Site Details: Soay

Ardhasaig
HS3 3DJ
Operator: Mowi Scotland Ltd
Water type: Seawater

Average female lice per fish

Source

Salmon Scotland mortality

Source

Cumulative mortality over full production cycle

Soay Production cycle end date: Jan 2019
Total losses: 19.7 %

Soay Production cycle end date: Jul 2020
Total losses: 24 %

Soay Production cycle end date: May 2021
Total losses: 5.5 %

Soay Production cycle end date: Jul 2023
Total losses: 8.1 %

Soay Production cycle end date: Aug 2024
Total losses: 76.1 %

Source

Fish Health Inspectorate mortality

Date:
26/06/23-02/07/23
Mortality:
3,988
Mortality Rate:
5.43%
Reason given: CMS
CMS
In harvest plan to be empty in w/c 10th July
Site fallow - no action required.
Date:
03/07/23-09/07/23
Mortality:
7,535
Mortality Rate:
3.47%
Reason given: CMS
CMS
In harvest plan to be empty in w/c 10th July
Site fallow - no action required.
Date:
10/07/23-16/07/23
Mortality:
1,450
Mortality Rate:
1.41%
Reason given: CMS
CMS
Site fallow as of 15th July
Site fallow. No further action.
Date:
08/01/24-14/01/24
Mortality:
13,305
Mortality Rate:
3.17%
Reason given: Treatment Losses
Treatment Losses
Business contacted: residual effects of previous FW treatement for AGD
Business contacted for additional information. FHI to monitor.
Date:
22/01/24-28/01/24
Mortality:
6,580
Mortality Rate:
1.63%
Reason given: Treatment / AGD / Predator
Treatment / AGD / Predator
Business contacted: residual mortality from AGD treatments and predator stress.
FHI to monitor.
Date:
05/02/24-11/02/24
Mortality:
16,594
Mortality Rate:
4.25%
Reason given: Treatment loss / AGD
Treatment loss / AGD
FHI to monitor.
Date:
12/02/24-18/02/24
Mortality:
8,921
Mortality Rate:
2.38%
Reason given: Wellboat treatment (freshwater) / AGD
Wellboat treatment (freshwater) / AGD
Business contacted: These fish were originally moved from Hellisay, impacted by gill issue. Proportion of fish were not recovering, but there are also a proportion that have recovered and are doing well. Bacterial infection (Moritella) has also developed on the site. Starting antibiotic (Florfenicol) treatment next week (wk9), 10 days duration. Treatments have been conducted for AGD. Large size variation within the pens. After the antibiotic treatment the fish will be graded and the remaining portion of fish that have not recovered from the initial gill issues will be culled.
Business contacted for additonal information. FHI to monitor.
Date:
19/02/24-25/02/24
Mortality:
12,799
Mortality Rate:
3.50%
Reason given: Bacterial infection
Bacterial infection
FHI to monitor.
Date:
26/02/24-03/03/24
Mortality:
16,003
Mortality Rate:
4.54%
Reason given: Bacterial Infection
Bacterial Infection
FHI to monitor.
Date:
04/03/24-10/03/24
Mortality:
12,667
Mortality Rate:
3.77%
Reason given: Bacterial Infection
Bacterial Infection
Antibiotic treatment completed on 10th March
FHI to monitor. Inspection scheduled.
Date:
11/03/24-17/03/24
Mortality:
8,347
Mortality Rate:
2.58%
Reason given: Bacterial Infection
Bacterial Infection
FHI to monitor. Inspection scheduled.
Date:
18/03/24-24/03/24
Mortality:
7,718
Mortality Rate:
2.45%
Reason given: Poor performers / Treatment losses
Poor performers / Treatment losses
FHI to monitor. Inspection carried out 26/03/2024. Diagnostic samples taken.
Date:
25/03/24-31/03/24
Mortality:
5,898
Mortality Rate:
1.92%
Reason given: Bacterial infection (Tenacibaculum)
Bacterial infection (Tenacibaculum)
Site visited 26/3/24 (2024-0096), diagnostic samples collected. Results outstanding. FHI to monitor.
Date:
01/04/24-07/04/24
Mortality:
5,627
Mortality Rate:
1.86%
Reason given: Bacterial infection (Tenacibaculum)
Bacterial infection (Tenacibaculum)
Site visited 26/3/24 (2024-0096), diagnostic samples collected. Results outstanding. FHI to monitor.
