Site Details: West of Burwick
Lerwick
ZE1 0PX
Water type: Seawater
Cumulative mortality over full production cycle
Production cycle end date: Sep 2019
Total losses: 35.8 %
Production cycle end date: Jun 2021
Total losses: 13.9 %
Production cycle end date: Aug 2023
Total losses: 37.1 %
Fish Health Inspectorate mortality
24/10/22-30/10/22
2,440
1.10%
13/02/23-19/02/23
3,787
1.10%
06/03/23-12/03/23
3,774
1.20%
22/05/23-28/05/23
2,470
1.10%
26/06/23-02/07/23
2,654
1.7%
03/07/23-09/07/23
6,948
4.50%
17/07/23-23/07/23
4,132
2.9%
24/07/23-30/07/23
6,157
4.40%
31/07/23-06/08/23
8,579
6.40%
07/08/23-13/08/23
5,433
4.30%
14/08/23-20/08/23
5,420
5.60%
21/08/23-27/08/23
1,160
1.70%
Inspection reports
Case Number: 2020-0338
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Mortalities have been very low throughout cycle since stocking. Monitored daily by camera.
Sea lice counts very low. Sea lice skirts were in place prior to stocking and just recently removed. Two slice treatments administered one in April and one in July - July treatment due to slight rise in Caligus numbers observed. A wellboat bath treatment with salmosan also conducted for gill health and sea lice, a few leps observed and caligus. 100% clearance after treatment and improvement in gill health. Company generally favour freshwater for sea lice treatments, however other methods are available - chemotherapeutants and optilicer. Details of decision making process for choosing intervention not written into sea lice management plan - to look further into this.
Predator nets and top nets in place - no predator issues.
All records except movement records inspected by remotely.
Site inspection and sampling by
Fish sampled for VMD appeared healthy, site manager reported that gill health had imporved on previous so far. Fish reportedly growing well. FW treatments have been working well and site have been conducting these at lower stocking densities. [Original PDF]
Case Number: 2022-0568
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Last transfer of fish onto site was on 13/11/2022 from Setter Voe.
Half of site is stocked from Setter Voe and the other half from Migdale.
Only a couple or moribunds across whole site.
Mortalities are usually ensiled on site. Small, amounts picked up by SEM, larger mortalities are handled by Pelagia.
Site inspection and paperwork conducted by , supervised by . VMD samples taken by [Original PDF]