Tuesday, January 17, 2012

14 days left to register!


There are just two weeks left to register for Aquafeed Horizons and the FIAAP Conference Asia 2012
An Extrusion Master Class, New non-GMO tailored soybeans for specific feed use, algae, phytobiotics, AA variability in fishmeal ... and much more at these international conferences for feed professionals.
Join your colleagues and friends: Online registration required by January 31. Visit the conference website for full information and to register.
Questions? Contact us.
NOTE: We are now offering special rates for students - see website for details.
Aquafeed Horizons Asia is the Aquafeed.com conference taking place February 15, 2012 at BITEC, Bangkok.
The FIAAP Conference Asia is the feed ingredients and additives conference taking place February 16, 2012, BITEC, Bangkok.
These conferences are organized in association with Victam International and will take place during Victam/FIAAP/GRAPAS Asia 2012 international feed and grain shows - visit the event website for details.

Monday, January 02, 2012

Extrusion workshop: Practical extrusion and diet development for extrusion processing


Peter Hutchinson, Director, E.N. Hutchinson, Auckland, New Zealand

The workshop will comprise two sessions: Practical Extrusion and Diet Development for Extrusion Processing. Practical Extrusion will focus on feed extrusion principals such as screw designs and profiles; die design, extruder trouble shooting, drying and cooling. The session on practical nutrition will look at diet development for extrusion processing and cover such topics as sourcing locally available material, matching extruder profile to formulation, die design in relation to species, high retention (water stable) diets, optimizing the pellet through extruder settings (cook, minimizing nutritional damage, stability and density), basic quality control, post coating and density control through coating and dryer design. Practical problem solving is at the heart of the workshop and Peter will be joined by an international panel of extrusion experts to answer your extrusion questions.

Use of distiller’s dried grains with solubles in tilapia diets


Chhorn Lim, Supervisory Nutrition Scientist, Aquatic Animal Health Research Unit, USDA, ARS, Auburn, USA

Distillers dried grains with solubles (DDGS) are currently readily available and less expensive than other conventional protein sources. However, its nutrient content and nutritional value vary with the source and quality of grain, fermentation and drying processes and the quantity of distiller’s solubles added. Generally, corn and wheat DDGS are deficient in lysine and methionine for tilapia, with lysine being the most limiting. Feeding studies showed that 20 - 30% corn or wheat DDGS can be included in tilapia diets without requiring lysine supplementation. With lysine supplementation, DDGS at levels of 40% or higher can be used without affecting growth and feed efficiency. DDGS also contain yeast, a rich source of beta glucan and nucleotides that have been reported to enhance immunity and disease resistance in fish. Corn DDGS, due to its high oil content that is rich in linoleic acid, is an excellent source of energy and essential fatty acid for tilapia. High concentrations of xanthophylls in corn DDGS may impart yellow pigment in fish flesh if included at high levels. Considering various factors affecting the nutritional value and quality of pellet and fish product, 15 - 20% DDGS appears to be optimum in diets of tilapia.

The missing link for fish meal substitution: low-cost, high-volume, sustainable protein and EPA-rich microalgae (spirulina) biomass


Miguel Cizin, President, Biomat

The debate over sustainability of fish feed ingredients such as fish meal, which is mostly sourced from unsustainable pelagic fish wild catch,  has promoted the development of sustainable vegetable-sourced protein alternatives as a viable substitute.  In addition to other aquatic and non-aquatic ingredients, such as soy, microalgae biomass in general, and spirulina algae in particular, has been identified and acknowledged as the most promising ingredient for high-volume, sustainable protein, due to its unique ability to capture CO2 and available energy and very efficiently convert both into protein and nutrient-rich (EPA) biomass.  There is a long-standing and still very strong global consensus that the single missing link for algae to fulfill its promise as the optimal ingredient to substitute a high percent of fish meal in animal feed is the availability of scalable, competitively priced algae biomass produced in a sustainable process, using a limited amount of non-fertile land, water, nutrients, and energy. A new, patent-pending, sustainable algae biomass production technology is described, which can be deployed on non-fertile land, and which does not require a nearby smokestack as it captures the large amount of carbon molecules required directly from the available CO2 in the surrounding atmosphere.  Typical production volumes per unit surface and overall production costs per ton of algae biomass produced in the first facility deployed in Israel will be presented.

Total replacement of fish meal by poultry by-product meal in shrimp feeds


Victor Suresh1 & Sergio Nates2
1 Integrated Aquaculture International, Brunei Darussalam
2 Fats & Proteins Research Foundation, USA

The presentation will highlight efforts to completely replace fishmeal in shrimp feeds using poultry byproduct meal (PBM). In formulas that are similar to commercial feed formulas and containing 21-24% premium fishmeal, total replacement by PBM results in shrimp performance that is lower by about 15%. We have investigated the attractability and palatability factors in PBM, and found them to be present in significant quantities. Nutritive value of PBM’s fat component for shrimp has also been extensively investigated. The results of the investigations will be discussed in the presentation.