Desalination seedling method for seawater miniatus groupers

Abstract

The invention discloses a desalination seedling method for seawater miniatus groupers. The desalination seedling method includes steps of 1, acquiring fertilized eggs of groupers; 2, incubating the fertilized eggs in nursery ponds to acquire seedlings, filling raw seawater in the nursery ponds and keeping the seawater temperature T to be higher than 28 DEG C and lower than 32 DEG C for 3-4 days; 3, gradually or directly reducing the salinity of water in the nursery ponds in the step 2 by 15%-25%, and keeping the salinity of the water unchanged for 6-10 days; 4, gradually or directly increasing the salinity of the water in the nursery ponds in the step 3 by 3%-7%, and keeping the salinity of the water unchanged for 3-5 days; 5, gradually reducing the salinity of the water in the nursery ponds until the salinity of the water is 0.4-0.8%, and keeping the salinity of the water unchanged for 15-30 days; 6, naturally cooling the water until the temperature of the water is equal to normal temperature, reducing the salinity of the water in the nursery ponds until the salinity of the water is 0.2-0.4%, and waiting for seedling emergence. The desalination seedling method has the advantages that the salinity of the water is changed according to a sequence of desalination, salinization and desalination, so that the adaptability of the grouper seedlings can be trained, and the seawater miniatus groupers can be cultivated in fresh water and become an aquaculture variety in fresh water regions.

Description

technical field [0001] The invention relates to a desalination breeding method of seawater golden grouper. Background technique [0002] Seawater golden grouper in seawater is golden and bright in color, delicious in taste and rich in nutrition. It has various values ​​such as ornamental, edible and medicinal. The market price is about 150 yuan per kilogram. It is famous, special, new and excellent. Sea products are in short supply in domestic and foreign markets. [0003] It takes about 2 to 3 years for seawater golden grouper to grow into commercial size in natural sea areas before reaching the commercial size of 500 g / tail. Most of the larvae hatched in the natural marine environment cannot adapt to environmental changes and suffer Eliminated and become the bait of other marine animals, the survival rate is low. Contents of the invention [0004] The invention provides a seawater golden grouper seedling raising method, which overcomes the deficiency in seawater golden...

AI Technical Summary

Problems solved by technology

[0003] It takes about 2 to 3 years for seawater golden grouper to grow into a commodity size in the natural sea area before reaching the commodity size of 500 g / tail. Most of the larvae hatched in the natural marine environment cannot adapt to environmental changes and suffer Eliminated, become bait for other marine animals, low survival rate