Publication - Statistics

Scottish fish farm production survey 2017

Published: 15 Oct 2018
Directorate:
Marine Scotland Directorate
Part of:
Marine and fisheries
ISBN:
9781787812826

This report is based on the returns of an annual survey questionnaire sent to all active authorised fish farming businesses in Scotland.

55 page PDF

4.2 MB

55 page PDF

4.2 MB

Contents
Scottish fish farm production survey 2017
1. Rainbow Trout (Oncorhynchus mykiss)

55 page PDF

4.2 MB

1. Rainbow Trout (Oncorhynchus mykiss)

Production survey information was collected from all 23 companies actively involved in rainbow trout production, farming 44 active sites. This figure represents the entire industry operating in Scotland.

Production

Table 1a: Annual production (tonnes) of rainbow trout during 2003-2017 and projected production in 2018

Year

Tonnes

Year

Tonnes

2003

7,085

2011

4,619

2004

6,352

2012

5,670

2005

6,989

2013

5,611

2006

7,492

2014

5,882

2007

7,414

2015

8,588

2008

7,670

2016

8,096

2009

6,766

2017

7,637

2010

5,139

2018

6,361*

* Industry estimate based on stocks currently being on-grown.

Production decreased in 2017 by 459 tonnes, a decrease of 6%, to 7,637 tonnes.

Table 1b: Production (tonnes) for the table trade during 2007-2017 according to weight category

Year

<450 g

450-900 g

>900 g

Total

<1 lb

1-2 lbs

>2 lbs

Tonnes

2007

2,499

1,663

2,407

6,569

2008

2,375

1,950

2,487

6,812

2009

2,232

1,143

2,620

5,995

2010

2,125

727

1,606

4,458

2011

1,421

1,004

1,433

3,858

2012

1,195

1,655

2,209

5,059

2013

1,908

825

2,268

5,001

2014

2,334

290

2,704

5,328

2015

2,299

258

5,476

8,033

2016

2,393

234

4,810

7,437

2017

2,000

544

4,453

6,997

Production for the table in 2017 was 6,997 tonnes, a decrease of 440 tonnes (6%) on the 2016 total. This accounted for 92% of the total rainbow trout production, the same proportion as was produced in 2016. Also, an increase in the number of fish in the medium size range and decreases in the number of fish in the small and large size ranges were highlighted.

Table 1c: Production (tonnes) for the restocking trade during 2007-2017 according to weight category

Year

<450 g

450-900 g

>900 g

Total

<1 lb

1-2 lbs

>2 lbs

Tonnes

2007

24

413

408

845

2008

27

351

480

858

2009

32

294

444

770

2010

19

201

461

681

2011

8

419

334

761

2012

22

266

323

611

2013

24

221

365

610

2014

28

256

270

554

2015

15

158

382

555

2016

35

183

441

659

2017

10

150

480

640

In 2017, production for the restocking of angling waters decreased to 640 tonnes representing a decrease of 19 tonnes (3%) on the 2016 total. This accounted for 8% of total rainbow trout production in 2017. These figures represent the tonnage of fish supplied to angling waters for restocking purposes; they do not account for the catch taken by anglers. The production of small and medium sized fish showed decreases while there was an increase in the production of large sized fish.

Production by Site

Table 2: Numbers of sites grouped by tonnage produced during 2007-2017

Year

Number of sites per production tonnage

Total number of sites

<1-25

26-100

101-200

>200

2007

14

15

3

16

48

2008

8

15

7

14

44

2009

10

11

7

11

39

2010

7

13

9

7

36

2011

9

10

6

8

33

2012

10

10

6

8

34

2013

6

11

5

8

30

2014

6

11

5

9

31

2015

4

10

5

11

30

2016

6

10

3

13

32

2017

4

8

5

11

28

Production was reported from 28 of the 44 active sites. The number of producers in the size bracket 101-200 tonnes increased while those in the <1-25 tonnes, 26-100 tonnes and >200 tonnes size brackets decreased. These figures do not include those sites specialising in the production of ova or young fish for on-growing.

Production by Method

Table 3: Grouping of rainbow trout sites by production tonnages, main methods of production in 2017 and comparison with production in 2016

Production method

Production grouping (tonnes)

in 2017

Total tonnage and (%) by method

Number of sites

<10

10-25

26-50

51-100

>100

2016

2017

2016

2017

FW cages

1

0

0

0

5

2,836

(35.0%)

2,592

(34.0%)

6

6

FW ponds and raceways

0

1

3

4

5

1,420

(17.6%)

1,484

(19.4%)

15

13

FW tanks and hatcheries

2

0

0

1

0

81 (1.0%)

79 (1.0%)

4

3

SW cages

0

0

0

0

6

3,759

(46.4%)

3,482

(45.6%)

7

6

SW tanks

0

0

0

0

0

0

0

0

0

Total

3

1

3

5

16

8,096

7,637

32

28

Freshwater production accounted for 4,155 tonnes (54.4%) and seawater production for the remaining 3,482 tonnes (45.6%). Production from freshwater ponds and raceways increased whilst there were small decreases in production from freshwater cages, freshwater tanks and hatcheries and seawater cages.

