Salmon Scotland mortality

Source

Cumulative mortality over full production cycle

Production cycle end date: Feb 2018
Total losses: 26.7 %

Production cycle end date: Sep 2019
Total losses: 40.9 %

Production cycle end date: Jul 2021
Total losses: 4.6 %

Production cycle end date: Oct 2022
Total losses: 22.9 %

Source

Inspection reports

Case Number: 2020-0498

Download Mortality not reported at end of cycle - 2019, low numbers. week 35 - 2.58 - 1385 - Background CGD driving back ground mortality. week 36 - 3.43 - 721 spike in lice number during the summer months, mechanical thermolicer treatment conducted to get number back down. Lice counts went back down to low numbers in week following
Lice numbers above threshold week 27 - 2019 - 2.20 - reported to FHI
Lumpfish imported from Republic of Ireland - 12th and 22nd February 2020 - 15,000 and 10,000
Fished appeared to be in good condition. Good feeding response. All fish sampled for VMD appeared to be healthy and showed no clinical signs of disease. [Original PDF]

Case Number: 2021-0183

Download LUM imported from Ireland for this cycle (2020), not planning to do this in the future
Above CoGP 2021 wk 22 0.75AF, all other weeks below and generally very low
Recent plankton samples showed high levels of Chaetoceros socialis, struggling this week to catch fish for lice counts as fish are staying very deep in the water.
Hoping not to treat prior to fallowing the site, only 3 cages remaining. Harvest is currently planned once a week but if lice figures increased further this could be expedited and could possibly empty site in the space of a week. Gills slightly compromised, which is another factor site being considered with regards to treatments.
Only operator in CoGP management area.
Cleaner fish observed on site, salmon deeper in the pens and at times challenging light conditions resulting in decreased visibility. No moribund or lethargic fish observed. Fish sampled for VMD appeared healthy and in good condition.
Cleaner fish mortality records: Mortality in last 4 weeks between 51-83 per week for the entire site for both wrasse and lumpfish. Increase in mortality from wk 29 2020 until week 41 2020 with a peak in mortality in wk 35 2020 at 2,364 morts.
Largely mortalities are attributed to treatments for lice and AGD. Some mortalities of lumpfish believed to be attributed to increased water temperatures.
Database entry records mortalities by different species but exports from the database don't reflect this. Company who provided the database is currently working on improving this.
Paperwork completed remotely on 4/6/2021 by shadowed by . Physical site inspection on 9/6/21 by . [Original PDF]

Source