Hydrolysis Enzyme of Alternative Ingredients for Fish Feed: A Review

Alternative raw materials have high potential as a source of feed protein that can support growth. Alternative raw materials have advantages such as low cost, abundant availability but the use of alternative raw materials in feed formulations is often limited by the presence of anti-nutritional substances and a relatively high crude fiber content of 11-28%, so further processing is needed to improve the quality of feed ingredients from alternative materials. The purpose of this literature review study is to determine the advantages of alternative feed ingredients for fish that have been hydrolyzed by enzymes. Evaluation studies of improving the quality of feed ingredients through enzymatic hydrolysis give varying results. The best enzyme hydrolysis can reduce the crude fiber content in coconut cake by 67.8%. Enzyme hydrolysis in alternative feed ingredients can also affect growth in fish due to increased digestibility in fish. The best growth was obtained in tilapia at 4.34% by hydrolysis of the protease enzyme. Enzyme hydrolysis is proven not to have a negative impact on several types of fish so that enzyme hydrolysis can be applied to improve the quality of alternative feed ingredients in fish feed formulations. However, enzyme hydrolysis has drawbacks, namely it only works specifically and depends on temperature and pH.