Site Details: Muck

The Pier
Isle of Muck
Inverness-shire
PH41 2RP
Operator: Mowi Scotland 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: 2.6 %

Production cycle end date: Feb 2020
Total losses: 39 %

Production cycle end date: Jun 2022
Total losses: 2 %

Production cycle end date: Aug 2023
Total losses: 8.1 %

Source

Fish Health Inspectorate mortality

Date:
03/01/22-09/01/22
Mortality:
934
Mortality Rate:
1.68%
Reason given: Mature fish
Mature fish
Mortality reduced the week following to below the reporting threshold, 0.88%. Site to be fallow by end of January 2022.
Date:
29/08/22-04/09/22
Mortality:
16,009
Mortality Rate:
2.18%
Reason given: Gill infections
Gill infections
Harvests planned
First report this cycle. 1.46% for Mon to Wed this week. FHI to monitor
Date:
05/09/22-11/09/22
Mortality:
98,953
Mortality Rate:
13.79%
Reason given: Gill-Health Related
Gill-Health Related
Harvesting - planned to be empty by 18th Sep
Site fallow
Date:
12/09/22-18/09/22
Mortality:
64,473
Mortality Rate:
15.54%
Reason given: Gill infections
Gill infections
Site now fallow
Site fallow
Date:
19/09/22-25/09/22
Mortality:
1,225
Mortality Rate:
2.11%
Reason given: Gill infections
Gill infections
Site now fallow
Site now fallow.
Date:
10/07/23-16/07/23
Mortality:
2,896
Mortality Rate:
1.37%
Reason given: CMS
CMS
PD confirmed on site as well as CMS. Site to fallow in 4 weeks.
Business correspondent contacted for further information. FHI to monitor.
Date:
17/07/23-23/07/23
Mortality:
4,215
Mortality Rate:
2.69%
Reason given: CMS
CMS
PD confirmed on site as well as CMS. Site to fallow in 4 weeks.
Business contacted for more information. No change in site mortality levels. Site is currently harvesting and will be fallow in coming weeks. FHI to continue monitoring.
Date:
24/07/23-30/07/23
Mortality:
2,021
Mortality Rate:
1.42%
Reason given: CMS
CMS
business contacted: fallowing next week
FHI to monitor.
Date:
31/07/23-06/08/23
Mortality:
2,092
Mortality Rate:
2.17%
Reason given: CMS
CMS
FHI to monitor - site harvesting to fallow
Date:
07/08/23-13/08/23
Mortality:
1,502
Mortality Rate:
2.60%
Reason given: CMS
CMS
Site currently harvesting, due to fallow week 34.
Date:
06/11/23-12/11/23
Mortality:
8,039
Mortality Rate:
1.00%
Reason given: Transportation
Transportation
Site harvesting out
Health, Welfare and Biology director for Mowi contacted. Fish moving on site at end of Oct from Linnhe. Higher transport related mortality in one well boat movement. Fish are being passively graded on site, and largest fish are being harvested out. FHI to monitor
Date:
27/11/23-03/12/23
Mortality:
9,703
Mortality Rate:
1.31%
Reason given: Bacterial
Bacterial
Site harvesting out
FHI to monitor

Source

Inspection reports

Case Number: 2021-0431


Download Targeted harvesting on-going on site. Pen 1 being harvested currently, pen 12 next. Likelihood that whole site will be harvested out will be quite high, but restricted with availability and weather.
Weather significant factor with harvesting, treatments and morting.
Operator fed through jellyfish bloom, July/August. Caused significant damage to gills.
Potential for whole site to be harvested.
Boat brought in to help with mortality disposal, being taken to Shetland.
Fresh water treatments concluded 14th of September. Fish took treatments fairly well considering poor gill health.
Lumpfish deployed to help with higher lice counts.
Mortality had reduced significantly in week 42, so far. But data for this week not complete.
Mortality ( last 4 weeks)
Week 41 - 2.26% - 10365 week 40 - 1.85% - 10304 week 39 - 1.07% - 6017 week 38 - 5.94% - 37008 [Original PDF]

Case Number: 2022-0096


Download Remote inspection carried out on 19/04/2022 by supervised by . Site inspection carried out on 26/04/2022 by and . VMD samples taken by .
Site has its own ROV for net inspections. There are regular dive checks. Seal PRO nets are to be installed for next cycle.
Fish observed all shoaling as in normal behaviour and fish sampled for VMD appeared in healthy upon closer examination both externally and internally with no signs of disease.
Site currently passive grading and harvesting almost every second day.
During inspection, 2 fish in pen 7 were seen to have possible seal damage and were caught and humanely killed.
Site currently stocked with fish moved from Cheesebay (moved onto site between 02/02/022 - 19/03/22) due to fish welfare considerations and risk of biomass exceedance at their host site (Grey Horse Channel and Groatay). Muck was fallow for 17 days before Cheesebay fish arrived and will be fallow after Cheesebay stock are harvested in June until restocking at the end of August.
A seal was discovered in one pen on 22/10/2021, divers were called out same day and found a hole (122mm x 36mm) at a depth of 19m and repaired it. It was judged at the time that no escape or circumstances which gave rise to a significant risk of escape had occurred, therefore it was considered that the FHI was not required to be informed. Recommendations were made to review escapes reporting procedure including staff training, and a retrospective escapes notification has been submitted to the FHI.
Closing counts indicated that no escapes occurred as a result of this incident and the site now has double mesh nets on all pens along with seal blinds to aid containment. [Original PDF]

Source