Site Details: Nevis A

Mallaig Industrial Estate Building 4
PH41 4PX
Operator: Scottish Sea Farms Ltd
Water type: Seawater

Average female lice per fish

Source

Salmon Scotland mortality

Source

Cumulative mortality over full production cycle

Nevis A Production cycle end date: Oct 2019
Total losses: 25.5 %

Nevis A Production cycle end date: Aug 2021
Total losses: 5.2 %

Nevis A Production cycle end date: Nov 2022
Total losses: 46.8 %

Source

Fish Health Inspectorate mortality

Date:
12/09/22-18/09/22
Mortality:
4,649
Mortality Rate:
1.1%
Reason given: Environment; Gill Health Related post jellyfish bloom
Environment; Gill Health Related post jellyfish bloom
CGD; destocking through harvest
First report, FHI to monitor.
Date:
19/09/22-25/09/22
Mortality:
19,385
Mortality Rate:
4.7%
Reason given: Environment; Gill Health Related post jellyfish bloom
Environment; Gill Health Related post jellyfish bloom
CGD; destocking through harvest
Mortalities have increased rapidly. Seeking further info from business
Date:
26/09/22-02/10/22
Mortality:
27,017
Mortality Rate:
6.9%
Reason given: Environment; Gill Health Related
Environment; Gill Health Related
CGD; destocking through harvest
Currently harvesting and treating for AGD. Prioritising other Nevis sites for harvest at the moment as mortalities are improving thanks to treatments. FHI to monitor.
Date:
02/10/22-09/10/22
Mortality:
20,473
Mortality Rate:
5.6%
Reason given: Environment; Gill Health Related
Environment; Gill Health Related
CGD; destocking through harvest
Currently destocking through harvest. Peroxide treatments underway for AGD, treatments due to finnish 18/10/2022 depending on weather. FHI monitoring. Mortality figures updated (28/11/2022) following inspection (2022-0532).
Date:
10/10/22-16/10/22
Mortality:
28,576
Mortality Rate:
8.3%
Reason given: Environment; Gill Health Related
Environment; Gill Health Related
CGD; destocking through harvest
Mortalities are decreasing and site expected to be fallow 02/11/22. FHI to monitor. Mortality figures updated (28/11/2022) following inspection (2022-0532).
Date:
17/10/22-23/10/22
Mortality:
83,900
Mortality Rate:
26.6%
Reason given: Environment; Gill Health Related
Environment; Gill Health Related
CGD; harvesting to fallow in wk 43
Site inspected 26/10/22 and diagnostic sample taken. Mortality count updated by SSF 02/11/2022
Date:
24/10/22-30/10/22
Mortality:
19,480
Mortality Rate:
15.4%
Reason given: Environment; Gill Health Related
Environment; Gill Health Related
CGD; site to be fallow in wk 44
Site fallowed at the beginning of week 44.
Date:
16/09/24-22/09/24
Mortality:
3,855
Mortality Rate:
1.4%
Reason given: Gill health related
Gill health related
CGD; Post FW wellboat delicing
First report this cycle. FHI to monitor.
Date:
03/02/25-09/02/25
Mortality:
3,662
Mortality Rate:
2.7%
Reason given: Gill Health related; Sea Lice related
Gill Health related; Sea Lice related
AGD in sub-population, post physical delicing mortality, reduced into wk 7
FHI to monitor.
Date:
28/04/25-04/05/25
Mortality:
455
Mortality Rate:
1.3%
Reason given: Viral disease
Viral disease
CMS; Harvesting to fallow
FHI to monitor.

