John Bonardelli, Shellfish Solutions AS Offshore Mussel Farming: 7 Feb’11

Choosing Effective Technologies to

Develop Offshore Mussel Culture

Offshore and 400 submerged lines

Offshore double lines

Shellfish Solutions AS

Move offshore requires a re.think

Must produce more with less!

A) Continuous socking – What are the options?

B) What didn’t work - not always fault of socking!

Materials, methods, flotation

C) Practical issues that impact on sock yields

Quality socking

Adapted flotation

Benefits of Sampling

A) Continuous socking – What are the options?

Shellfish Solutions AS

Going from manual verticaltube socks to continuous

Testing efficiency with scale-up to higher output

A) Continuous socking – What are the options?

Shellfish Solutions AS

Spanish continuous: easy use of more size ranges anytime

Increasing efficiency with scale-up to higher output

Use more months, since seed does not need to move out

A) Continuous socking – What are the options?

Shellfish Solutions AS

Automatic continuous: High output, more sizes anytime

Increasing efficiency with scale-up, least labour required

Use more months of year, reusable, mechanized, fast

Materials & methods

Socking Mishaps

Winter storm + floatationWrong timing for socking

Wrong densities

B) What didn’t work - not always fault of socking!

Good sock methods not always enough

0

5

10

15

20

25

30

35

40

45

50

55

60

Apr-01 Aug-01 Dec-01 Apr-02 Aug-02 Nov-02 Mar-03 Jul-03 Nov-03 Mar-04 Jul-04 Nov-04

Me

an

sh

ell le

ng

th (

mm

)

Portion of collectors socked - (no size grading)

0

10

20

30

>10-

15

>15-

20

>20-

25

>25-

30

>30-

35

>35-

40

>40-

45

>45-

50

>50-

55

>55-

60

>60-

65

% fre

qu

en

cy

No difference in growth or yield: poor grading is wrong method!

B) What didn’t work - not always fault of socking!

1) Use of wrong floatation technologies can decrease

yields & profits, increase costs!

Should use right floats to hold mussels, get maximum yields and value!

B) What didn’t work - not always fault of socking!

c) Practical examples that improve sock yields

Shellfish Solutions AS

Adapted floatation is cost-effective

Killary Harbour -Galway

Roaring water -Cork

c) Practical examples that improve sock yields

Sampling to compare JFC and thin-walled floats

Do costlier JFC floats really increase commercial value growers?

Measured

size distribution

density

commercial biomass (yield)

fall-off

time to market

c) Practical examples that improve sock yields

Typical biomass differences with JFC-ribbed vs barrel floats

Larger size

Higher densities

30-50mm

-800+ vs 238 /m

-35% vs 3% comm

Faster growth

Less fall-off

Commercial yields

10-30% > / JFC line

Outer-02-A(end) 1m (Pegolini 8mm JFC)

Density/m 1020

Size class % of total No. Shells/ m

Klasse mm % frekvens ## Salgbar /m

>10-15 0,0 0

>15-20 1,9 19

>20-25 4,8 49

>25-30 3,8 39

>30-35 21,0 214

>35-40 33,3 340

>40-45 27,6 282

>45-50 6,7 68

>50-55 1,0 10

>55-60 0,0 0

>60-65 0,0 0

>65-70 0,0 0

>70++ 0,0 0

sum 100,0 1020 /m

337 /ft

10<35mm 31 % 321 /m

40<70mm 35 % 360 /m

Outer-01-A(end) 1m (Pegolini 8mm ROM)

Density/m 413

Size class % of total No. Shells/ m

Klasse mm % frekvens ## Salgbar /m

>10-15 0,9 4

>15-20 5,5 23

>20-25 13,6 56

>25-30 22,7 94

>30-35 40,9 169

>35-40 13,6 56

>40-45 2,7 11

>45-50 0,0 0

>50-55 0,0 0

>55-60 0,0 0

>60-65 0,0 0

>65-70 0,0 0

>70++ 0,0 0

sum 100,0 413 /m

136 /ft

10<35mm 84 % 346 /m

40<70mm 3 % 11 /m

Outer-02-A(end), Online Mussel, DIS: 01-jul-09 Sampled: 10-des-09 (5,4 mon.-start)"

0

10

20

30

40

50

0-5 >5-10 >10-

15

>15-

20

>20-

25

>25-

30

>30-

35

>35-

40

>40-

45

>45-

50

>50-

55

>55-

60

>60-

65

>65-

70

>70

Density: (1020/m) 1m (Pegolini 8mm JFC) MeanSize: (37,3 mm)

% F

rek

ven

s

Outer-01-A(end), Online Mussel, DIS: 01-jul-09 Sampled: 10-des-09 (5,4 mon.-start)"

0

10

20

30

40

50

0-5 >5-10 >10-

15

>15-

20

>20-

25

>25-

30

>30-

35

>35-

40

>40-

45

>45-

50

>50-

55

>55-

60

>60-

65

>65-

70

>70

Density: (413/m) 1m Pegolini 8mm ROM MeanSize: (30 mm)

% f

req

uen

cy

ASK-B-01-C, Afjord, Utsett: 13-des-05 Prøve: 13-nov-07 (23,3 mo.-start)"

0

10

20

30

40

50

0-5 >5-10 >10-15 >15-20 >20-25 >25-30 >30-35 >35-40 >40-45 >45-50 >50-55 >55-60 >60-65 >65-70 >70

Tethet: (969/m) z=1m SVKB EXP.high Middel: (40,2 mm)

% F

rekven

s 556 salgbar skjell/m

ASK-B-01-C, Afjord, Utsett: 13-des-05 Prøve: 13-nov-07 (23,3 mo.-start)"

0

10

20

30

40

50

0-5 >5-10 >10-15 >15-20 >20-25 >25-30 >30-35 >35-40 >40-45 >45-50 >50-55 >55-60 >60-65 >65-70 >70

Tethet: (520/m) z=3m SVKB EXP.high Middel: (45,8 mm)

% F

rek

ven

s 357 salgbar skjell/m

ASK-B-01-C, Afjord, Utsett: 13-des-05 Prøve: 13-nov-07 (23,3 mo.-start)"

0

10

20

30

40

50

0-5 >5-10 >10-15 >15-20 >20-25 >25-30 >30-35 >35-40 >40-45 >45-50 >50-55 >55-60 >60-65 >65-70 >70

Tethet: (543/m) z=5m SVKB EXP Middel: (47,2 mm)

% f

req

uen

cy 407 salgbar skjell/m

Sampling socks at different depth- know what harvest!

Sampling your offshore sites is key:Know when/why mussels give higher value & select quality

When better declumping-grading Use Narrow size range Use proper sock rope

Get: High % commercial yields Better control of fouling Cost-effective harvest Better risk management

Automatic socking allows for

rapid response: import spat,

fouling, 2nd set, depth unlimited,

Play w density- all same material

Thank you

Shellfish Solutions AS

Norway 7020

(47) 986 96 650

Professional networks- please joinwww.musseltalk.com

Facebook: ”mussel talk”

Linked In: ”John Bonardelli (mussel talk)”

Shellfish Solutions AS