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

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 maintenance costs -Boats match production objectives -Socking strategies for short time-to-market High commercial yields John C Bonardelli; Shellfish Solutions A Offshore Aquaculture Conf Barcelona 6 Apr 2016

Evaluation: 5 farms using JFC & other floats Outer Killary Pat Lydon Dec 2009 Sep 2010 Muskerry Bay Finnbar Daly Dec 2009 Facebook: ’Mussel talk’ Shellfish Solutions AS

Evaluation of farms Roaring Waters Dec 2009 • AMC mussels • Turkhead • Colin Whooley Facebook: ’Mussel talk’ Shellfish Solutions AS

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 outperforms another ? Every float company sells the best product. Growers use them wrong! Facebook: ’Mussel talk’ Shellfish Solutions AS

Let the mussels do the talking! We use standardized sampling protocols to identify the impact of floats on commercial yields and quality Facebook: ’Mussel talk’ Shellfish Solutions AS

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

Declump & clean shells in bucket

From dirty to clean Code sample bag, Clean shells, Ready to measure

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...

Objectives  To compare benefits of JFC ribbed floats to other 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 Facebook: ’Mussel talk’ Shellfish Solutions AS

Comparing sample mass ROM Wet mass (Kg/m) for mussel samples taken on ROM float lines- Killary 8 Sep'10 12,0 ROM ROM 9,0 Total wet mass (Kg) ROM 14,5mo ROM- 01 ‘inconsistent’ 25,6mo Varied wet weights: 6,0 ROM 1 & 9m & east to west lite 400 14,5mo lite 400 3,0 between 6 & 12 kg/m ROM 12,4mo 25,6mo - ROM-06 west varied: Inner-01-C Inner-01-C Mid-01-B Mid-01-B Outer-01-A Outer-01-A Outer-06-A Outer-06-A Outer-01-A Inner-01-C For simplicity, we compare and show ROM (east)- ROM (east)- ROM -1m ROM -9m (west ROM) (west ROM) (west ROM) (west ROM) spat'10 west- spat'10 east- at 1 & 9m (3 & 9kg/m). 1m 9m 1m 9m 1m 9m JFC) 1m JFC 1m results for ROM & JFC floats JFC ROM JFC Wet mass for (Kg/m) for mussel samples taken on JFC float lines- Killary 8Sep'10 12,0 JFC JFC ‘consistent’ 14,5mo 9,0 JFC Total wet mass (Kg) JFC JFC JFC JFC All samples 1,4, 9 m 15,5mo 14,5mo 14,5mo 6,0 weighed over 9kg/m All tripled mass since 3,0 Dec’09 - JFC always among highest Inner-02-C Inner-02-C Inner-02-C Mid-02-C (mid Mid-02-C (mid Mid-02-C (mid Outer-02-A Outer-02-A (east-JFC) 1m (east-JFC) 4m (east-JFC) 9m JFC) 1m JFC) 4m JFC) 9m west-JFC) 1m west-JFC) 9m mass at each site Facebook: ’Mussel talk’ Shellfish Solutions AS

Commercial volumes between ROM & JFC ROM-01 JFC-02 Wet mussel mass from Outer Killary within 20hrs 8Sep'10 JFC avg g 1m 18,0 JFC avg g 4m JFC avg g 9m 15,0 mean total wet mass g ROM avg g 1m ROM avg g 9m 12,0 Linear (Best avg) 9,0 6,0 >5- >10- >15- >20- >25- >30- >35- >40- >45- >50- >55- >60- >65- >70 10 15 20 25 30 35 40 45 50 55 60 65 70 Density: (890/m) 4m Pergolini 8mm JFC MeanSize: (50,1 mm) 3,0 >35-40 >40-45 >45-50 >50-55 >55-60 >60-65 size class (mm) avg yield: 7,8 kg/m avg yield: 9,2 kg/m 5200m socks 5200m socks +20% 40Tm 48Tm Facebook: ’Mussel talk’ Shellfish Solutions AS

