Average female lice per fish

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Salmon Scotland mortality

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Cumulative mortality over full production cycle

Lochmaddy Production cycle end date: Jan 2019
Total losses: 27.6 %

Lochmaddy Production cycle end date: Oct 2020
Total losses: 36.1 %

Lochmaddy Production cycle end date: Feb 2023
Total losses: 17.4 %

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Inspection reports

Case Number: 2020-0233

Download The site representative was contacted in response to mortality notifications. Mortality has been ongoing since WK 21, however due to the ongoing corona virus restrictions, a physical inspection could not be undertaken.
The cause of the mortality is suspected to be PD. Health surveillance carried out by the company revealed PD on site in
February 2020. It is suspected that mortality has increased due to PD as a result of warmer weather. The company has harvested out 1 pen so far, and there are plans to increase harvests from the beginning of next week (WK26).
Previous to this mortality on site was low. Mortality for the last four weeks was:
WK21 - 1.35% (5708), WK22 - 1.76% (6978), WK23 1.41% (5489), WK24 1.35% (5183).
Mortality for this week so far stands at 0.22%, however it is suspected that the final percentage for the week will be over the reporting threshold.
Mortalities are disposed of via landfill at White Shore Cockles. It has recently been refitted to accommodate dryer and biomass machinery to recycle fish waste into fuel and is currently at the stage of commissioning, however work has temporally stopped.
It is hoped that the plant will be fully operational by winter this year, or early 2021.
H2O2 treatments undertaken in September and November 2019 for AGD, as well as a slice treatment for C. elongatus in July
2019
Sea lice on site have been low for the majority of this cycle, however they have risen above CoGP recommended treatment levels in the last three weeks: WK21 - 0.41 AF, WK22 - 0.37 AF, WK23 1.09 AF, WK24 - 1.09 AF. WK 25 - 1.15 AF. No chemical or mechanical intervention is planned, however more cleaner fish are being brought onto site. [Original PDF]

Case Number: 2021-0335

Download Wild caught ballan WRS (locally sourced). Added to site April to September. May add lumpfish during winter 2021.
Pancreas disease detected on site early 2020. Mortalities in Wk21 to Wk43 were confirmed as PD. Low level AGD on site at that time as well. Stock from Ormsary and Clachbreac.
2021: Current cycle have been vaccinated by PD. Ormsary stock.
All harvests are by deadhaul.
Cleanerfish Mortality per production cycle:
2017 1322 ballan wrasse
2019 5137 ballan wrasse
2021 688 ballan wrasse
Site is split into two groups with fish currently stocked in Caolas Loch Portain group.
Fish due to be split down into Ferramus group which is being prepped.
Fish sampled for VMD appeared healthy.
Remote inspection conducted by and supervised by on 28/09/2021.
Site inspection conducted by supervised by on 06/10/2021.
VMD sampling conducted by , supervised by on 06/10/2021. [Original PDF]

Case Number: 2023-0519

Download Mortalities had been low post input (week 11 2023) until week 26 with a peak recorded on week 27 with 1760 (0.32%), mortalities continued to be elevated with a second peak noted in week 32 of 2262 (0.42%) and week 33 2259 (0.40%), numbers had decreased but then had increased in week 36 and have continued to be elevated, mixed causes failed smolts, handling and AGD.
Morts for the last five weeks have been wk 40 8074 (1.47%), wk 41 13,503 (2.5%), wk 42 20,307 (3.85%), wk 43 30,186
(6.11%) and wk 44 21,975 (4.79%). Wk 45 6279, (1.45%) These are attributed to AGD.
AGD the only identified issue on site, two FW treatments have been administered, first in August and a second in November.
Wrasse mortalities last four weeks wk 43 111 (0.83%), wk 44 408 (3.09%), wk 45 8 0.06%), wk 46 10 (0.08)
Slice administered wk 31 due to increased caligus in July 2023 leps have remained low.
A number of lethargic fish were observed in the pens inspected, some lesions were also noted. [Original PDF]

Case Number: 2024-0188

Download Mortality: SAL - Peak in mortality just after the visit last year, weeks 47 (1.76%), 48 (1.99%) and 49 (1.21%) due to AGD. After freshwater treatment mortality levels dropped well below reporting levels and have stayed low since then. Slight increase in mortality (but below reporting threshold) for week 24 2024 following the end of freshwater treatments. WRS - Monthly wrasse mortality has ranged between 1-7% per month since November 2023 with a peak in December 2023 of 403 fish. WRS recent monthly mortality: April - 235 fish, May - 130 and June (up to date of inspection) - 129 fish.
Sealice: Levels have been slowly rising since week 13 2024 (0.15) and reached 0.29 in week 21. Week 22 - 0.53, week 23 -
0.76 , week 24 - no count due to freshwater treatments and week 25 (after freshwater treatments) - 0.00
Treatments: Since November - 2 freshwater treatments. Most recent freshwater treatment 9-15th June.
Containment: Site are currently trialling bird pole top nets with a seal fence on pen 9. Trial has gone well and the site will implement these on all pens in the future.
During the physical inspection of the site, visibility into the pens was reduced due to the overcast conditions and dark water.
The fish observed were shoaling and appeared healthy. A good feed response was observed. Across the whole site only 4 floating mortalities and 2 moribund fish were observed.
The fish taken for VMD sampling had no lice and appeared healthy both externally and internally. [Original PDF]

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