Site Details: Swining Voe 3
Lerwick
ZE1 0PX
Water type: Seawater
Cumulative mortality over full production cycle
Production cycle end date: Jul 2018
Total losses: 20.7 %
Production cycle end date: Sep 2020
Total losses: 28.7 %
Production cycle end date: Apr 2022
Total losses: 20.1 %
Production cycle end date: May 2024
Total losses: 33 %
Fish Health Inspectorate mortality
03/01/22-09/01/22
4,130
1.07%
31/01/22-06/03/22
15,382
4.1%
14/02/22-20/03/22
15,122
4.08%
21/02/22-27/02/22
4,358
1.34%
07/03/22-13/03/22
15,924
4.27%
21/03/22-27/03/22
1,893
1.19%
28/03/22-03/04/22
1,814
1.50%
24/04/23-30/04/23
6,576
1.10%
01/05/23-07/05/23
7,102
1.20%
25/03/24-31/03/24
4,225
1.30%
08/04/24-14/04/24
4,283
1.6%
15/04/24-21/04/24
5,294
2.5%
22/04/24-28/04/24
3,790
2.0%
29/04/24-05/05/24
2,383
1.60%
06/05/24-12/05/24
1,128
1.8%
Inspection reports
Case Number: 2020-0086
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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
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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
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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]