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Field snails have been heavily cultured in Japan. Because the method of breeding snails is simple, the disease is small, and the source of seedlings is easy, it can be kept in the family.
The two genera of the snail and round snail of the Chinese snail family are: snail, whose spiral layer does not swell, but has a spiral ribbon, such as long spiral snail; round snail, shell surface is smooth, spiral layer expands, there is Chinese round snail and China Round snail two. At present, in China's North China, the Yellow River Plain, and the Yangtze River Basin, common areas are the Chinese round snails.
The snails can be cultivated individually, as well as polyculture with squid, loach, etc.; they can be kept in paddy fields or in recreational fields, or they can be kept in ponds or fluvial channels. The optimum growth temperature of snail is 20-25°C. When the temperature is below 15°C or above 30°C, feeding activities are stopped. Hibernation occurs at temperatures below 10°C, and breeding begins when the temperature rises above 15°C. Each snail produces about 20～ Thirty and more than 4 instar snails can produce 40-50 eggs. After 14 to 16 months to reproduce again. The male and female of snails are difficult to identify on the outer shell. According to the identification of antennae, the right tentacles of male snails are spirally bent to a certain extent (this antenna serves as a transfer), and the shape of the female antenna snails is exactly the same. In the breeding process, snails have fewer diseases and high survival rates, but they must prevent birds from escaping and escaping when they are raised in paddy fields. Closer fences should be set at the inlet and outlet. Snails are more sensitive to oxygen, poor intake when oxygen levels are below 3.5 mg/l, and death when they reach 1.5 mg/l.
The food of the snails is very wide. When feeding, rice bran, vegetable crumbs, fish meal, etc. can be fed, and artificial feed can also be fed.
The time for snails' activities is generally between 7 pm and 9 am the next day. The catching method is simple. Just mix the degreasing rice bran with the soil phase and put it into several places in the paddy field. At this time, snails will gather and eat and pick up by hand. If they are stocked in paddy fields, 1,500 to 1,800 can be stocked every 10 square meters.
Freshwater Fisheries Research Center
Snail cultivation techniques
The snail is thick and nutritious, and it is a very good bait after shattering.