Early-stage cultivation method for marine fish fries

Abstract

The invention discloses an early-stage cultivation method for marine fish fries, and belongs to the technical field of artificial breeding of marine fishes. According to the early-stage cultivation method, in the process from fertilized eggs to newly hatched fries, the anti-stress capability of the newly hatched fries can swim flatly, and in the active predation process of the newly hatched fries, a three-stage cultivation technology of arranging canvas bags in an incubation barrel and a pond and the pond is adopted, namely incubation is carried out through the fertilized egg incubation barrel, in the hatching process, an egg membrane removal technology is adopted to ensure that water quality meets hatching requirements, after hatching, pulse type microcirculation water culture is adopted in a canvas bag of the pond, and after the hatching is opened, the fries are put into the pond to be continuously cultured into commodity fries. According to the early-stage cultivation method for the marine fish fries, the hatching rate of the fertilized eggs and the early survival rate of the fish fries can be remarkably increased, the survival rate from the fertilized eggs to the initial fish fries in a traditional early breeding method is increased to 90% from 60%, and the method plays an extremely important role in promoting artificial breeding of marine fishes to achieve high and stable yield.

Description

technical field [0001] The invention relates to the technical field of artificial breeding of seawater fish, in particular to an early cultivation method of seawater fish seedlings. Background technique [0002] The survival rate of fish seedlings is mainly affected by the comprehensive influence of factors such as fertilization rate, hatching rate, larvae survival rate, fish fingerling survival rate, and grow-out survival rate. The total survival rate of marine fish fertilized eggs to market. [0003] The fertilization rate of fish eggs is mainly related to artificial germplasm cultivation, induced labor, sperm cryopreservation or embryo preservation technology, and embryo transportation technology. Osmotic antifreeze agent and open carrier cryopreservation method for grouper embryos, the method uses 1mol / L non-permeable sugar solution as antifreeze agent to obtain embryos developed to the sarcomere stage, tail bud stage or embryo body rotation stage Carry out cryopreserv...

AI Technical Summary

Problems solved by technology

[0006] How to improve the survival rate of fertilized eggs to the stage of opening fish flowers is currently no relevant patent literature in China, and the only papers are limited to: 1. Use eyed eggs for breeding and production (do not directly use fertilized eggs), use eyed egg ratio It is easier to check the fertilization rate of eggs and improve the survival rate of transportation by directly using fertilized eggs (Qi Zunli, Zhang Xiuwen, Fu Huiguang, Lun Yanxia. Atlantic salmon eyed egg hatching and fry cultivation [J]. Science Fish Culture, 2002, ( 7): The starting page number is none); 2. Use submerged plants to improve the hatching of fish eggs and the growth of larvae. When the coverage of aquatic plants is 25% and 50%, the survival rate of larvae is high, the deformity rate is low, and the average body length and The body weight is relatively high, but this article does not propose how to improve the survival rate of fertilized eggs to open fish flowers and propose a clear solution (Xu Qiujin, Yan Changzhou, Liu Liya, Li Haifeng. The impact of submerged plants on the hatching of zebrafish eggs and the growth of larvae [J]. Environmental Science Research, 2004, 17 (Supplement): 74-76.)

[0007] In artificial breeding, in the early cultivation of seawater fish seedlings, the traditional early cultivation methods include directly putting the fertilized eggs into the canvas bag to inflate for incubation and cultivating the fertilized eggs directly in the hatching bucket until the fish flowers are opened. There are two methods of operation. , the survival rate of these two methods from fertilized eggs to open fish flowers is not high, and the improvement of the survival rate at this stage has a huge potential for improving the survival rate of the entire breeding and breeding, which is to improve the survival rate of the entire seawater fish breeding An effective way, there are no relevant patents and other literature reports in China at present