Site Details: Couldoran Incubation Unit

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

Fish Health Inspectorate mortality

Date:
05/12/22-11/12/22
Mortality:
1,159,752
Mortality Rate:
80.00%
Reason given: Stock Incident - inlet pipe became blocked and created a vortex, which supersaturated the comphatch water.
Stock Incident - inlet pipe became blocked and created a vortex, which supersaturated the comphatch water.
Remaining alevins culled as compromised with gas bubbles.
Business correspondent contacted for further info. Inlet pipe in dam has 2 screens on either side that are cleaned every day, however there is also an additional section underneath (2m down, hard to reach) which had became blocked by leaves. This caused the inlet pipe to draw air in through the compatches, causing gas bubble issues in the alevins. Before the next egg input is received at the end of January, a degasser will be added to the hatchery to avoid this issue in the future. No mortalities observed in the 70g smolts and their gills seem to have recovered fine from the incident.

Source

Inspection reports

Case Number: 2020-0097


Download Ferguson transport completing uplift of mortalities, records show disposal to Deerdykes and also Energen biogas.
Two inputs from Stofnfiskur. No issues to note.
A couple of dead ova observed in each tray in the comp hatch. [Original PDF]

Case Number: 2022-0139


Download Site went fallow on 29th April
Site and paperwork inspected on 12/05/2022 by , supervised by [Original PDF]

Case Number: 2024-0061


Download Site thermometer used for biosecurity reasons the thermometer calibrated every two years by the lab, checked regularly with hand held probe.
Native Hebridean stock on site.
Four inputs each year.
Peaks in mortality 2023 wk 39 26378 (2.15%) (issue with a blocked pipe one tray affected). 2024 wk 01 58605 (3.24%) water quality due to blocked pipe, wk 4 37694 (2.14%) water quality issue due to blocked pipe.
Morts last 4 weeks w9 9 153592 (9.22%) failed hatch, wk 8 15216 (0.91%)failed hatch, wk 7 3653 (0.22%), wk 6 Fallow.
Buffodiene the only treatment used on site. [Original PDF]

Source