Post on 03-Jul-2020
John Bonardelli, Shellfish Solutions AS Offshore Mussel Farming: 7 Feb’11
Role of extension services to support
Offshore Mussel Culture
Offshore and 400 submerged lines
Offshore double lines
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
Competence building & Biomass monitoring project :9 counties involved !
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
A) Switch over from Spanish to continuous
Shellfish Solutions AS
Spanish continuous
Increasing efficiency with scale-up to higher output
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?
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?
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
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
c) Practical examples that improve sock yields
Shellfish Solutions AS
Follow up quality control of socking for density at start, then 3 wks later
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
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!
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
Rewards of extension work
Thank you
Shellfish Solutions AS
Norway 7020
(47) 986 96 650
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Shellfish Solutions AS