Site Details: Invertote Salmon Farm

6 Broom Place
IV51 9HL
Operator: Organic Sea Harvest 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

Invertote Production cycle end date: Aug 2023
Total losses: 40.1 %

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Fish Health Inspectorate mortality

Date:
25/07/22-31/07/22
Mortality:
38,475
Mortality Rate:
4.25%
Reason given: Post AGD FW treatment
Post AGD FW treatment
Pen 9 are the smallest & worst affected population on the farm
Mortality rate for whole site (excluding pen 9) was below reporting threshold during reported week. FHI to monitor mortality levels post treatment.
Date:
02/01/23-08/01/23
Mortality:
9,278
Mortality Rate:
1.55%
Reason given: Primarily seal attacks (physical damage), some AGD/gill health related (secondary to stress from seals)
Primarily seal attacks (physical damage), some AGD/gill health related (secondary to stress from seals)
Business correspondent contacted. Site stocked with two separate year classes: 2022 S1 at 1.2kg and 2021 S0 3.9kg. Average of the year classes is given for weight on site. Notification of mortality following observation of seal in pens. Bad weather suspected as reason for seal to enter pens through security panel above the water line due to abrasion of net on pen structure. Diver and ROV checks followed with no hole being discovered below surface. FHI to monitor.
Date:
06/03/23-12/03/23
Mortality:
6,174
Mortality Rate:
1.19%
Reason given: Post AGD Treatment/ AGD/Seals
Post AGD Treatment/ AGD/Seals
Post AGD Treatments PCR results are good. Seal interactions have not caused any escapes and will be reported in separate notification to follow. Of reported morts 2429 are attributed to seals.
FHI to monitor. Await potential escape notification form.
Date:
26/06/23-02/07/23
Mortality:
3,296
Mortality Rate:
2.65%
Reason given: Ongoing CMS confirmed by FVG
Ongoing CMS confirmed by FVG
Primarily CMS. Stock is now nearing final harvest - Fallow End of July
First report over theshold for CMS. Site to be harvested out by end of July. FHI to monitor.
Date:
03/07/23-09/07/23
Mortality:
6,668
Mortality Rate:
6.01%
Reason given: Ongoing CMS confirmed by FVG
Ongoing CMS confirmed by FVG
Primarily CMS. Stock is now nearing final harvest - Fallow End of July
FHI to monitor.
Date:
10/07/23-16/07/23
Mortality:
12,757
Mortality Rate:
14.75%
Reason given: Ongoing CMS as confirmed by FVG
Ongoing CMS as confirmed by FVG
Primarily CMS. Stock is now nearing final harvest - Fallow End of July
Site is harvesting to fallow and planned to be fallow by 28/07/2023. FHI to monitor.
Date:
17/07/23-23/07/23
Mortality:
1,603
Mortality Rate:
2.28%
Reason given: Ongoing CMS as confirmed by FVG
Ongoing CMS as confirmed by FVG
Primarily CMS. Final harvest booked for 26/07/2023
Business contacted and confirmed the site is now fallow.
Date:
24/07/23-30/07/23
Mortality:
1,144
Mortality Rate:
2.80%
Reason given: Ongoing CMS as confirmed by FVG
Ongoing CMS as confirmed by FVG
Primarily CMS, Site fallow on 26/07/23
Site now fallow. No further action.
Date:
04/12/23-10/12/23
Mortality:
19,363
Mortality Rate:
3.47%
Reason given: AGD
AGD
Primarily AGD. Pen 7 receiving freshwater treatment 11/12/23. Pen 7 - AGD accounts for 94.5% (18,297) of total mortalities.
First report this cycle, FHI to monitor outcome of FW treatment
Date:
11/12/23-17/12/23
Mortality:
12,402
Mortality Rate:
2.32%
Reason given: AGD
AGD
Primarily AGD. All poulations have now received freshwater treatment.
Second report this cycle, mortality has decreased from previous week. FHI to monitor post treatment. (Reduced to 0.15% in week 51).
Date:
05/08/24-11/08/24
Mortality:
15,650
Mortality Rate:
1.42%
Reason given: Seals / Handling
Seals / Handling
2,052 Seals (0.19%)
First report over the threshold this calender year. FHI to monitor. Additional info received 23/8/24: Split by yearclass this would be 0.51% for 2023 S0s (>750g) and 0.91% for 2014 S1s (<750g) and would not have required to be reported.
Date:
12/08/24-18/08/24
Mortality:
7,035
Mortality Rate:
1.55%
Reason given: Seals
Seals
887 Seals (Pen 4)
Second consecutive week over the reporting threshold. FHI to monitor.
Date:
12/08/24-18/08/24
Mortality:
13,145
Mortality Rate:
2.10%
Reason given: Seals/ Handling
Seals/ Handling
10,731 Seals (Pen 2)
Second consecutive week over the reporting threshold. FHI to monitor.
Date:
19/08/24-25/08/24
Mortality:
4,845
Mortality Rate:
1.08%
Reason given: Seals
Seals
300 Seals (0.03%) (Pen 4)
Split by yearclass based on population average weight. Combined whole site 0.83%. FHI to monitor.
Date:
26/08/24-01/09/24
Mortality:
6,204
Mortality Rate:
1.40%
Reason given:
Pen 4 - 1,546 & Pen 10 - 1.976 (57% of Total)
Business contacted for further information. FHI inspection scheduled.
Date:
16/09/24-22/09/24
Mortality:
28,189
Mortality Rate:
2.75%
Reason given: Freshwater Treatments / Handling
Freshwater Treatments / Handling
S023 (1.05%)(Pen 8 - 0.76% of Total) & S124 (1.70%) Freshwater Treatments/Handling. S0 2023 stock and S1 2024 stock on site, report for whole site.
FHI visited 18/9/24 (2024-0372). Diagnostic sampled collected. Awaiting results.
Date:
23/09/24-29/09/24
Mortality:
64,316
Mortality Rate:
6.49%
Reason given: Freshwater Treatments / Handling
Freshwater Treatments / Handling
S023 (0.69% of total) & S123 (5.80% of total) - Freshwater Treatments/Handling (AGD) (wellboat delay/breakdown)
FHI visited 18/9/24 (2024-0372). Diagnostic sampled collected. Awaiting results.

