Site Details: Gravir

Gravir
South Lochs
HS2 9QX
Operator: Bakkafrost Scotland
Water type: Seawater

Average female lice per fish

Source

Salmon Scotland mortality

Source

Cumulative mortality over full production cycle

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

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

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

Source

Fish Health Inspectorate mortality

Date:
03/01/22-09/01/22
Mortality:
6,453
Mortality Rate:
1.68%
Reason given: Gill Health Related
Gill Health Related
Harvests ongoing; FW treatment planned week 3 subject to weather
Harvesting of worst affected pens ongoing, fresh water treatment to be carried out this week, weather depending. Mortality percentage has reduced this week. FHI to monitor.

Date:
10/01/22-16/01/22
Mortality:
9,910
Mortality Rate:
2.72%
Reason given: Gill Health Related
Gill Health Related
Harvesting of worst affected pens ongoing, fresh water treatment to be carried out week 3 or 4, weather depending. FHI to monitor.

Date:
17/01/22-23/01/22
Mortality:
9,686
Mortality Rate:
2.73%
Reason given: Gill Health Related
Gill Health Related
Freshwater treatment week wk4
Freshwater treatment was conducted in wk3. FHI to monitor.

Date:
24/01/22-31/01/22
Mortality:
7,212
Mortality Rate:
2.41%
Reason given: Gill Health Related
Gill Health Related
Freshwater treatment wk4
Gill health has been problematic since September 2021. Mortalities have reduced from previous week, FHI to monitor.

Date:
31/01/22-06/02/22
Mortality:
6,737
Mortality Rate:
2.50%
Reason given: Gill Health Related, Viral Diseases
Gill Health Related, Viral Diseases
Gill health has been problematic since September 2021. Mortalities have reduced from previous week, FHI to monitor.

Date:
07/02/22-13/02/22
Mortality:
4,919
Mortality Rate:
2.32%
Reason given: Gill Health Related, Viral Diseases
Gill Health Related, Viral Diseases
Contacted business correspondant. The site is positive for CMS with underlying PGD. FW tretament has been delayed due to weather. Harvest currently ongoing, only 4 pens left. FHI to monitor.

Date:
14/02/22-21/02/22
Mortality:
3,075
Mortality Rate:
2.23%
Reason given: Gill Health Related, Viral Diseases
Gill Health Related, Viral Diseases
Contacted business correspondant. The site is positive for CMS with underlying PGD. FW tretament has been delayed due to weather. Harvest currently ongoing, only 4 pens left. FHI to monitor.

Date:
28/02/22-06/03/22
Mortality:
2,430
Mortality Rate:
2.12%
Reason given: Viral Disease
Viral Disease
CMS confirmed on site. Only 4 pens left on site. Harvesting has been ongoing. FHI to monitor

Date:
22/05/23-28/05/23
Mortality:
10,297
Mortality Rate:
1.33%
Reason given: Viral Disease (PD); Environmental
Viral Disease (PD); Environmental
Monitor - minimise stress and manage feeding around blooms
First notification received this cycle, FHI to monitor.

Date:
29/05/23-04/06/23
Mortality:
12,257
Mortality Rate:
1.60%
Reason given: Viral Disease (PD); Environmental
Viral Disease (PD); Environmental
Monitor - minimise stress and manage feeding around blooms
Contacted for further information regarding environmental issues.

Date:
05/06/23-11/06/23
Mortality:
13,085
Mortality Rate:
1.74%
Reason given: Viral Disease (PD); Environmental
Viral Disease (PD); Environmental
Monitor - minimise stress and manage feeding around blooms. Jellyfish causing gill issues but have now cleared. Species not identified.
FHI to monitor.

Date:
12/06/23-18/06/23
Mortality:
9,295
Mortality Rate:
1.26%
Reason given: Viral Disease (PD)
Viral Disease (PD)
Monitor
Numbers reducing from previous week, FHI to monitor

Date:
19/06/23-25/06/23
Mortality:
9,548
Mortality Rate:
1.31%
Reason given: Viral Disease (PD)
Viral Disease (PD)
Freshwater wk 27; Business contacted: PD on-going challenge, fish are still impacted by previous gill insult so handeling is being done very carefully for the FW treatment, wk26 will be over reporting threshold.
Business contacted for additional information. Further notification expected for wk26. FHI to monitor.

Date:
26/06/23-02/07/23
Mortality:
13,323
Mortality Rate:
1.85%
Reason given: Viral Disease (PD)
Viral Disease (PD)
Site recently completed a FW treatment. In addition to the confirmed PD the site has been subject to recent enviromental challenges which has further elevated mortality onsite.
Site contacted for further information, FHI to monitor.

