Cottonseed Meal
Cottonseed meal is an important source of protein in the United States and is available in many other parts of the world for animal feeds. Initially, formulated fish feeds in the United States contained significant amounts of cottonseed meal; however, after fish meal and other animal proteins decreased in content in commercial fish feeds, cottonssed meal was eliminated form many fish feed formulas because of its low available lysine content. Supplementing cottonseed meal with crystalline amino acids could possibly make it more competitive for use in fish feeds, Because research has shown that the protein quality of peanut meal can be improved for channel catfish by supplementation with synthetic lysine.