Date:
08/04/24-14/04/24
Mortality:
4,636
Mortality Rate:
1.57%
Reason given: Bacterial infection (Tenacibaculum)
Bacterial infection (Tenacibaculum)
FHI visited 26/3/24. Diagnostic samples collected. Diagnostic case review outstanding. FHI to monitor.
Date:
15/04/24-21/04/24
Mortality:
3,859
Mortality Rate:
1.32%
Reason given: Bacterial infection (Tenacibaculum)
Bacterial infection (Tenacibaculum)
FHI visited 26/3/24 (case number 2024-0096). Diagnostic samples collected. Diagnosis: Yersinia ruckeri, ISA HPR0 (non-pathogenic), IPN, Gill issues. FHI to monitor.
Date:
22/04/24-28/04/24
Mortality:
3,999
Mortality Rate:
1.39%
Reason given: Bacterial infection (Tenacibaculum)
Bacterial infection (Tenacibaculum)
FHI visited 26/3/24 (case number 2024-0096). Diagnostic samples collected. Diagnosis: Yersinia ruckeri, ISA HPR0 (non-pathogenic), IPN, Gill issues. FHI to monitor.
Date:
20/05/24-26/05/24
Mortality:
3,284
Mortality Rate:
1.20%
Reason given: Gill damage from Plankton Bloom / CMS
Gill damage from Plankton Bloom / CMS
FHI visited 26/3/24 (case number 2024-0096). Diagnostic samples collected. Diagnosis: Yersinia ruckeri, ISA HPR0 (non-pathogenic), IPN, Gill issues. FHI to monitor.
Date:
27/05/24-02/06/24
Mortality:
2,832
Mortality Rate:
1.04%
Reason given: Gill damage from Plankton Bloom / CMS
Gill damage from Plankton Bloom / CMS
FHI visited 26/3/24 (case number 2024-0096). Diagnostic samples collected. Diagnosis: Yersinia ruckeri, ISA HPR0 (non-pathogenic), IPN, Gill issues. FHI to monitor.
Date:
03/06/24-09/06/24
Mortality:
12,718
Mortality Rate:
4.74%
Reason given: Treatment losses (Thermolicer) / Gill damage
Treatment losses (Thermolicer) / Gill damage
FHI visited 26/3/24 (case number 2024-0096). Diagnostic samples collected. Diagnosis: Yersinia ruckeri, ISA HPR0 (non-pathogenic), IPN, Gill issues. FHI to monitor.
Date:
17/06/24-23/06/24
Mortality:
4,069
Mortality Rate:
1.60%
Reason given: Treatment losses & HSMI
Treatment losses & HSMI
FHI visited 26/03/24 (2024-0096). Diagnostic samples collected - Yersinia ruckeri, ISA HPR0 (non-pathogenic), IPN, Gill issues. FHI to monitor.
Date:
24/06/24-30/06/24
Mortality:
8,974
Mortality Rate:
3.58%
Reason given: Treatment losses & HSMI
Treatment losses & HSMI
FHI visited 26/03/24 (2024-0096). Diagnostic samples collected - Yersinia ruckeri, ISA HPR0 (non-pathogenic), IPN, Gill issues. FHI to monitor.
Date:
01/07/24-07/07/24
Mortality:
3,350
Mortality Rate:
1.46%
Reason given: Treatment losses & HSMI
Treatment losses & HSMI
FHI visited 26/03/24 (2024-0096). Diagnostic samples collected - Yersinia ruckeri, ISA HPR0 (non-pathogenic), IPN, Gill issues. FHI to monitor.
Date:
08/07/24-14/07/24
Mortality:
2,458
Mortality Rate:
1.23%
Reason given: HSMI
HSMI
Mortality rate is decreasing, FHI to monitor.
Date:
15/07/24-21/07/24
Mortality:
2,198
Mortality Rate:
1.77%
Reason given: HSMI
HSMI
FHI visited. Diagnostic samples taken, awaiting results.
Date:
22/07/24-28/07/24
Mortality:
2,101
Mortality Rate:
1.93%
Reason given: HSMI
HSMI
Site visited 25/7/24 (2024-0281). Diagnostic samples collected. Awaiting results.
Date:
29/07/24-04/08/24
Mortality:
3,102
Mortality Rate:
2.91%
Reason given: HSMI
HSMI
Site visited 25/7/24 (2024-0281). Diagnostic samples collected. Awaiting results.
Date:
05/08/24-11/08/24
Mortality:
4,338
Mortality Rate:
4.19%
Reason given: CMS
CMS
Site visited 25/7/24 (2024-0281). Diagnostic samples collected. Awaiting results.
Date:
12/08/24-18/08/24
Mortality:
767
Mortality Rate:
1.04%
Reason given: CMS
CMS
Business contacted: Only few fish remaining. Site planned fallow by the end of wk 35, subject to change.
Site visited 25/7/24 (2024-0281). Diagnostic samples collected. Awaiting results.

