2. There are two main ways of adult grouper culture: net box culture and pond culture, with net box culture being more common. Grouper culture in net box is a kind of intensive aquaculture, high stocking density, easy to manage, high production efficiency, so it develops very quickly.
3, aquaculture sea area environment should have the following conditions: good wind conditions, waves are not big, not attacked by typhoons; sandy bottom, gravel bottom, reef bottom is good, low tide depth should be more than 4 meters; tidal current is smooth, the flow rate is moderate, the flow rate in the nets to maintain in the 0.20 m / s ~ 0.75 m / s is good; the lowest water temperature in winter is not less than 15 ℃, 22 ℃ ~ 28 ℃ water temperature days Not less than 200 days; fresh water quality, grouper on the salinity of a wide range of adaptation, between 11 ‰ - 41 ‰ can survive, the most suitable in the appropriate salinity 25 ~ 32 ‰, pH = 7 ~ 9, dissolved oxygen in 5 mg / liter or more; not industrial and agricultural wastewater, urban sewage pollution, no large amount of freshwater inflow in the rainstorm season, the salinity is not less than 16, the transparency of the more than 1.5 meters; good transportation conditions, live fish Transportation, feed supply is convenient.
4. At present, the grouper nursery has not yet reached the requirement of productivity, so the cultured fish are all still raised as fry with the juvenile fish caught in the natural sea area. The cultured grouper larvae caught by hand-fishing is good. When selecting, attention must be paid to the quality of the fish. Fish that are strong, vigorous, free of disease and scale damage, and with good glossy skin color should be selected for culture.