Impact of surface floats on commercial mussel yields in high-energy - - PowerPoint PPT Presentation

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Impact of surface floats on commercial mussel yields in high-energy - - PowerPoint PPT Presentation

Oct 23, 2023 319 likes •515 views

Impact of surface floats on commercial mussel yields in high-energy sites Offshore Aquaculture Conf Barcelona 6 Apr 2016 John C Bonardelli; Shellfish Solutions AS What makes $$ for offshore shellfish growers? -Stable longlines -Low

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SLIDE 1

Impact of surface floats on commercial mussel yields in high-energy sites

John C Bonardelli; Shellfish Solutions AS

Offshore Aquaculture Conf Barcelona 6 Apr 2016

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SLIDE 2

What makes $$ for offshore shellfish growers?

John C Bonardelli; Shellfish Solutions A Offshore Aquaculture Conf Barcelona 6 Apr 2016

  • Stable longlines
  • Low maintenance costs
  • Boats match production objectives
  • Socking strategies for short time-to-market

High commercial yields

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SLIDE 3

Evaluation: 5 farms using JFC & other floats

Outer Killary Pat Lydon

Dec 2009 Sep 2010

Muskerry Bay Finnbar Daly

Dec 2009

Shellfish Solutions AS Facebook: ’Mussel talk’

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SLIDE 4

Evaluation of farms Roaring Waters

Dec 2009

  • AMC mussels
  • Turkhead
  • Colin Whooley

Shellfish Solutions AS Facebook: ’Mussel talk’

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SLIDE 5

They float, so what’s the difference?

Float type has different structural characteristics impacting line stability

ROM Blue-barrel JFC GEM

What are the best indicators to show that one float type

  • utperforms

another ?

Shellfish Solutions AS Facebook: ’Mussel talk’

Every float company sells the best product. Growers use them wrong!

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SLIDE 6

We use standardized sampling protocols to identify the impact of floats on commercial yields and quality

Let the mussels do the talking!

Shellfish Solutions AS Facebook: ’Mussel talk’

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SLIDE 7

Standardized samples for depths 1,4, 9m below mainline

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SLIDE 8

Declump & clean shells in bucket

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SLIDE 9

From dirty to clean

Code sample bag, Clean shells, Ready to measure

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SLIDE 10

Compare cooked meat & shell mass by 5mm size-class

Meat content: Strong indicator of food availability in last 3-5 weeks Shell mass: Great indicator of past seasonal conditions; currents, sediment, stress due to waves, socking...

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SLIDE 11

Objectives

 To compare benefits of JFC ribbed floats to

  • ther mainstream products in Ireland

 To use measurable biological factors for

unbiased comparison of commercial yields

 Confirm Float performance (to grower)

  • Highest yields /m/line
  • Consistent size range
  • Lowest upkeep costs
  • Shortest time to market

Shellfish Solutions AS Facebook: ’Mussel talk’

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SLIDE 12

Comparing sample mass

Wet mass (Kg/m) for mussel samples taken on ROM float lines- Killary 8 Sep'10

  • 3,0

6,0 9,0 12,0 Inner-01-C ROM (east)- 1m Inner-01-C ROM (east)- 9m Mid-01-B ROM -1m Mid-01-B ROM -9m Outer-01-A (west ROM) 1m Outer-01-A (west ROM) 9m Outer-06-A (west ROM) 1m Outer-06-A (west ROM) 9m Outer-01-A spat'10 west- JFC) 1m Inner-01-C spat'10 east- JFC 1m Total wet mass (Kg)

ROM 14,5mo

ROM 25,6mo

lite 400 lite 400 12,4mo ROM

ROM 14,5mo ROM 25,6mo

Wet mass for (Kg/m) for mussel samples taken on JFC float lines- Killary 8Sep'10

  • 3,0

6,0 9,0 12,0

Inner-02-C (east-JFC) 1m Inner-02-C (east-JFC) 4m Inner-02-C (east-JFC) 9m Mid-02-C (mid JFC) 1m Mid-02-C (mid JFC) 4m Mid-02-C (mid JFC) 9m Outer-02-A west-JFC) 1m Outer-02-A west-JFC) 9m