Source

Inspection reports

Case Number: 2020-0193


Download Mortality information - Reported.
MRT01598 -week 14 - 1.95% 11198 fish @ 3kg Acute morets and physical damage due to thermolicer.
MRT01627 -week 18 - 1.14% 5657 fish @ 3.3kg Acute treatment losses
Cleanerfish Mortality - wk19- 1891, wk18 - 2441, wk17 - 1236, wk16-1059
Last salmosan treatment - end of April 7 pens treated.
Alphamax treatment used for Caligus settlement last year
Thermolicer treatments also used to keep lice under control, with freshwater treatments used in 2019.
Full site treatments - Salmosan starting 14/05/2019 - Pre-adult settlement. Site manager expects to see a small spike in mortality due to CMS and PD confirmed on site. mortality spike in week 18 attributed to treatment loss in one pen. Large fish with CMS, didn’t take well to salmosan treatment.
Pen number 2. Mortality returned to normal the following week. [Original PDF]

Case Number: 2022-0174


Download Additional morts salmon: 2020 wk 27 2474 (1.02%) PD/CMS, wk 28 1677 (1.42%) PD/CMS
Cleaner fish mort peaks: 2020 wk 24 8929 (17.08%)without diagnosis, wk 25 12516 (28.88%)without diagnosis, wk 26 6941
(22.52%) other infectious diseases and without diagnosis, wk 27 6612 (74.44%)without diagnosis, discussed with site manager, he wasn’t sure what the undiagnosed was but thought that this was the end of cycle cull at the harvest station.
Site currently treating with slice, salmosan had been administered earlier in May. [Original PDF]

Case Number: 2024-0096


Download Peaks in salmon mortality 2023 wk 24 2942 (0.85%), wk 25 2881 (0.91%), wk 26 3988 (1.49%) , wk 27 7535 (3.47%), wk 28
1450 (1.41%) mainly attributed to CMS but some moritella. Wk 50 3463 (0.80%), wk 51 3376 (0.78%), wk 52 3587 (0.85%) these were recorded as seal predation and without diagnosis.
Salmon mortalities in 2024 have been persistently elevated, a fw treatment loss occurred in week 2 (13305 (3.17%), with physical damage and seal predation the main cause of mortality until week 6 with 16256 recorded. Week 6 16594 (4.25%) was recorded in the main as fw treatment loss but gill infection (AGD) and physical damage also noted. Week 7 8921 (2.38%) were partly due to the treatment losses in week 6 but mainly attributed to bacterial infection (Moritella) which is recorded predominantly as the cause of mortality through to week 12 with 44723 recorded.
Salmon morts for the last five weeks: wk 12 7718 (2.45%), wk 11 8347 (2.58%), wk 10 12667 (3.77%), wk 9 16003 (4.54%) wk
8 12799 (3.50%).
Lumpfish mortalities for the last four weeks: 17867 no diagnosis.
Wrasse peaks in mortality, 2022: Wk 33 8994 (12.32%), wk 34 (8332 (11.78%)
Lumpfish peaks in mortality 2023: wk 14 2599 (3.78%), wk 15 2996 (4.53%), wk 16 2900 (4.59%), wk 17 2582 (4.28%).
Fish were transferred from Hellisay in October due to water quality issues (jellyfish and gill health)
A number of moribunds and lethargic were observed, clinical signs included lesions and fin erosion, five were removed for diagnostic sampling.
Mort, sea lice and treatment records inspected remotely on the 21/3/2024 remaining records inspected on the 26/3/2024. [Original PDF]

Case Number: 2024-0281


Download Site inspected in overcast conditions and a calm sea state, visibility of the stocks was good. The site was inspected following reports of prolonged increased mortality. The site was previously inspected on 26/03/2024 and diagnostic samples were taken, case 2024-0096.
Upon inspection of the stocks, fish were observed to be residing quite deep within the pens. The majority of the population were observed shoaling well. A small population of fish in each pen were slightly lethargic. 2 moribunds, with one fish displaying abnormal swimming behaviour was removed from pen 7 for diagnostic sampling. 3 further moribunds were observed in pens 3 and 14 and were removed for sampling.
Salmon mortalities at Soay have been persistently elevated throughout the duration of 2024. For May June and July mortality has regularly been above 1% weekly. Since the date of last inspection, mortality peaked at 4.74% w/b03/06/24 and 3.58% wb
24/06/2024. In these weeks mortality was mainly attributed to treatment losses (post thermolicer treatment), Gill damage and
HSMI.
Cleanerfish mortality within last 4 weeks : Ballan Wrasse - 44, 1.15%. Lumpfish - 867, 4.36%.
Recent mortality within the last 4 weeks has been mainly attributed to HSMI and treatment losses.
Lice levels on site appeared low upon inspection of the stocks. [Original PDF]

Source