Average female lice per fish

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Salmon Scotland mortality

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Cumulative mortality over full production cycle

Plocrapool Production cycle end date: Jun 2019
Total losses: 25.3 %

Plocrapool Production cycle end date: Feb 2021
Total losses: 56.2 %

Plocrapool Production cycle end date: Jul 2024
Total losses: 22.3 %

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Inspection reports

Case Number: 2020-0499

Download Lumpfish came onto site from Otterferry over 2 inputs. 1st input october 2019, 2nd input April 2020.
Mortality over 1% since input:
30/3 - 1.86% - Treatment combined with PD and CMS
21/9 - 1.32% - Treatment combined with PD and CMS
05/10 - 3.97% - Treatment combined with PD and CMS
12/10 - 5.21% - Treatment combined with PD and CMS
Site has begun selective harvest. 4 cages harvested out over the last couple of weeks to reduce biomass on site. Remaining cages were split to reduce stocking density in each.
Site is also conducting prophylactic treatments for sea lice.
Live haul harvests taken to Arnish processing plant.
Numerous moribunds observed in almost every cage across the site. Many fish were displaying lesions, physical damage and were hanging around at the surface.
Site used a thermolicer earlier in the cycle, however experienced large mortalities suspected to have been linked to the presence of CMS in the population in combination with the stress of the treatment. Fish seem to be responding better to hydrolicer treatments.
Site not due to be fallow until summer next year, however, due to the poor health of stock on site, the site manager explained that it is highly likely the site will be harvested early and will likely be fallow by the end of this year/beginning of next year.
Site thermometer used as inspectors requires re-calibration.
Fish sampled for VMD appeared healthy and had a good feeding response. [Original PDF]

Case Number: 2022-0012

Download Mortality information 2021 wk 1 - 2218 - 1.15% wk 2 6927 - 3.64% wk 3 1869 - 1.83% wk 4 - 3051 - 4.16% wk 5 end of cycle - fallow.
2021 lice numbers wk 1 - 1.46 wk 2 - 3.25 wk 3 - 2.19 wk 4 - 1.33
Lumpfish mortality wk 44 2020 - 32 258 - 100% - End of cycle -blackloss
Last 4 weeks - wk52 - 825 (2.39%) - Wk1 - 626 (1.85%) wk2 - 509 (1.54%) wk3 - 2633 (8.07%)
Fish were feeding deep making collection of VMD samples difficult. Fish that were observed seemed healthy and in good condition. [Original PDF]

Case Number: 2022-0446

Download Site has been reporting mortalities for ~6 weeks. First reports of mortality above 1% were attributed to bacterial disease, with 2 pens testing positive for Furunculosis. Gill health and anaemia became primary cause of mortality on site second week, with freshwater treatments scheduled to aid gills. Last treatment on site was extended 3hr FW treatment.
Pasturella and Furunculosis confirmed by internal diagnostic sampling on 19/09 and 18/08 respectively. In addition, low level
CMS also found. Pen 6 has highest mortality. During site inspection, few fish seen with open lesions. No fish that did possess open furuncle like lesions were sampled as they were not able to be caught.
Gills observed during site sampling inspection were found to be in poor condition and clearly anaemia was present in sampled fish too. Feeding rates on site were low across the board. Lice burden was observed to be low on site.
All fish sampled were lethargic with all being moribund also.
Lumpfish mortality as below from Wk 7 2022:
Wk41, 9159, 99.71% (FW treatment related)
Wk31,1231,10.75% (Mechanical treatment and black losses)
Wk30, 1335, 10.44% (Mechanical treatment related)
Wk18, 2669,13.04% (FW treatment related)
No wrasse or lumpfish on site during site inspection on the 19/10/2022. [Original PDF]

Case Number: 2022-0446

Download Site has been reporting mortalities for ~6 weeks. First reports of mortality above 1% were attributed to bacterial disease, with 2 pens testing positive for Furunculosis. Gill health and anaemia became primary cause of mortality on site second week, with freshwater treatments scheduled to aid gills. Last treatment on site was extended 3hr FW treatment.
Pasturella and Furunculosis confirmed by internal diagnostic sampling on 19/09 and 18/08 respectively. In addition, low level
CMS also found. Pen 6 has highest mortality. During site inspection, few fish seen with open lesions. No fish that did possess open furuncle like lesions were sampled as they were not able to be caught.
Gills observed during site sampling inspection were found to be in poor condition and clearly anaemia was present in sampled fish too. Feeding rates on site were low across the board. Lice burden was observed to be low on site.
All fish sampled were lethargic with all being moribund also.
Lumpfish losses as below from Wk 7 2022:
Wk41, 9159, 99.71% (black losses)*
Wk31,1231,10.75% (Mechanical treatment and black losses)
Wk30, 1335, 10.44% (Mechanical treatment related)
Wk18, 2669,13.04% (FW treatment related)
No wrasse or lumpfish on site during site inspection on the 19/10/2022.
*Cause of mortality was amended following discussions with the business. Initially cause was recorded as FW treatment losses but corrected to black losses on 06/07/2023. The black losses were observed at the time of a freshwater treatment, where fewer than expected number of lumpfish were observed, rather than the losses being directly associated with the FW treatment conducted. [Original PDF]

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