Total wet mass (Kg)

JFC 14,5mo

JFC JFC

JFC 14,5mo JFC 15,5mo

JFC 14,5mo

ROM-01 ‘inconsistent’ Varied wet weights: 1 & 9m & east to west between 6 & 12 kg/m ROM-06 west varied: at 1 & 9m (3 & 9kg/m). JFC ‘consistent’ All samples 1,4, 9 m weighed over 9kg/m All tripled mass since Dec’09 JFC always among highest mass at each site

Shellfish Solutions AS Facebook: ’Mussel talk’

ROM JFC ROM JFC

For simplicity, we compare and show results for ROM & JFC floats

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SLIDE 13

Commercial volumes between ROM & JFC

ROM-01 JFC-02

avg yield: 7,8 kg/m 5200m socks 40Tm avg yield: 9,2 kg/m 5200m socks 48Tm

Wet mussel mass from Outer Killary within 20hrs 8Sep'10

3,0 6,0 9,0 12,0 15,0 18,0

>35-40 >40-45 >45-50 >50-55 >55-60 >60-65

size class (mm)

mean total wet mass g

JFC avg g 1m JFC avg g 4m JFC avg g 9m ROM avg g 1m ROM avg g 9m Linear (Best avg)

>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: (890/m) 4m Pergolini 8mm JFC MeanSize: (50,1 mm)

Shellfish Solutions AS Facebook: ’Mussel talk’

+20%

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SLIDE 14

Size-distribution differences between ROM & JFC

ROM-01 JFC-02

Avg yield: 7,8 kg/m Big variations Slower time to market Avg yield: 9,2 kg/m Same everywhere More even density

Mid-01-B ROM -1m, OnlineMus, DIS: 01-jul-09 Sampled: 08-sep-10 (14,5 mon.-start)" 10 20 30 40 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: (725/m) 1m Pergolini 8mm JFC MeanSize: (43,5 mm) % frequency Outer-01-A (west ROM) 1m, OnlineMus, DIS: 01-aug-08 Sampled: 08-sep-10 (25,6 mon.- start)" 10 20 30 40 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: (2490/m) 1m Pergolini 8mm ROM MeanSize: (35,5 mm) % frequency JFC-02-C (mid) 9m, Online Mussel, DIS: 01-jul-09 Sampled: 08-sep-10 (14,5 mon.- start)" 10 20 30 40 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: (849/m) 9m Pergolini 8mm JFC MeanSize: (51,7 mm) % frequency JFC-02-C (mid) 4m, Online Mussel, DIS: 01-jul-09 Sampled: 08-sep-10 (14,5 mon.- start)" 10 20 30 40 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: (1252/m) 4m Pergolini 8mm JFC MeanSize: (47,6 mm) % frequency

JFC Produce larger mussels FASTER!

Shellfish Solutions AS Facebook: ’Mussel talk’

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Compare commercial sizes to 2nd set spat

Number of 2010 2nd set spat by depth for east, mid & west sections JFC-02

108 38 603 68 163 99 46 53

  • 100

200 300 400 500 600 700

east 10-38mm mid 10-38mm west 10-38mm JFC -02- 1m spat JFC -02- 4m spat JFC -02- 9m spat Number of commercial mussels by depth for east, mid & west sections JFC-02

710 639 519 704 947 731 681 791

  • 200

400 600 800 1 000 1 200

east 45-65mm mid 45-65mm west 45-65mm JFC -02- 1m JFC -02- 4m JFC -02- 9m Number of 2010 2nd set spat by depth for east, mid & west sections ROM-01, & ROM

1 255 69 342 1 532 219 2 078

  • 300

600 900 1 200 1 500 1 800 2 100

east 10-38mm mid 10-38mm west 10-38mm R

ROM -01- 1m spt ROM -01- 9m spt

Number of commercial mussels by depth for east, mid & west sections ROM-01, & ROM

582 416 466 410 165 960

  • 200

400 600 800 1 000 1 200

east 45-65mm mid 45-65mm west 45-65mm

ROM -01- 1m ROM -01- 9m

ROM-01 JFC-02

  • Commercial density VARIABLE, decreasing westward
  • LOSS of larger mussels typical at many sites (floats)