Company and Site Data

Table 4: Number of companies and sites in production during 2004-2017

Year

No. of companies

No. of sites

2004

38

62

2005

42

70

2006

36

66

2007

38

70

2008

31

66

2009

27

56

2010

25

51

2011

23

48

2012

25

48

2013

24

46

2014

24

46

2015

24

45

2016

24

44

2017

23

44

In 2017 the number of companies authorised by the Scottish Government and actively engaged in rainbow trout production was 23. The number of sites registered and in production was 44.

Staffing and Productivity

Table 5: Number of staff employed and productivity per person during 2004-2017

Year

Full-time

Part-time

Total

Productivity
(tonnes/person)

2004

115

37

152

41.8

2005

108

35

143

48.9

2006

112

35

147

51.0

2007

111

32

143

51.8

2008

107

34

141

54.4

2009

111

27

138

49.0

2010

98

31

129

39.8

2011

95

23

118

39.1

2012

79

28

107

53.0

2013

89

21

110

51.0

2014

93

20

113

52.1

2015

110

16

126

68.2

2016

100

21

121

66.9

2017

110

22

132

57.9

The overall number of staff employed in 2017 increased by 11 to 132. The number of full-time staff increased by 10 while the number of part-time staff increased by one. Productivity, measured as tonnes produced per person, decreased by 13.5% in 2017 with no distinction between full and part-time employees being made for this calculation.

Production by Area

Table 6: Production and staffing by area in 2017

Area

No. of sites

Table production (tonnes)

Restocking production (tonnes)

Mean tonnes per site

Staffing

Productivity (tonnes/person)

F/T

P/T

Total

North

4

2

31

8.3

4

2

6

5.5

East

13

1,032

333

105.0

38

7

45

30.3

West

16

5,198

25

326.4

50

5

55

95.0

South

11

765

251

92.4

18

8

26

39.1

All

44

6,997

640

173.6

110

22

132

57.9

Productivity was greatest in the West at 326.4 tonnes per site and 95.0 tonnes per person.

Figure 1: The distribution of active rainbow trout sites in 2017

Figure 1: The distribution of active rainbow trout sites in 2017

Type of Ova Laid Down

Table 7: Number (000’s) and proportions (%) of eyed ova types laid down to hatch during 2006-2017

Year

All female
diploid no. (%)

Triploid no. (%)

Mixed sex
diploid no. (%)

Total ova

2006

22,378 (84)

2,804 (10)

1,626 (6)

26,808

2007

23,630 (83)

2,531 (9)

2,140 (8)

28,301

2008

22,978 (88)

2,526 (9)

725 (3)

26,229

2009

15,469 (87)

2,341 (13)

35 (<1)

17,845

2010

13,352 (89)

1,052 (7)

675 (4)

15,079

2011

12,673 (84)

2,254 (15)

215 (1)

15,142

2012

10,967 (85)

2,005 (15)

7 (<1)

12,979

2013

7,857 (80)

1,955 (20)

77 (<1)

9,889

2014

8,321 (75)

2,710 (25)

9 (<1)

11,040

2015

10,245 (85)

1,800 (15)

76 (<1)

12,121

2016

7,986 (80)

1,943 (20)

5 (<1)

9,934

2017

2,366 (34)

4,670 (66)

5 (<1)

7,041

Source of Ova Laid Down

Table 8: Number (000’s) and sources of eyed ova laid down to hatch in 2006-2017

Year

Ova produced in

Great Britain (GB)

Imported ova

Total

Own stock

Other stock

Total

Northern hemisphere

Southern hemisphere

Total

2006

541

2,169

2,710

22,588

1,510

24,098

26,808

2007

936

230

1,166

26,650

485

27,135

28,301

2008

582

487

1,069

25,160

0

25,160

26,229

2009

603

220

823

17,022

0

17,022

17,845

2010

415

50

465

14,614

0

14,614

15,079

2011

215

189

404

14,738

0

14,738

15,142

2012

14

230

244

12,735

0

12,735

12,979

2013

77

537

614

9,275

0

9,275

9,889

2014

9

655

664

10,376

0

10,376

11,040

2015

6

888

894

11,227

0

11,227

12,121

2016

35

349

384

9,550

0

9,550

9,934

2017

20

547

567

6,474

0

6,474

7,041

In 2017, the total number of eyed ova laid down to hatch decreased by almost 2.9 million (29%) on the 2016 figure. The proportion of ova from GB broodstock increased to 8.1% of the total and the rainbow trout industry remained reliant on imported ova. Data on the importation of ova into Scotland are also available from the health certificates and are shown in Table 9a. Any discrepancy between the figures in Tables 8 and 9a is due to data being obtained from two independent sources.

