This invention relates to the field of
aquaculture technology, and in particular to a biological attractant based on
Schizochytrium fermentation broth and its preparation method; the biological attractant based on
Schizochytrium fermentation broth is obtained by
processing the
fermentation broth after oil extraction from
Schizochytrium; the
fermentation broth after oil extraction from Schizochytrium is the residual
fermentation broth after supercritical CO2 oil extraction or
enzymatic hydrolysis oil extraction from Schizochytrium; the preparation method includes: pretreatment of
fermentation broth, sterilization and stabilization treatment, concentration and regulation, and filling and storage; the three core components in the fermentation broth work synergistically,
umami amino acids quickly trigger the taste
perception of aquatic animals,
algal polysaccharides slowly release
odor molecules to prolong the feeding attraction time, and DHA enhances natural
tropism, significantly improving the feeding induction rate of
Litopenaeus vannamei, and maintaining a stable feeding attraction effect even in rainy and low-temperature environments; relying on the natural
viscosity and structural characteristics of
algal polysaccharides, there is no need to add stabilizers such as
xanthan gum.