Site Details: Scotasay

Cuddy Point
Scalpay
Isle of Harris
HS4 3YD
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 2019
Total losses: 28.1 %

Production cycle end date: Feb 2023
Total losses: 28.2 %

Source

Fish Health Inspectorate mortality

Date:
14/04/22-20/03/22
Mortality:
7,652
Mortality Rate:
1.36%
Reason given: Sea Lice Related
Sea Lice Related
Treatment related mortality.
Company contacted for further into: the whole site was treated with a thermolicer in week 11 and the mortality for week 12 is back below threshold. FHI to monitor.
Date:
27/06/22-03/07/22
Mortality:
6,841
Mortality Rate:
1.29%
Reason given: Gill health related
Gill health related
Business correpondent contacted. 3 pens affected and experiencing PGD symptoms, following increased plankton episode. Managing site by increasing aeration and reducing any handling in the 3 pens. FHI to monitor
Date:
04/07/22-10/07/22
Mortality:
7,427
Mortality Rate:
1.41%
Reason given: Gill Health Related
Gill Health Related
Mortality in the following week reduced below the reporting threshold. No plans to treat. Aeration is used at the site 24/7 and plankton is monitored daily to inform feeding regimes. FHI to monitor.
Date:
11/07/22-17/07/22
Mortality:
11,019
Mortality Rate:
2.13%
Reason given: Post-mechanical treatment; Gill Health Related
Post-mechanical treatment; Gill Health Related
Aereation; plankton monitoring
Business correpondent contacted. 3 pens affected and experiencing PGD symptoms, following increased plankton episode. Managing site by increasing aeration and reducing any handling in the 3 pens. FHI to monitor
Date:
18/07/22-24/07/22
Mortality:
9,155
Mortality Rate:
1.81%
Reason given: Sea Lice related (Post-mechanical treatment); Gill Health Related
Sea Lice related (Post-mechanical treatment); Gill Health Related
Aeration; plankton monitoring; monitor following mechanical treatments
Mortality rate increased wk 30. FHI to monitor post treatment mortality levels.
Date:
25/07/22-31/07/22
Mortality:
26,858
Mortality Rate:
5.41%
Reason given: Sea Lice related (Post-mechanical treatment); Gill Health Related
Sea Lice related (Post-mechanical treatment); Gill Health Related
Extended Freshwater (wk 31)
Business correspondent contacted. AGD and PDG confirmed wiith slight anaemia observed. Mechanical treatment not tolerated by fish and exacerbated mortalities. Extended freshwater treatment conducted in WK 31. FHI to consider inspection.
Date:
01/08/22-07/08/22
Mortality:
29,022
Mortality Rate:
6.18%
Reason given: Sea Lice related (Post-freshwater treatment)
Sea Lice related (Post-freshwater treatment)
Monitor post- completion of freshwater treatments
Gill anemia across site but two pens accounting for 2/3 of mortality. Treatment with freshwater. Considering putting the fish on functional feed. FHI to monitor.
Date:
08/08/22-14/08/22
Mortality:
26,251
Mortality Rate:
5.97%
Reason given: Sea Lice related (Post-freshwater treatment); Gill health related (Anaemia)
Sea Lice related (Post-freshwater treatment); Gill health related (Anaemia)
Functional feed scheduled
Gill anemia across site but two pens accounting for 2/3 of mortality. Treatment with freshwater. Considering putting the fish on functional feed. Mortalities still elevated. Update 25.8.22- FHI to visit when in the area -week 3.10.22
Date:
15/08/22-21/08/22
Mortality:
14,021
Mortality Rate:
3.39%
Reason given: Gill health related (Anaemia)
Gill health related (Anaemia)
FW scheduled wk 34/wk35; Functional feeds
unable to contact site for further information. FHI to follow up.
Date:
22/08/22-28/08/22
Mortality:
8,173
Mortality Rate:
2.05%
Reason given: Gill Health Related (Anaemia)
Gill Health Related (Anaemia)
FW scheduled wk 34/wk35; Functional feeds
Mortality levels are coming down but remain above the reporting threshold. FHI visit scheduled for 3.10.22
Date:
29/08/22-04/09/22
Mortality:
6,832
Mortality Rate:
1.75%
Reason given: Gill Health Related (Anaemia)
Gill Health Related (Anaemia)
FW scheduled wk 35/36
FHI to monitor post treatment numbers, inspectors scheduled to be in area WK 40 and WK 42
Date:
05/09/22-11/09/22
Mortality:
6,797
Mortality Rate:
1.77%
Reason given: Gill Health Related (Anaemia)
Gill Health Related (Anaemia)
FW wk 36
FHI to monitor post treatment numbers, inspectors scheduled to be in area WK 40 and WK 42
Date:
12/09/22-18/09/22
Mortality:
7,385
Mortality Rate:
1.96%
Reason given: Gill Health Related; Handling
Gill Health Related; Handling
Monitor & treat as required following FW and mechanical treatment; FW anticipated wk 39/40
Mortality level remaining constant, although some related to recent treatment. FHI to monitor, inspector in area wk42
Date:
19/09/22-25/09/22
Mortality:
7,039
Mortality Rate:
1.91%
Reason given: Gill Health Related; Handling (Post-treatment)
Gill Health Related; Handling (Post-treatment)
Monitor & treat as required following FW and mechanical treatment; FW anticipated wk 39/40
