Cage Culture Technology of Tilapia

Abstract: tilapia is resistant to hypoxia and fertilizer, and is afraid of cold and heat. It will frostbite when the water temperature is 12: 13 ℃. The survival temperature is 1535 ℃, and the critical temperature is 8.61 ℃ ±0.15 ℃. Therefore, when selecting the site in the reservoir, we must consider choosing the side of water quality fertilizer, shelter from the wind and sun, and high temperature, and do not put it at the tuyere of the reservoir.

Tilapia is resistant to hypoxia, fertilizer, cold and heat. When the water temperature is 12-13 ℃, it will be frostbitten. The survival temperature is 15-35 ℃, and the critical temperature is 8.61 ℃ ±0.15 ℃. Therefore, when selecting the site in the reservoir, we must consider choosing the side of water quality fertilizer, shelter from the wind and sun, and high temperature, and do not put it at the tuyere of the reservoir.

Cage structure and layout

It can be made into a cage with a size of 1 meter × 1 meter and a mesh of 3 cm. The bottom of the box is made of dense mesh cloth with a side height of 20 cm to prevent the loss of bait. Install a trap lamp at 50cm to 30cm above the top of the fully enclosed cage, and set a black plastic oblique tube or black iron tube with a diameter of 10cm on the corner of the net cover as a bait pipe. Bamboo (10 cm thick in diameter) is used as the whole frame of the cage, and the top of the cage is made of black woven fabric to make a hat larger than the lid of the box, which is used to shade the tilapia in the box, avoid human interference from the outside, avoid the interference of animals, and protect the safe eating of the fish. In a dark environment, the amount of fish activity is greatly reduced, which is conducive to growth. The distance between the cages is 2 to 3 meters, with a zigzag arrangement.

Sowing time

Fish can be released when the water temperature is about 24 ℃. It is easy to frostbite fish when the water temperature is below 20 ℃. Therefore, planting seeds after 20 ℃ of stable temperature is beneficial for fish to start eating early.

Stocking density

Tilapia with a tail weight of about 40 grams will be planted in a cage of 330 million per square meter.

Feeding method

The fish that just entered the box should be fed with a small amount of palatable bait and fed stably four times a day after a few days. Water temperature 28: 32 ℃ is the golden water temperature for tilapia to eat. Feed more. Often mixed with Chinese herbal medicine in the bait is the key point of disease prevention. In the season of flying insects, open the net cover at night, turn on the lights to lure insects and feed the fish, and add the net cover during the day. It is most useful for fish to eat insects without harming the fish or getting sick. The net cover creates a dark environment, and the good fish in the water grow continuously.