Site Details: Westerbister
Scapa
Orkney
KW15 1SD
Water type: Seawater
Cumulative mortality over full production cycle
Production cycle end date: May 2018
Total losses: 5.3 %
Production cycle end date: Apr 2020
Total losses: 10.2 %
Production cycle end date: Mar 2022
Total losses: 23.7 %
Production cycle end date: May 2024
Total losses: 24.6 %
Fish Health Inspectorate mortality
24/07/23-30/07/23
6,703
1.40%
21/08/23-27/08/23
18,415
3.90%
04/12/23-10/12/23
9,661
2.60%
18/12/23-24/12/23
3,549
1.1%
01/04/24-07/04/24
3,258
1.20%
22/04/24-28/04/24
1,558
1.1%
29/04/24-05/05/24
598
1.10%
Inspection reports
Case Number: 2021-0356
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Stock on site inputted in July 2020 from Barcaldine
Risk assessment in place to support the case of non-synchronous fallow of the area
Slice treatments in fish which went to Hunda for caligus and in summer for Leps
Average female leps - 1.39 week 37; 1.34 week 36; 1.80 week 35; 1.34 week 34
Site to stock wrasse (local wild caught from Orkney) to help combat rising sea lice levels. Stock due in 8 October 2021.
Reported loss of stock upon input - captured through supplier mortality records.
Paperwork inspection by virtual meeting - Thursday 30 September 2021 - and
Site inspection by and . Samples from fish 1, fish 2 and fish 3 - pools 1 and 2 taken by . Samples from fish 4 and
5 - pool 3, and VMD samples from fish 6 and 7 taken by under the supervision of
Oxygen levels satisfactory on site and temperature beginning to drop. It is hoped that this will help to alleviate mortality issues.
Several moribund, lethargic and dead fish observed across the site. [Original PDF]
Case Number: 2023-0352
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Salmon on site originated from Stofinfisker and came on from Barcaldine Smolt Unit (FS1328). Salmon have been suffering from poor gill health during the last few weeks with pale, bleeding and necrotic gills being observed.
Company biologist attends the site every month as a minimum to collect routine histology and blood samples. Body condition is also scored and gills are checked.
Slice was completed end of june/beginning of july. Since input, the site has also done an Azasure treatment (Dec 22), peroxide
(Dec 22), thermolicer (Feb 23), freshwater treatments (May 23) and a hydrolicer (July 23).
FMA not fallowed synchronously, but RA available and found to be adequate.
Fish on site appeared in good health and were actively shoaling in the cages. 2 moribunds were observed across the site but were runts with no clinical signs of disease so were not removed for sampling.
Fish sampled for VMD appeared healthy externally and upon internal examination. [Original PDF]