Method for breeding eleutheronema tetradactylum fry

Abstract

The invention discloses a method for breeding eleutheronema tetradactylum fry. The method includes the specific steps that after parental fishes are bred in an intensifying mode, ripe parental fishesare selected to be put into a circular spawning pond to be bred; fertilized eggs are collected every day and put into a hatching barrel to be hatched till membranes are broken; after the eggs are collected, the spawning pond is cleaned, and seawater is injected into the spawning pond, wherein the eggs of the same batch of parental fishes are continuously spawned and collected for 5 months or above; an earth pond is disinfected through quicklime, and basic food organisms are prepared through fermented organic fertilizers, EM compound bacteria and eel powder; when rich food organisms exist in the water body, larva fishes two days after membrane breaking are put into the earth pond, and are bred till the fry are 2-3 cm in size. According to the method, the circular spawning pond is adopted, circulation flow is used for impacting, the parental fishes perform circumferential motion along the pond walls, and spermiation and ovulation of the parental fishes are facilitated; the parental fishes can chronically and naturally spawn without hormone injection; as the fry are bred in the earth pond, mass production of the fry is more facilitated, limiting of indoor facility building is broken,and industrialization development is more facilitated.

Description

technical field [0001] The invention belongs to the field of aquaculture, and in particular relates to a method for cultivating four-fingered horsefin fish fry. Background technique [0002] Four-fingered horsefin (Eleutheronematetradactylum), also known as Mayou, commonly known as Zhangtiao, Wuyu, beef shoots, and Jiyu. It belongs to the order Perciformes, Polynemidae, and Eleutheronema. It is a famous aquaculture high-economic fish, mainly distributed in coastal waters with loose shallow mud bottom. It is a social fish, often migrating in groups, and sometimes swims into estuaries or mangroves for food. Sometimes enters rivers in winter. Adults prey on shrimp and fish, juveniles prey on juvenile shrimp and mysis. [0003] Four-finger horsefin is very popular among the people. It is a kind of good edible fish. The meat is tender and delicious, and has considerable economic value. It is very delicious when fried. The number of natural four-fingered horsefin is small, an...

AI Technical Summary

Problems solved by technology

In recent years, artificial seedlings have been carried out in the mainland. Chinese patent CN103478047A discloses a method for artificial seedlings of four-fingered horsefin, which requires artificial ripening of broodstock to spawn naturally, and directly hatches them in a nursery pond; after 5 days, water change and sewage suction are required. , the workload is heavy, and the water quality management of the indoor nursery pond is difficult, and the water quality is easy to deteriorate, resulting in the occurrence of diseases and low survival rate

In addition, when the fish fry cultivated indoors are put into the outer pond for breeding, they have to go through the early adaptation period, and the survival rate is low; after 15 days, the fish fry are separated into ponds, which may easily cause injury, infection of bacteria, and occurrence of diseases.

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