How to raise green spots?

1. Site selection: The location of the pond and its environment are the necessary conditions for the ecological stability of the aquaculture water body, the basis for the healthy culture of black spotted fish, and the key to success. Farms should choose areas where the water source meets the fishery water quality standards, and there are no industrial, agricultural and domestic pollution sources. Ideally, there are both seawater and fresh water, and the water source is relatively independent and the breeding density is small to reduce the cross-infection of pathogens. The salinity of seawater is 15 ~ 35, and it is appropriate that the salinity should not be lower than 15 in rainy season. The bottom material is sandy or sandy argillaceous, and impervious loam is the best; There is a high suitable temperature, which is beneficial to the rapid growth of black spotted fish; As well as areas with few typhoons, it is easy to build a shed, with convenient transportation and electricity, and it is easy to sell fish and buy fry feed.

2. The structure of the pond: the drainage facilities of the pond should not only discharge the lower water, but also discharge the surface water to prevent excessive algae growth or discharge too much algae and dirt when there is more dirt on the surface; Cement bottom and black plastic film bottom are better, but sand bottom is not suitable, because it is easy to be black, smelly and leak when breeding.

3. Seedling preparation: The water source should be filtered with a 60-80 mesh screen and injected into the pond to prevent harmful organisms such as wild fish, aquatic insects, tadpoles and jellyfish from entering the fish pond with the water.

4, fry stocking: first of all, we must choose good fry: it is best to buy grouper fry in the same size, because grouper is a kind of fish that has both the same kind of cannibalism and territory. The fish is required to have a complete body, bright colors, no trauma and easy feeding. The pectoral fin and dorsal fin of the fish are completely open, healthy and energetic.

5. Daily management: First of all, we should do a good job in feeding management, and feed mainly fresh or frozen miscellaneous fish and homemade wet pellet feed. According to the water temperature, weather and actual food intake, the daily feeding amount can be flexibly controlled, usually 1~2 times a day. When feeding grouper in pond culture point, it is necessary to choose a place with high habitat density and set up several feeding points, so as to feed at a fixed point and at a fixed time, and form the habit of feeding at a fixed point and at a fixed point. When feeding, cast less slowly first, and then cast more when a large number of fry are fed.

6. Disease prevention: During the breeding process, the water should be disinfected regularly, pay attention to the cleanliness of the inlet water source, pay attention to the situation of nearby brother farmers, enhance the awareness of prevention, and disinfect in advance in time or find relevant professional and technical personnel for analysis and treatment.