Site Details: Couldoran Hatchery

Couldoran
Kishorn
IV54 8UY
Operator: Bakkafrost Scotland
Water type: Freshwater

Fish Health Inspectorate mortality

Date:
01/05/23-07/05/23
Mortality:
68,251
Mortality Rate:
3.09%
Reason given: Fungus
Fungus
Aquasen/Cress
First report this year. Fungal infection is being treated and are reported to have been effective. However elevtaed mortalities above the reporting threshold persisted into wk19. FHI to monitor.
Date:
08/05/23-14/05/23
Mortality:
66,061
Mortality Rate:
3.09%
Reason given: Fungus
Fungus
Treatments with Aquasen/Cress
Mortalities same as last week, just over reporting threshold of 3%. FHI to continue to monitor as treatments continue.
Date:
15/05/23-21/05/23
Mortality:
98,988
Mortality Rate:
4.77%
Reason given: Stock Incident
Stock Incident
Prior fungus challenge now clear; Monitoring ongoing
Mortalities have increased from previous week. The biology team are currently investigating recent mortality. FHI to monitor.
Date:
22/05/23-28/05/23
Mortality:
97,494
Mortality Rate:
4.96%
Reason given: Development
Development
Monitoring and diagnosis ongoing
Contacted site manager, deterioriation of the kidney noted in multiple histo samples, pcr/virus testing reported nothing significant. Suspect nutritional issue the cause. Number of mortalities has reduced significantly but were still elevated w/b 29/5/2023 although below the reporting threshold 2.79%. FHI to monitor.

Source

Inspection reports

Case Number: 2020-0096


Download Fish had been recently treated with formalin and Cress.
On inspection of the site no clinical signs of disease noted. [Original PDF]

Case Number: 2021-0480


Download RAS opened in July, vaccination caused some damage to fish increasing the number of fungal treatments undertaken.
Stofinfiskur eggs seem susceptible to fungus
Loch damph: August S1 crop cull due to unvaccinated fish
As of end 2022 or 2023 hatchery will be self sufficient in egg production for S0s. Currently importing S0s from stofinfiskur.
Site temperature used for biosecurity.
Site inspection carried out by , observed by . [Original PDF]

Case Number: 2022-0138


Download Currently treating for saprolegnia using formalin in RAS facility
Mortality peaks due to fungus and first feeding mortalities. No peaks above reporting threshold.
Site thermometer used for biosecurity
Site and paperwork inspected on 12/05/2022 by , observed by
Observed a small number of fish with fungus on the tail. This was reported to be caused by grading. [Original PDF]

Case Number: 2024-0060


Download Issues with stock in April following a change in feed, poor growth and increased mortalities were reported, disease screening was conducted no significant pathogens identified. This continued through May with elevated mortalities reported. The fish were transferred to a new diet by the end of May with mortalities reducing.
ERM was identified during June 2023, a second dip vaccination was administered and issue resolved without further treatment though July.
Recirc unit is at 11.5 degrees, remaining tanks at 11.9 degrees. site thermometer used for biosecurity, thermometers are calibrated by biology department, also hand held probe used to calibrate as well.
Peaks in mortality 2023 wk 9 2643 (1.24%) Fungus, wk 17 13641 (0.97%), wk 18 66599 (4.77%), wk 19 72492 (5.45%), wk 20
96736 (7.96%), wk 21 (95941 (8.26%), wk 22 51208 (4.81%),
Mort last four weeks wk 10 828 (0.03%), wk 9 3599 (0.14%), wk 8 8762 (0.33%), wk 7 5978 (0.23%) mainly first feeding poor doers. [Original PDF]

Source