| Marine protein hydrolysate for aquafeed |
| Paper ID : 1064-ICIAQUA |
| Authors |
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Mehdi Nikoo * Department of Pathobiology and Quality Control, Artemia and Aquaculture Research Institute, Urmia University, Urmia 57179-44514, Iran |
| Abstract |
| Purpose: Fish protein hydrolysates are used as a source of peptides and amino acids with high digestibility, fast absorption, and important biological activities. The structure of peptides in protein hydrolysates from fishing and aquaculture by-products are highly variable with most types of by-products as the initial protein source and the various operating parameters that affect the hydrolysis might influence their efficacy for aquaculture nutrition. The purpose of this study was to investigate the application of protein hydrolysates for aquafeed. Method: Databases such as PubMed, Scopus, Web of Science, and Google Scholar were used in this study. Keywords used were fish processing by-products (BPs), marine discards, protein hydrolysate, bioactive peptides (BAPs), enzymatic hydrolysis, autolysis, antioxidant activity, functional feed ingredient, juveniles, growth performance, and feed additive. Results: The potential of marine by-products hydrolysates/peptides as functional feed ingredients has been confirmed. Small peptides and free AA in aquafeeds, especially at MW <1 kDa, have a beneficially impact on growth, nutrition, and health. The presence of feeding stimulants (i.e., Glu, AMP, Ala, Arg, betaine, taurine, and Gly) in marine protein hydrolysates can trigger appetite and increase feed intake in species that rely on chemoreception for their feed intake. Small peptides and free amino acids in aquafeed were documented to improve antioxidant and immune system, resulting in higher resistance to environmental stress and disease. Conclusions: Dietary inclusion of peptides in marine or freshwater species allowed replacing fish meal, boosted growth and survival rate, while enhancing feeding behavior during environmental challenges. Addition level of 4-5% in starter diet is recommended for carnivorous fish. |
| Keywords |
| Seafood by-products, Hydrolysis technology, Protein hydrolysates, Low-molecular-weight peptides, Feed applications |
| Status: Abstract Accepted (Oral Presentation) |