Gamma irradiation enhances nutritional value of animal byproducts
Gamma irradiation treatment presents a possible processing technique for reducing anti-nutrients and improving the nutritive quality of many feed ingredients.
New IFFO position: Fish as food or feed
Although its overall production is rising, aquaculture is using less fishmeal and fish oil in feed formulations, and increasing amounts of this fishmeal and oil come from byproducts of fish processing.
Polychaete worms reduce waste, provide food in aquaculture
Adaptable and diverse, polychaetes can adapt their feeding behaviors to environmental conditions. Nereis diversicolor, a marine polychaete that can tolerate wide temperature and salinity ranges, is a good candidate for RAS enhancement.
Hidden value of feed: Water quality
The intrinsic values of better feeds directly affect shrimp growth and performance in a positive way, but because better feeds produce less waste materials in culture systems, they also result in improved water quality that indirectly improves shrimp performance.
Strategies for reducing feed costs in small-scale aquaculture
Facing rising aquafeed costs, researchers and farmers are investigating ways to lessen resources spent on feeds by feeding less and feeding differently at small-scale aquaculture operations.
Economic analysis of feeds for super-intensive white shrimp grow-out
The results of recent feed trial research showed potential profitability for the combination of good shrimp production from a biofloc-dominated super-intensive grow-out raceway system achieved with effective diets.
Pea products offer good nutrition, functional attributes in aquafeeds
Facing shifting pricing and availability for traditional aquafeed ingredients, formulators are increasingly moving toward alternative starch and protein from plant sources like pea products.
Fishmeal-free feeds for hybrid tilapia
A series of experiments showed that fishmeal is not an essential ingredient in hybrid tilapia feeds and that plant protein-based diets can yield results similar to those obtained with diets containing 10 percent fishmeal.
Kudzu component: Stress reliever for fish?
A study was performed to determine the effects of puerarin, a biologically active ingredient in the roots of kudzu, on stress modulation in farmed salmon.
Saturated fatty acids limit effects of fish oil replacement in cobia diets
In a study of juvenile cobia diets, results suggested that lipid sources with high levels of saturated fatty acids and low polyunsaturated fatty acids can replace a large percentage of fish oil in feeds if they are amended with DHA.
Feeding considerations for hyper-intensive shrimp nursery systems
For an intensive shrimp nursery, the main goal in feeding is to supply each animal the proper quantity of feed where it can be easily accessed and consumed.
Animal byproduct concentrates useful tools in formulation
With the market volatility of fishmeal, as well as rising sustainability concerns, the aquaculture industry is seeking sources of protein, such as animal byproduct concentrates, to substitute for fishmeal.
Extrusion supports fortification of specialized shrimp feeds based on vegetable proteins
Extrusion manufacturing of aquafeeds has recently seen advances in several areas. The development of new die technology has multiplied hourly output.
Algae alternative: Chlorella studied as protein source in tilapia feeds
Chlorella and other species have potential as protein sources in aquafeeds. In trials with tilapia fry raised in a recirculating system, the fish received a fishmeal-based control diet or feeds with portions of the fishmeal replaced by Chlorella.
Salmon testes meal potential ingredient for Pacific threadfin diets
A study evaluated the potential of pink salmon testes meal, a fisheries byproduct, as a feed ingredient to replace fishmeal in diets fed to juvenile Pacific threadfin. Results showed the salmon testes meal contained high levels of protein, taurine and arginine.
Alternative feed ingredients support continued aquaculture expansion
Identifying sources for essential macro- and micronutrients is important, as well as understanding how best to manufacture feed to required physical specifications when using these new raw materials.