Application and value analysis of yeast hydrolysate in aquaculture

      With the development of aquaculture towards high efficiency, health, and green direction, functional feed materials are receiving increasing attention from the industry. Yeast hydrolysate, as a stable and nutrient rich bioactive substance, has been widely used in aquatic feed in recent years and has become one of the important functional additives to improve aquaculture efficiency.

1、 What is yeast hydrolysate

      Yeast hydrolysate is a product obtained by decomposing yeast cell walls and intracellular substances through enzymatic hydrolysis or autolysis processes, using yeast as the raw material. Its main components include small molecule peptides, free amino acids, nucleotides, β - glucans, mannan oligosaccharides, as well as various vitamins and trace active factors, with high bioavailability.

2、 The main role of yeast hydrolysate in aquatic products

Increase feed intake and promote growth
      Yeast hydrolysate has good attractant properties, which can improve the flavor of feed and increase the feeding enthusiasm of aquatic animals such as fish and shrimp. Meanwhile, small molecule peptides and free amino acids are more easily absorbed and utilized, which helps to improve growth rate and feed conversion rate.

Enhance immunity and improve stress resistance
      The β - glucan and nucleotides rich in yeast hydrolysate can activate the non-specific immune system of aquatic animals and enhance their disease resistance. It is helpful to reduce incidence rate and mortality under conditions of high-density breeding, temperature change or transportation stress.

Improve intestinal health and stabilize aquaculture efficiency
      Mannan oligosaccharides can inhibit the colonization of harmful bacteria, promote the growth of beneficial bacteria, and maintain the balance of intestinal microbiota. A healthy intestinal environment not only improves nutrient absorption efficiency, but also helps reduce the occurrence of intestinal diseases.

Partially replacing fish meal to reduce feed costs
      In the context of increasingly scarce fish meal resources, yeast hydrolysate can serve as a source of high-quality protein and functional ingredients. Reasonable addition can replace fish meal to a certain extent, reduce feed formulation costs, and maintain or even improve feed quality.

3、 Applicable objects and application prospects

      Yeast hydrolysates are widely used in fish, shrimp, crab, and special aquaculture, especially in the seedling stage, stress stage, and high disease incidence period, where their effects are more pronounced. With the upgrading of aquaculture models and the emphasis on the concept of "no resistance, reduced resistance", the application prospects of yeast hydrolysate in healthy aquaculture are very broad.

4、 Conclusion

      Overall, yeast hydrolysate has both nutritional value and functional activity, and is an important raw material that cannot be ignored in modern aquatic feed. The scientific and rational application of yeast hydrolysates not only helps to improve aquaculture efficiency, but also conforms to the direction of sustainable development in the aquaculture industry.