Salmon Scotland mortality

Source

Inspection reports

Case Number: 2020-0194

Download MRT01540 (20/01/2020) - 20,484 (1.97% (reported), 3.86% from fishtalk) - Gill health and treatment losses.
Unreported mortality (24/02/2020) - 7,821 (1.31%) - Infection with Moritella viscosa, physical damage and poor performers.
Treated with Florfenicol the following week.
MRT01630 (04/05/2020) - 9,337 (2.24%) - Treatment losses - Optilicer
Mortality last 4 weeks:
W/b 13th April - 2,101 (0.5%), attributed to physical damage from treatments in previous weeks and poor performers.
W/b 20th April - 3,580 (0.84%), attributed to physical damage and poor performers.
W/b 27th April - 1,388 (0.33%), attributed to poor performers.
W/b 4th May - 9,447 (2.27%), attributed to physical damage from optilicer treatment.
Sea lice counts over 2 since last inspection:
Wk5 2020: 2.24
Wk6: 3.76
Wk7: 3.94
Wk8: 4.32
Wk9: Freshwater treatment conducted over a 3 week period.
Wk11: Fish were moved off to Loch Snizort East (FS1309) so no count conducted.
Wk12: 5.93
Wk13: Began H2O2 treatment, reduced lice load to 4.45
Wk14: Ongoing H2O2 treatment reduced lice load to 3.28
Wk15: 3.83
Wk16: 3.9 Optilicer arrived at Loch Snizort FS1309 (neighbouring site)
Wk17: 4.57
Wk18: 5.73 Optilicer arrived at Uig.
Wk19: Optilicer treatment began and lice counts dropped to 2.94.
Site manager reported that they had since come down further this week.
PSI conducted due to current COVID-19 lockdown restrictions preventing a site inspection. [Original PDF]

Source