Source

Inspection reports

Case Number: 2021-0182


Download LUM - Swansea, WRS - Orkney
Since input lice above CoGP: 23/6/2020 0.56AF, all other weeks below. Very low numbers.
Only operator in CoGP management area.
Cleaner fish observed on site, salmon deeper in the pens and at times challenging light conditions resulting in decreased visibility. Seal observed near one of the pens during visit. Seal pro nets are being used on site and seals have so far not caused any problems. No moribund or lethargic fish observed. Fish sampled for VMD appeared healthy and in good condition.
Cleaner fish mortality records: Mortality in last 4 weeks between 24-74 per week for the entire site for both wrasse and lumpfish. Increase in mortality wk28 2020 with a peak in wk30 2020 at 2,353 morts, then slowly decreasing. Back to background level wk43 2020. Elevated mortalities related to treatments and some higher sea teamperatures for lumpfish.
Database entry records mortalities by different species but exports from the database don't reflect this. Company who provided the database is currently working on improving this.
Paperwork completed remotely on 3/6/2021 by , shadowed by . Physical site inspection on 9/6/21 by [Original PDF]

Case Number: 2022-0532


Download The site has been affected by the swarm of the hydrozoan Muggiaea Atlantica which has occurred throughout west coast
Mainland Scotland through to W. Shetland from end of August causing progressive gill inflammation, this combined with seasonal AGD resulted in CGD with associated high mortality.
Lumpfish came on from Bantry Marine Station, wrasse on site are wildcaught in Orkney.
Mortality events since last inspection:
Wk39 22: 27,017 (6.89%)
Wk38: 19,385 (4.7%)
Wk37: 4,649 (1.1%)
Wk34 21: 75 (1.5%)
Wk31: 957 (1.3%)
Wk30: 1,022 (1.1%)
2021 mortalities attributed to handling events during final harvesting of the site. 2022 mortalities all attributed to poor gill health.
Dead fish and waste are usually incinerated on site, however, due to the large volumes generated during the mortality events, mortalities were transported to Mallaig where they were uplifted by and taken to Ayr for disposal.
The last treatment of the cycle was a peroxide bath completed between 6-9th October 22.
Staff have been harvesting the site which was fallow on 31/10/2022.
Bad weather warning on day of inspection. Site was visited and 5 moribunds were removed from 2 cages for diagnostic sampling. Due to high swell and high winds, only these 2 cages were inspected as unsafe to remain on site. Fish in these 2 cages were lethargic with several moribunds observed in each. Fish removed for sampling had high lice burdens and fish were observed jumping in both cages.
Case sheet was updated and diagnostic report was re-issued on 21/11/2022 due to an update to a correction in the stock origin from the business. A statement was missing from the re-issued report, so a further report was issued on 23/11/2022. [Original PDF]

Case Number: 2023-0537


Download Low mortalities - mostly transfer morts
Cleaner fish mortalities - Wrasse recently stocked and at low density. Low mortalities < 100 fish since input
Average sealice count 0 since input
Site temperature used as inspector's unavailable
Inspection and paperwork carried out by , observed by [Original PDF]

Case Number: 2025-0082


Download Mortality Salmon: 22/09/2024 - 1.43% (3855) due to freshwater treatment losses, 09/02/2025 - 2.68% (3662) due to thermolicer treatment losses.
Wrasse mortality: Wk 7: 0.15% (37), Wk 8: 0.05% (12), Wk 9: 0.09% (22), Wk 10: 0.09% (21). Mortality has been low after initial input. 22/09/2024 - 1.19% (277). Before treatments wrasse are either creeled out or passive graded out of the crowded fish.
Treatments: Thermolicer treatment 3/02/2025 - fish were too big and affected by CMS that it was decided fish wouldn't be treated again unless absolutely necessary. Thermolicer treatments in September and December 2024. Freshwater in July
2024. Paramove in March and June 2024. SLICE in January, March and May 2024.
Sealice: Currently managing by harvest. When lice levels have risen, treatments have reduced the levels significantly.
Health Surveillance: Most recent vet report - November 2024 - One fish taken for diagnostic sampling - detected PRV (Piscine orthoreovirus). Most recent histo report - 19/02/2025 - heart pathology results possibly due of PMCV.
During physical inspection of the site, fish were shoaling well a few metres below the water surface. Fish had a good feeding response. Across the four stocked pens, 3 lethargic fish were observed. A total of 5 lice were seen. [Original PDF]

Source