What is the breeding method of snails?

Like Ampullaria gigas, snails are also good feed for turtles.

(1) Oncomelania species The Oncomelania species distributed in China are Oncomelania, Oncomelania, Oncomelania and Oncomelania. The following is an introduction to snails in China, which are widely distributed in China. (2) Oncomelania hupensis likes to inhabit water environment with rich humus in sediments, such as lakes, ponds, swamps or slow-flowing rivers and ditches, and often feeds on microorganisms and humus in soil, phytoplankton in water, young aquatic plants and moss. I also like to eat artificial feed, such as fruits and vegetables, vegetable leaves, rice bran, wheat bran, bean flour (cakes) and leftovers from various animals. Snails are cold-resistant and heat-resistant, and the suitable temperature for their life is 20 ~ 28℃. When the water temperature is lower than 10℃ or higher than 30℃, stop eating, drill into the soil and enter the grass to avoid the cold and summer. When the water temperature exceeds 40℃, the snail is scalded to death. (3) The breeding habits of snails. The male and female snails are distinguished mainly by the shape of their right antenna. The right antenna of the male snail bends inward to the right (the bent part is the male genitalia). In addition, the female snail is big and round, and the male snail is small and long. Oncomelania hupehensis is an oviparous animal, and its reproduction mode is unique. The embryonic development and larval development of Oncomelania hupensis are completed in the mother body. It takes about a year for a fertilized egg to give birth to a small snail. Oncomelania hupensis lays eggs in batches and begins to breed in March-April every year. The female and male snails mate and fertilize at the same time, and at the same time, the young snails to be produced in the next year are bred in the female snail. The annual output of each female snail is about 100 ~ 150. (4) Pond conditions of river snails. The single pond area 100 m2 is suitable for river snail culture. The pool is rectangular, 80 cm deep and 50 cm deep. Sediment with the thickness of 10 ~ 15cm should be kept at the bottom of the pond. Some vines, fruits and vegetables are planted around the pond for shade, as well as bamboo tails, branches or stones, grass and so on. Arranged in the water for snails to live in seclusion. (5) The water body for snail culture requires snails to like slightly fat clean water, the water quality requires sufficient dissolved oxygen, and the pH value is about 7. The water body cannot be polluted by pesticides, fertilizers and industries. Snails have strong adaptability and few diseases. As long as a lot of poisoning is avoided, many flat rivers, streams, pits, rice fields, ponds and other ordinary water bodies in rural areas can be stocked. If you dig a special pond for aquaculture, you can choose a place with convenient water source and good water body. When cultivating, a small amount of duckweed and water lily can be cultivated on the water surface. (6) 10 Before releasing the seed snails, apply quicklime to the whole pond at a dosage of 50- 100 kg per mu to remove wild fish, shrimp and other miscellaneous snails. After 3-4 days, pile up organic fertilizer and culture bait organisms in the water for snails to eat. The stocking of seed snails is best completed in the early stage of snail breeding. The source of snail culture: one is field collection, and the other is market collection. Choose fresh snails, light brown in color, thin and complete in shell, and dim in dome. Generally, 0. 1 ~ 0.5 kg of seed snails per square meter are put into the natural extensive water body, and the seed quantity in the intensive culture pond can be increased by 2 ~ 3 times. The cultured snails can be farmed separately, or interplanted with some silver carp and bighead carp varieties, or mixed with snails and loach. (7) Careful feeding In the case of high-density artificial intensive cultivation, careful artificial feeding must be carried out. Snails don't need much nutrition. Rice bran, wheat bran and soybean powder were simply mixed at the ratio of 60%, 25% and 15% to make the first-class feed for snails. According to the feeding situation and climate of snails, snails have a strong appetite at a suitable temperature (that is, 20 ~ 28℃), and can be fed 1 time every two days, with a feeding amount of 2% ~ 3% of their body weight. When the water temperature is in the range of 15 ~ 20℃ and 28 ~ 30℃, it is fed twice a week, and the dosage is about 1% each time. When the temperature is lower than 15℃ or higher than 30℃, it is less than or equal to zero. (8) Daily management is strictly prohibited from flowing into water sources polluted by pesticides and fertilizers; Prevent the invasion of enemies such as ducks, snakes, rats and birds; Remove weeds and roots in water in time. Usually in the form of micro-running water, keep the water level at about 30 cm. Increase water flow in high temperature season, control water temperature rise, and ensure sufficient dissolved oxygen in water. In cold weather, snails hibernate in the soil. At this time, change the water 1 ~ 2 times a week, and sprinkle some chopped straw on the water to help snails overwinter. (9) Snail fishing When snails grow to about 65,438+80 kilograms, they can catch turtles and raise them. When collecting snails, we can adopt the method of catching large snails and keeping small snails, selectively catching adult snails and keeping young snails, paying attention to selecting some female snails and replanting them naturally, so there is no need to put in seed snails in the future. According to their living habits, in the hot season of summer and autumn, they choose to pick up bamboo branches and grass stems rotating on the shore or in the water body in the morning and evening; In winter and spring, choose sunny noon to pick. In addition, snails can also be harvested by catching them in the lower pool or picking them up in the drainage dry pool. It is best to feed the collected snails fresh on the same day, and do not leave them for too long.