Site Details: Millburn

Burnhouse
Lyness
Orkney
KW16 3NU
Operator: Millburn Salmon Hatchery
Water type: Freshwater

Fish Health Inspectorate mortality

Date:
01/05/22-31/05/22
Mortality:
71,053
Mortality Rate:
50.00%
Reason given: RTFS
RTFS
Treatment with Florocol prescribed by FVG.
Mortality picked up during routine inspection. No further action required.

Source

Inspection reports

Case Number: 2020-0526


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Site not inspected. Fish for vmd sampling were collected by site contact and dropped off at Cooke shorebase at Lyness (Hoy) on 01/12/2020.
Fish have not had any treatment while on site so not in withdrawal but fish removed for vmd sampling were euthanised with
TMS. Fish looked in good condition with no clinical signs observed and no gross pathology observed when examined during sampling.
Photo's of movement records emailed through and issue raised with site contact that the site number of source/ destination was to be recorded for all future movements on and off site. [Original PDF]

Case Number: 2021-0367


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Flavobacterium diagnosed in the stock in June 2021, 4750 in tank 1 and 4119 in tank 1 for the month, florocol administered
8/6/21 and the 24/6/2021, treatment was effective and morts reduced however an additional dose was administered in
September (currently in withdrawal) due to a increase in tank 3.
Paperwork completed by , VMD sampling by . [Original PDF]

Case Number: 2022-0213


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Morts transported to Cooke by manager for disposal.
Last month the fish had a bacterial infection which was treated with a 10 day course of Florocol. Withdrawal for these fish is double normal withdrawal period due to organic status.
Water temperature 11.2 degrees using site thermometer.
Manager thinks fish are susceptible/weak due to the fluctuations in daily temperatures. For example, on day of site visit the morning the water temperature was 8.5 degrees and by 11am it had risen to 11.2 degrees.
Manager had stated higher mortalities just before the last batch of fish were taken off site as they were delayed by 3 weeks due to Cooke not being ready for delivery of fish. Due to this delay he also went above biomass constraints.
A couple or morts seen in the tank. Fish observed appeared healthy.
Site paperwork and inspection carried out by , supervised by .
Missing paperwork was received 20/09/2022 so issues raised are now resolved. [Original PDF]

Case Number: 2022-0437


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Infection with Flavobacterium (RTFS) in May 22 resulted in significant mortalities across the site (71,053 fish lost during the month of May). FVG were consulted and prescription provided for Florocol 19/05/22 - 29/05/22.
Fish haven't yet been counted since the mass mortality occurred in May so site manager is unsure of the exact count. Fish are being graded in November when they are vaccinated with PD1 and Alphaject6 so an accurate count will be available at this time.
Site manager only records mortality count over the month and doesn’t calculate weekly mortality percentages. As a result, the mortality event in May, which resulted in a loss of almost 50% of the stock at the time, was not reported as required. This was discussed with the site manager at the time and he has agreed to record weekly mortality percentage going forward.
During the site inspection, 1 mortality and 1 moribund were observed across the site.
Fish taken for VMD sample appeared healthy both externally and internally.
Siter thermometer used to minimise biosecurity risk.
Paperwork and site inspected by , supervised by . VMD sampled by . [Original PDF]

Case Number: 2022-0437


Download
Infection with Flavobacterium (RTFS) in May 22 resulted in significant mortalities across the site (71,053 fish lost during the month of May). FVG were consulted and prescription provided for Florocol 19/05/22 - 29/05/22.
Fish haven't yet been counted since the mass mortality occurred in May so site manager is unsure of the exact count. Fish are being graded in November when they are vaccinated with PD1 and Alphaject6 so an accurate count will be available at this time.
Site manager only records mortality count over the month and doesn’t calculate weekly mortality percentages. As a result, the mortality event in May, which resulted in a loss of almost 50% of the stock at the time, was not reported as required. This was discussed with the site manager at the time and he has agreed to record weekly mortality percentage going forward.
During the site inspection, 1 mortality and 1 moribund were observed across the site.
Fish taken for VMD sample appeared healthy both externally and internally.
Siter thermometer used to minimise biosecurity risk.
Paperwork and site inspected by , supervised by . VMD sampled by
CNI case type was added to case sheet and FHR was re-issued - 12/01/23 [Original PDF]

Source