Site Details: Bay of Vady

Rousay
KW17 2PR
Operator: Cooke Aquaculture Scotland Ltd
Water type: Seawater

Average female lice per fish

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Salmon Scotland mortality

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Cumulative mortality over full production cycle

Bay of Vady Production cycle end date: Sep 2018
Total losses: 48.8 %

Bay of Vady Production cycle end date: Oct 2019
Total losses: 14.7 %

Bay of Vady Production cycle end date: Dec 2020
Total losses: 0.7 %

Bay of Vady Production cycle end date: Jan 2022
Total losses: 3 %

Bay of Vady Production cycle end date: Oct 2022
Total losses: 10.8 %

Bay of Vady Production cycle end date: Dec 2023
Total losses: 39.5 %

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Fish Health Inspectorate mortality

Date:
09/10/23-15/10/23
Mortality:
2,629
Mortality Rate:
1.48%
Reason given: Gills/ Predation
Gills/ Predation
First report, this input. FHI to monitor.
Date:
23/10/23-29/10/23
Mortality:
2,200
Mortality Rate:
1.46%
Reason given: Gill Health / Predator
Gill Health / Predator
WK43, submitted WK 50. Mortalities reduced below reporting levels
No Further Action
Date:
29/09/25-05/10/25
Mortality:
10,605
Mortality Rate:
1.62%
Reason given: Environmental/Predator
Environmental/Predator
Business contacted for additional information: majority of mortalitites attributed to gill health issues caused by environmental challenges, predation losses are due to seals.
First report this cycle. Business contacted for additional information. FHI to monitor.
Date:
06/10/25-12/10/25
Mortality:
20,220
Mortality Rate:
3.14%
Reason given: Environmental/Predator
Environmental/Predator
Business contacted for additional information: FW treatment completed. Decrease of mortality for wk 42 to 2.89% (not yet reported). Histology report from the business for the site shows complex multifactorial gill disease.
Business contacted for additional information. FHI to monitor. FHI visit scheduled.
Date:
13/10/25-19/10/25
Mortality:
18,025
Mortality Rate:
2.89%
Reason given: Environmental/Predator
Environmental/Predator
Business contacted for additional information: Complex gill disease, FW treatment completed.
Third consecutive report. Slight decrease from previous week. Business contacted for additional information. FHI visit scheduled.
Date:
27/10/25-02/11/25
Mortality:
6,049
Mortality Rate:
1%
Reason given: Gill Health/Environmental
Gill Health/Environmental
Treatment in progress
FHI visit scheduled.
Date:
03/11/25-09/11/25
Mortality:
27,286
Mortality Rate:
4.57%
Reason given: Gill Health/Environmental
Gill Health/Environmental
Treatment Complete
Site visited 11/11/25 (case number 2025-0435). Diagnostic samples collected, awaiting results. FHI to monitor.

Source

Inspection reports

Case Number: 2020-0513


Download Site records checked up until 20/11/2020 by on 20/11/2020
Site inspection and VMS sampling by - 25/11/20, movement records collected 24/11/20
3 cages remaining on site, currently harvesting site, with fish going through Kirkwall plant. No issues observed on site, fish were shoaling well and very good visibility on site at time of inspection. Fish sampled for VMD appeared healthy and was in very good condition. No sea lice observed.
No issues reported on site. [Original PDF]

Case Number: 2023-0281


Download The company makes a treatment plan on a case by case basis for lice management procedures and harvest strategies where parts of the population need to be held without treatment.
Farm management area is not fallowed synchronously as it includes both Cooke and Scottish Sea Farm sites.
Paperwork completed over teams 27/06/2023
Mortality event Wk19 2023 was not reported as it was within the 6 week post stocking period.
Site inspection and VMD samples carried out 28/06/2023.
During inspection of the pens on site a total of 7 moribund fish were observed hanging by the edges of pens. All other fish were deeper in the water column and shoaling together. Feed responses observed were good. A few fish were observed swimming with their mouths permanently open. The manager confirmed these fish were dubbed "screamers" and were unable to close their mouths at all however despite this a number of these fish were growing well.
Fish sampled for VMD appeared healthy externally and internally. [Original PDF]

Case Number: 2025-0435


Download Lice levels have been low since input, one treatment of Slice administered in the summer and then one treatment with the FLS
Flusher system.
Elevated mortalities reported to the FHI wk 40 10,605 (1.62%), wk 41 20,220 (3.14%), wk 42 18,025 (2.89%) these were reported to be mainly due to environmental issues resulting in complex gill issues and some predation from seals.
Mortalities did reduce but have increased once again, wk 43 2452 (0.40%), wk 44 6049 (1.00%), wk 45 26013 (4.35%), gill health related.
Site was split down on the 9th and 10th November with fish going to Carness, six pens were stocked on the day of inspection.
Lethargic and moribund fish observed in all cages inspected, five were removed for diagnostic sampling. [Original PDF]

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