The tables below summarise the results from the 2020 fish farms annual production survey (slight difference in these summary figures from figures in the main report are due to rounding).
Rainbow Trout (Oncorhynchus mykiss)
|Production for the table||(tonnes)||6,906||7,032|
|Production for restocking||(tonnes)||499||544|
|Number of staff employed||144||134|
|Number of ova laid down to hatch||(millions)||6.6||6.2|
|Number of ova imported||(millions)||6.5||4.7|
In 2020, the production of rainbow trout increased by 171 tonnes. Employment decreased by 10 staff and mean productivity increased to 56.5 tonnes per person. The number of ova laid down to hatch decreased by 0.4 million and the number of ova imported decreased by 1.8 million.
Atlantic Salmon (Salmo salar)
Ova and Smolts
|Number of ova produced||(millions)||11.6||20.0|
|Number of ova laid down to hatch||(millions)||71.2||78.6|
|Number of ova exported||(millions)||0||0|
|Number of ova imported||(millions)||60.2||60.1|
|Number of smolts produced||(millions)||51.4||50.5|
|Number of smolts put to sea||(millions)||53.0||52.5|
|Number of staff employed||281||292|
|Mean productivity (000's smolts/person)||183.0||172.9|
The production of ova increased by 8.4 million in 2020 and the number of ova laid down to hatch increased by 7.4 million. No ova were exported in 2020 and the number of ova imported decreased by 0.1 million from the 2019 figure. The number of smolts produced decreased by 0.9 million. In 2020 the number of staff employed increased by 11 and mean productivity decreased by 10,100 smolts per person.
|Production of 0-year fish||(tonnes)||931||1,208|
|Production of grilse||(tonnes)||72,243||88,025|
|Production of pre-salmon||(tonnes)||59,847||57,808|
|Production of year 2 salmon||(tonnes)||70,860||45,088|
|Mean fish weight 0-year||(kg)||2.9||3.7|
|Mean fish weight grilse||(kg)||5.0||4.8|
|Mean fish weight pre-salmon||(kg)||5.1||5.3|
|Mean fish weight year 2 salmon||(kg)||5.8||5.5|
|Number of staff employed||1,651||1,630|
Production tonnage decreased by 11,752 tonnes with an increase in the mean harvest weight of year 0 and pre-salmon but a decrease in the mean weight of grilse and year 2 salmon. Staff numbers decreased by 21 and mean productivity decreased to 117.9 tonnes per person.
Smolt survival (percentage harvested)
|Survival (%)||Years 0+1||Year 2||Total|
|2017 input year class||47.3||26.5||73.8|
|2018 input year class||57.8||17.9||75.9|
The smolt survival rate for the 2018 input year class increased to 75.9%. Mortality is included in the number of fish not harvested for human consumption, which also consists of fish which have escaped, been culled for production reasons, removed for sampling purposes, statutory culls or selected for broodstock production.
Including brown/sea trout (Salmo trutta); halibut (Hippoglossus hippoglossus); lumpsucker (Cyclopterus lumpus) and several species of wrasse (Labridae).
|Number of staff employed||(full-time)||38||22|
|Number of ova laid down to hatch||(millions)||19.8b||20.7b|
|Number of ova imported||(millions)||1.3||0.7|
Some figures are excluded from this report as providing them would reveal production information from an individual company.
aExcluding halibut production.
bExcluding halibut ova laid down to hatch.
In 2020, the production of other species increased by two tonnes from the 2019 total, although this figure does not include halibut production. Overall, employment decreased by 18 in 2020. There was an increase in the number of ova laid down to hatch during 2020 but any halibut ova laid down to hatch were excluded from this figure.
Number of Confirmed Escape Incidents from Fish Farms Notified to the Scottish Government
|Species||Number of reported incidents which could have led to an escape of farmed fish||Number of reported incidents which did lead to an escape of farmed fish||Number of fish escaped|
|Atlantic salmon (freshwater stages)||1||1||20|
|Atlantic salmon (seawater stages)||13||5||204,901|