Site Details: Maol Ban

Caol Mhor, Maol Ban
Sconser
IV48 8TD
Operator: Mowi Scotland Ltd
Water type: Seawater

Average female lice per fish

Source

Salmon Scotland mortality

Source

Cumulative mortality over full production cycle

Maol Ban Production cycle end date: Aug 2019
Total losses: 23.4 %

Maol Ban Production cycle end date: Apr 2021
Total losses: 8.7 %

Maol Ban Production cycle end date: Dec 2021
Total losses: 19 %

Maol Ban Production cycle end date: Mar 2024
Total losses: 9.9 %

Source

Fish Health Inspectorate mortality

Date:
12/12/22-18/12/22
Mortality:
5,674
Mortality Rate:
1.01%
Reason given: AGD
AGD
First report this cycle. FHI to monitor.
Date:
20/03/23-26/03/23
Mortality:
9,356
Mortality Rate:
1.78%
Reason given: Moritella
Moritella
Spoke to business. Moritella main cause but HSMI has also been detected on site. Site to reducing biomass by passive grading. FHI to monitor.
Date:
27/03/23-02/04/23
Mortality:
5,536
Mortality Rate:
1.08%
Reason given: Moritella
Moritella
Business contacted. Currently harvesting the worst affected pens and continuing to harvest. Freshwater treatment planned for calligus.
Date:
03/07/23-09/07/23
Mortality:
2,714
Mortality Rate:
1.09%
Reason given: CMS
CMS
CMS confirmed onsite attributing to mortality along with treatment loss from a recent thermolicer treatment. Mortality is expected to reduce below the reporting threshold for the next reporting week.
Site contacted for further information, FHI to monitor.
Date:
24/07/23-30/07/23
Mortality:
5,908
Mortality Rate:
2.37%
Reason given: CMS
CMS
business contacted: fallowing next week
FHI to monitor.
Date:
31/07/23-06/08/23
Mortality:
4,433
Mortality Rate:
2.02%
Reason given: CMS
CMS
FHI to monitor - site harvesting to fallow
Date:
07/08/23-13/08/23
Mortality:
2,128
Mortality Rate:
1.14%
Reason given: CMS
CMS
Site fallow - no action required.
Date:
14/08/23-20/08/23
Mortality:
7,750
Mortality Rate:
2.08%
Reason given: Treatment losses - freshwater in wellboat
Treatment losses - freshwater in wellboat
Business contacted - fish moved from Greshornish to Moal Ban due to jellyfish.
Business contacted. FHI to monitor.
Date:
21/08/23-27/08/23
Mortality:
10,067
Mortality Rate:
1.72%
Reason given: Treatment losses - freshwater in wellboat
Treatment losses - freshwater in wellboat
Fish tranranferred from Greshornish gill health the main issues, mortalities the result of the transfer and treatment, stocks are reported to be feeding well and mortalities are reducing, FHI to monitor.
Date:
20/11/23-26/11/23
Mortality:
3,899
Mortality Rate:
1.15%
Reason given: Mechanical treatment loss
Mechanical treatment loss
First report since initial transfer of stock onto site. Mortality levels below reporting wk 48. FHI to monitor.
Date:
11/12/23-17/12/23
Mortality:
4,680
Mortality Rate:
1.57%
Reason given: Gill infections / Treatment loss
Gill infections / Treatment loss
FHI to monitor.
Date:
08/01/24-14/01/24
Mortality:
2,528
Mortality Rate:
1.003146738%
Reason given: Bacterial Infection
Bacterial Infection
Business contacted: residual effects from previous sea lice treatment and low level of P. skyensis identified
Business contacted for additional information. FHI to monitor.

Source

Inspection reports

Case Number: 2020-0463


Download Inspection of records carried out remotely on 28/10/2020
H2O2 treatment planned week beginning 02/11/20 for the treatment of AGD
Lumpfish moved on site from Ireland. Cumulative mortality of 14% since input, a significant proportion related to post freshwater treatment mortality.
5 mortalities observed across site, these were removed by site staff. No moribund or lethargic fish observed.
Site thermometer used due to battery failure in FHI thermometer
Fish sampled for VMD appeared healthy [Original PDF]

Case Number: 2021-0531


Download Remote and physical inspection conducted by observed by . Site is currently harvesting with plans to fallow in
January 2022. Fish on site appeared healthy with no clinical signs of disease observed. No gross pathology observed in fish sampled for VMD. Site thermometer used as inspectors thermometer was unavailable. [Original PDF]

Case Number: 2023-0040


Download Site consists of 6 x 160m cages. 5 cages are used for stocking salmon and the remaining cage is used for holding freshwater for treatments.
Top nets use poles rather than central net support, it was reported that these worked well and removal of central support removed the potential for fish to suffer concussion whilst jumping and hitting the support.
Caligus numbers had been increasing on site, targetted treatments are being conducted on cages to reduce numbers, when required, Lep numbers have been low throughout the cycle, although increased 2023 WK 4, but not above the increased monitoring level. Numbers have reduced to 0.2 adult females for 2023 WK 6.
Site had received positive results for furunculosis, however, decIsion was made to reduce handling rather than treat, this was reported to have been successful in limiting mortalities and negative results were recently returned for furunculosis.
Although the site has had positive results for furunculosis and CMS, these are not reported to be causing mortalities, but numbers are expected to increase as handling operations become more frequent.
Sites operated from Maol Ban shorebase are numbered sequentially from north to south - Sconser Quarry - Cages 1 - 7, Maol
Ban - Cages 8 - 12 and Cairidh -Cages 13 -17
3 dead observed across site, these were not fresh mortalities and were removed by site staff during inspection. [Original PDF]

Source