role of extension services to support offshore mussel culture · 1-2 local processors who buy...
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John Bonardelli, Shellfish Solutions AS Offshore Mussel Farming: 7 Feb’11
Role of extension services to support
Offshore Mussel Culture
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Offshore and 400 submerged lines
Offshore double lines
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Shellfish Solutions AS
Move offshore requires long term support
Too much to know- can’t do it alone!
A) Extension as a role
B) Example of Norwegian Extension project
C) Practical examples that impact on successs
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Competence building & Biomass monitoring project :9 counties involved !
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Biomass control & Traceability of mussels (1 to 3 yr) Building knowledge & competence with serious growers and processors
Demo site
- A
Demo Site
- B
Demo Site
- C
Demo Site
- D
Extension officers
Field support & sampling
1-2 local processors who buy mussels from active
growers in the program to improve sales relations
Growers
committed
to learn &
do better
Skjelldyrker
med annen
forpliktelse
dyrkere
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A) Switch over from Spanish to continuous
Shellfish Solutions AS
Spanish continuous
Increasing efficiency with scale-up to higher output
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Common method for growers to harvest & grade mussels for processors
What is the performance of
the Spanish declumper-
grader and how do results
affect the yields?
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Franken Declumper-Grader machine with exchangeable
sorting barrels for small spat and commercial size mussels
How does the performance
of the Franken declumper-
grader compare. Can
results affect final yields?
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4 mm
waste9 mm
Small spat
14 mm
Large spat
Grading spat
for socking:
Harvesting/grading of
commercial mussels:
14 mmLarge spat
May resock?
17 mm Undersized
Waste/resock?
>>17 mmCommercial
Market value
clumps
Had removable sorting barrels for socking small mussel spat (15-35mm), or
for grading commercial mussels (45+ mm) to send to processors
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Move to continuous socking- Had to prove it worked
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
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c) Practical examples that improve sock yields
Shellfish Solutions AS
Follow up quality control of socking for density at start, then 3 wks later
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Historic meat yield (52-57mm) mussels, Huken, mid-Norway (2002-2006)
12
16
20
24
28
32
36
04-
Jan-
02
04-
Apr-
02
03-
Jul-
02
01-
Oct-
02
30-
Dec-
02
30-
Mar-
03
28-
Jun-
03
26-
Sep-
03
25-
Dec-
03
24-
Mar-
04
22-
Jun-
04
20-
Sep-
04
19-
Dec-
04
19-
Mar-
05
17-
Jun-
05
15-
Sep-
05
14-
Dec-
05
14-
Mar-
06
12-
Jun-
06
10-
Sep-
06
% m
eat
yie
ld
in
Euro index
Regular sampling by grower shows :
a) 2-yr trend of high % meat yield
&
b) Years with poor market quality
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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!
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ASK-A-
01
MOR-B-01
Near land 50m 100 150 200m 250 Offshore5m
3m
1m
Distribution pattern for meat mass (g) for 50-55mm socked mussels during fall’05 on MOR-B-01
3,00-3,30 g
2,70-3,00 g
2,40-2,70 g
2,10-2,40 g
1,80-2,10 g
MOR-B-01
Incoming flow 50 100m 150 200 250m 300 Outgoing flow
5m
3m
1m
ASK-A-01
Askerholmen
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Rewards of extension work
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Thank you
Shellfish Solutions AS
Norway 7020
(47) 986 96 650
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Shellfish Solutions AS