A kind of method that utilizes artificial insemination and incubating tank to carry out the breeding method of snakehead family fish

Abstract

The invention belongs to the technical field of fish reproduction, and discloses a method for breeding Channaidae fish by using artificial insemination and hatching tanks. Selected broodstock are temporarily raised in a cement pond with a water temperature of 25-26°C, and induced labor is carried out; In a cement tank with a water temperature of 28-29°C, after the effect time is reached, check the egg squeeze every 2 hours, and perform a total of 3 times; after the egg squeeze, the broodstock is kept temporarily, and penicillin is used to prevent inflammation, and the female broodstock survives more than 75% ; The male fish takes the testis, and grinds it with a metal mesh in the sperm preservation solution; before fertilization, the sperm in the sperm preservation solution is activated with water, and then poured into the eggs for fertilization. The eggs are fertilized and left to stand for more than 2 hours, then hatched in the hatching bucket, and the hatching bucket is inflated; the fertilized eggs are hatched in the bucket for 2 days to produce membranes, and after another 1-2 days, the yolk sac is completely absorbed, and the seedlings are cultivated. The invention significantly improves the utilization rate of male broodstock and the postpartum survival rate of female broodstock, reduces site occupation and improves the success rate of seed hatching.

Description

technical field [0001] The invention belongs to the technical field of fish reproduction, and in particular relates to a method for breeding snakehead fish by using artificial insemination and hatching barrels. Background technique [0002] At present, snakehead is a high-quality freshwater economic fish, which has the characteristics of less bone spurs, fresh and tender meat, and rich nutrition. [0003] The seed propagation of Channa is mainly through the natural spawning method of 1:1 pairing after induced spawning. It is necessary to use a foam box or cement to produce ovaries. Because the male fish of the snakehead will chase and bite the female fish and slap the female fish with its tail during the natural spawning process, which will prompt the female fish to go into estrus and spawn. Many postpartum female fish will be scarred and the postpartum survival rate is not high. This is also the reason why most broodstock can only be used for one year. Moreover, natural s...

AI Technical Summary

Problems solved by technology

When paired eggs are harvested, the postnatal survival rate of the female broodstock is less than 10%, and there is no value for continued breeding, so the broodstock can only be used for one year

[0005] (2) The existing mating spawning and hydrostatic hatching technologies cannot reduce the occupied area of ​​the breeding farm or increase the production scale in the same field

[0006] (3) The existing hydrostatic hatching technology cannot avoid the damage of saprolegniasis to normal developing eggs by dead eggs

Through experiments, the present invention finds that the fertilized eggs of snakeheads can be hatched in the hatching bucket after standing for a period of time, but the low hatching rate in the previous test is mainly because they are put into the hatching bucket immediately after fertilization, and the development stops after the eggs roll over.

Images