Eriocheir hepuensis Dai 1994 is a large-scale edible crab originating from Guangxi. It grows rapidly and has a delicious flesh. It is a new breeding breed with great potential for development.
The production process of the Hepu Crab Crab Crab Crab Industrialization is as follows: parent crab selection and retention, pro-crab culture, mating spawning, hatching crab culture, hatching, braided larvae cultivation, and large eye larvae cultivation and desalination.
The criteria for the selection of the pro-crab crabs are: strong physique, complete appendages, and no parasites on the body surface. The abdomen of the female crab is wide and covers the entire abdomen, and the hair on the periphery is reached; the male crab has a thick chewing claw and the hair on the chela reaches up to more than 80g. The selected pro-crab can be put in a plastic greenhouse and raised once a day. The fish can be fed once a day and can be fed with fish, shrimp, snail meat, grains, aquatic plants and granular shrimp. In the 20-30 days before the nursery, select well-proven crabs to place the heat preservation tank. Male to female ratio: 2:1, stocking density 2-3/meter, salinity 14-25 cubs, female crabs begin to hold eggs for 7-10 days, and the brooding crabs can be moved to another pool, and the remaining leaves are continued to be mated. egg.
The fertilized crab can regulate the embryonic growth rate through temperature control. Normal winter natural water temperature hatches about 30 days. When the water temperature is 20-25 °C, it can hatch and emerge in 15 days. During the period, attention should be paid to uninterrupted oxygenation, and the water temperature should be maintained at 18-26°C. Salinity 14-25 ‰. If it is found that the emergence of larvae after the second day of feeding unicellular algae. Breeding of juvenile larvae usually takes 9-16 days, which is the most difficult part of the whole breeding process, especially the highest mortality of stage IV. The disease prevention measures can change water 1 or 2 times a day, changing water 1/3 to 1 each time. /2, apply 1ppm oxytetracycline after changing water. The best bait is unicellular algae and Artemia nauplii. After 9-16 days of cultivation, the juveniles develop into big-eyed larvae. The bait is mainly of the annual insects. The eggs are fed properly, the water is changed every day, and fresh water is exchanged into the fresh water on the third day to gradually reduce the salinity. It fades completely after 2-3 days.
The production process of the Hepu Crab Crab Crab Crab Industrialization is as follows: parent crab selection and retention, pro-crab culture, mating spawning, hatching crab culture, hatching, braided larvae cultivation, and large eye larvae cultivation and desalination.
The criteria for the selection of the pro-crab crabs are: strong physique, complete appendages, and no parasites on the body surface. The abdomen of the female crab is wide and covers the entire abdomen, and the hair on the periphery is reached; the male crab has a thick chewing claw and the hair on the chela reaches up to more than 80g. The selected pro-crab can be put in a plastic greenhouse and raised once a day. The fish can be fed once a day and can be fed with fish, shrimp, snail meat, grains, aquatic plants and granular shrimp. In the 20-30 days before the nursery, select well-proven crabs to place the heat preservation tank. Male to female ratio: 2:1, stocking density 2-3/meter, salinity 14-25 cubs, female crabs begin to hold eggs for 7-10 days, and the brooding crabs can be moved to another pool, and the remaining leaves are continued to be mated. egg.
The fertilized crab can regulate the embryonic growth rate through temperature control. Normal winter natural water temperature hatches about 30 days. When the water temperature is 20-25 °C, it can hatch and emerge in 15 days. During the period, attention should be paid to uninterrupted oxygenation, and the water temperature should be maintained at 18-26°C. Salinity 14-25 ‰. If it is found that the emergence of larvae after the second day of feeding unicellular algae. Breeding of juvenile larvae usually takes 9-16 days, which is the most difficult part of the whole breeding process, especially the highest mortality of stage IV. The disease prevention measures can change water 1 or 2 times a day, changing water 1/3 to 1 each time. /2, apply 1ppm oxytetracycline after changing water. The best bait is unicellular algae and Artemia nauplii. After 9-16 days of cultivation, the juveniles develop into big-eyed larvae. The bait is mainly of the annual insects. The eggs are fed properly, the water is changed every day, and fresh water is exchanged into the fresh water on the third day to gradually reduce the salinity. It fades completely after 2-3 days.