Site Details: Loch Alsh (Sron)

Railway Pier
Ross-shire
Ross-shire
IV40 8AT
Operator: Mowi Scotland Ltd
Water type: Seawater

Average female lice per fish

Source

Salmon Scotland mortality

Source

Cumulative mortality over full production cycle

Loch Alsh Production cycle end date: Aug 2018
Total losses: 39.2 %

Loch Alsh Production cycle end date: Jun 2020
Total losses: 21.4 %

Loch Alsh Production cycle end date: Jun 2022
Total losses: 22.1 %

Loch Alsh Production cycle end date: Nov 2022
Total losses: 19.9 %

Loch Alsh Production cycle end date: Jun 2024
Total losses: 65.6 %

Source

Fish Health Inspectorate mortality

Date:
03/01/22-09/01/22
Mortality:
9,861
Mortality Rate:
1.72%
Reason given: Complex gill diseases and environmental gill damage.
Complex gill diseases and environmental gill damage.
Morality reduced in week following to below the reporting threshold, 0.78%. Site was visited 10/11/2021/ FHI to monitor.
Date:
16/05/22-22/05/22
Mortality:
Mortality Rate:
1.11%
Reason given: Jellyfish
Jellyfish
Buisiness corrospondat contacted, awaiting response. Mortality levels are reducing and are expected to be below reporting threshold. FHI Visited WB 23/05/2022. Business correspondant advises site is being harvested and should be fallow by 9th June.
Date:
23/05/22-29/05/22
Mortality:
9,251
Mortality Rate:
4.04%
Reason given: Jellyfish
Jellyfish
Mortality levels for following week indicate that final % will be above reporting threshold for a second consecutive week. Final fish being harvested from site wk 23.
Date:
30/05/22-05/06/22
Mortality:
10,086
Mortality Rate:
7.23%
Reason given: Jellyfish
Jellyfish
Site being harvested out
Final fish harvested from site wk 23. Site now fallow. No further action.
Date:
06/06/22-12/06/22
Mortality:
1,028
Mortality Rate:
3.47%
Reason given: Jellyfish
Jellyfish
Site now fallow
Date:
15/08/22-21/08/22
Mortality:
3,814
Mortality Rate:
1.21%
Reason given: Gill infections
Gill infections
Mortality rate dropped to 0.26% following week.
FHI to monitor.
Date:
19/09/22-25/09/22
Mortality:
5,259
Mortality Rate:
1.72%
Reason given: Gill infections / Jellyfish
Gill infections / Jellyfish
Mortality increasing again, FHI to monitor.
Date:
26/09/22-02/10/22
Mortality:
5,205
Mortality Rate:
1.74%
Reason given: Gill infections / Jellyfish
Gill infections / Jellyfish
Mortalities improving in week 40. FHI to monitor.
Date:
03/10/22-09/10/22
Mortality:
3,244
Mortality Rate:
1.10%
Reason given: Gill infections / Jellyfish
Gill infections / Jellyfish
Mortalities reducing. FHI to monitor.
Date:
24/10/22-30/10/22
Mortality:
7,876
Mortality Rate:
3.55%
Reason given: Gill infections
Gill infections
Site being harvested
Site estimated to be fallow by the end of week 46. FHI to monitor.
Date:
31/10/22-06/11/22
Mortality:
16,711
Mortality Rate:
7.47%
Reason given: Gill infections / Jellyfish
Gill infections / Jellyfish
Site estimated to be fallow by the end of week 46. FHI to monitor.
Date:
07/11/22-13/11/22
Mortality:
7,613
Mortality Rate:
5.11%
Reason given: Gill infections / Jellyfish
Gill infections / Jellyfish
Site harvesting out
Business correspondent contacted. Site planned o be fallow Wk 46. FHI to monitor.
Date:
14/11/22-20/11/22
Mortality:
567
Mortality Rate:
2.14%
Reason given: Gill infections / Jellyfish
Gill infections / Jellyfish
Site fallow. No further action.
Date:
09/10/23-15/10/23
Mortality:
21,118
Mortality Rate:
2.6%
Reason given: Gills, aneamia, treatment losses
Gills, aneamia, treatment losses
First report this cycle. FHI to monitor
Date:
16/10/23-22/10/23
Mortality:
