Site Details: Lober Rock (SMH)

Orkney Regional Office
Scapa
Orkney
KW15 1SD
Operator: Scottish Sea Farms Ltd
Water type: Seawater

Average female lice per fish

Source

Salmon Scotland mortality

Source

Cumulative mortality over full production cycle

Production cycle end date: Oct 2021
Total losses: 7.8 %

Production cycle end date: Sep 2023
Total losses: 15.6 %

Source

Fish Health Inspectorate mortality

Date:
31/10/22-06/11/22
Mortality:
4,484
Mortality Rate:
2.80%
Reason given: Environment; Gill health Related
Environment; Gill health Related
CGD; post tarp peroxide treatment for AGD; FH diagnostic visit
First report this cycle. FHI to monitor.
Date:
10/07/23-16/07/23
Mortality:
3,394
Mortality Rate:
2.1%
Reason given: Virus disease
Virus disease
CMS; Destocking through harvest; First notification of the year. Clinical CMS observed ad site confirmed to be poistive for PMCV via PCRs (received Wk 28). Environmental stress exacerbated mortality (low DO in the area). Site plans to be fallow end of August/September 2023.
Business correspondent contacted for further information. FHI to monitor.
Date:
17/07/23-23/07/23
Mortality:
2,928
Mortality Rate:
1.8%
Reason given: Virus disease
Virus disease
CMS; Destocking through harvest
Business correspondent contacted for further information. FHI to monitor.
Date:
24/07/23-30/07/23
Mortality:
9,097
Mortality Rate:
6.20%
Reason given: Virus disease
Virus disease
CMS; Destocking through harvest; business contacted - possible fallow by End of September
FHI visited 14/6/23, prior to start of mortality reports. FHI visit scheduled.
Date:
21/08/23-27/08/23
Mortality:
1,134
Mortality Rate:
1.40%
Reason given: Virus Disease
Virus Disease
CMS; Destocking through harvest
Site visit conducted 15/08/2023 (case number: 2023-0358). Due to the observation of moribund fish and clinical signs of disease samples were taken for diagnostic purposes. Changes consistent with hyperplasic branchitis and CMS observed. SAV also identified. FHI to monitor
Date:
28/08/23-03/09/23
Mortality:
858
Mortality Rate:
1.40%
Reason given: Environmental; Virus disease
Environmental; Virus disease
Low DO; CMS; Harvesting to fallow
Site visit conducted 15/08/2023 (case number: 2023-0358). Diagnostic samples taken. Changes consistent with hyperplasic branchitis and CMS observed. SAV also identified. Due to fallow this month. FHI to monitor
Date:
04/09/23-10/09/23
Mortality:
978
Mortality Rate:
1.60%
Reason given: Environmental; Virus disease
Environmental; Virus disease
Low DO; CMS; Harvesting to fallow
Business correspondent contacted. Site to be fallow by 17/09/2023 (end of Wk37). FHI to monitor.

Source

Inspection reports

Case Number: 2020-0515


Download Case paperwork completed by on 24/11/2020.
Fish brought on site wk 51 2019. Increase in morts wk 12, 2020 (3854, 1% - below reporting level) due to physical damage from storms. Mortalities immediately dropped back to 0.1% wk 13.
VMD sampling by 26/11/20. Fish sampled at pier next to shorebase due to company H&S COVID-19 policy and concerns regarding movement from a higher tier to lower tier. Fish brought ashore by site staff, all fish appeared healthy. Site inspection re-scheduled for 2021 Q1. No issues reported on site. [Original PDF]

Case Number: 2021-0049


Download Mortality recorded for Wk 20 - 0, due to workboat being unavailable due to being in dry dock and weather.
Paperwork completed remotely by , observed by 18/06/21, Site inspection 22/06/21 by , shadowed by
One fish removed for VMD appeared healthy and in very good condition, sampled by .
Due to issue with net washer (awaiting part from Norway), there is increased grow on nets, especially top 2m, it was reported that a net wash company were going to be employed to help stay on top of the growth.
Good visibility at time of inspection, fish were deeper in the water and showed good shoaling behaviour.
Three dead observed across site, one moribund observed, but nearer the middle of the cage. [Original PDF]

Case Number: 2023-0249


Download Fish came on from Barcaldine and have been performing well this cycle.
Thermolicer is over on Hunda this week but is scheduled at Lober Rock next week and this is the last time the site is hoping to handle the fish before the site is fallowed in August.
3 Slice treatments at the beginning of 2022, followed by Azasure in May 22 and Paramove in July/September 22. Only freshwater treatmemts at the site so far in 2023.
Management area is not fallowed synchronously on a single year class basis. Risk assessment has been developed. This was inspected and found to be adequate.
Background CMS and HSMI have been detected on the site but are not causing mortalities.
Fish on site appeared in good health and were actively shoaling in the cages. <5 moribunds were observed across the site and were removed during the inspection and humanely culled.
Some fish were removed and aneasthetised for health checks during the inspection. Gills appeared in good health and very few lice were observed on the fish.
Fish removed for VMD sampling appeared in good external and internal health and demonstrated a strong feed response. [Original PDF]

Case Number: 2023-0358


Download Site was re-visited following consecutive weeks of increased mortality. Salmon came on from Barcaldine Smolt Unit (FS1328) and had been performing well this cycle up until wk28 2023.
CMS and HSMI had been detected at the site earlier in the year but were not causing significant increases in mortality at that time. CMS, combined with environmental stress (low DO and presence of microjellies) has since been attributed to the cause of the increased mortality in wks28, 29 and 30.
Site is destocking through harvests and site will be fallow by the end of August/beginning of September 23. [Original PDF]

Source