The 2nd set at 1m was 20x greater at east end, and 2-3x higher on west end, than on JFC line

  • Commercial density on JFC is HIGH >700/m
  • Densities CONSISTENT from east to west and depth

Mid-01-B ROM -1m, OnlineMus, DIS: 01-jul-09 Sampled: 08-sep-10 (14,5 mon.-start)" 10 20 30 40 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: (725/m) 1m Pergolini 8mm JFC MeanSize: (43,5 mm) % frequency JFC-02-C (mid) 4m, Online Mussel, DIS: 01-jul-09 Sampled: 08-sep-10 (14,5 mon.- start)" 10 20 30 40 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: (1252/m) 4m Pergolini 8mm JFC MeanSize: (47,6 mm) % frequency

Shellfish Solutions AS Facebook: ’Mussel talk’

Mid-01-B ROM -1m, OnlineMus, DIS: 01-jul-09 Sampled: 08-sep-10 (14,5 mon.-start)" 10 20 30 40 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: (725/m) 1m Pergolini 8mm JFC MeanSize: (43,5 mm) % frequency JFC-02-C (mid) 4m, Online Mussel, DIS: 01-jul-09 Sampled: 08-sep-10 (14,5 mon.- start)" 10 20 30 40 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: (1252/m) 4m Pergolini 8mm JFC MeanSize: (47,6 mm) % frequency

Spat Commercial

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SLIDE 16

Differences in meat content for same size mussels

55-60mm 40-45mm

Comparison of standard cooked meat with depth for JFC & ROM lines, 8 Sep'10

  • 0,5

1,0 1,5 2,0 2,5 3,0 3,5 4,0 4,5 >40-45 >55-60 size class (mm) Avg cooked meat mass g

jfc-02-1m jfc-02-9m ROM-01-1m ROM-01-9m

1m 9m 1m 9m 1m 9m 1m 9m

Small: no difference in meat content with depth or between ROM & JFC lines

Commercial: JFC meat was 7% heavier

at 1m, 4% heavier than ROM at 9m: less stress & more time to feed

Shellfish Solutions AS Facebook: ’Mussel talk’

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Changes in shell mass for JFC & ROM in 9 months

a) Large mussels on ROM fall-off after socking, fast growing 40-45mm: thinner and lighter b) JFC mussels had stable growth over time, no fall-off, and continue to gain mass! 1- JFC shells over 3% heavier than ROM for 40-45mm

Comparison of Dec'09 to Sep'10 >40-45mm cooked shells for JFC & ROM lines

  • 0,5

1,0 1,5 2,0 2,5 3,0 Sept'10 Dec'09 size class (mm) Avg cooked shell mass (g)

jfc-02-1m jfc-02-9m ROM-01-1m ROM-01-9m

1m 9m 1m 9m 1m 9m 1m 9m

No evident difference in shell mass at 1m & 9m for mussels of the same float type, or east to west along the same line

2- JFC shells over 17% heavier

=1.7Tm > value/10Tm harvest

Shellfish Solutions AS Facebook: ’Mussel talk’

rom JFC rom JFC

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Impact of surface floats on commercial mussel yields in high-energy sites

This INDEPENDENT EVALUATION substantiates the claim that JFC ribbed-floats:

  • 1. increase commercial yields/meter beyond previous observations for socked mussels.
  • 2. produce higher commercial yields in less time

3. JFC-floated lines show: – lower maintenance costs with no float losses over time – no handle defects or breakage of ropes attached to mainline – lower ‘new’ spat settlement (2nd set) than socks with similar histories – equivalent or higher meat content for range of size-classes – more consistent shell growth, which adds mass to final product – higher densities of commercial sizes, reflecting stable growth & limited fall-off – over 9kg/m harvest-ready commercial yields for 5200m (48Tm) of socked mussels ------------ 20-47% more yield than all other floats

Shellfish Solutions AS Facebook: ’Mussel talk’

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SLIDE 19

Comparative evaluation shows selection of right floats impacts growth and commercial yield and makes you more $$

Shellfish Solutions AS john@shellfishsolutions.com

Thank you

Take home: In your existing offshore production, I can increase your commercial yields at least 30-50%