staff explained that the majority of the cleanerfish mortality was due to fish being lost during freshwater and FLS treatments. There was some doubt over whether the cleaner fish had been removed prior to these treatments. It was confirmed by the site manager during a remote inspection on 14/08/2023 that they had not been removed prior to treatment. From inspection of the Lumpfish mortality records, approximatly 22,000 fish had a recorded cause of mortalty from input untill week 15 of 2023 as AGD, the remaining stock was unaccounted for within the sites mortality records.
Site is stocked with fish from Geocrab, Applecross and Hebridean smolt.
Mortality removal onsite is usually carried out by whiteshore cockles, who remove whole fish waste from the site mort skip, positioned at the shore base. With the recent increase in mortality, excess mortalities have been removed and ensiled using the Bakkaness vessel.
REG inspection conducted as water temperature was over 14 degrees.
One issue was raised regarding the sites movement records : Movement of fish offsite to Portree (FS0708) in March 2023 was not recorded in the sites movement book. Issue raised with site manager and the record has since been updated. No further action required.
Case sheet and report ameneded on 25/01/2024. REG inspection not required as ECI is not due untill 2024. Case is a
REP/DIA. Report amended and re issued due to an error in case detail. [Original PDF]

Case Number: 2023-0463

Download Site inspected in order to conduct a further round of diagnostic sampling following increased, further mortality at the site since the date of last inspection, which was 31/07/2023.
Gravir has been harvesting the site out since the start of August this year, during the physical inspection of the site, only one pen remained stocked with 6,000 fish. Due to the size of the pens (120m) only a small number of fish were observed during the inspection, two fish were captured and removed for diagnostic sampling. Of the fish observed during the inspection, clinical signs of disease were observed. Fish appeared extremely lethargic and moribund, some fish presented with a loss of equilibrium in their swimming behaviour and other were observed as being anorexic.
Recent health checks conducted by the companies vet revealed positive results for furunculosis and AGD, which is consistent with the diagnostic findings achieved during the last FHI diagnostic.
No treatments have taken place since the last date of inspection. [Original PDF]

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