Culture technique of Oncomelania hupensis, the best economic crop

Fushou snail, also known as large bottle snail, apple snail, originating from Amazon River City in South America, is a large edible snail. The shell of Fushou snail is thin and fleshy, and the edible part accounts for 46% of the snail body weight. 48%. The meat of Oncomelania hupensis has high medicinal value and can be used as a high protein feed for fish. The feeding and management techniques of Oncomelania hupensis are introduced as follows.

I. Culture conditions

Fushou snail likes dampness and is afraid of light. It is suitable for growing in ditches, shallow lowlands, fish ponds, farmland, canals and artificial cement ponds. A general water depth of 50 to 100 cm is appropriate. Can also be used in large and small water cities, such as lakes, reservoirs, rivers, etc.) with cage high-density culture, family small batch breeding available water tanks, tanks and basins, and so on. The dam in which the snail is raised should be more than 30 centimeters above the surface of the water to prevent omnivorous fish from crawling out of or near fish ponds to eat young snails. Barbed wire, polyethylene cloth or bamboo foil and other blocking equipment should be installed at the water injection outlet to prevent climbing when draining. Snail ponds close to farmers must be surrounded by bamboo fences and other blocking facilities to prevent livestock and poultry from invading.

2. Stocking snails

Choose healthy, active, undamaged snails with a weight of 30 to 50 grams and grow up in the same year. Generally, 60 to 80 species of snails are released per square meter, and the ratio of female to male snails is 5:1. In the pond where snails are reared, bamboo poles, wood strips and other fixtures should be inserted for them to lay eggs.

III. Feeding and management

1. Oncomelania hupensis is a kind of omnivorous plant snail, which is mainly plant feed and a small amount of concentrate feed. In order to increase the nutrition of snail species and improve the fecundity and hatching rate of snails.

2. First, change the water every 5 days, and then pay attention to pesticides and other toxic substances that pollute the water source. Third, attention should be paid to the change of water temperature. The most suitable growth temperature of Oncomelania hupensis is between 24C-30C. When the water temperature is lower than 10C or higher than 40C, measures of heat preservation and cooling should be taken in time to prevent the growth and development of Oncomelania hupensis from being restrained.

IV. Artificial propagation

Oncomelania hupensis is dioecious and oviparous. In general, young snails can spawn and reproduce in about 100 days.

Sexually mature female snails lay eggs every 5 to 10 days. At natural temperature, the breeding period of Oncomelania hupensis is 6 to 9 months. The fertilized egg nephew can hatch young snails at 15 jumps. But in the incubation period to prevent ants, spiders, cockroaches and other natural enemies. In order to improve the reproduction rate, the artificial incubation method can also be used, that is, a water tank with a depth of 10 cm is used, a 5 mm mesh screen plate is placed on the water surface, and the fertilized eggs laid on the pool wall are scraped off with a knife, and the young snails can be hatched in 12 days by keeping the water temperature at 28C.

5. Species of snails overwintering

Oncomelania hupensis generally stops feeding and growing below 10C and enters a dormant state. About 5C is the critical temperature of death. Thermal insulation methods should be in line with local conditions, or hot springs, power plants, hot water insulation; or plastic greenhouse, deep well insulation; indoor heating can also be used. The heat preservation temperature should be higher than 6C.