Food for thought: Feed management strategies, part 2
Production goals may call for specialized diets to meet market or other demands. An evaluation of feed management strategies can optimize culture conditions and maintain efficiency.
Soy products replace fishmeal, fish oil in gilthead sea bream feed study
A laboratory study indicated gilthead sea bream can be grown on feeds in which fishmeal and fish oil levels are reduced from traditional values using soy products.
Twin-screw extruders outperform simpler single-screw machines
Although their aquafeed manufacturing process features are similar, twin-screw extruders offer more operational flexibility than single-screw extruders.
Food for thought: Feed management strategies, part 1
Based on thorough knowledge of the culture species, feed formulations must deliver protein and energy, and a balance of nutrients in a palatable form consumed with little waste.
Beta-glucans in barley increase immune response, disease resistance in rainbow trout study
In a study, ground barley containing different levels of beta-glucan was substituted for wheat in experimental diets fed to rainbow trout.
Increased ethanol production shifts feed industry grain use
The large-scale shift of corn from animal feed to ethanol production is a potentially disruptive force in the feed ingredient world.
Meta-analysis examines ingredient substitution for fishmeal in salmon, trout feeds
In a meta-analysis of 28 nutrition studies, the authors found limited possibilities for ingredient substitution for fishmeal in diets for salmon and trout.
Astaxanthin: Feed supplement enhances pigmentation, health
Dietary carotenoids maintain optimal pigmentation and health benefits in cultured aquatic animals. Researchers consider astaxanthin an essential nutrient.
Enteromorpha tested as shrimp feed ingredient
With vitamins, minerals, carotenoids and higher protein content than other species, Enteromorpha is a superior seaweed choice and a potential shrimp feed ingredient.
Effective ingredient specifications yield quality feeds
Aquafeed manufacturers can ensure quality by looking beyond price and with written ingredient specifications adhering to nutritional formulations.
Plant proteins effectively replace fishmeal in shrimp feed trial
A commercial-scale shrimp feed trial demonstrated that soybean meal and corn gluten meal are effective protein alternatives to fishmeal in shrimp feeds.
Vacuum process supports high oil content in feed coatings
Evolving vacuum coaters can apply coatings to feed with up to 40 percent oil levels. It may soon be used to reduce inclusion levels of fat- and water-soluble vitamins in feeds.
Hydrolyzed fish: Alternative ingredient for aquafeeds
Hydrolyzed fish byproducts can serve as highly digestible feed ingredients with significant amounts of amino acids and fatty acids.
Understanding oxidation: managing ingredient, food quality
Antioxidants can be effective at controlling lipid oxidation in animal feeds and ingredients and should be added early in processing to limit free radicals.
Microwave drying expanding to aquafeed production
Quick heating can reduce degradation of flavor and nutrient content in aquafeeds. Microwave dryers dry a range of products uniformly.
Palm distillate in catfish diets enhances growth, fillet quality
Palm distillate could be an effective substitute for fish oils in catfish diets. It is is a rich source of vitamin E and natural antioxidants.