Techniques of pollution-free culture of sea bass

I. aquaculture waters

The aquaculture waters are generally required to be 2 mm2 / 2.5 m deep. Half a month before the fry is released, the surrounding waters are disinfected with quicklime.

2. Stocking density and disinfection of seedlings

The stocking specification is 0.5g/ tail-0.6g/ tail, and the stocking density is 100tail / mu-120tail / mu. Soak in 0.5% mi 1% salt for 5 minutes before stocking; seedlings should be operated carefully to avoid seedling injury.

III. Feeding and management

1. Domestication: perch fry are put into cage 2mi for 3 days, and a small amount of miscellaneous fish are put in every day. When most of the fish are fed on the surface of the water, they are fed to the fish three times a day.

2. The small miscellaneous fish caught locally are mainly fed, and the fish are fed three times a day.

3. Feeding method: adhere to the "four-fixed" principle of quality, quantity, timing and fixed point.

IV. Water quality management

To achieve fresh water quality, frequently change water, add water frequently, and keep the capacity in the water not lower than 3mg/L.

Fifth, patrolling the pool

Persist in patrolling the pond in the morning, in the middle and in the evening, keep abreast of the eating situation of perch at any time, adjust the feeding amount, observe the activity of perch, check the water color, measure the water temperature, pick up the dead fish in time, find out the sick fish in time, find out the condition, and make the patrol log as soon as possible.

VI. Control of diseases and insect pests of sea bass

1. drug prophylaxis. Adhere to regular disinfection of aquaculture waters, feed disinfection, tool disinfection, give priority to prevention, prevention is more important than treatment. Take precautions ahead of time. Preventive measures can be taken by hanging bags of crystal trichlorfon around the cage. It is best not to use the way of pulling the net to sprinkle, because the size of the diseased fish is relatively large, a pulling net will aggravate the abrasions on the body surface of the diseased fish at the same time as the normal fish, thus further aggravating the condition.

2. Isolation of diseased fish. In the process of culture, strengthen the inspection of the pond, find sick fish, isolate and raise them in time, and deal with them with drugs.

3. Prescribe the right medicine to the case. After discovering the pathogen of the sea bass disease, ask the technical staff to check the guidance in time, and prescribe the right medicine according to the condition of the sea bass.