Feed additive for improving fertility of parent fish of tilapia

Abstract

A feed additive for improving the fertility of parent fish of tilapia comprises the following components by weight percent: fish meal 10-20, ragworm meal 1-5, soybean protein isolates 30-40, phospholipids 10-20, fish oil 5-10, vitamin C-2-polyphosphate ester 5-10, vitamin E 10-15, vitamin A 1-5, zinc-amino acid chelate 1-3 and manganese-amino acid chelate 0.5-1. The feed additive obviously improves the body condition of the parent fish of the tilapia, enhances the fertility of the parent fish of the tilapia and increases the egg laying amount of the parent fish, the egg fertilization rate, the hatchability and the survival rate of larvae and juvenile; the feed additive is used in the feed of the parent fish of the tilapia, with additive dosage of only 1-3%, 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 feed additive for improving the fecundity of tilapia broodstock. 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 brooding fish. When the water temperature reaches above 22°C, sexually mature female and male fis...

AI Technical Summary

Problems solved by technology

[0004] Natural hatching has the following disadvantages: long hatching time, long broodstock breeding cycle; low fry hatching rate, low survival rate, and poor uniformity

The consequence is that the increase in the number of spawning results in most of the nutrients in the broodstock being transformed into sex cell development, which causes the body condition of the broodstock to decline, the fecundity to weaken, the amount of eggs laid to decrease, the quality of the eggs laid is not high, the fertilization rate, hatching rate, offspring The survival rate of juveniles decreased to varying degrees

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