Astaxanthin: Feed supplement enhances pigmentation, health
Dietary carotenoids maintain optimal pigmentation and health benefits in cultured aquatic animals. Researchers consider astaxanthin an essential nutrient.
In a meta-analysis of 28 nutrition studies, the authors found limited possibilities for ingredient substitution for fishmeal in diets for salmon and trout.
Dietary carotenoids maintain optimal pigmentation and health benefits in cultured aquatic animals. Researchers consider astaxanthin an essential nutrient.
With vitamins, minerals, carotenoids and higher protein content than other species, Enteromorpha is a superior seaweed choice and a potential shrimp feed ingredient.
Aquafeed manufacturers can ensure quality by looking beyond price and with written ingredient specifications adhering to nutritional formulations.
A commercial-scale shrimp feed trial demonstrated that soybean meal and corn gluten meal are effective protein alternatives to fishmeal in shrimp feeds.
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 byproducts can serve as highly digestible feed ingredients with significant amounts of amino acids and fatty acids.
Antioxidants can be effective at controlling lipid oxidation in animal feeds and ingredients and should be added early in processing to limit free radicals.
Quick heating can reduce degradation of flavor and nutrient content in aquafeeds. Microwave dryers dry a range of products uniformly.
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.
Analytical procedures, like measuring water stability of shrimp feed, performed at labs provide more consistent and quantitative results.
While feed conversion ratios are often used as indexes of feed efficiency, they can be misleading as ecological indicators.
In a feeding trial, organic suspended solids loads for tray-fed shrimp were much lower than those generated by mechanical dispersion.
In grinding aquaculture feed to proper particle sizes, parameters of consideration include particle size distribution and pellet density.
Underfeeding can slow growth rates and overfeeding adversely affects water quality so it is critical to adjust feeding rates to meet actual demands of shrimp.
The optimum dietary lipid level for tilapia ranges from 10 to 15 percent. Various vegetable oil products show promise as replacements for fish oil in feeds.