Site Details: Hellisay

Sound of Hellisay Salmon Farm
Ardveenish North Bay
Isle of Barra Western Isles
HS9 5YA
Operator: Mowi Scotland 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

Hellisay Production cycle end date: Jan 2018
Total losses: 17.8 %

Hellisay Production cycle end date: Dec 2018
Total losses: 11.9 %

Hellisay Production cycle end date: Dec 2019
Total losses: 10.9 %

Hellisay Production cycle end date: Feb 2021
Total losses: 13.5 %

Hellisay Production cycle end date: Dec 2021
Total losses: 12.6 %

Hellisay Production cycle end date: Oct 2022
Total losses: 23 %

Hellisay Production cycle end date: Nov 2023
Total losses: 51.5 %

Source

Fish Health Inspectorate mortality

Date:
05/09/22-11/09/22
Mortality:
11,352
Mortality Rate:
2.35%
Reason given: CMS
CMS
Mortality is reducing, FHI to monitor.
Date:
12/09/22-18/09/22
Mortality:
5,666
Mortality Rate:
1.2%
Reason given: CMS
CMS
Mortality is reducing, FHI to monitor.
Date:
19/09/22-25/09/22
Mortality:
29,680
Mortality Rate:
6.38%
Reason given: Gill infections / Jellyfish
Gill infections / Jellyfish
Harvesting to fallow
Mortality increasing again. Fallow planned for week 42. FHI to monitor.
Date:
26/09/22-02/10/22
Mortality:
27,065
Mortality Rate:
7.91%
Reason given: Gill infections / Jellyfish
Gill infections / Jellyfish
Harvesting to fallow
Fewer fish remaining on site. Remaining harvest delayed by weather. Fallow planned for week 42. FHI to monitor.
Date:
03/10/22-09/10/22
Mortality:
29,280
Mortality Rate:
11.84%
Reason given: Gill infections / Jellyfish
Gill infections / Jellyfish
To confirm fallow date, was planned for week 42 (17/10/22); Update 14/10/22 PM, Hope to harvest out site in next two week. Harvest out date of 17/10/22 has been pushed back due to weather issues. Fish have been FW treated and are looking better with gills healing and morts coming down, CMS also thought to be an issue on site.
Date:
10/10/22-16/10/22
Mortality:
2,468
Mortality Rate:
1.65%
Reason given: Gill infections / Jellyfish
Gill infections / Jellyfish
Historic event - NFA
Date:
21/08/23-27/08/23
Mortality:
26,740
Mortality Rate:
3.12%
Reason given: AGD
AGD
Mainly treatment related mortalities post FW treatment. AGD has been an issue. Population is reported to be in good general health, and situation is improved FHI to monitor.
Date:
02/10/23-08/10/23
Mortality:
20,840
Mortality Rate:
2.60%
Reason given: AGD
AGD
FW treatment planed for this weekend
FHI to monitor post treatment. Updated following site inspection on 25/06/24 (2024-0186).
Date:
09/10/23-15/10/23
Mortality:
197,610
Mortality Rate:
30.53%
Reason given: AGD / Low oxygen
AGD / Low oxygen
Health manager contacted to arrange a site visit - Informed site will be fallow as they are moving the fish to West Loch Tarbert. Updated following site inspection on 25/06/24 (2024-0186).
Date:
16/10/23-22/10/23
Mortality:
59,540
Mortality Rate:
21.10%
Reason given: AGD / Low oxygen
AGD / Low oxygen
Contated health manage for more info; the three main factors impacting stocks at Hellisay have been gill infections (AGD) together with environmental challenges (both oxygen and plankton) and weather. Variable oxygen levels has been observed in many areas on the West coast this year including Hellisay and we are working at better understanding the causes which most likely are multifactorial with plankton blooms, warmer temperatures and water body dynamics.
Health manager contacted to arrange a site visit - Informed site will be fallow as they are moving the fish to West Loch Tarbert. Updated following site inspection on 25/06/24 (2024-0186).
Date:
30/10/23-05/11/23
Mortality:
80,145
Mortality Rate:
100.00%
Reason given: AGD/Environmental
AGD/Environmental
Final mort number from Octobers environmental event. Bad weather prevented access to the site until 1st November, where the remaining mortality were removed. Fish removed were decomposed.
Site fallow. Updated following site inspection on 25/06/24 (2024-0186).

