Site Details: Ouseness
Pierowall Westray
KW17 2DH
Water type: Seawater
Cumulative mortality over full production cycle
Production cycle end date: Aug 2018
Total losses: 13.7 %
Production cycle end date: Dec 2019
Total losses: 2.2 %
Production cycle end date: Nov 2020
Total losses: 0.7 %
Production cycle end date: Oct 2021
Total losses: 12.3 %
Fish Health Inspectorate mortality
04/04/22-10/04/22
20,954
5.86%
11/04/22-17/04/22
10,717
3.25%
18/04/22-24/04/22
17,495
5.48%
25/04/22-01/05/22
14,606
4.84%
02/05/22-08/05/22
7,245
2.52%
09/05/22-15/05/22
6,078
1.97%
14/11/22-20/11/22
3,943
3.02%
28/11/22-04/12/22
3,632
3.18%
05/12/22-11/12/22
1,801
1.63%
12/12/22-18/12/22
3,580
3.29%
19/12/22-25/12/22
2,396
2.28%
26/12/22-01/01/23
1,760
1.71%
09/01/23-15/01/23
3,528
3.51%
Inspection reports
Case Number: 2022-0101
Download
2022 S1: Wk 14, 27501, 7.70% (includes mortality that is related to post transfer mortality and is within 6 weeks). Most affected pens on site are pen 9,10 and 11.
Stock from Loch Garasdale. Only transferred onto site Wk 7 of 2022. Mortality has been above 1% even after 6 weeks post transfer. Stock was transferred onto site at 200-250g due to site having experienced a delay in fallowing and fish were ready for ongrowing. Ouseness is conducting organic production with no cleanerfish present on site.
Prior to transfer, fungus was observed in fish at Loch Garasdale. Fish are transferred on site by Migdale wellboats.
Site has access to ROV and conducts a yearly survey of the nets on site. In addition, mortality is removed/uplifted and checked with the 'Foover'.
Transfer of the fish occurred during stormy weather, including a long journey in the wellboat. This resulted in scrubbing of flanks of the fish into the pens. Fungus increased on these scaled areas. Mortalities began to increase and were attributed to the transfer journey. Further increases in mortality occurred and health visit on the 22/03/2022 from company vet team was conducted with histology and PCR samples sent for analysis. Histology returned with conclusion that primary skin trauma, with secondary bacterial ulceration and penetrating infection were the cause of mortalities. PCR samples came back negative. As mortalities continued to increase, most recent screening has been conducted (PCR) and samples were positive for moritella and Tenacibaculum maritimum. FHI conducted a diagnostic test on 17/05/2022.
4 fish were sampled during diagnostic test. All fish were found to possess lesions on flanks.
Remote inspection conducted by on 13/05/2022, supervised by .
Site inspection conducted by on 17/05/2022, supervised by . Diagnostic samples also taken on this date. Company vet accompanied the inspection. In addition, VMD samples were taken on 17/05/2022 by . [Original PDF]