Site Details: North Papa
Lerwick
ZE1 0PX
Water type: Seawater
Cumulative mortality over full production cycle
Production cycle end date: Aug 2019
Total losses: 35.3 %
Production cycle end date: Aug 2021
Total losses: 11.8 %
Production cycle end date: Aug 2023
Total losses: 41.3 %
Fish Health Inspectorate mortality
06/06/22-12/06/22
13,969
1.90%
21/11/22-27/11/22
7,792
2.20%
28/11/22-04/12/22
23,524
7.30%
05/12/22-11/12/22
4,966
1.70%
13/03/23-19/03/23
4,457
1.60%
20/03/23-26/03/23
6,487
2.30%
27/03/23-02/04/23
4,219
1.6%
03/04/23-09/04/23
4,003
1.50%
17/04/23-23/04/23
3,664
1.5%
24/04/23-30/04/23
4,651
1.90%
01/05/23-07/05/23
4,195
1.70%
08/05/23-14/05/23
5,179
2.20%
15/05/23-21/05/23
6,437
2.7%
22/05/23-28/05/23
6,757
3.00%
29/05/23-04/06/23
5,145
2.3%
05/06/23-11/06/23
2,892
1.30%
12/06/23-18/06/23
2,824
1.3%
19/06/23-25/06/23
5,863
2.70%
26/06/23-02/07/23
5,088
2.4%
03/07/23-09/07/23
3,588
1.70%
10/07/23-16/07/23
2,963
1.8%
17/07/23-23/07/23
3,502
2.5%
24/07/23-30/07/23
2,374
2.00%
31/07/23-06/08/23
2,596
2.40%
07/08/23-13/08/23
1,616
1.50%
14/08/23-20/08/23
1,248
1.20%
Inspection reports
Case Number: 2021-0226
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Slight CMS onsite, fish are being harvested and those pens with higher mortality have been harvested first so mortality has remained low.
Company policy has been to limit cleaner fish use due to health concerns for the cleanerfish.
Company operates at a treatment trigger level of 0.1 AF. 14/07/21 - 2.8 AF, reported. Site currently being harvested.
Paperwork carried out 15/07/21 by observed by
VMD sampled by , observed by . VMD fish looked healthy when opened [Original PDF]
Case Number: 2023-0240
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Site inspected in a calm sea state with heavy cloud cover, visibility from the pen side was <2m. During the inspection of the stock 14 lethargic / moribund fish were observed. The site has been burdened by a prolonged period of on-going mortality,
North Papa conducted a freshwater treatment using the Aqua Viking in March and approximately 10% of the stock sustained physical damage thought to have been caused during crowding which resulted in increased mortality in the weeks following the treatment. The site confirmed CMS on 19/05/2023 and mortality has been above the reporting threshold since. Current mortality appears to be affecting all cages across the site evenly. During the inspection of the site three fish displaying clinical signs of disease were removed from cages 5, 6 & 8 for diagnostic sampling.
The site have also been experiencing had a higher than usual burden of Caligus elongatus for the current time of year. North
Papa conducted a slice treatment from 24/04/23 - 05/05/23, followed by a thermolicer treatment from 22/05/23 - 01/06/23.
During the inspection of the site some fish were observed with mild physical damage to the under belly.
VMD samples were taken from cage 10, fish sampled for VMD appeared healthy both internally and externally. [Original PDF]