Mortality level remaining constant. FHI to monitor, inspector in area wk 42.
Date:
26/09/22-02/10/22
Mortality:
27,506
Mortality Rate:
7.64%
Reason given: Gill Health Related; Handling (Post-treatment)
Gill Health Related; Handling (Post-treatment)
Monitor & treat as required following mechanical treatment
Considerable drop in mortality levels from previous week. Site to be inspected wk 42.
Date:
03/10/22-09/10/22
Mortality:
5,158
Mortality Rate:
1.55%
Reason given: Gill Health Related
Gill Health Related
FW wk 42
Considerable drop in mortality levels from previous week. Site to be inspected wk 42. Continue to monitor.
Date:
31/10/22-06/11/22
Mortality:
5,859
Mortality Rate:
1.44%
Reason given: Viral Disease; Gill health related
Viral Disease; Gill health related
FW scheduled week 45/46
FHI visited and diagnostic taken wk 42. Confirmed PRV, gill issues and evidence of Pasturella skyensis identified from sampling. FHI to monitor.
Date:
07/11/22-13/11/22
Mortality:
9,047
Mortality Rate:
2.26%
Reason given: Viral Disease; Gill health related
Viral Disease; Gill health related
FW week 45
FHI visited and diagnostic taken wk 42. Confirmed PRV, gill issues and evidence of Pasturella skyensis identified from sampling.
Date:
14/11/22-20/11/22
Mortality:
4,845
Mortality Rate:
1.24%
Reason given: Viral Disease; Gill health related
Viral Disease; Gill health related
Targeted Harvest
Continuation of mortalities due to PRV and gill health issues, numbers have reduced this week. The site was inspected and diagnositc samples taken in week 42
Date:
21/11/22-27/11/22
Mortality:
4,132
Mortality Rate:
1.30%
Reason given: Viral Disease; Gill health related
Viral Disease; Gill health related
Targeted Harvest
CMS confirmed on site. The site was inspected and diagnositc samples taken in week 42. FHI to monitor.
Date:
28/11/22-04/12/22
Mortality:
6,426
Mortality Rate:
2.77%
Reason given: Gill Health Related
Gill Health Related
Harvests
Business correspondant contacted - currently no set date for the last pen to be harvested (mortality will be monitored) but likely site will be fallow by end of January at the latest. FHI to monitor.
Date:
05/12/22-11/12/22
Mortality:
2,495
Mortality Rate:
1.65%
Reason given: Viral Disease, Gill Health
Viral Disease, Gill Health
Targetted harvests, FW treatment on 1 pen
Mortalities decreased from previous week. Site to fallow in January. FHI to monitor.
Date:
12/12/22-18/12/22
Mortality:
1,334
Mortality Rate:
1.43%
Reason given: Gill health, viral disease
Gill health, viral disease
FW and FLS treatment undertaken, fish thinned down
Mortalities continuing to descrease. Fish are being thinned down with a plan in place to fallow site in January. FHI to monitor
Date:
02/01/23-08/01/23
Mortality:
823
Mortality Rate:
1.58%
Reason given: Gill Health, Viral Disease
Gill Health, Viral Disease
FW treatment week2, Monitor
On-going health issues with intermittend reports above reporting criteria. Business correspondent confirmed extended FW treatments were completed last week. Company looking to monitor mortality and fish will be harvested if mortality presists. Site looking to fallow within the next 4 weeks. FHI visited in October 2022 and collected diagnostic samples. FHI to monitor.
Date:
09/01/23-15/01/23
Mortality:
1,057
Mortality Rate:
2.06%
Reason given: Gill Health, Viral Disease
Gill Health, Viral Disease
FW treatment week 2, Monitor
Business contacted. Freshwater treatment completed in wk 2 and company have increased monitoring of the stock remaining on site. Site estimated to be fallow within the next 2-3 weeks. Site visited in October 2022 with diagnostic samples taken. FHI to monitor
Date:
16/01/23-22/01/23
Mortality:
561
Mortality Rate:
1.12%
Reason given: Gill Health, Viral Disease
Gill Health, Viral Disease
Monitor following FW treatment week 2
Only two pens left, site to fallow next week.
Date:
23/01/23-29/01/23
Mortality:
642
Mortality Rate:
1.29%
Reason given: Viral Disease,Gill Health
Viral Disease,Gill Health
Monitor following FW treatment week 2
2 pens left on site. Site to fallow end of week 7.
Date:
30/01/23-05/02/23
Mortality:
1,014
Mortality Rate:
2.07%
Reason given: Viral Disease
Viral Disease
Harvests
Site due to fallow end of this week. FHI to monitor.
Date:
06/02/23-12/02/23
Mortality:
820
Mortality Rate:
1.71%
Reason given: Viral Disease
Viral Disease
Harvests
Site to fallow end of week 7. FHI to monitor.
Date:
13/02/23-19/02/23
Mortality:
732
Mortality Rate:
1.56%
Reason given: Viral Disease
Viral Disease
Harvests
Site now fallow. No further action.
Date:
25/03/24-31/03/24
Mortality:
6,578
Mortality Rate:
1.21%
Reason given: Bacterial Disease (Furunculosis)
Bacterial Disease (Furunculosis)
Targeted Harvest
First report this cycle. FHI to monitor.
Date:
08/04/24-14/04/24
Mortality:
6,142
Mortality Rate:
1.21%
Reason given: Bacterial Disease (Furunculosis)
Bacterial Disease (Furunculosis)
Targeted Harvests
FHI to monitor.

