ALGAL AND MICROBIAL ALTERNATIVES FOR SUSTAINABLE AQUAFEEDS

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ALGAL AND MICROBIALALTERNATIVES FOR SUSTAINABLE
AQUAFEEDS

• Robert A. Bullis, D.V.M.
• Advanced BioNutrition Corp.
• 7155 Columbia Gateway Dr.
• Columbia, MD 21046

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THE CHALLENGE

• Fishmeal and fish oil cannot be relied upon as
  the main sources of protein and lipid in
  aquafeeds.
• Alternatives must be developed that are
  environmentally sustainable, that maintain
  critical levels of essential Omega-3 fatty acids,
  and that are economical.

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FISHMEAL AND FISH OIL REPLACEMENTCONSTRAINTS

• Long-chain PUFA are an essential requirement
• Short chain PUFA are not a complete substitute
• Protein alternatives have poorer digestibility
• Cost Considerations

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FISHMEAL AND FISH OIL REPLACEMENT ALTERNATIVES

• Terrestrial vegetable protein (TVP)
• Soy meal, wheat, corn gluten etc.
• Terrestrial animal protein (TAP)
• PBM, MBM, feather meal
• Single cell proteins (SCP)
• Bacteria, yeasts, algae
• Single cell oils and meals (SCO)
• Algae, filamentous fungi

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State of alternative-diet research in shrimp
2003
All of the fishmeal in shrimp diets had been
replaced but fish oil was added to insure
profitable growth
All of the fish oil in shrimp diets had been
replaced but fishmeal was added to insure
profitable growth
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Proximate Analysis of Fish meal
68 Protein (high digestibility) 7 Lipid (0.5
to 6.0 DHA) 2 Carbohydrate 22 Ash (Ca and P)
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The Main Source of DHA is Marine Organisms
Sun
Fish oil
Harvesters
LNA
DHA
EPA
Fish meal
Primary Producers Marine Algae
Secondary Sources
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The Solution Algal DHA
Hypothesis Irreplaceable part of fishmeal is
DHA Fact Other than fish, algae are the only
source of DHA
Algal DHA
Key Benefits

• Sustainable
• Traceable
• Toxin-free
• Consistent product quality
• Predictable pricing

Clean and Green
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ALTERNATIVE DIET RESEARCH 2003-2007
Preliminary laboratory trials to confirm
replacement assumptions
Commercial-scale pond trials that demonstrate
the profitability of alternative diets
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2005 Commercial Pond Trials Organic
Plant-based diets
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2005 Commercial Pond Trials

• Ponds were stocked at 25/M2
• Survival to harvest was not significantly
  different
• The feed conversion ratio (FCR) was not
  significantly different
• No significant difference in harvested biomass
• Shrimp at harvest were significantly different in
  size with shrimp in ponds fed the Eco friendly
  diet being significantly larger at harvest

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2006 Commercial Pond Trials Plant and
Animal-based diets
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2006 Commercial Pond Trials

• Ponds were stocked at 100/M2
• Survival to harvest was not significantly
  different
• The feed conversion ratio (FCR) was not
  significantly different
• No significant difference in harvested biomass
• Shrimp at harvest were significantly different in
  size with shrimp in ponds fed the Eco friendly
  diet being significantly larger at harvest

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Can algal meal technology be relied upon to
furnish large-scale replacement options in
aquaculture feeds?
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Scale up of Algal DHA Production
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ALGAL MEAL ADVANTAGE

• Essential long-chain Omega 3 fatty acids are
  provided
• Sustainable and contaminant-free technology
• Commodity price stability