Grouper breeding method

Abstract

The invention relates to a breeding method, in particular to a grouper breeding method. The grouper breeding method comprises the following steps that before grouper eggs are put, a circulating watersystem with the water temperature control, sterilization and filtration functions is adopted for conducting water circulation treatment on a breeding pond, and bacillus subtilis is added; after the circulating water system is closed, the grouper eggs are put, and the water temperature of the breeding pond is controlled to be 25-30 DG C; 6 days after the grouper eggs are hatched, the circulating water system is started, and water circulation treatment is conducted on the breeding pond till grouper breeding is completed; and 3 days after the grouper eggs are hatched, live bait is fed, and different live bait is fed at different growth stages till grouper breeding is completed. According to the grouper breeding method, the water circulation system is continuously conducted in the breeding process to keep the water environment stable, the breeding period is shortened, disease invasion is reduced, dependence on a high-quality water source is reduced, the control strength on the breeding water quality is improved, and the breeding success rate is increased.

Description

technical field [0001] The invention relates to a method for raising seedlings, in particular to a method for raising seedlings of grouper. Background technique [0002] Grouper belongs to Perciformes and Grouper family. It is a precious marine fish with high nutritional value, and it is also an important marine aquaculture species in the coastal areas of South my country. In recent years, with the development of grouper aquaculture, the demand for seedlings by aquaculture enterprises has increased year by year, but there has been no new breakthrough in grouper seedling technology, and it still remains in a relatively extensive seedling stage. [0003] At present, the methods of raising grouper seedlings include indoor factory seedlings and outdoor high-level ponds. These two seedling methods are affected by weather changes, algae water supply problems, and later water quality deterioration, which makes the seedling stage susceptible to diseases and has a low success rate. ...

AI Technical Summary

Problems solved by technology

In recent years, with the development of the grouper aquaculture industry, the demand for seedlings of aquaculture enterprises has increased year by year, but there has been no new breakthrough in the grouper breeding technology, and it is still in a relatively extensive nursery stage

[0003] At present, there are two types of grouper breeding methods: indoor factory breeding and outdoor high-level pond breeding. Both of these two breeding methods are affected by weather changes, algae water supply problems, and water quality deterioration in the later period, which makes the breeding stage susceptible to disease and low success rate.

[0004] The traditional breeding method uses oyster fertilized eggs as grouper bait. The quality of oysters is uneven, and is also affected by market supply and seasons. Oyster fertilized eggs can not meet the nutritional needs of fry when they develop to the stage of trophoid larvae. At the same time, oyster fertilized eggs Feed twice a day and spend more time squeezing oysters

Traditional nursery methods use copepods as grouper bait in the middle and later stages. Copepods are usually collected from shrimp ponds. Due to the long transportation time and improper collection methods, the survival rate of copepods is lower than 50%, especially in In summer, affected by high temperature, the mortality rate may be higher than 80%

Fry basically does not feed on dead copepods, and feeding them into nursery ponds can easily cause water quality to deteriorate. At the same time, fry can easily bring in a large number of pathogenic microorganisms through oysters, shrimp ponds, etc. Seedling survival rate is low

[0005] Traditional seedlings need to cultivate chlorella, and add a certain amount of algae water to the nursery pond every day to purify the ammonia nitrogen and nitrite in the seedling water. In the later stage of seedling cultivation, the sediment needs to be cleaned by bottom suction, and the water environment is easily affected by weather changes. (Overcast and sunny, air pressure changes, abnormal temperature, etc.), there will be problems such as algae blowing, pH value and dissolved oxygen decrease in the nursery pond, resulting in stress death of fry

[0006] In the patent with the publication number CN201510222650.5, a grouper breeding method and system are disclosed, which sequentially performs mechanical filtration treatment, floating bed biochemical treatment, sterilization treatment, microfiltration treatment and water quality adjustment treatment on the breeding wastewater, so that it Reaching the preset aquaculture index is used as aquaculture seawater for recycling, but the purpose of the recycling system is to reuse the wastewater, and the floating bed biochemical treatment used in it makes the water quality change unfavorable to the stability of the water

[0007] In the patent with the publication number CN202010118340.X, a cultivation method for improving the disease resistance and stress resistance of grouper fry is disclosed. It feeds Artemia nauplius and compound feed, and feeds the cultivation method of SS type wheel , the nutritional adjustment of fish species in different periods, improve the immunity of fry, and improve the resistance and disease resistance of grouper, but it needs to add compound feed, which includes krill powder, Bacillus subtilis and Lactobacillus rhamnosus Baking powder, lecithin, corn starch, seaweed powder, vitamin B12 and 2-4 parts of binder; the addition of compound feed will easily make the water edge turbid, which is not conducive to the stability of the aquaculture water environment, and is also not conducive to the water Artemia nauplii The survival of Artemia nauplii indirectly increases the cost of adding Artemia nauplii