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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: Feb 2018
Total losses: 13.6 %

Production cycle end date: Oct 2019
Total losses: 40.7 %

Production cycle end date: Aug 2021
Total losses: 13.5 %

Production cycle end date: Feb 2022
Total losses: 15.5 %

Production cycle end date: Jan 2024
Total losses: 13.5 %

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Inspection reports

Case Number: 2020-0537

Download Site had experienced a drop in feed, health screening identified piscirickettsia, this was treated with Aquatet and mortalities attributed to this have dropped.
Feeding response has reportedly increased over the last few weeks and the stock displayed a good feeding response at time of inspection. 4 fish removed for VMD appeared healthy. 3 dead observed across site, not fresh dead therefore not sampled, these were removed by site manager during inspection.
Visibility was good at time of inspection, 5 dead observed across site, not fresh dead, therefore not sampled. 7 lethargic fish observed across site deeper in the water. With the exception of the 7 lethargic and 5 dead, the fish were shoaling well.
Site is stocked with wrasse and lumpfish, numbers have been increased on last cycle and now aiming for 7% stocking of cleaner fish. Cleaner fish are now fed from the barge through the same feeding system as salmon, may also reintroduce the feeding stations around the outside of cage if required.
Site has replaced the hamster wheel top net supports with poles around the cage. Site manager prefers these as it removes equipment from the water that the fish could damage themselves on.
Site hoping upgrade cages from 12 x 120m circles to 8 x 160m circles
Site utilises ROV mortality removal system, which reportedly works well, also capacity to use uplift system if required.
Following confirmation of piscirickettsia, the site has been operating separately from the other Mowi sites in area and not sharing staff or equipment. [Original PDF]

Case Number: 2021-0136

Download Fish were transferred onto site from Loch Lochy and Glenfinnan in April 2020. Stocking density has been significantly reduced this cycle.
Thermolicer treatment was completed last Wednesday (12th) and average sea lice numbers have dropped to below 0.15 for all stages.
Ensiled waste is collected by Billy Bowie and taken to Energen, Cumbernauld.
Site manager reported good health and has observed a high feed conversion rate within the stock on site.
Site has done both live and dead haul harvests this cycle.
Fish were sitting deep in the water and only 3 lethargic fish were observed across the site. On the fish that were observed, some physical damage was noted but fish were active and demonstrated a strong escape response.
Lumpfish mortality across the site for April was 4.4%. Lumpfish observed on site appeared to be in good health.
Very few wrasse observed across the site. Mortality for the month of April was 1.2%.
Fish sampled for VMD appeared healthy.
Paperwork inspected remotely on 19/05/2021. Site inspection completed on 25/05/2021. [Original PDF]

Case Number: 2021-0505

Download PSI conducted following reported increased mortality on site. PSI conducted by , shadowed by .
Recent mortalities
Week 43 - 13,645 Q4 fish at 3.57kg (2.44%)
Week 44 - 17,222 Q4 fish at 3.75kg (3.16%)
Week 45 - 7000 (~1.5%) so far - 90% are treatment related. Suspect peak was environmental insult on gills. Some CMS also reported. Vet report from 28/10/2021 - Gill anaemia and CMS suspected (fragile atrium and/or congestion distal intestine), seal damage, general congestion, poor performer, ERM suspected in one fish. 174 fish investigated in total. Samples collected and results from Patogen - 03/11/2021 - PMCV 4/4. Previous report from samples on 19/10 - negative for skyensis and Yersinia.
3/4 positive PMCV.
Mortality attributed to gill problems as well as CMS, 2 pens (2 and 10) responsible for significant share of mortality, harvesting these pens has commenced on site, both will be empty by end of the week. Site manager reported that mortality numbers at beginning of this week have improved. Wrasse mortality - 17% since stocking. Background mortality reported as pretty low - single figures normally, main mortality is due to treatment but also some Atypical furunculosis in last few weeks. Last few weeks wrasse mortality - wk 43 - 3.53%, wk 44 - 4.46%, wk 45 - 3.18%, wk 46 - 0.26%.
Other peaks in mortality (salmon):
Week 31 - 1,561 Q2 fish at 6.26kg (1.01%) gill disease
Week 32 - 4,199 Q2 fish at 6.43kg (2.75%) gill disease
Week 33 - 2,007 Q2 fish at 6.55kg (1.71%) gill disease
Mortalities attributed to microjellies. Site fallow on 24/08/2021
Week 36 - 15,715 Q4 fish at 2.88kg (3.27%) mortality in fish transferred from Loch Erisort
Week 37 - 11,918 Q4 fish at 2.86kg (2.02%) mortality related to fish recently transferred
Week 38 - 13,997 Q4 fish at 3.07kg (2.42%) mortality after thermolicer treatment
Sea Lice
Sea lice above CoGP levels from wb 14/06/2021 to wb 30/08/2021 and between wb 20/09/2021 to present.
Salmosan and physical treatments carried out to reduce the lice load.
Average adult females/fish above 2 in weeks 25 (2.06), 31 (2.39), 38 (2.75), 39 (3.88), 40 (2.61)
Average adult females/fish for the last 4 weeks: week 40 2.61, week 41 1.49, week 42 1.19, week 43 1.34.
8 cages stocked as of 13/11 as harvest ongoing. Another 90000 due to be harvested over next couple of weeks.
Stocked from Loch Erisort - 03/09/2021
Ensiled material collected to go to Energen.
3 or 4 pens treated with thermolicer following input. 10% wrasse input within 3 weeks of current stock.
Some AGD about - 19/10 AGD swabs - 16/19 positive - CT values from 23.56 - ~30.
FMA usually fallows synchronously but this year did not.
Salmosan treatment has been fairly effective - full site treated. Current numbers 1.7 Thermolicer due next Thursday. Probable gill treatment after that - H2O2 due to wrasse. Wrasse reported to be in good condition. [Original PDF]

