Ietalurus punetaus artificial hatching method

Abstract

The invention belongs to a fish artificial incubation method field relating to the artificial incubation method of ictalurus punctatus. After the parent fishes are in natural spawning fertilization in a spawning pond, the egg masses collected are disposed in an incubating plant for hatching, which is characterized in that the hatching water salinity is 0.1 to 8%, the alkalinity and hardness are larger than 20mg / L calcium carbonate, the hydrogen sulfide is smaller than 0.005mg / L, the iron is smaller than 0.2mg / L, the ammonia is smaller than 0.5 mg / L and the dissolved oxygen is larger than 5mg / L. The water temperature should be maintained from 24 degree to 30 degree. The membrane rupture prophase of this incubation method is implemented inside a cement pool or a circuit in which the conditions such as water temperature are relatively stable. After the melanose of eyes are emerged or the egg masses are turned into red, the fries are moved to a hatching tray for the rupture of membrane. Therefore, the fry activities are easy to observe, and the fry collecting can also be facilitated.

Description

technical field [0001] The invention belongs to the field of fish artificial hatching methods; in particular, it belongs to the artificial hatching method of channel catfish. Background technique [0002] During the current artificial breeding of channel catfish, the following devices and methods are adopted to help lay eggs and hatch them: [0003] (1) Ovary production and its use: common ovary production includes iron barrels, wooden barrels, wooden boxes, plastic barrels, earthen pots, and earthen vats. Generally, channel catfish broodstock like to have spawning buckets of a certain shape, if not, irregular ones are also acceptable. The size of the ovary should be able to freely enter and exit the male and female broodstock, and it is advisable to accommodate a pair of broodstock for normal spawning activities. The bottom of the ovary should be netted with a net. If it is a tile tank, it is best to drill a few holes at the bottom of the tank for easy operation (water ca...

AI Technical Summary

Problems solved by technology

However, conditions such as water temperature are greatly affected by external influences, which have a greater impact on the early stage of embryo development, which may lead to problems such as high deformity rate and low hatching rate.