![]() ![]() ![]() In Norway, where seaweed meal has been produced for animal feeds since the 1960s, seaweed meal is considered to have 30 percent of the nutritive value of grains. Because much of the protein and carbohydrates in seaweed are not digestible in non-ruminants, the nutritional value of seaweed for poultry is as a source of minerals and vitamins. To produce seaweed meal for use in animal feed, brown seaweeds are collected, dried, and milled. Other products developed from seaweed include fertilizers, skin care products, and animal feed. Recently researchers have been looking at the potential of using seaweed in medicine. The most common use for seaweed is as human food. Seaweed farming is common in many coastal areas around the world. Most red algae grown are used in food products, especially in the Orient. Red algae make up the largest group of seaweeds (5,000 to 6,000 species) and are found throughout the world. Red algae store their energy mainly as starch. The red color is the result of the pigments phycoerythrin and phycocyanin, which mask the other pigments. Red algae include species in the Palmaria, Delesseria, Chondrus, and Corallina genera. ![]() Kelps ( Laminaria ) are the main seaweeds grown in the northeastern United States. About 1,500 to 2,000 species of brown algae exist. Brown algae store their energy as complex carbohydrates, sugars, and higher alcohols. The brown color is due to the dominance of the xanthophyll pigment fucoxanthin, which masks the other pigments (chlorophyll, beta-carotene, and other xanthophylls). Brown algae include species of the Laminaria, Saccharina, and Fucus genera and Sargassum muticum.Common green algae, such as sea lettuce ( Ulva) and green sting lettuce ( Enteromorpha ), are used as food. Green algae require sufficient sunlight to survive, so they usually grow in shallow waters. Green algae store their energy mostly as starch but also as some fats or oils. The green color comes from chlorophyll, beta-carotene, and various xanthophylls. Green algae include species of the Chlorella, Chlamydomonas, Enteromorpha, Spirogyra, and Ulva genera.Typically, they are classified as green, brown, or red. Seaweeds, which can be used in poultry diets, are marine algae, or vegetation of the sea. ![]()
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