Source

Inspection reports

Case Number: 2021-0563


Download Stock: Geocrab and Heb Smolt (Mingarry Hatchery)
Management transferred from Mowi to TSSC in 2021. Fish input was on 13/10/2021.
Visibility of the fish was poor, due to the fish feeding deeply. Fish sampled for VMD were healthy and in good condition.
Recent Treatment:
Slice: 23/11 - 29/11/2021
Remote inspection conducted by supervised by on 01/12/2021.
Site inspection conducted by , and supervised by on 08/12/2021. VMD samples taken by and supervised by
on 08/12/2021. [Original PDF]

Case Number: 2022-0456


Download Mortality events commenced from wk 26 2022. Gill health issues were attributed to cause of mortality on site, with PGD being main issue following increased plankton episode. Aeration increased to manage plankton burden as well as reduction in handling.
Slight anaemia also observed on site. Mechanical treatments planned were cancelled due to the fish not tolerating mechanical treatment. FW treatments commenced in WK 31 to aid gill issues experienced on site. From health screening, initial results were positive for AGD, Brachiomonas cysticola and paranucleospora theridion. Functional feed scheduled for Wk32. mortalities remained high and constant following second round of FW treatments in Wk36.
Mortality events 2022 (all attributed to gill health and bacterial disease as described in recent disease problems):
Wk37, 7385, 1.96%
WK36, 6797,1.77%
Wk35, 6832, 1.75%
Wk34, 8137, 2.05%
Wk33, 14021, 3.30%
Wk32, 26251, 5.97%
Wk31, 29022, 6.18%
Wk30, 26868, 5.41%
Wk29, 9155, 1.81%
Wk28, 11019, 2.13%
Wk27, 7427, 1.41%
Wk26, 6841, 1.29%
Five fish were removed during the site inspection for diagnostic sampling purposes. All fish were observed to have liver colours of 2/3 as well as no food and yellow pseudofaeces present on examination. In addition, some hearts were observed to be pale and slightly enlarged. Pen two and three were observed to have an increased amount of moribund and lethargic fish on inspection. During site inspection, pen 8 was being treated with freshwater with a new wellboat- Ronja Star - as lice were increasing on site.
Cleanerfish mortality (wrasse and lumpfish) 2022:
Wk18, 8405, 14.80% (FW treatment)
Wk19, 17029, 35.18% (black losses)
WK23, 4990,16.56% (black losses)
Wk24, 4687, 18.65 (black losses) [Original PDF]

