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Scottish Shellfish Farm Production Survey 2011

Scottish Shellfish Farm Production Survey 2011 produced by Marine Scotland Science

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// PRODUCTION

The survey indicates that the shellfish species cultivated in Scottish waters in 2011 were:

Mussel: Mytilus spp.
Pacific oyster: Crassostrea gigas
Native oyster: Ostrea edulis
Queen scallop: Chlamys opercularis
Scallop Pecten maximus

Production was dominated by mussel and Pacific oyster, although small quantities of scallop, queen scallop (queen) and native oyster were also produced. The 2011 production data for each species by region are given in Table 1.

TABLE 1

SCOTTISH SHELLFISH PRODUCTION BY REGION, 2011.

Region Businesses Mussel Pacific oyster Native oyster Queen Scallop
(tonnes) (000s) (000s) (000s) (000s)
Tonnes Table tonnes on-growing 000s Table 000s on-growing 000s Table 000s on-growing 000s Table 000s on-growing 000s Table 000s on-growing
Highland 46 692 75 461 1,360 0 0 2 0 78 104
Orkney 5 0 0 0 0 0 0 0 0 0 0
Shetland 29 4,567 178 25 0 0 0 0 0 0 0
Strathclyde 56 736 3 2,635 40 350 1 25 0 0 0
Western Isles 17 1,001 26 15 0 0 0 0 0 0 0
All Scotland 153 6,996 282 3,136 1,400 350 1 27 0 78 104
Weight (tonnes) 6,996 282 251 28 1 9

NB: THIS REPORT LISTS REGIONS WITH ACTIVE AUTHORISED SHELLFISH FARMS.

CONVERSION TO WEIGHT USED THE FOLLOWING ASSUMPTIONS (BASED ON INDUSTRY FIGURES): INDIVIDUAL OYSTERS AVERAGED 80G; INDIVIDUAL SCALLOPS AVERAGED 120G; INDIVIDUAL QUEENS AVERAGED 40G.

TABLE = SALES DIRECTLY FOR HUMAN CONSUMPTION; ON-GROWING = SALES TO OTHER BUSINESSES FOR ON-GROWING.

Table production by species is illustrated in Figure 1 (see page 4), while trends in production for the table market and on-growing in Scotland are presented in Table 2.

TABLE 2

Trends in production data for the table and on-growing 2002-2011.

For the table 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 %change 10-11
Pacific oyster (000s) 3,114 3,488 3,586 3,070 3,138 2,603 3,093 2,900 3,008 3,136 +4
Native oyster (000s) 191 161 105 162 300 273 250 490 350 350 0
Queen (000s) 472 1,124 1,118 1,441 1,510 384 687 138 184 27 -85
Scallop (000s) 323 180 85 100 87 15 15 35 64 78 +22
Mussel (tonnes) 3,236 3,632 4,223 4,135 4,219 4,806 5,869 6,302 7,199 6,996 -3
For on-growing 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011
Pacific oyster (000s) 1,578 2,640 2,510 1,467 1,685 945 26 45 1,633 1,400
Native oyster (000s) 0 0 0 0 0 10 0 0 300 1
Queen (000s) 320 0 600 0 0 0 0 30 0 0
Scallop (000s) 147 86 80 382 287 45 0 0 0 104
Mussel (tonnes) 4 38 61 20 68 44 30 391 175 282

Mussel production decreased by 3% from the 2010 total and survey responses attribute the cause of the decrease to include: environmental effects such as variation of spat settlement in time and place in recent years; the detection of toxins which hampered sales, and several businesses which ceased trading (see figure 1). The greatest contribution in regional mussel production was from Shetland, accounting for 4,567 tonnes or 65% of Scotland's total. Pacific oyster production increased by 4% from 2010. The Strathclyde region produced about 84% of Scotland's farmed Pacific oysters. Queen production fell by 85% since 2010, a contributing factor was reported as poor spat settlement, while production of farmed scallops increased by 22%, continuing to target niche markets. Native oyster production remained the same accounting for a small percentage of total oyster production, however, demand for this species continues to be high.

FIGURE 1 Table production by species 2002-2011.

FIGURE 1
TABLE PRODUCTION BY SPECIES 2002-2011.

Prices of farmed shellfish fluctuated throughout the year. Their value at first sale was estimated from the following figures (Supplied by industry. These vary with demand, level of production and geographical area of orgin). The price of Pacific oyster was around £0.40 per shell; native oyster, £0.40 per shell; scallop, £1.15 per shell; queen scallop sold for approximately £0.10 per shell; and mussels from £900 to more than £1,700 per tonne. The value of the table trade is estimated from the production figures shown in Table 1.

Mussel: £8.3 million Pacific oyster: £1.25 million
Native oyster: £0.14 million Scallop: £0.09 million
Queen: £0.003 million

The 2011 total value, at first sale for all species, was estimated at £9.8 million up from £8.3 million in 2010.

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