Grouper is an important economic species for coastal aquaculture in the South China Sea. The South China Sea is surrounded by the sea and has unique marine resource advantages. It provides abundant resources for the development of marine aquaculture. It uses ponds to culture groupers and cage fish. There are more and more grouper fish cultured, and colleagues have continued to see good prices for grouper fish, and the market has been smooth. Grouper fish farming has grown rapidly.
First, production conditions
1 Site selection: good shelter conditions, little waves, no typhoon attack; sandy bottom, gravel bottom, reef bottom is good, water depth at low tide should be more than 4 meters, minimum water temperature in winter is not lower than 15°C, 22 °C ~ 28 °C water temperature days not less than 200 days; fresh water, suitable salinity 25 ~ 32 ‰, pH = 7 ~ 9, dissolved oxygen above 5 mg / liter, non-polluting areas
2 seed selection: broodstock can be used for artificial breeding of adult fish or adult fish harvested in the natural sea area. Females choose to weigh 5 kg to 8 kg, abdominal enlargement and softness; males choose to weigh more than 8 kg, light pressure on the abdomen can flow out of semen. The male and female brood fish are stocked at a ratio of 3:1 to 8:1 and stocked or raised grouper broodstock in indoor cement pools, artificially intensively cultivated, changed water and sucked daily, and broodstock can naturally spawn without hormone production. Fertilization provides good quality fertilized eggs.
3 Feed: Grouper is a carnivorous fish, the main feed used for feeding is a high-grade small trash fish. Generally, according to the size of the grouper, the fish is cut into a suitable size and then fed with a fish cutter.
4 Daily Management: Choose a reasonable cage and fish row density to prevent the occurrence of oxygen deficient accidents. During the breeding process, in addition to feeding, observations of fish growth, food intake, activities, and body color should always be observed. Frequently inspect the cages for damage, how many organisms are attached, and regularly remove the fouling organisms attached to the cages. In order to maintain the smooth flow of water inside and outside the cage, regular monitoring of water quality and protection of the breeding environment. According to the first type of marine water quality standards promulgated by the State to monitor aquaculture water, it is conducive to the normal growth of groupers and delicious meat to prevent accidents caused by water quality deterioration.
5 Diseases and treatment: In the process of grouper fish breeding, small melon worms are prone to occur in April, blister disease of juveniles occurs in July, and ringworm disease occurs in August. The most serious is the blister disease of leeches. The activity led to a slow development. In this case, the researchers used Chinese medicine to treat tea bran + Chuanxiongzi + Sophora chinensis + Baibu + Guanzhong to take 250g each, and add 2000ml boiling water for half an hour. Better results.
Grouper fish farming process control of culture density, reasonable stocking, strengthen bait management, feed food fresh and appropriate, maintain good water quality, enhance fish disease resistance, find dead fish in a timely manner out of landfill treatment, tea bran on the environment Pollution is a good insecticide for cleaning fish ponds.
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