Case Number: 2022-0456


Download Mortality events commenced from wk 26 2022. Gill health issues were attributed to cause of mortality on site, with PGD being main issue following increased plankton episode. Aeration increased to manage plankton burden as well as reduction in handling.
Slight anaemia also observed on site. Mechanical treatments planned were cancelled due to the fish not tolerating mechanical treatment. FW treatments commenced in WK 31 to aid gill issues experienced on site. From health screening, initial results were positive for AGD, Brachiomonas cysticola and paranucleospora theridion. Functional feed scheduled for Wk32. mortalities remained high and constant following second round of FW treatments in Wk36.
Mortality events 2022 (all attributed to gill health and bacterial disease as described in recent disease problems):
Wk37, 7385, 1.96%
WK36, 6797,1.77%
Wk35, 6832, 1.75%
Wk34, 8137, 2.05%
Wk33, 14021, 3.30%
Wk32, 26251, 5.97%
Wk31, 29022, 6.18%
Wk30, 26868, 5.41%
Wk29, 9155, 1.81%
Wk28, 11019, 2.13%
Wk27, 7427, 1.41%
Wk26, 6841, 1.29%
Five fish were removed during the site inspection for diagnostic sampling purposes. All fish were observed to have liver colours of 2/3 as well as no food and yellow pseudofaeces present on examination. In addition, some hearts were observed to be pale and slightly enlarged. Pen two and three were observed to have an increased amount of moribund and lethargic fish on inspection. During site inspection, pen 8 was being treated with freshwater with a new wellboat- Ronja Star - as lice were increasing on site.
Cleanerfish mortality (wrasse and lumpfish) 2022:
Wk18, 8405, 14.80% (FW treatment)
Wk19, 17029, 35.18% (black losses)
WK23, 4990,16.56% (black losses)
Wk24, 4687, 18.65 (black losses) [Original PDF]

Case Number: 2023-0449


Download Scotasay is currently stocked with fish from Applecross, Barcaldine and Landcatch. So far, they have had a good start to the cycle, mortality on site has remained low since input. In mid August of this year the site experienced a bloom of micro jellyfish which has lead to some environmental damage to the gills. Pens 6 and 8 were worst affected and are displaying some elevated scores for PGD. The site treated with freshwater on 27/08/2023 (Ronja Star) and again on 18/09/23 (Ronja Fisk) which has had a successful impact on treating the gills. Sea lice infestations have remained below the treatment threshold for the duration of this cycle thus far, the site conducted a precautionary SLICE treatment from 28//08/23 - 04/09/23.
The site has been continually stocking with wild caught ballan wrasse between 16/09/23 - 22/09/23. Two cleanerfish mortality events were observed occurring during the inspection of the sites records for this production cycle. These mortality events occurred during the two freshwater treatments the site has conducted this cycle, the first being on 27/08/23, 1766 (26.07%) and 3,521 (49.63%). For 24 hours prior to each FW treatment the site deployed 3 - 4 baited creels into each stocked pen in attempt to remove cleanerfish prior to treatment. The site also tried to separate the salmon stock from the cleaner fish stock using the well boats however this proved difficult due to the wrasse being of similar size to the salmon stocks.
Upon the physical inspection of the stock, fish were observed shoaling well and responding positively to routine feeding regimes. No clinical signs of disease were observed during the inspection of the stocks.
Fish removed for VMD sampling appeared healthy, with no gross pathology observed.
Cleanerfish : Week 39 (32, 0.90%), Week 38 (3,521, 49.63%), Week 37 (21, 0.35%), Week 36 (80, 1.31%). [Original PDF]

Source