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Inspection reports

Case Number: 2021-0352


Download VMD sampled by , observed by .
CNA/ESC Inspections on 17/03/2021 and 30/10/2019
Mooring works ongoing, winter check in September.
Site monitored by cameras above and below water from feed centre in Loch Boisdale. Generally able to get out to site in rough weather but working on the cages can be difficult due to large swell. Group formed for exposed sites to share experience with sites from Canada and Faroes. Only other Scottish site in this group is Colonsay.
Lumpfish stock almost gone due to two 12 hour FW treatments. Issues with Pseudomonas, treated with Florocol in June 2021.
Stocked in Erisort, transferred with the fish in wellboat from Erisort in FW for 6 to 8 hrs. Farmed juveniles from Ocean Matters.
Not graded out prior to FW treatment, hand netting some lumpfish out during crowd. No facility to separate cleanerfish from salmon. 21,670 fish died due to handling and lice treatments and 9,307 due to Pseudomonas in August (88.06% mortality).
Input count 47,948 - total mortality until August 43,746 (91.2% total) - reported to APHA.
Not taking fish from freshwater sources, just growing fish on from other SW sites. Not mentioned in FMS.
Pens 6, 8, 9, 10 from Rum Q3
Pens 1, 2, 3, 4 Erisort Q4
Pens 5, 7, 11, 12 Erisort Q3
Sea lice data missing in 2021 for weeks 16-28 now submitted to FHI.
Alphamax treatment in August for Caligus, very effective.
Freshwater treatment in weeks 31 and 32 2021
Thermolicer treatment weeks 34 and 35 2021 [Original PDF]

Case Number: 2024-0186


Download Fish came on from Loch Lochy in April 24 and have been vaccinated against Furunculosis and IPN. A mix of Fannads and stofinfisker stock. Large variation in weight at input but both stocks have been reported to be performing well since input with good feed intake and good growth. Site currently only stocks for 6 months before fish are moved off for ongrowing at other sea sites. No harvests are completed from Hellisay. Stock scheduled to be moved off to Loch Tarbert and Groatay in September for ongrowing to harvest, with the site being fallowed by October 24.
Mortalities above threshold since last inspection:
11/10/2021 - wk41 - 1.39% - 8,950 - Gill Diseases and PD
29/11/2021 - wk48 - 1.09%- 1,082 - CMS
05/09/2022 - wk36 - 2.35% - 11,352 - CMS
12/09/2022 - wk37 - 1.2% - 5,666 - CMS
19/09/2022 - wk38 - 6.38% - 29,680 - Gill infections / Jellyfish.
26/09/2022 - wk39 - 7.91% - 27,065 - Gill infections / Jellyfish
03/10/2022 - wk40 - 11.84% - 29,280 - Gill infections / Jellyfish
10/10/2022 - wk41 - 1.65% - 2,468 - Gill infections / Jellyfish
New cohort of fish:
21/08/2023 - wk34 - 3.12% - 26,740 - AGD
02/10/2023 - wk40 - 2.6% - 20,840 - AGD
09/10/2023 - wk41 - 30.53% - 197,610 - AGD / Low oxygen
16/10/2023 - wk42 - 21.1% - 59,540 - AGD / Low oxygen
30/10/2023 - wk44 - 100% - 80,145 - AGD / Environmental - whole pen of fish lost due to low oxygen and bad weather combined with compromised gills. Only cage left stocked on site before fallow.
All mortality events were reported as required, however there were some discrepancies between site records and FHI records.
These were a result of transfer losses and delays in final counts being received from the wellboat. Retrospective updates have been submitted and FHI records updated as required. NFA.
Health challenges last 2 crops were mainly AGD, exacerbated by environmental insults (Muggaeia atlantica from July followed by Apolemia uvaria in September). Fish will be gill swabbed every week and a FW treatments has been scheduled for July in anticipation of AGD developing on site.
SLICE treatment completed on 13th June 24. A 2nd SLICE treatment is planned for July.
Only site in DMA and CoGP MA.
Fish on site appeared in good physical health at the time of inspection and were active in the cages. One deformed and one moribund were observed in Cage 2 and were removed at the time for examination. No clinical signs observed so no diagnostic samples taken on this occasion. Fish removed for VMD were in good physical health and appeared clinically healthy externally and internally upon examination.
Sealice counts were observed on 2/3 cages. 20 fish per pen were removed for sampling. No leps were observed on any of the fish and 2 caligus were noted on the last fish from cage 1. [Original PDF]

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