Site Details: Swining Voe 3

Gremista
Lerwick
ZE1 0PX
Operator: Scottish Sea Farms Ltd
Water type: Seawater

Average female lice per fish

Source

Salmon Scotland mortality

Source

Cumulative mortality over full production cycle

Swining 3 Production cycle end date: Jul 2018
Total losses: 20.7 %

Swining 3 Production cycle end date: Sep 2020
Total losses: 28.7 %

Swining 3 Production cycle end date: Apr 2022
Total losses: 20.1 %

Swining 3 Production cycle end date: May 2024
Total losses: 33 %

Source

Fish Health Inspectorate mortality

Date:
03/01/22-09/01/22
Mortality:
4,130
Mortality Rate:
1.07%
Reason given: Viral Disease
Viral Disease
CMS
Site recently acquired by SSF from Grieg. Mortality attributed to high viral load of CMS. First report since 2020. FHI to monitor.
Date:
31/01/22-06/03/22
Mortality:
15,382
Mortality Rate:
4.1%
Reason given: Viral Disease / Sea Lice Related
Viral Disease / Sea Lice Related
Harvesting
Increased mortalities due to CMS, site has completed targeted biomass reduction but will continue harvesting but no fallow date has been set. The current weeks mortality rate was reported to be les than previous weeks. A weekly mortality event was also submitted for the w/b 28/2/2022, this was 1.42% (3239). This was not recorded seperatel;y as it is covered by this five week notification.
Date:
14/02/22-20/03/22
Mortality:
15,122
Mortality Rate:
4.08%
Reason given: Viral Disease
Viral Disease
Mortality from CMS. Site is currently harvesting with a predicted fallow date of 11/04/2022.
FHI to monitor.
Date:
21/02/22-27/02/22
Mortality:
4,358
Mortality Rate:
1.34%
Reason given: Viral Disease / Sea Lice Related
Viral Disease / Sea Lice Related
Date:
07/03/22-13/03/22
Mortality:
15,924
Mortality Rate:
4.27%
Reason given: Viral Disease / Sea Lice Related
Viral Disease / Sea Lice Related
Site is currently harvesting. Sea lice burden has decreased in recent weeks.
FHI to monitor
Date:
21/03/22-27/03/22
Mortality:
1,893
Mortality Rate:
1.19%
Reason given: Viral Disease
Viral Disease
Site currently harvesting.
Mortality caused by CMS. Site due to fallow by 06/04/2022. FHI to monitor.
Date:
28/03/22-03/04/22
Mortality:
1,814
Mortality Rate:
1.50%
Reason given: Viral disease
Viral disease
Site is now fallow - No further action
Date:
24/04/23-30/04/23
Mortality:
6,576
Mortality Rate:
1.10%
Reason given: Predation by seals
Predation by seals
First notification of this mortality event. Fish appear clinically healthy although background moritella has been identified. Seals riding waves over the hand rail to gain access. No damage to nets has occurred. FHI to monitor
Date:
01/05/23-07/05/23
Mortality:
7,102
Mortality Rate:
1.20%
Reason given: Predation by seals
Predation by seals
Double tied top net to rail to further increase security
Routine FHI visit scheduled. FHI to monitor
Date:
25/03/24-31/03/24
Mortality:
4,225
Mortality Rate:
1.30%
Reason given: Virus disease
Virus disease
CMS; Destocking through harvest
FHI to monitor.
Date:
08/04/24-14/04/24
Mortality:
4,283
Mortality Rate:
1.6%
Reason given: Virus disease
Virus disease
CMS; Destocking through harvest
FHI to monitor.
Date:
15/04/24-21/04/24
Mortality:
5,294
Mortality Rate:
2.5%
Reason given: Virus disease
Virus disease
CMS; Destocking through harvest
FHI to monitor.
Date:
22/04/24-28/04/24
Mortality:
3,790
Mortality Rate:
2.0%
Reason given: Virus disease
Virus disease
CMS; Harvesting to fallow
FHI to monitor.
Date:
29/04/24-05/05/24
Mortality:
2,383
Mortality Rate:
1.60%
Reason given: Virus disease
Virus disease
CMS; Harvesting to fallow. Business contacted: Weather permitting site hoping to fallow by the end of May 2024.
Business contacted for information on sites fallowing. FHI to monitor.
Date:
06/05/24-12/05/24
Mortality:
1,128
Mortality Rate:
1.8%
Reason given: Virus disease
Virus disease
CMS; Harvesting to fallow. Business contacted previously: weather permitting site hoping to fallow by the end of May 2024.
FHI to monitor.

Source

Inspection reports

Case Number: 2020-0086


Download MRT01601 (06/04/2020) - 5,158 (1.28%) - 2019 S1 - Physical damage following mechanical lice treatment. Harvesting to begin soon.
MRT01629 (04/05/2020) - 10,708 (2.85%) - 2019 S2 - Treatment losses / CMS
Mortality last 4 weeks:
W/b 13th April: 2,478 (0.62%) - attributed to CMS (affecting entire site however cages 2 and 3 are experiencing more mortalities from this)
W/b 20th: 3,458 (0.88%) - CMS
W/b 27th: 2,407 (0.62%) - CMS
W/b 4th May: 10,708 (2.85%) - Losses after freshwater treatment/crowding/stress.
Mortalities reduced the following week and sea lice numbers have also reduced.
Sea lice weekly counts over 2 since August:
Wk39: 3.3
Wk40: 3.85 followed by a freshwater treatment, lice load was reduced to below 1.
Wk46: 3.66 followed by a physical treatment, lice load was reduced to below 1.
Wk51: 3.6 followed by a physical treatment, lice load was reduced to below 1.
Wk4: 5.4 followed by a physical treatment, lice load was reduced to below 1.
Wk8: 2.95
Wk9: 2.5 followed by a physical treatment, lice load was reduced to below 1.
Wk15: 2.53
Wk16: 5.22 followed by a freshwater treatment, lice load was reduced to below 1.
Site receives fish input from Girlsta Hatchery FS0504.
Site due to begin harvesting at the beginning of June 2020. The site is expected to be fallow by the middle of July.
Site currently only doing dead haul harvests.
PSI completed due to COVID-19 lockdown restrictions preventing a site inspection. [Original PDF]

Case Number: 2021-0250


Download Ownership of site about to change so uncertain regarding next input date.
Seal predation, biting fish through net but no equipment damage.
No mention on FMS that the area is stocked with a single year class but stated in VHWP.
Remote inspection on 14/07/21 done by , observed by
Physical inspection and VMD sampling carried out by observed by .
Fish looked healthy and were behaving normally, no dead fish observed. Less than one fish with physical damage observed per pen. No sea lice seen on the fish sampled for the VMD, no clinical signs observed. [Original PDF]

Case Number: 2023-0370


Download Only 3 pens currently stocked with locally caught wild wrasse but remaining pens will be stocked in the coming months.
Weights range from 22g to 336g. Wrasse first brought on site week 34 (21/08) 2023.
Stock on site looking in good condition with only 1 lethargic fish observed. Fish removed for vmd sampling showed no clinical signs of disease or gross pathology.
Three pieces of information found to be missing from the FMS:
Circumstances under which biological controls and cleanerfish are to be used.
Dates by which the area or individual farm will be fallow and the earliest date when a farm or area may be restocked.
Whether one or more year classes may be stocked onto sites covered by the agreement or statement.
This information was however available in the sites VHWP and husbandry manual. [Original PDF]

Source