Site Details: Creag an T'Sagairt (Loch Hourn)

Arnisdale
Glenelg
Ross-shire
IV40 8JH
Operator: Mowi Scotland Ltd
Water type: Seawater

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Average female lice per fish

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Salmon Scotland mortality

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Cumulative mortality over full production cycle

Loch Hourn Production cycle end date: Feb 2018
Total losses: 16.4 %

Loch Hourn Production cycle end date: Jan 2020
Total losses: 11.4 %

Loch Hourn Production cycle end date: Dec 2021
Total losses: 8.3 %

Loch Hourn Production cycle end date: Oct 2023
Total losses: 34.6 %

Loch Hourn Production cycle end date: Mar 2024
Total losses: 3.2 %

Source

Fish Health Inspectorate mortality

Date:
15/05/23-21/05/23
Mortality:
31,099
Mortality Rate:
3.01%
Reason given: Thermolicer Treatment
Thermolicer Treatment
Called for further information - handling during thermolicer treatment caused mortalities in population that has CMS, treatment was aborted. Treatment has now been conducted with FW and improvements seen. FHI to monitor.
Date:
22/05/23-28/05/23
Mortality:
10,093
Mortality Rate:
1.01%
Reason given: Thermolicer Treatment
Thermolicer Treatment
Alternative treatment conducted
Health director called for more information. Occurred during crowding of fish before thermolicer treatment. The treatment was aborted and a new method of treatment was organised using the FLS system. This new system uses a combination of two physical treatments to first weaken the lice and them removed them with water. This method of treatment is reportedly more gentle on the fish. This reduced mortality and removed lice. FHI to monitor
Date:
19/06/23-25/06/23
Mortality:
14,082
Mortality Rate:
1.45%
Reason given: Gill Issues - jellyfish
Gill Issues - jellyfish
Business contacted: This year seems to be mostly Obelia (jellyfish), which is different from previous years. Have also started to see increased level of concussion on site through a sudden influx of adult Caligus, which are susppected to have come in with wild fish as previously no juvenile stages of Caligus have been observed on site.
Business contacted for additional information. FHI to monitor.
Date:
26/06/23-02/07/23
Mortality:
18,416
Mortality Rate:
2.78%
Reason given: Gill issues - jellyfish
Gill issues - jellyfish
Unable to get in touch with site contact. FHI to monitor.
Date:
03/07/23-09/07/23
Mortality:
24,436
Mortality Rate:
2.87%
Reason given: Gill issues - jellyfish
Gill issues - jellyfish
Date:
10/07/23-16/07/23
Mortality:
49,907
Mortality Rate:
6.16%
Reason given: Gill infections / CMS
Gill infections / CMS
Site is positive for HSMI and CMS. Site is also positive for AGD and PGD, with also jellyfish damage being observed. Handling of fish has exacerbated mortality. Due to sealice increasing on site, intervention via FW and FLS conducted in WK 28. Targeted harvestes scheduled for WK30. In addition, weekly health visits with diagnostic sampling has been occurring.
Business correspondent contacted for further information. FHI to monitor.
Date:
24/07/23-30/07/23
Mortality:
11,486
Mortality Rate:
1.52%
Reason given: Gill infections / HSMI
Gill infections / HSMI
business contacted: FW treatment, HSMI
FHI to monitor.
Date:
31/07/23-06/08/23
Mortality:
13,927
Mortality Rate:
1.87%
Reason given: Gill infections / CMS
Gill infections / CMS
FHI to monitor
Date:
07/08/23-13/08/23
Mortality:
17,859
Mortality Rate:
2.44%
Reason given: Gill infections / CMS
Gill infections / CMS
Site contacted for further information, Main cause of mortality is currently from CMS and gill infections. Signs of bacterial infections have been identified in some of the stocks (frunculosis). The site is sheduled to begin harvesting from Week 34, harvesting to fallow by week 38.
FHI to monitor.
Date:
14/08/23-20/08/23
Mortality:
22,458
Mortality Rate:
3.15%
Reason given: Gill infections / CMS
Gill infections / CMS
Main cause of mortality is currently from CMS and gill infections. Signs of bacterial infections have been identified in some of the stocks (frunculosis). The site is sheduled to begin harvesting from Week 34, harvesting to fallow by week 38.
FHI to monitor.
Date:
21/08/23-27/08/23
Mortality:
19,089
Mortality Rate:
2.76%
Reason given: Gill infections / CMS
Gill infections / CMS
Targeted harvesting ongoing, issue with early maturation and gill health from jellyfish, mortlities will continue but will imporve as biomass is reduced,
FHI to monitor.
Date:
28/08/23-03/09/23
Mortality:
11,794
Mortality Rate:
2.02%
Reason given: Gill infections / CMS
Gill infections / CMS
Ongoing mortality issue. FHI visit scheduled
Date:
04/09/23-10/09/23
Mortality:
5,796
Mortality Rate:
1.28%
Reason given: Gill infections / CMS
Gill infections / CMS
Update 18/09/2023: Harvesting to fallow in next 3-4 weeks. Early maturation of fish. Reducing handling.
Site inspected 07/09/2023. FHI to monitor.
Date:
11/09/23-17/09/23
Mortality:
4,806
Mortality Rate:
1.08%
Reason given: Gill infections/HSMI
Gill infections/HSMI
Harvesting ongoing, numbers have increased mainly due to the increased handling and background gill issues, HSMI and jellyfish part of the cause.
FHI to monitor.
Date:
02/10/23-08/10/23
Mortality:
2,594
Mortality Rate:
1.24%
Reason given: Gills
Gills
Biomass and stocking density has been reduced significantly and mortality trends are stabilising
FHI to monitor.
Date:
09/10/23-15/10/23
Mortality:
1,796
Mortality Rate:
1.03%
Reason given: Gills
Gills
Mortality down. FHI to monitor
Date:
23/10/23-29/10/23
Mortality:
2,700
Mortality Rate:
3.93%
Reason given: Gills
Gills
Site now fallow
No further action, site fallow
Date:
04/12/23-10/12/23
Mortality:
3,486
Mortality Rate:
1.26%
Reason given: Transportation
Transportation
FHI to monitor.

Source

Inspection reports

Case Number: 2022-0477


Download Additional peaks in salmon mortality in 2021 wk 30 1.32% 3604 (CMS), wk 31 1.61% 4426 (CMS), wk 32 1.90% 4139 (CMS), wk 38 3.80 4649 (transfer losses), wk 40 2.61% 6092 records detail 3538 fw to sw transfer loss, 2122 SW to SW. The FW to
SW entry was confirmed to be an error when inputting data.
Additional peaks in lumpfish mortality 2020 wk 39 8594 9.23% (AGD & other non infectious causes), wk 41 7.78% 3695 AGD, handling and transport losses), wk 43 7.19% 6685 (no specific cause)
No issues reported with the new input, fish are feeding well. [Original PDF]

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