Pike crabs are flying crabs.1, pond treatment: the pond depth requirement is more than 5m, the substrate is suitable for muddy and sandy, after clearing the pond into the water and apply fertilizer to fertilize the water.2, stocking: stocking from late May to mid-June, 1000-1500 crab seedlings per mu pond, specifications of 80-100/kg.3, feeding: pre-cultivation, mid-term, In the later stage, the daily baiting amount is about 8%, 12% and 5% of the crab's body weight respectively.

I. Is the pike crab a flying crab

1. The aliases of the pike crab are flying crab, three-point crab, child crab, gun crab, sea crab, and cover fish.

2, the weight of Portunus trituberculatus is generally 400g, the body width is about 20cm, and the maximum can reach 1000g. The body of Portunus trituberculatus is mainly divided into the head, thorax, abdomen, and appendages, and is divided into 20 segments, with 5 segments of the head, 8 segments of the thorax, and 7 segments of the abdomen. Among them, the head and thorax gradually healed, together known as the cephalothorax, is tea green, and the abdomen is close to the ventral surface of the cephalothorax, called ? Crab navel? (The male crab has a triangular abdomen, commonly known as? The umbilicus is called the pointed umbilicus. (The male crab has a triangular abdomen, commonly known as the "pointed navel", and the female crab has a rounded abdomen, commonly known as the "round navel"). round umbilicus?) The first pair of footsteps is the ao-feet. The first pair of footsteps for the aopods, its long section of the posterior edge of the end of a spine, the second to the fourth pair of footsteps is flattened, the knuckles pointed, mainly for crawling, the last pair of footsteps flattened and wide, the knuckles are lamellar.

Second, the pike crab breeding methods

1, pond treatment

(1) pond depth requirements in more than 5m, the substrate to the sandy soil is preferable, near the sea area.

(2) Before stocking, the excess silt on the bottom of the pond is cleaned up, while the substrate is turned and exposed to the sun.

(3) The bottom of the pond is laid with cement pipes, tiles, bamboo tubes and other items for the pike to hide.

(4) About 15 days after the pond is cleared, the water is fed (60-mesh sieve silk screen filter is laid at the water inlet), and the water depth is controlled at about 80cm.

(5) After the end of water intake, apply 1.5kg of nitrogen fertilizer and 0.3kg of phosphate fertilizer per mu of pond for fertilization, and at the same time control the water transparency of the pond at about 30cm.

2, stocking

(1) Generally in late May to mid-June each year for stocking.

(2) The water temperature is above 18℃, the daily temperature difference is below 8℃, the salinity is 18-32, the ph is 7.8-8.6, the content of ammonia nitrogen is less than 1mg/L, and the amount of dissolved oxygen is more than 5mg/L.

(3) Each mu pond is stocked with 1000-1500 crab seedlings, with specifications of 80-100/kg.

3. Feeding

(1) The bait is mainly fresh fish, shrimp, shellfish and crabs.

(2) In the early stage of aquaculture, the daily baiting amount is about 8% of the crab's body weight. In the middle stage of aquaculture, the daily baiting amount is about 12% of the crab's body weight. In the late stage of aquaculture, the daily baiting amount is about 5% of the crab's body weight. When the water temperature drops to 10-15℃, the daily feeding rate is about 3% of the crab's body weight. When the water temperature drops below 10℃, no bait feeding is needed.

(3) Feed once in the morning and once in the evening, more in the evening and less in the morning.

4. Management

(1) During July, change the water every 2-3 days; during August-September, change the water every 1-2 days; during October, change the water every 4-5 days.

(2) Morning and evening inspections of the pond to observe the bait residue in the pond, as well as changes in water quality.

(3) Do a good job in the prevention and control of gangrene virus disease, small ribonucleic acid virus disease, bacterial diseases, and fungal diseases such as water mold, trichoderma, and streptococcus.