How to get low cost protein for fish feed making ?

Fish feed play an important role in the aquaculture production.A balanced fish diet rich in proteins will lead to a greater development and growth of these aqua animals.
In Europe, the production of fish feed is mainly targeted at highly predatory species such as the salmonids, cod, bass and bream. These carnivorous species require a high protein feed. In line with this, the feed receipts have traditionally contained fish meal and fish oil as the major ingredients. Carbohydrates can only be used in limited amounts for energy. Carbohydrates do, however, often also function as binder for the feed pellets. Small quantities of vitamin and mineral mixtures and other additives are used as well. These additives are important in a monitoring context as they are often regulated in terms of maxi