35,318
Mortality Rate:
4.46%
Reason given: Gills, aneamia, treatment losses
Gills, aneamia, treatment losses
2nd report this cycle. Increase from 2.6% to 4.46%. Inspection scheduled.
Date:
23/10/23-29/10/23
Mortality:
99,717
Mortality Rate:
13.19%
Reason given: Gills, aneamia, treatment losses
Gills, aneamia, treatment losses
Site to be inspected wk45
Date:
30/10/23-05/11/23
Mortality:
112,206
Mortality Rate:
17.10%
Reason given: Gills, anaemia, treatment losses
Gills, anaemia, treatment losses
Currently FW treating, expect to be finished on Friday
FHI visited. Diagnostic samples taken, awaiting results.
Date:
06/11/23-12/11/23
Mortality:
110,703
Mortality Rate:
20.35%
Reason given: Gill health issues and treatments.
Gill health issues and treatments.
Historical mortality event identified during inspection of records (case 2025-0125). Diagnostic inspection was conducted on 08/11/2023 (Case 20230497). No further action required.
Date:
13/11/23-19/11/23
Mortality:
5,050
Mortality Rate:
1.17%
Reason given: Gill health issues and treatments.
Gill health issues and treatments.
Historical mortality event identified during inspection of records. Case 2025-0125. No further action required.
Date:
20/11/23-26/11/23
Mortality:
8,435
Mortality Rate:
1.97%
Reason given: AGD/Anemia
AGD/Anemia
Site inspected 08/11 (2023-0497). Diagnostic samples taken. AGD, Salmon gill poxvirus, SAV identified along with Paranucleospora theridion. FHI to monitor.
Date:
27/11/23-03/12/23
Mortality:
12,692
Mortality Rate:
3.02%
Reason given: AGD/Anemia
AGD/Anemia
Site inspected 08/11 (2023-0497). Diagnostic samples taken. AGD, Salmon gill poxvirus, SAV identified along with Paranucleospora theridion. FHI to monitor.
Date:
04/12/23-10/12/23
Mortality:
10,482
Mortality Rate:
2.58%
Reason given: AGD/Anemia
AGD/Anemia
FHI visited 8/11/23, case number 2023-0497. Diagnostic sample collected. Complex gill disease.
Date:
11/12/23-17/12/23
Mortality:
14,180
Mortality Rate:
3.58%
Reason given: AGD/Anemia
AGD/Anemia
FHI visited 8/11/23, case number 2023-0497. Diagnostic sample collected. Complex gill disease.
Date:
11/03/24-17/03/24
Mortality:
14,559
Mortality Rate:
2.57%
Reason given: Treatment Losses (FW in wellboat)
Treatment Losses (FW in wellboat)
FHI to monitor.
Date:
06/05/24-12/05/24
Mortality:
4,258
Mortality Rate:
1.03%
Reason given: Gill infections
Gill infections
Business contacted: CGD, site harvesting.
FHI to monitor.
Date:
13/05/24-19/05/24
Mortality:
5,050
Mortality Rate:
1.28%
Reason given: Gill infections
Gill infections
Business contacted: CGD, site harvesting.
FHI to monitor.
Date:
20/05/24-26/05/24
Mortality:
3,969
Mortality Rate:
1.12%
Reason given: Gill infections
Gill infections
Harvesting.
FHI to monitor.
Date:
27/05/24-02/06/24
Mortality:
4,585
Mortality Rate:
1.42%
Reason given: Gill infections
Gill infections
Business contacted: Site harvesting to fallow, currently planned by the end of the month.
FHI to monitor.
Date:
03/06/24-09/06/24
Mortality:
4,387
Mortality Rate:
1.51%
Reason given: Gill infections
Gill infections
Business previously contacted: Site harvesting to fallow, currently planned by the end of the month.
FHI to monitor.
Date:
10/06/24-16/06/24
Mortality:
4,061
Mortality Rate:
1.90%
Reason given: Gill infections
Gill infections
Business previously contacted: Site harvesting to fallow, currently planned by the end of the month.
FHI to monitor.
Date:
17/06/24-23/06/24
Mortality:
3,017
Mortality Rate:
2.67%
Reason given: Gill infections
Gill infections
Site fallowing in w/c 24th June.
FHI to monitor.

