Site Details: Cole Deep

Gremista
Lerwick
ZE1 0PX
Operator: Scottish Sea Farms 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

Production cycle end date: Jan 2020
Total losses: 40.1 %

Production cycle end date: Feb 2022
Total losses: 12.8 %

Production cycle end date: Jun 2024
Total losses: 14.7 %

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Fish Health Inspectorate mortality

Date:
21/11/22-27/11/22
Mortality:
14,645
Mortality Rate:
1.60%
Reason given: Transfer Related
Transfer Related
Physical damage; Poor weather; Vet/FH diagnostic visit
Post transfer mortality, poor weather post input excaserbating mortality numbers. Numbers are reducing. FHI to monitor.

Date:
03/06/24-09/06/24
Mortality:
520
Mortality Rate:
1.5%
Reason given: Environmental
Environmental
Harvesting to fallow
FHI to monitor.

Date:
10/06/24-16/06/24
Mortality:
1,302
Mortality Rate:
3.7%
Reason given: Environmental
Environmental
Harvesting to fallow in wk 25
FHI to monitor.

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Inspection reports

Case Number: 2021-0269


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1 dead observed near middle of cage 9, not fresh dead. No issues reported on site, sea lice numbers very low. There had been an increase of caligus at neighbouring sites, but numbers still low at Cole Deep.
1 fish sampled for VMD appeared healthy, with very few lice observed, no adult female Leps.
Very calm weather and good visibility. Fish were deeper in the water column, but cages being fed showed a good feed response. All feeding at GSS sites is now conducted remotely from a central 'control' room at the main office in Lerwick.
All harvests for site are planned to be dead haul. [Original PDF]

Case Number: 2023-0223


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Fish visually inspected on site appeared healthy with only 2 lethargic fish observed across the whole site. Fish removed for vmd sampling showed no gross pathology when examined.
Mortality records showed mortality levels were at 1.63% & 1.51% for pens 9 & 7 over week 44 2023. This was attributed to failed smolts/ post transfer but overall site mortality level remained below reporting level. Whole site mortality reach 1.6% week
47 2023 (21/11 - 27/11), again attributed to transfer of stock and physical damage. This was reported to the FHI. [Original PDF]

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