Annual Fish Farm Production Survey 2012
Annual Fish Farm Production Survey 2012
SUMMARY
The tables below summarise the results from the 2012 fish farms annual production survey.
Rainbow Trout ( Oncorhynchus mykiss)
| 2011 | 2012 | ||
|---|---|---|---|
| Total production | (tonnes) | 4,619 | 5,670 |
| Production for the table | (tonnes) | 3,858 | 5,059 |
| Production for restocking | (tonnes) | 761 | 611 |
| Number of staff employed | 118 | 107 | |
| Mean productivity | (tonnes/person) | 39.1 | 53.0 |
| Number of ova laid down to hatch | (millions) | 15.1 | 13.0 |
| Number of ova imported | (millions) | 14.7 | 12.7 |
In 2012, the production of rainbow trout increased by 1,051 tonnes. Employment decreased by 11 staff and productivity per person increased to 53 tonnes. The number of ova laid down to hatch decreased by 2.1 million and the number of ova imported decreased by 2.0 million.
Other Species
(including Arctic charr, Salvelinus alpinus; brown trout, Salmo trutta; cod,
Gadus morhua, halibut, Hippoglossus hippoglossus and several wrasse species, Labridae)
| 2011 | 2012 | ||
|---|---|---|---|
| Total production | (tonnes) | 146 | 115 |
| Number of staff employed | (full-time) | 24 | 25 |
| (part-time) | 19 | 21 | |
| Number of ova laid down to hatch | (millions) | 2.1 | 1.9 a |
| Number of ova imported | (millions) | 0 | 0 b |
a Excluding wrasse ova laid down to hatch from foreign sources.
b Excluding wrasse ova imported.
In 2012 the production of other species decreased by 31 tonnes on the 2011 total. Overall, employment increased by three in 2012. Inclusion of the wrasse ova from foreign sources means there was a small increase in the number of ova laid down to hatch.
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 |
|---|---|---|---|
| Rainbow trout | 0 | 2 | 3,434 |
| Atlantic salmon (freshwater stages) | 1 | 1 | 3,180 |
| Atlantic salmon (seawater stages) | 0 | 3 | 34,343 |
| Other species | 0 | 0 | 0 |
Atlantic salmon ( Salmo salar)
Smolts
| 2011 | 2012 | ||
|---|---|---|---|
| Number of ova produced | (millions) | 78.2 | 90.5 |
| Number of ova laid down to hatch | (millions) | 64.6 | 63.2 |
| Number of ova exported | (millions) | 0.8 | 0 |
| Number of ova imported | (millions) | 39.3 | 34.0 |
| Number of smolts produced | (millions) | 43.6 | 44.3 |
| Number of smolts put to sea | (millions) | 42.7 | 41.1 |
| Number of staff employed | 293 | 328 | |
| Mean productivity (000's smolts/person) | 148.9 | 135.1 | |
The production of ova increased by 12.3 million in 2012 and the number of ova laid down to hatch decreased by 1.4 million. There were no exports of ova and imports of ova decreased in 2012 . The number of smolts produced increased by 0.7 million. The number of staff employed increased by 35 and mean productivity decreased by 13.8 tonnes per person.
Production fish
| 2011 | 2012 | ||
|---|---|---|---|
| Total production | (tonnes) | 158,018 | 162,223 |
| Production of 0-year fish | (tonnes) | 307 | 301 |
| Production of grilse | (tonnes) | 35,146 | 53,216 |
| Production of pre-salmon | (tonnes) | 55,959 | 44,528 |
| Production of salmon | (tonnes) | 66,606 | 64,178 |
| Mean fish weight 0-year | (kg) | 2.8 | 2.4 |
| Mean fish weight grilse | (kg) | 4.6 | 4.7 |
| Mean fish weight pre-salmon | (kg) | 5.0 | 4.4 |
| Mean fish weight salmon | (kg) | 4.8 | 4.9 |
| Number of staff employed | 1,013 | 1,059 | |
| Mean productivity | tonnes/person | 156.0 | 153.2 |
Production tonnage increased by 2.7% with an increase in mean harvest weight of grilse and salmon but a decrease in mean weight of 0-year fish and pre-salmon. Staff numbers increased by 46. Mean productivity showed a decrease of 2.8 tonnes per person.
Smolt survival (percentage harvested)
| Survival (%) | Years 0+1 | Year 2 | Total |
|---|---|---|---|
| 2009 input year class | 47.6 | 35.7 | 83.3 |
| 2010 input year class | 48.9 | 33.9 | 82.8 |
Overall smolt survival decreased by 0.5% compared with the 2009 year class.
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