Publication - Report

Annual Fish Farm Production Survey 2012

Published: 9 Sep 2013
Part of:
Marine and fisheries
ISBN:
9781782568384

Annual Fish Farm Production Survey 2012

54 page PDF

2.0 MB

54 page PDF

2.0 MB

Contents
Annual Fish Farm Production Survey 2012
SUMMARY

54 page PDF

2.0 MB

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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