Compound immunoenhancer for larvae and juvenile of tilapia

Abstract

A compound immunoenhancer for larvae and juvenile of tilapia comprises the following components by weight percent: beta-glucan 20-30, ginsenoside 5-10, seaweed polysaccharides 10-20, phospholipids 5-10, vitamin C-2-polyphosphate ester 20-30, vitamin E 10-15, digestive enzyme 5-10 and citric acid 5-10. The compound immunoenhancer obviously strengthens the immunity of the larvae and juvenile of the tilapia and increases the survival rate, the activities and growth speed of the larvae and juvenile of the tilapia; the compound immunoenhancer is used as a feed additive in the feed of the larvae and juvenile of the tilapia, with additive dosage of only 0.2-0.3%, which has no adverse effect on the feed palatability. The used raw materials enjoy stable sources, low price and simple production technology.

Description

technical field [0001] The invention relates to a composite immune enhancer for tilapia larvae and juveniles. Background technique [0002] Tilapia belongs to the genus Tilapia of the family Cichlidae of the order Perciformes. It is a tropical fish with more than 100 species, most of which are produced in Africa. Tilapia has the characteristics of fast growth, wide feeding habits, strong fecundity, few diseases, good meat quality and high yield. At present, the main breeds are: Oni tilapia, Jifu tilapia, Gio tilapia and more than 10 varieties. Oni tilapia is the hybrid offspring of Oria tilapia and Nile tilapia, and is currently the main species of tilapia cultured in China. There is a vast area suitable for tilapia farming in the southern coastal areas of my country, and tilapia farming has huge development potential and favorable conditions. [0003] Tilapia is an oral hatching fish, and natural hatching has the following disadvantages: long hatching time, growth of bro...

AI Technical Summary

Problems solved by technology

[0003]Tilapia is an oral brooding fish, and natural hatching has the following disadvantages: long hatching time, hindered growth of broodstock, decreased fecundity; low, poor uniformity

Artificial hatching will inevitably involve the cultivation of fry. In the cultivation, only relying on feeding biological bait cannot guarantee the growth and development of larvae. It is necessary to have a full-price compound feed that meets the growth and development characteristics of larvae, but there is no such thing on the market. Complete compound feed for larvae of oni tilapia

Moreover, due to the imperfect development of the system of larvae and juveniles, their absorption and utilization of feed is relatively low, resulting in poor stress resistance and low immunity of tilapia larvae and juveniles.

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