This invention relates to the field of
aquaculture technology, and in particular to an immune
enhancer for
juvenile large yellow croaker (Culter alburnus), its preparation method, and its application. The immune
enhancer provided by this invention, through the compounding of specific components in a specific ratio, achieves the synergistic effect of polypeptides, immunopolysaccharides, antioxidants, and nutritional factors, while also considering rapid absorption,
immune regulation, and high-temperature
environmental stability. It is suitable for the immune enhancement needs of large yellow croaker juveniles under high-temperature
seawater conditions of 29-31 °C, and can enhance the non-specific and
specific immunity of juveniles under high-temperature
seawater conditions, improving
disease resistance and
survival rate.