Source

Inspection reports

Case Number: 2021-0482


Download Stocked and fish transferred from Ardintoul. Freshwater treated prior to being moved. Stock origin, Stofinfiskur from Loch Loch
Cleanerfish Mortality (recent Wrasse);
Wk44: 1.53%, 876
Wk43: 1.63%, 947
Wk42: 2.63%, 1569
Wk41: 1.08%, 648
Cleanerfish mortality (recent Lumpfish);
Wk44: 0.78%, 239
Wk43: 3.54%,1118
Wk42: 3.45%, 1128
Wk41: 2.41%,808
Lumpfish seem to be in better condition due to handfeeding which keeps the fish away from the nets. Mortalities have reduced as a result through the new cycle.
Other Mortality peaks: Wrasse-2021 Wk 40, 4.49%, 1574; Wk 39, 3.01%, 1088
SAL-2019 Wk47: hydrolicer, anaemia and moribund
SAL-2020 Wk24: clinical CMS
SAL-2020 Wk25: clinical CMS
Wrasse were found to be positive for furunculosis in Oct 2021. W/b 08/11/2021 the fish are being treated with florifenicol (in block form).
Inspection completed by , observed by . VMD sampled by , observed by . [Original PDF]

Case Number: 2023-0177


Download All fish from Lochailort
Morts get transported to Ardintoul to be ensiled and then moved on for biogas
Lumpfish mortality last 4 weeks: Wk 16 - 1.29% (1701 fish), Wk 17 - 1.11% (1434 fish), Wk 18 - 0.68% (876 fish), Wk 19 -
0.88% (1117 fish)
Increased SAL mortality Weeks 20 to 23 in 2022 - 1.11% (3232), 4.04% (9251), 7.23% (10086) and 3.47% (1028) as well as
Wks 43 to 46 - 3.55% (7876), 7.47% (16711), 5.11% (7613), 2.14% (567). All mortality due to jellyfish (gill issues).
VMD samples taken from pens 4, 7 and 10.
Recent health report - 13th April - nothing significant, rising mort numbers due to likely bacteria but TBC. 28th April from vet - nothing of significance, signs of septicaemia.
Rising caligus lice numbers have resulted in planned Alphamax treatment.
On inspection of the site a handful of morts were observed across the whole site. Fish were swimming further down in the water column and had a good feed response.
Site inspection, paperwork and VMD completed by , observed by 16/05/2023 [Original PDF]

Case Number: 2025-0125


Download Risk assessments available for SW to SW movements - found to be satisfactory.
Elevated Lumpsucker mortalities - 2023 wk26 27184 (19.08%) wk27 13175 (11.43%), wk28 6919 (6.77%) wk37 11655
(16.33%), wk38 10787 (18.06%), wk40 7902 (18.24%), wk41 5793 (16.36%). 2024 wk11 5725 (10.12%). - The salmon had
FW treatments, during this time the site had difficulties separating the lump suckers during treatments. Following this site had dewaterers placed on boats to help. In addition, site now removes all cleaner fish prior treatments which are stored in a floating pen and kept with in the cage).
Wrasse were onsite on the previous cycle but were not at time of inspection. Records were checked for wrasse that were present in previous cycle.
Stock were observed to be shoaling and feeding well whilst swimming deep in the water column. Fish had a good feed and stimuli response. Stock that had originated from Lochailort were observed to have caudal fin damage but appeared to be healing well. Few spinal deformities were observed across site. 3 mortalities were observed across site and were removed at time of inspection. At time of inspection site were conducting Sea lice counts, which were observed - counts that were conducted were reflective of records. In addition, fish appeared to be in good condition.
3 fish were collected for VMD. The fish were observed to be in good condition externally and internally.
Site records and stock were inspected by whilst supervised by . VMD was sampled by whilst supervised by
. [Original PDF]

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