Biotechnology could combine positive traits in seed-based fish feed
Biotechnology offers a potential avenue to overcoming the negative traits of seeds and enhancing feed performance to improve fish health.
Finishing feeds tailor fatty acid composition in tilapia fillets
By feeding different oils at different points in a fish's life cycle, such as finishing feeds, farmers can tailor the composition of fillets to maximize value and minimize fish oil use.
Nutritional compensation supports fishmeal replacement in sea bream feed
In a study with gilthead sea bream, two test diets used primarily soy products as sources of protein and fat against a reference feed based largely on fishmeal and fish oil.
U.S. agencies focus on fishmeal in feed
The National Oceanic and Atmospheric Administration and U.S. Department of Agriculture joined forces through the NOAA-USDA Alternative Feeds Initiative to identify feed ingredients that will reduce the amount of fishmeal and fish oil in aquaculture feeds while maintaining the human health benefits of seafood. Through research on a variety of sources, promising alternatives are beginning to emerge.
Spotted sea trout studies identify nutrition requirements, benefit of exercise
The authors performed nutrition studies to determine a maximized efficiency of yield in spotted sea trout. Fry were “forced” to swim against a steady current to gauge the effectiveness of increased exercise.
Alternatives to fishmeal perform well in low-salinity shrimp farm trial
In a white shrimp farm trial in a low-salinity environment, alternatives to fishmeal did not negatively impact the growth, survival or FCR of the shrimp.
Amino acid requirements in developing marine fish
Most marine fish have pelagic eggs with large pools of free amino acids of fairly constant proportion regardless of species. The amino acids provide energy for metabolism and are an important nutritional asset for growing embryos.
Fatty acid composition of red drum maintained by fishmeal, fish oil
Recent research by the authors evaluated strategies to reduce fishmeal and fish oil in diets for red drum by substituting terrestrial proteins and lipids while maintaining beneficial fatty acids with DHA supplements derived from marine algae.
Fishmeal replacement in diets effective at shrimp farm trials
Shrimp farm trials demonstrated the feasibility of fishmeal replacement with soybean and corn gluten meal with little adverse effect on production performance.
Soy protein concentrate replaces fishmeal in fingerling test diets in China
Results of studies indicate that soy protein concentrate can be substituted for fishmeal in diets for common carp, grass carp, tilapia and channel catfish fingerlings raised in ponds and cages.
Study finds krill meal cost-effective ingredient in shrimp feed
In a study, krill meal incorporated into shrimp diets replaced fishmeal and soy lecithin with no significant effect on shrimp performance.
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.
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.
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.