Imports from Official Import Health Certificates

Table 9a: Number (000’s) and sources of ova imported into Scotland from outwith GB during 2010-2017

Source

2010

2011

2012

2013

2014

2015

2016

2017

Denmark

1,715

5,250

1,950

1,315

2,500

2,330

5,535

3,518

Isle of Man

1,400

520

300

800

1,000

175

20

300

N. Ireland

9,247

7,320

8,332

5,125

4,780

6,535

3,040

1,240

Norway

200

130

300

175

710

670

500

774

USA

2,340

1,580

1,800

2,350

1,700

1,675

750

0

Totals

14,902

14,800

12,682

9,765

10,690

11,385

9,845

5,832

Table 9b: Seasonal variation in numbers (000’s) and sources of ova imported into Scotland from outwith GB during 2017

Month

Denmark

Isle of Man

N. Ireland

Norway

January

420

0

740

350

February

730

300

0

0

March

60

0

110

424

April

0

0

0

0

May

930

0

20

0

June

0

0

0

0

July

0

0

120

0

August

0

0

0

0

September

0

0

0

0

October

230

0

250

0

November

298

0

0

0

December

850

0

0

0

Totals

3,518

300

1,240

774

Table 9c: Number (000’s) and sources of fish imported into Scotland from outwith GB during 2010-2017

Source

2010

2011

2012

2013

2014

2015

2016

2017

N. Ireland

<1

72

155

537

674

746

592

486

Republic of Ireland

2

0

0

0

0

0

0

0

Suppliers within the European Union (EU) accounted for 86.7% of ova imported into Scotland during 2017 with Norway accounting for the remaining 13.3%. To maintain their ability to regulate production throughout the year and produce a constant supply of fish for their markets, producers have to rely upon supplies of out of season ova. In recent years there has been a trend for producers to import part grown rainbow trout into Scotland from outwith GB.

Trade in Fry and Fingerlings

Table 10: Number (000’s) of fry and fingerlings traded during 2006-2017

Year

Fry and fingerlings bought

Total number bought

Total number sold

All female diploid no. (%)

Triploid no. (%)

Mixed sex diploid no. (%)

2006

19,731 (89)

1,675 (7)

790 (4)

22,196

20,460

2007

14,830 (89)

1,140 (7)

675 (4)

16,645

23,631

2008

24,298 (95)

1,082 (4)

118 (0.5)

25,498

31,036

2009

21,113 (94)

1,358 (6)

0

22,471

20,597

2010

15,539 (95)

585 (4)

141 (1)

16,265

14,686

2011

16,288 (88.5)

1,970 (10.7)

138 (0.8)

18,396

16,612

2012

12,543 (91)

1,226 (9)

0

13,769

12,088

2013

6,734 (84)

1,239 (16)

0

7,973

6,749

2014

5,911 (81)

1,423 (19)

0

7,334

6,719

2015

6,104 (87)

598 (9)

290 (4)

6,992

6,971

2016

6,452 (85)

1,125 (15)

0

7,577

6,779

2017

3,989 (73)

1,446 (27)

0

5,435

4,145

The established trade between hatcheries and on-growing farms continued in 2017. Some companies specialised in the production of fry and fingerlings. The total number of fry and fingerlings bought decreased by 28.3% while the number sold decreased by 38.9%. The disparity between supply and demand is due to trade with England and Wales.

Use of Vaccines

Table 11: Number of sites rearing fish vaccinated against enteric redmouth disease (ERM) and number of fish vaccinated (millions) during 2006-2017

Year

2006

2007

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

No. of sites

31

28

28

31

27

26

24

19

21

17

18

18

No. of fish

36.4

41.4

29.1

27.5

20.0

20.3

20.4

9.9

10.0

8.3

7.3

5.4

Vaccines continued to be used as a preventative treatment against enteric redmouth disease (ERM), a potentially serious bacterial infection, caused by Yersinia ruckeri. Vaccination is generally carried out as a bath treatment at the fingerling stage, although some vaccines are administered by intra-peritoneal injection. A total of 5.4 million fish were vaccinated on 18 sites.

Organic Production

Of the 44 sites recorded as being active in rainbow trout production in 2017, none were certified as organic.

Escapes

There was one incident involving the loss of 216 fish from a rainbow trout site in 2017.


Contact

Lorna.Munro@gov.scot