20 - By-products from seafood processing for aquaculture and animal feeds

Abstract

Publisher Summary Fish processing by-products refer to the tissues that remain after much of the fish muscle has been removed and include heads, frames, viscera, and skin, among others. Edible parts such as heads, milt, and stomachs are on occasion collected and sold and some fish skin is made into gelatin or fish leather. By-products can be used to make fertilizer and other products; however, most of the fish by- products produced in large shore-side fish processing operations are used to make fish meal and fish oil. Primary uses of fish meals and oils are as aquaculture feed ingredients for fish and shrimp, and as livestock and poultry feed ingredients. This chapter discusses the making of aquaculture and animal feed ingredients from fish processing by-products and focuses on the by-products currently produced from marine finfish. Ocean fish is used for human consumption as well as the production of feed ingredients for aquaculture and livestock. If aquaculture growth continues and supplies of fish meal and oil remain constant, fish meal and fish oil in aquaculture feeds will shift from being primary sources of protein and energy to being specialty product. Fish meal is a good aquaculture feed ingredient because it is a high quality protein and compliments most vegetable proteins in feed formulations. Fish meals usually have a high content of long chain omega-3 fatty acids and minerals, and have good palatability characteristics.