Site Details: South Sound

c/o Blackness Pier
Scalloway
ZE1 0TQ
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: Apr 2018
Total losses: 12.7 %

Production cycle end date: May 2020
Total losses: 27.2 %

Production cycle end date: Mar 2022
Total losses: 19.5 %

Production cycle end date: Nov 2023
Total losses: 30.7 %

Source

Fish Health Inspectorate mortality

Date:
17/01/22-23/01/22
Mortality:
1,233
Mortality Rate:
1.3%
Reason given: Gill Health, maturation
Gill Health, maturation
Harvesting
Site due to be fallow by end of February.
Date:
14/02/22-20/02/22
Mortality:
1,169
Mortality Rate:
1.68%
Reason given: Complex Gill Disease and Maturation
Complex Gill Disease and Maturation
Site Harvesting to fallow
Complex Gill Disease confirmed in July as a result of numerous, prolonged spells of plankton blooms. Towards late Autumn to Winter, oxygen levels decreased and remained relatively low which delayed gill recovery. Site is due to be fallow by mid March.
Date:
21/02/22-27/02/22
Mortality:
1,503
Mortality Rate:
2.68%
Reason given: Complex gill disease, lesions, and lice damage
Complex gill disease, lesions, and lice damage
Site due to be fallow by mid-March FHI to monitor
Date:
28/08/23-03/09/23
Mortality:
4,978
Mortality Rate:
1.30%
Reason given: Environmental; Gill Health
Environmental; Gill Health
Low DO; aeration system installed
First report this cycle. FHI to monitor
Date:
04/09/23-10/09/23
Mortality:
7,012
Mortality Rate:
1.80%
Reason given: Environmental; Gill Health
Environmental; Gill Health
Low DO; oxygenation system in use
Business correspondent contacted. Site to be fallow by Wk 38. Second report this cycle. FHI to monitor.
Date:
11/09/23-17/09/23
Mortality:
6,351
Mortality Rate:
1.7%
Reason given: Environmental; Gill Health
Environmental; Gill Health
Low DO; oxygenation system in use
Slight reduction from previous report, FHI to continue to monitor
Date:
18/09/23-24/09/23
Mortality:
14,296
Mortality Rate:
3.80%
Reason given: Environmental; Gill Health
Environmental; Gill Health
Low DO; oxygenation system in use
Business contacted: On-going issue since the start of August. Increase in mortality since last notification in previous week. Issues caused by long term low DO in area. Only half the cages are affected and these have oxygenation systems installed. The worst affected cages are also being harvested out. Mortality rate for wk 39 (this week) is 1.1% so far. FHI visit scheduled. FHI to monitor.
Date:
25/09/23-01/10/23
Mortality:
4,976
Mortality Rate:
1.5%
Reason given: Environmental; bacterial
Environmental; bacterial
Low DO; destocking through harvest
Mortalities have decreased. FHI visit scheduled.
Date:
09/10/23-15/10/23
Mortality:
9,229
Mortality Rate:
4.70%
Reason given: Environmental; Gill Health related
Environmental; Gill Health related
Destocking through harvest
FHI to monitor.
Date:
16/10/23-22/10/23
Mortality:
20,316
Mortality Rate:
10.90%
Reason given: Environmental; Gill Health related
Environmental; Gill Health related
Harvesting to fallow by end wk 43, fallow by wk44.
Site fallow next week, no further action.
Date:
23/10/23-29/10/23
Mortality:
37,320
Mortality Rate:
23.0%
Reason given: Gill Health related
Gill Health related
Site fallow in wk 44
Site fallow no further action
Date:
30/10/23-05/11/23
Mortality:
3,989
Mortality Rate:
4.7%
Reason given: Gill Health related
Gill Health related
Site fallow in wk 44
Site fallow

Source

Inspection reports

Case Number: 2020-0059


Download Visibility poor at time of inspection due to wind and swell which were increasing throughout the inspection. Fish were deeper in the water, could be observed on camera system shoaling well. 2 dead observed across site. Two fish removed for VMD appeared in very good condition.
Lumpfish were stocked in Decemeber 2019, these did not appear to have had an impact on adult Lep numbers. Site had planned a physical treatment using the hydrolicer, however this was delayed due to weather and demand for the hydrolicer elsewhere. Numbers have been elevated since beginning of November 2019, recent hydrolicer treatment conducted 29 &
30/01/20, this has reduced sea lice counts but still above the reporting levels.
Fish showed good feeding response.
Mortalities are now disposed of to Pelagia rather than TWMA, this is the same for all SSF sites in Shetland, small volumes will go to Waste to Energy plant in Gremista.
No bath treatments conducted for sea lice this cycle. 4 SLICE treatments and physical treaments.
Lumpfish mortality ~2% per week [Original PDF]

Case Number: 2022-0571


Download Fish arrived on site 29th September. No waste transfers have occurred yet this cycle due to small size of fish that can be ensiled on site.
SLICE 7th-13th November due to increased number of caligus
Site changes to sapphire seal pro nets when fish get bigger.
Paperwork and inspection conducted by , supervised by . VMD taken by . [Original PDF]

Source