biofloc-based vannamei experiences in india what we started, how are we doing & where are we...
TRANSCRIPT
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Biofloc-based Vannamei Experiences in India
What We Started, How Are We Doing & Where Are We Going?
Anil Ghanekar
www.ecosecuresystems.com
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THE BEGINNINGWater Exchange- The Only Technology
• Water-exchange to control water quality
• Traditional tidal fed ponds
• Shrimp aquaculture’s happy beginning
High tide
Low Tide
Pond
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WATER EXCHANGE has PROBLEMS with
Biosecurity, Environment & Profitability
• Entry of water borne infections – WSSV
• Environmental issues- CAA was formed
• Water treatment of both raw water and waste water is
expensive
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How to reduce water exchange?
• ALGAE = Sunlight + Nitrogen
Reduced water exchange
• R.A.S. = Autotrophic Bacteria + Nitrogen
Exchange through filters
• Biofloc = Heterotrophic Bacteria + N + Carbon
Zero exchange
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Comparative Setup Costs Between Autotrophic & Heterotrophic Systems
Bio-filtrationHigh Cost
Biofloc Low Cost
2004 onwards 2007 onwards
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Comparative FCRs of RAS And Biofloc Nursery Systems
Results with RAS nursery system (2004-2005)
Results with Biofloc Nursery systems (2007)
Species Density/m3 Animal wt in mg. FCR range
P. monodon 10,000 15 to 250 1.7 to 2.4
F. indicus 18,000 15 to 250 1.4 to 1.8
TANK A B C
Species F. indicus F. indicus P. monodon
density/m3 18000 12000 11000
% Survival 83% 73% 91%
FCR 0.68 0.89 1.25
Harvest weight (mg)/shrimp
0.225mg 0.225mg 0.125mg
(Published in GAA May 2009)
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Why Biofloc?
• Low Or Zero Exchange
• Better Biosecurity
• Lower FCR
• Better Immunity
• Higher Density
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Biofloc Nursery
• 100 m3 circular tanks
• Farm starter feed
• No venturi or air lifts
• Only aerotube based aeration of 1 Hp/tank
• Max stocking density of 10,000/m3
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Results With L. Vannamei Juveniles Reared In Low Salinity Biofloc Nurseries & Farms (2012-13)
Batch A B C
Days in Nursery 21 25 24
Juvenile weight 240 mg 320 mg 350 mg
Days in Farm 66 63 60
Average weight at Harvest
22 g 18 g 20 g
Max 10,000 juveniles/m3 6 hours 95%+ survival Compensatory growth
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DOC 1 DOC 30 DOC 60 DOC 900
5
10
15
20
25
30 Day old Biofloc Nursery Juveniles
Direct stocking with PL 10
Day Of Culture (DOC) at the Farm
A B
W in
Gra
ms
30 Days
Biofloc Nursery Reared Juveniles Show Compensatory Growth In The Farm
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Biofloc Growout Trials
• 1000 m2 Lined Ponds
• Central Drain
• Aerotube Aeration
• Biomass Of 3kg /m3
• 40 Count In 80 Days
• 0.3gm Stunted Juveniles Stocked
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Biofloc Nursery A Potent Link
• Longer Testing Window
• Better Immunity
• 3 Crops Instead Of 2 Crops A Year
• Larger Animals
• Higher Farm Survival
• Productivity 150%
Hatchery
150% + PL requirement
Biofloc Nursery
3-5 weeksFarm
150% production
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Hitide Farms
• 3 Years
• 5 Crops
• Excellent For Zero Exchange
• Sludge removal is very critical
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Biofloc at Research Institutions
• C.I.B.A.
• Dr. Krishnani from National Institute of
Abiotic Stress Management, Baramati
• Dr. Kurup and students - Kerala University of
Fisheries and Ocean Studies.
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FUTURE
Less Area
Less Water
Less Workers
Less Power
Totally Biosecure
Predictable Production
Weekly/Daily Supply
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Future Solutions
Less Area
Less Water
Less Workers
Less Power
Totally Biosecure
Predictable Production
Weekly/Daily Supply
High Density
Zero Exchange
Automation
Efficient Technology
Zero Exchange
High Survival
More Ponds
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Future Research & Development
• Pure Biofloc Nurseries And Farms
• Low Density Biofloc With Mixed Systems
• Genetics
• Specialized Feeds
• Molecular Biology
• Different Species
• Both Biofloc and Vannamei are here to stay
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Thank You
www.ecosecuresystems.com