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Inspection reports

Case Number: 2021-0577

Download Mortalities are incinerated on site, but also use Billy Bowie skips once fish are larger, slips available from previous cycles.
No dead or moribund observed at time of inspection. Fish were shoaling deeper in the water, cages that were feeding showed a good feed response. No issue observed or reported at time of inspection. Site stocked in Sept 2021.
Net washing ongoing at time of inspection. Divers had been on site the day before the inspection, but were weathered off, booked to return the following week to complete mortality removal, mortalities low since input and fish have reportedly come on well since arriving on site.
Weather very calm and visibility good at time of inspection. [Original PDF]

Case Number: 2022-0262

Download Treatment Timeline:
Wk 9- thermolicer treatment (all pens)
Wk 12- thermolicer treatment (all pens)
Wk 17- thermolicer light treatment (all pens)
Wk24- light thermolicer treatment (all pens)
Wk 27- hydrolicer 10/12 pens
W/b 11/07/2022- hydrolicer remaining two pens
Mortality events:
Wk 19- 2.7%, 12191; following thermolicer treatment in wk 17
Wk20- 2.1%, 9032; continuation of previous week mortality
Wk21- 1.3%, 5429
Wk24- 1.6%, 6826; following thermolicer
Wk25- 2%, 8175
Wk26- 4%, 15943
Wk27- 3.8%, 14441
Inspection of site was conducted in conjunction with APHA, following 3 weeks of notifications of increased mortality above the threshold, as well as a response to investigate claims of a welfare complaint.
Stocking of wrasse on site 24/06/2022; wild caught from Orkney.
Timeline of recent disease:
Routine vet visit conducted in week 9, confirmed PRV +ve results for the whole site (100%), but no increased mortality associated with it seen on site. In Wk 14, histology again confirmed PRV +ve site with moderate levels, and slight increase in mortality seen but still below reporting threshold. Skin lesions seen on site were tested and were found to be a result of secondary bacterial infection; bad weather earlier in the year had affected the fish previously. P. skyensis was tested for during diagnostic taken in Wk 15 but result were negative and mortality remained below reporting threshold until wk 18. Wk 19 samples were positive for furunculosis (5/5). No moribunds were seen at vet visit in Wk 21. As mortality increased from Wk 24- present, PCR samples continued to be positive for furunculosis in Wk 25. As a result, decision to remove leading mort pens through harvest, and as of 18/07/2022 site is potentially fallowing within next 3 weeks. Next pens to harvest out are pen 7, 9 and 11. Site has been using diet with supplementary health ingredients called Assit Skin with Resist Lice from 5th to 25th May.
Presently, fish are on Resist lice diet.
Observations on site:
From the first pen, moribunds were observed exhibiting exothalmia and lethargy. Two pens in particular were observed to have the highest mortality; pen 9 and 11, with ~20 moribunds seen upon pen inspection. Fish removed from pen 1 for diagnostic purpose were observed to have enlarged atriums of the heart, and some moderate petechial haemorrhaging on the liver too.
Raised scales or ‘furuncle-like' bubbles were also seen in sampled fish from pen 1 and 9. Upon observation of pens 4 and 6, fish were seen with more such skin lesions/boils, none of which were observed to be open or ruptured. Lastly, a few fish were observed to be belly up approx. 3-4m below the water surface hanging on the side of the net. [Original PDF]

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