Size-distribution differences between ROM & JFC ROM-01 JFC-02 Mid-01-B ROM -1m, OnlineMus, DIS: 01-jul-09 Sampled: 08-sep-10 (14,5 mon.-start)" JFC-02-C (mid) 9m, Online Mussel, DIS: 01-jul-09 Sampled: 08-sep-10 (14,5 mon.- 40 start)" 40 30 30 % frequency % frequency 20 20 10 10 0 0 0-5 >5-10 >10- >15- >20- >25- >30- >35- >40- >45- >50- >55- >60- >65- >70 0-5 >5- >10- >15- >20- >25- >30- >35- >40- >45- >50- >55- >60- >65- >70 15 20 25 30 35 40 45 50 55 60 65 70 10 15 20 25 30 35 40 45 50 55 60 65 70 Density: (725/m) 1m Pergolini 8mm JFC MeanSize: (43,5 mm) Density: (849/m) 9m Pergolini 8mm JFC MeanSize: (51,7 mm) Outer-01-A (west ROM) 1m, OnlineMus, DIS: 01-aug-08 Sampled: 08-sep-10 (25,6 mon.- start)" JFC-02-C (mid) 4m, Online Mussel, DIS: 01-jul-09 Sampled: 08-sep-10 (14,5 mon.- 40 start)" 40 30 30 % frequency % frequency 20 20 10 10 0 0 0-5 >5-10 >10- >15- >20- >25- >30- >35- >40- >45- >50- >55- >60- >65- >70 0-5 >5- >10- >15- >20- >25- >30- >35- >40- >45- >50- >55- >60- >65- >70 15 20 25 30 35 40 45 50 55 60 65 70 10 15 20 25 30 35 40 45 50 55 60 65 70 Density: (2490/m) 1m Pergolini 8mm ROM MeanSize: (35,5 mm) Density: (1252/m) 4m Pergolini 8mm JFC MeanSize: (47,6 mm) Avg yield: 9,2 kg/m Avg yield: 7,8 kg/m Same everywhere Big variations JFC Produce larger mussels FASTER! More even density Slower time to market Facebook: ’Mussel talk’ Shellfish Solutions AS

Compare commercial sizes to 2 nd set spat ROM-01 JFC-02 Number of 2010 2nd set spat by depth for east, mid & west sections JFC-02 Number of 2010 2nd set spat by depth for east, mid & west sections ROM-01, & ROM 700 2 100 Spat JFC -02- 1m spat 2 078 ROM -01- 1m spt 603 600 1 800 JFC -02- 4m spat ROM -01- 9m spt 1 532 JFC -02- 9m spat 500 1 500 1 255 1 200 400 900 300 600 200 163 342 108 99 219 300 100 68 53 46 69 38 - - east 10-38mm mid 10-38mm west 10-38mm R east 10-38mm mid 10-38mm west 10-38mm The 2nd set at 1m was 20x greater at east end, and 2-3x higher on west end, than on JFC line Mid-01-B ROM -1m, OnlineMus, DIS: 01-jul-09 Sampled: 08-sep-10 (14,5 mon.-start)" Mid-01-B ROM -1m, OnlineMus, DIS: 01-jul-09 Sampled: 08-sep-10 (14,5 mon.-start)" JFC-02-C (mid) 4m, Online Mussel, DIS: 01-jul-09 Sampled: 08-sep-10 (14,5 mon.- JFC-02-C (mid) 4m, Online Mussel, DIS: 01-jul-09 Sampled: 08-sep-10 (14,5 mon.- Number of commercial mussels by depth for east, mid & west sections JFC-02 40 Number of commercial mussels by depth for east, mid & west sections ROM-01, & ROM 40 start)" start)" 1 200 1 200 40 40 Commercial JFC -02- 1m ROM -01- 1m 960 JFC -02- 4m 1 000 1 000 947 ROM -01- 9m 30 30 JFC -02- 9m 30 30 791 800 % frequency 800 % frequency 731 % frequency % frequency 710 704 681 639 20 20 582 20 20 600 600 519 466 416 410 400 400 10 10 10 10 165 200 200 0 0 0 0 0-5 0-5 >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 - - 0-5 >5-10 >10- >15- >20- >25- >30- >35- >40- >45- >50- >55- >60- >65- >70 0-5 >5-10 >10- >15- >20- >25- >30- >35- >40- >45- >50- >55- >60- >65- >70 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 east 45-65mm mid 45-65mm west 45-65mm 15 20 25 30 35 40 45 50 55 60 65 70 15 20 25 30 35 40 45 50 55 60 65 70 east 45-65mm mid 45-65mm west 45-65mm Density: (1252/m) 4m Pergolini 8mm JFC MeanSize: (47,6 mm) Density: (1252/m) 4m Pergolini 8mm JFC MeanSize: (47,6 mm) Density: (725/m) 1m Pergolini 8mm JFC MeanSize: (43,5 mm) Density: (725/m) 1m Pergolini 8mm JFC MeanSize: (43,5 mm) -Commercial density VARIABLE, decreasing westward -Commercial density on JFC is HIGH >700/m -LOSS of larger mussels typical at many sites (floats) -Densities CONSISTENT from east to west and depth Facebook: ’Mussel talk’ Shellfish Solutions AS

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 4,5 4,0 3,5 Avg cooked meat mass g 3,0 1m 9m 2,5 1m jfc-02-1m jfc-02-9m ROM-01-1m ROM-01-9m 9m 2,0 1,5 1m 1m 9m 9m 1,0 0,5 - >40-45 >55-60 size class (mm) Small : no difference in meat Commercial : JFC meat was 7% heavier at 1m, 4% heavier than ROM at 9m: content with depth or less stress & more time to feed between ROM & JFC lines Facebook: ’Mussel talk’ Shellfish Solutions AS