Preparation method and device for desalted larvae of small yellow croakers

Abstract

The invention discloses a preparation method and device for desalted larvae of small yellow croakers, and the method comprises the following steps: 1, selection of a culture pond: selecting the culture pond according to the water amount and the quantity of the larvae of the small yellow croakers, and adding natural seawater and the larvae of the small yellow croakers into the culture pond; 2, fry desalination: dividing the fry into ponds, controlling the seawater salinity in the culture ponds, and carrying out desalination culture on the larimichthys crocea fry; and 3, transfer breeding, wherein after the fry desalination work in the step 2 is completed, the desalted larimichthys crocea fries are transferred to a salt and fresh water area to be bred; and the culture pond is a cement pond, a water salinity adjusting device is arranged above the cement pond, and a salinity monitoring device is arranged on one side of the cement pond. According to the method, the whole pond is fully covered with water, local salinity sudden change of water in the culture pond is greatly reduced, fry stress reaction caused by salinity change is reduced to the maximum extent, preparation of desalted fry of the small yellow croakers is achieved, and therefore the yield of small yellow croaker culture is increased.

Description

technical field [0001] The invention relates to the technical field of fry desalination preparation, in particular to a method and device for preparing desalinated fry of small yellow croaker. Background technique [0002] The small yellow croaker belongs to the genus Xanthoidae and the genus Yellow croaker. It is a warm-temperate bottom-migration fish. Together with the large yellow croaker, hairtail, and squid, it is also known as the four major marine products in my country, and has very important economic value. Due to long-term fishing pressure and changes in the marine environment, the resource structure of the wild population of small yellow croaker has been severely damaged in recent years, showing germplasm decline such as individual miniaturization and early sexual maturity. With the breakthrough of small yellow croaker artificial reproduction technology, artificially farmed small yellow croaker will replace consumers' consumption demand for wild caught small yello...

AI Technical Summary

Problems solved by technology

In order to facilitate the promotion of small yellow croaker seedlings to brackish water areas, the desalination cultivation of seedlings before stocking is particularly important. At present, the desalination of many aquatic animal seedlings is to add fresh water directly through ordinary water inlet pipes, resulting in local changes in the salinity of seawater in the pool. It is very large, which leads to a strong stress response in the seedlings and causes a large number of seedlings to die. Therefore, a method and device for preparing desalinated seedlings with a high survival rate are urgently needed

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