Case Number: 2022-0578

Download 21/10 - gill treatment started and mortality started to flare up.
Stoffinfisker and Aquagen on site, both have experienced similar levels of mortality. Recent mortalities on site have been attributed to complex gill issues, Rickettsia and Moritella. Mortality is constant across the whole site, however pens 6, 9, and 3 appear to be worst affected.
Cleaner fish mortality - LUM - 182,756 - 100% main cause has been flavovirus - 86,614 mortalities recorded. <100,000 not recorded.
Wrasse mortality - 31,484 Since input across the site. Background mortality.
Additional information on lumpfish mortalities -
During the inspection it was found that the site had suffered 100% mortalities of their lumpfish since input. Of these 86,614 were recorded with cause and around 100,000 had not been recorded. This has been referred to the Animal and Plant Health
Agency, as they have responsibilty for welfare. As ~100,000 mortalities of lumpfish were not recorded, these were not reported to the FHI, or the company vet.
Only 3 cages inspected on site due to timing constraints.
Site thermometer used as case inspector's was unavailable.
Paperwork conducted by , observed by , Diagnostic sampling carried out by , supervised by . [Original PDF]

Case Number: 2023-0089

Download Remote inspection covering records carried out 08/03/2023. Site inspection completed on 14/03/2023.
Cleaner fish mortalities:
Wk. 7 - WRS @ 165 (1.3%) & LUM @ 1308 (2.49%)
Wk. 8 - WRS @ 178 (1.42%) & LUM @ 1490 (2.9%)
Wk. 9 - WRS @ 134 (1.08%) & LUM @ 740 (1.48%)
Wk. 10 - WRS @ 82 (0.67%) & LUM @ 825 (1.7%)
FMA not fallowed synchronously with other operator in the FMA but that operator is farming RTR and there is high amount co- operation and communication between both operators in area.
Fish remained low in the water so hard to see. Side netting goes down 16m into the water and then a further 13m to bottom of the cone. Only a small number (avg 3/pen) lethargic fish visible with the occasional one showing some physical damage. Once back at shorebase the fish were observed shoaling as expected via the cameras in the pens. Fish removed for vmd sampling were in good condition with no signs of disease upon external and internal examination. [Original PDF]

Case Number: 2023-0465

Download Current fish on site moved on from Maclean's Nose: wk33. Previous cycle fish were harvested and site was fallowed out in wk
31. 13/08/2023
Stock origin of fish: Loch Lochy, Ireland. Transferred to site from Maclean's Nose.
Cleanerfish mortality 2023 (recent 4 weeks):
Wrasse; Wk39, 4.96%, 2275; Wk38, 2.61%,1230; Wk37, 2.49%,1205;Wk36, 1.30%, 488 (attributed to furunculosis)
Lumpfish culled following harvest of fish from previous cycle in Wk31.
2/08/2023 - culled out the lumpfish.
Health visits: more swabs taken on 05/10/2023, AGD, 2/10 positive. Health checks conducted every 2 weeks.
Movement of fish from MacLean's Nose: first two deliveriesfish exhibited AGD. Pen 2 and 3 were experiencing higher levels of
AGD. Gentle peroxide treatment in the well but stopped immediately as temperature was too high. Mortality in wk 33 correspondes to this treatment loss. Risk assessment in place ( dated 11/08/2023) for transfer of fish from 13/08/2023 - inspected.
Site inspected on 11/10/2023 (7/8 stocked pens inspected) and two moribund fish removed for diagnostic sampling. F1 was observed to have many small, almost circular lesions on its flanks and operculum. F2 presented with very pale, grey gills. Due to weather, one pen was not inspected.
Pen 1 harvested out 11/10/2023. Plans to harvest pen 10 12/10/2023. movement records inspected: some harvests conducted via deadhaul. Either shipped to Larne or Blar Mhor from Oban pier. [Original PDF]

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