Average female lice per fish

Source

Salmon Scotland mortality

Source

Cumulative mortality over full production cycle

Uyea Isle Production cycle end date: May 2018
Total losses: 24.5 %

Uyea Isle Production cycle end date: Jun 2019
Total losses: 11.9 %

Uyea Isle Production cycle end date: Jul 2020
Total losses: 8.3 %

Uyea Isle Production cycle end date: Jul 2021
Total losses: 7.6 %

Uyea Isle Production cycle end date: Jul 2022
Total losses: 7 %

Uyea Isle Production cycle end date: Jul 2023
Total losses: 8.2 %

Uyea Isle Production cycle end date: Aug 2024
Total losses: 18.5 %

Uyea Isle Production cycle end date: May 2025
Total losses: 20.1 %

Source

Inspection reports

Case Number: 2020-0339

Download Beginning of August restocked (06/08/2020) from Balta Isle (last fish moved on 12/08/2020). Site was fallow from 01/07/2020.
Harvest delayed due to coronavirus
All fish harvested dead
Hydrolicer available to use on request. First choice for lice issues is the hydrolicer. The hydrolicer is used all around Shetland and is operated by the company. They may let the use of the hydrolicer to another company if not being used by Cooke.
Bird nets, seal-pro sapphire netting, tensioned nets, contract with pest control company at shorebase
Some sites in the FMS are not synchronised with the same year class of fish
Marsali is new Migdale boat and has ben used to deliver fish to site
Some minor signs associated with AGD observed in last site visit by biologist (20/08/20), but no treatment thought necessary at that point.
ADD available to use at the shorebase if required
Remote inspection carried out by on 11/09/2020 via Microsoft Teams
Site inspection and sampling by
No issues noted on site, flat calm and excellent visibility, fish showed an excellent feeding response and were shoaling well.
Slight increase in AGD scores, but overall gill health was reported to be good this year so far and water temps have been slightly lower.
Fish sampled for VMD appeared healthy. [Original PDF]

Case Number: 2023-0073

Download From the physical inspection of the site, fish appeared to be in good condition. Fish were shoaling well and responded positively to hand feeding, observed during the capture of specimens for VMD sampling. A wider than normal variety in fish size was observed during the inspection of the stock. The site was diagnosed with PD earlier in the production cycle which had a varied impact on the feeding which appears to have slowed the growth of some fish. The site has since recovered and fish are back taking their full feed. Mortality has remained below the reporting threshold for the duration of the cycle.
Fish sampled for VMD were healthy with no clinical signs of disease observed internally. [Original PDF]

Case Number: 2026-0085

Download Treatments: Only hydrolicers and FLS treatments on site.
Pens 3, 5, 13 and 14 are in withdrawal for T.M.S
Last company health report (10/03/2026) had no significant findings - some fish with winter sores, some CGD.
Remote inspection carried out 13/03/2026. Remaining paperwork and physical inspection carried out 18/03/2026.
Physical inspection took place in adverse weather conditions. Each pen was inspected from the walkway but due to tidal conditions a full walk round each pen was not possible.
During the physical inspection, only one moribund was observed across the whole site and it had a small lesion on its flank.
Most fish were deep in the water column but a handful were seen leaping out of the water. No lice were observed.
One fish was removed from pen 12 for VMD sampling. This fish appeared healthy externally and internally. [Original PDF]

Source