Test-tube Tilapia nilotica breeding method

Abstract

The invention discloses a test-tube Tilapia nilotica breeding method relating to an aquatic product fry technique and comprising the following steps of: respectively injecting oxytocic into milter and the raun of Tilapia nilotica and then making the milter lay sperms; collecting and then diluting the sperms with 0.8 percent normal saline preserving fluid into 4-5 times and then mixing the sperms with ova laid from the raun and stirring for 3-5 min to fertilize the ova, and then hatching fertilized ova into fries. The test-tube Tilapia nilotica breeding method can greatly improve the breeding efficiency and the hatching rate of the Tilapia nilotica and the survival rate of the fries, and provides the technical and method support for developing the gynogenesis, the polyploid breeding and the family establishment and breeding of the Tilapia nilotica.

Description

technical field [0001] The invention relates to aquatic fry technology, in particular to a method for artificially propagating Nile tilapia. Background technique [0002] Nile tilapia is a tropical fish with wide adaptability, miscellaneous food habits, strong disease resistance, high feed utilization rate, fast growth and tender meat, so it is welcomed by farmers. [0003] At present, the breeding method of Nile tilapia is: put the sexually mature female and male broodstock in the same breeding pond with a water temperature above 18°C, and when the water temperature rises to 22°C or above, the female fish will ovulate and the male fish will ovulate on their own. The fish ejaculate, and the sperm and eggs are combined for fertilization to reproduce naturally. The disadvantages of this natural breeding method are: first, the requirements for the breeding pond are high, and it needs to be cleaned and disinfected before the broodstock is put in a suitable place to kill wild fi...

AI Technical Summary

Problems solved by technology

The disadvantages of this natural breeding method are: first, the requirements for the breeding pond are high, and it needs to be cleaned and disinfected before the broodstock is put in a suitable place to kill wild fish, harmful organisms and pathogens in the fish pond. Apply basal fertilizer; the second is that the number of fertilized eggs is small, the reproductive efficiency is low, the hatching rate and the survival rate of fry are very low; the third is unfavorable for large-scale batch production, and it is difficult to control artificially; the fourth is that it is difficult to obtain unfertilized eggs and early fertilized eggs , some breeding methods are difficult to apply in the breeding of Nile tilapia

The disadvantage of this method of reproduction is that the timing of ejaculation of tilapia males and the timing of ovulation of tilapia females are not necessarily synchronized

Therefore, the number of fertilized eggs is small and the reproductive efficiency is not high