Average female lice per fish

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Salmon Scotland mortality

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Cumulative mortality over full production cycle

Production cycle end date: Sep 2018
Total losses: 16 %

Production cycle end date: Jun 2020
Total losses: 28.6 %

Production cycle end date: Jul 2022
Total losses: 50 %

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Inspection reports

Case Number: 2021-0270

Download Cleanerfish Previous peak mortalities:
LUM- 2020: wk16, 3251, decomp and wounds; wk17, 4114, decomp, wounds, culled (1648); wk18, 2235,decomp, wounds, culled (756); wk19, 1493,decomp, wounds, culled (400). Dropping after wk17.
SAL previous peak mortalities:
2019 wk 40, 2.94%; wk41, 9.54%; wk42, 4.90%; wk43, 2.73%; wk44, 2.41% (post treatment morts)
Recent mortality:
LUM mortality: 2021 wk27, 197, decomp and wounds; wk28, 1277, decomp and wounds
SAL mortality: 2021 wk27, 2301, 0.34%; wk28, 2088, 0.52%;wk29, 2519, 0.38%, physical damage; wk30, 2849, 0.43%
WRS mortality: 2021 wk27, 53, wounds and fin damage; wk28, 85, wounds and fin damage; wk29- 814, mostly lumpfish
Sea lice- wk9 2020 , not reported over threshold
Concussion main cause of physical damage, looking to install bird poles to mitigate further damage.
Site uses environets, these seem to work well on the circle pens. A couple of pens had some warping of the handrail, this was reported to be due to completing swim-throughs when the temperatures were high, the plastic becomes slightly more maleable and when the weight of the wet net is supported on the handrail some warping occured. A trial of dyneema environets is ongoing with one pen fitted, the net is significantly lighter reducing strain on the pen structure.
The water was very clear allowing a good inspection of the stocks. Wrasse and lumpfish all appeared in good health. The salmon appeared very jumpy however no issues with lice are reported and the fish sampled had zero lice burden. Due to the issues with concussion the 'hamster' wheels are being replaced with bird poles.
Remote inspection conducted on the 29/07/2021 by and observed by . Site inspection conducted by on
05/08/2021. VMD sampling conducted by and observed by . [Original PDF]

Case Number: 2021-0541

Download The site was inspected following repeated reports of increased mortalities.
Slightly elevated background mortalities through the production cycle. Elevated mortalities recorded post bath treatments.
Mortalities above the reporting threshold have been recorded and reported to the FHI as required.
Mortalities above reporting threshold since last inspection Wk 38 1.27% 8142, wk 39 4.44% 27987, wk 41 1.36% 8146, wk 42
5.83% 34396, wk 45 1.13% 6232, wk 46 8.16% 44328.
Mortalities for the last four weeks: 55330 10.2%. Mainly attributed to AGD loses and physical damage post treatment. Seals have also been attributing to losses, this is most likely exacerbated due to moribund/lethargic fish, most recent week (47 total morts 1961/site 0.39%)
It is reported that the fish have been problematic since input with mortalities being recorded after crowding events. There was no issues with treatments but mortalities occurring post treatment.
On inspection of the site no moribund/lethargic fish were observed , visibility was reasonable so observations of stocks was good.
Extensive testing has been carried out by the company, gill health issues have been identified including Paranucleospora theridion, Branchiomonas cysticola, Gill poxvirus. Tenbaculum maritum was identified in samples taken from gill and kidney. [Original PDF]

Case Number: 2023-0058

Download Site currently holding approx. 300,000 fish for another site. These fish will be moved off in March/April and the remaining 6 pens will be split down to stock all 12 cages.
Yersinia ruckeri - antibiotics treatments just finished. Manager thinks this was brought about by stress of freshwater treatment
29th-31st December. Health surveillance Pharmaq report on 08/02/2023.
Antibiotic treatment was on the 9th February - Flofenicol In feed for 10 days. 500 degree day withdrawal period. Pens 1, 3, 5,
7, 9, 11. Morts have decreased but still remains an issue. Cage 7 was the worst due to freshwater issues when treating. Pen 2 and 6 haven't been treated. Product name - veterin 80.
ERM, RTFS, pasturella, furunculosis, IPN, - all fish on site vaccinated for.
SLICE 20th December - 27th December. Whole site treated. Recorded as 500 degree day withdrawal.
Peroxide bath treatment scheduled for next week for gill issues.
Ensiling system is new for this cycle - no movement off yet but will use Billy Bowie.
All lumpfish from Ocean matters. 22-27g Came in 13/10/22 and 12/01/2023.
Brand new seal pro nets this year with seal blinds.
Sealice treatment last cycle were Salmosan, SLICE, thermolicer, hydrolicer.
Paperwork inspected by , supervised by . VMD sampled by . Diagnostic F1,4 and 5 by , F2 and 3 by .
On inspection of pens approximately 10-20 moribund fish with popeye were observed in all pens except 2 and 6. Pen 7 had approximately 30 moribund fish observed.
Lumpfish mortality: Wk 4 - 1.51% (1421), Wk 5 - 2.71% (2506), Wk 6 - 3.07% (2630) and Wk 7 - 2.24% (1859) [Original PDF]

Case Number: 2023-0424

Download Inspection taking place following several mortality notifications since mid-July being over the reporting criteria. First mortality event reported for wk 28 at 1.01% (10.597 fish) and peaked at wk 33 at 5.24% (49,691 fish).
Recently mortality has reportedly been falling since wk 33. The mortality notification for wk 34 was down to 3.69% (33,209 fish).
Mortality has been attributed to multifactorial causes as PD, SAV, AGD, PGD, Pasturella skyensis and Rickettsia have all been identified on site. Caligus levels are reported to be rising at wk 30. Rickettsia being treated with florfenicol and is reported to be effective. A freshwater treatment has been carried out on 28/05 - 09/06 to deal with AGD and caligus. Another freshwater treatment was due to take place on the week of the inspection but has been postponed to reduce potential for physical damage following a successful antibiotic treatment
Pasteurella skyensis test positive from 07/08/2023. Fish vaccinated against this.
Antibiotics (florfenicol in-feed) used on site, finished on 22/08/2023 after a week long treatment.
Cage 2 mortality highest this summer (from Loch Ness). Loch Ness fish went to cages 2 and 6. Mortality in cage 6 is in line with other cages
Fish reportedly feeding well on week of inspection. Feeding has increased substantially since antibiotic treatment
At least one of the biologist team on site each week.
Fish from Loch Lochy and Loch Ness (both hatched in Loch Ailort)
Cages are 100m plastic circles
Background mortality is dealt with by ensiling. Due to increased mortality skips are being used currently. Two companies are used to dispose of increased mortality. One (J.A. MacDonald) takes mortality to Whiteshore Cockles and Dundas and the other (Billy Bowie) disposes of fish at Barkip and Dundas.
Peroxide treatment ended early on 11/08/23 as fish in cage 2 did not respond well to treatment and mortality increased. Water temperature at the time was about 15 degrees C.
Thermolicer treatment from 19/06 - 22/06 and 10/07 - 13/07 to deal with lice levels
Peroxide used on 17/7/23 and 11/07/23 both to treat for AGD
Alphamax treatment from 27/07 - 30/07 and 30/08/23 - 06/09/23 to treat rising Caligus levels
All lice treatments are reported to be successful.
Feed supply issues (caused by excessive heat where the feed was stored at the feed mill) meant that the fish ate less feed than planned for the 8 weeks before the inspection.
Farmed and wild wrasse on site. [Original PDF]

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