Date:
03/07/23-09/07/23
Mortality:
41,048
Mortality Rate:
5.81%
Reason given: Viral Disease (PD); Gill Health Related
Viral Disease (PD); Gill Health Related
FW week 27/28
Business contacted for further information. FW treatment conducted wk 27 into wk 28. Mortality peaked in Wk 27, and AGD has been identified on site. FW treatment has decreased mortality to 1.74% in wk 29. PD and HSMI have aslo been identified. Another freshwater treatment was been conducted on 14/07/2023 to help with AGD. Fish are responding well to feed. Potential for site to inspected wk 31. FHI to monitor. * % and number amended 07/08/23 following revised data submitted by Bakkafrost Scotland. Calibration counts were conducted at the site, taking in to account biomass removed by waste transfer company

Date:
10/07/23-16/07/23
Mortality:
15,831
Mortality Rate:
2.38%
Reason given: Viral Disease (PD/PRV); Gill Health Related
Viral Disease (PD/PRV); Gill Health Related
FW week 28 and 30
FW treatment being conducted. Mortality levels have decreased following these. Potential for FHI to visit in week 31. FHI to continue monitoring. * % and number amended 07/08/23 following revised data submitted by Bakkafrost Scotland. Calibration counts were conducted at the site, taking in to account biomass removed by waste transfer company

Date:
17/07/23-23/07/23
Mortality:
40,886
Mortality Rate:
6.30%
Reason given: Viral Disease (PD/PRV); Gill Health related
Viral Disease (PD/PRV); Gill Health related
FW Week 30 subject to weather
Inspection scheduled. * % and number amended 07/08/23 following revised data submitted by Bakkafrost Scotland. Calibration counts were conducted at the site, taking in to account biomass removed by waste transfer company

Date:
24/07/23-30/07/23
Mortality:
48,999
Mortality Rate:
8.05%
Reason given: Viral Disease (PD/PRV); Gill Health Related
Viral Disease (PD/PRV); Gill Health Related
FW week 30
Site inspected Wk 31, diagnostic samples taken

Date:
31/07/23-06/08/23
Mortality:
56,048
Mortality Rate:
10.02%
Reason given: Gill Health Related
Gill Health Related
Targetted harvests.
Site inspected Wk 31 - Diagnostic samples taken.

Date:
07/08/23-13/08/23
Mortality:
40,530
Mortality Rate:
8.05%
Reason given: Gill Health Related
Gill Health Related
Targeted Harvests
12th consecutive mortality report. Site inspected Wk 31 - awaiting diagnostic results. Contacted business correspondant - estimated mortality for Wk 33 is 4.72%. FHI to monitor.

Date:
14/08/23-20/08/23
Mortality:
19,014
Mortality Rate:
4.52%
Reason given: Gill Health Related
Gill Health Related
Targeted Harvests; FW week 35
Site was inpected 31/7/2023, complex gill issues, SAV, furunculosis identified. FHI to monitor. Mortalities continue to be ~4% week 34, FW treatment is planned for this week (35) FHI to monitor.

Date:
21/08/23-27/08/23
Mortality:
14,261
Mortality Rate:
4.03%
Reason given: Gill Health Related
Gill Health Related
Targeted Harvests; FW week 35/36
Site was inpected 31/7/2023, complex gill issues, SAV, furunculosis identified. FHI to monitor.

Date:
28/08/23-03/09/23
Mortality:
9,684
Mortality Rate:
2.85%
Reason given: Gill Health Related
Gill Health Related
FW week 35/36. Some pens have already been harvested in recent weeks, with another to be harvested in wk 38. Poor gill health is the primary driver of mortality.
Site visited and diagnostic conducted 31/07/2023 (gill health issues identified and furunculosis). FHI to monitor.

Date:
04/09/23-10/09/23
Mortality:
8,673
Mortality Rate:
2.63%
Reason given: Gill Health Related
Gill Health Related
FW week 36; Harvests
Site visited and diagnostic conducted 31/07/2023 (gill health issues identified and furunculosis). FHI to monitor.

Date:
11/09/23-17/09/23
Mortality:
34,281
Mortality Rate:
10.65%
Reason given: Gill Health Related
Gill Health Related
Mortality ongoing. Site visited on 31/07/2023 (gill health issues identified and furunculosis). Due to recent increase in mortality another inspection has been scheduled in due course. FHI to monitor

Date:
18/09/23-24/09/23
Mortality:
24,516
Mortality Rate:
9.21%
Reason given: Gill Health Related
Gill Health Related
Harvests
FHI to visit.

Date:
25/09/23-01/10/23
Mortality:
3,024
Mortality Rate:
2.32%
Reason given: Gill Health Related
Gill Health Related
Harvests
Mortality significantly reduced, FHI to visit.

Date:
02/10/23-08/10/23
Mortality:
881
Mortality Rate:
1.86%
Reason given: Gill Health Related
Gill Health Related
Harvests (Site Fallowed wk 40)
Site inspected and diagnostic samples taken in week 40. Site is now fallow.

Source

Inspection reports

Case Number: 2021-0200


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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


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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


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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


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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]

Source