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Inspection reports

Case Number: 2020-0036


Download PSI carried out in response to notification from business of increased mortality in lumpfish.
Lumpsucker mortality: 10/07/20 - 16/07 - 822 (2.83%), 17/07-23/07 - 2198 (7.79%), 24/07-30/07 - 4063 (15.62%). Mortality for this week so far at 5573 (25.38%).
Vet attended site on 23/07/2020. Vet report stated mortality most likely attributed to increased stress due to high Caligus burden and secondary skin infections from opportunistic bacteria (Tenibaculum and Vibrio spp.)
AMX tarpaulin treatments carried out on all cages (30/07 - 03/08) with lice reduction of 91% - 97% per cage recorded.
Salmon mortality has increased this reporting week (from 31/07) with losses so far of 11,091 (3.6%) attributed to post- treatment mortality. A mortality report is to be submitted to the FHI at the end of this week when the reporting week is complete.
Average Caligus levels before treatment reported as 65 (lumpfish) and 45 (salmon). Following treatment numbers fell to 4
(lumpfish) and 3.6 (salmon).
Average adult female sea lice (Lepeophtheirus salmonis) numbers have been consistently around 0.1.
Wrasse caught from Skye area. Lumpfish stocked from Anglesey (Ocean Matters)
Salmon stocked from Inverkerry (FS1061) and Girlsta (FS0504)
Neighbouring site Culnacnoc Salmon Farm (FS1344) to be stocked with S0's. Risk assessment for non-synchronous production in place, inspected during authorisation process.
Discharge consents in place for tarpaulin treatments. Site intends to only treat with Alphamax. [Original PDF]

Case Number: 2020-0465


Download Inspection of records carried out remotely on 29/10/2020
Caligus levels increased during July and August, resulting in increased mortality of fish, Alphamax treatments carried out reduced caligus levels significantly (91% - 97% per cage) and mortality fell as a result.
Recent mortality levels in lumpfish have been low (0.05% - 0.1%). Increased lumpfish mortality occurred during July and
August from 8% up to 25% during w/b 03/08. Mortality attributed to caligus damage and secondary bacterial infection. FHI were notified of this increase at the time. Lumpfish treated with Alphamx alongside the salmon, mortalities have subsequently fallen to low levels since September.
Wrasse mortality has been very low throughout the cycle.
Application in to MS-LOT and council for using A.D.D on site, as a contingency, seal presence around site is very low.
Site thermometer use as FHI thermometer had a battery failure.
Salmon deep in cages and difficult to observe, Lumpfish and wrasse seen near surface and appeared in good condition. [Original PDF]

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