CATDOLL : CATDOLL: How to breed screws

Question 1: How do snails give birth? The snails are ovoviviparous animals with a unique reproductive method. The embryonic development and the development of the snails are completed in the mother's body. From the stimulated eggs to the birth of the snails, it takes about a year to incubate in the mother's body.

The snails lay eggs in batches, starting to reproduce in March and April every year. While producing young snails, the female and male parent snails mate and fertilize, while the mother snails are nurturing the young snails to be produced the next year. A female snail produces about 100 to 150 young snails a year.

Question 2: How do snails reproduce? The parent snails used for reproduction can be collected from rice fields, ponds or ditches. The selection criteria for breeding parent snails are: light color, thin shell, round body, large size, no damage to the shell, and complete cover of the shell mouth. Female snails are large and round, with the left and right antennae of the head being the same size and extending forward; male snails are small and long, with the right antennae thicker and shorter than the left antennae, and the ends are bent to the right and inward, and the bent part is the reproductive organ. April, May and October are the reproductive seasons of field snails. Generally, each litter can produce 20 to 30 snails, and as many as 40 to 60. More than 150 can be produced in a year. After 2 to 3 weeks after birth, the snails weigh 0.025g and can start to eat. Generally, they can reproduce after one year of feeding. In a special pond for snail breeding, 100 to 150 snails can be placed per square meter; if natural waters are used, 20 to 30 snails per square meter is appropriate.

Question 3: Does the snail reproduce sexually or asexually? The life cycle of schistosomes includes six stages: adult, egg, miracidium, sporocyst, cercariae and schistosoma. People or other mammals infected with schistosomes excrete eggs from their feces. If the feces contaminate the water, the eggs are carried into the water and hatch into miracidia in the water. Miracidia can swim freely in the water and actively drill into the body of the snail in the water, develop into mother sporocysts, reproduce asexually, and produce daughter sporocysts. The daughter sporocysts reproduce again to produce a large number of cercariae, which leave the snail and swim freely in the water. When people come into contact with water containing cercariae through various means such as production labor, domestic water, swimming, etc., the cercariae quickly drill into the human skin and turn into schistosoma after entering the skin. After a certain period of growth and development, they eventually settle and parasitize in the blood vessels near the liver and intestines, and mature into adults. Male and female adults hug each other, mate and lay eggs. Each female can lay two to three thousand eggs a day. Such a cycle is the life of schistosomes, that is, the life history. In the life history of schistosomes, there are two hosts. One is the human and other mammals parasitized by the adult worms, called the definitive host. Many kinds of mammals can become the definitive hosts of schistosomes; the other is the snail parasitized by the larvae, called the intermediate host. The snail is the only intermediate host of Japanese schistosomes. The appearance of the snail The shell of the snail is conical, like a small screw, hence the name snail. The snail consists of two parts: the shell and the soft body. The front part of the soft body is the head, neck, feet and mantle, and the back part is the internal organs. The shell has 6-8 spirals. Those with longitudinal ribs on the surface are called ribbed snails, with a shell length of about 10 mm and a width of about 4 mm. They live in lakes or water networks; those with smooth shells are called smooth snails, which are slightly smaller than ribbed snails, with a length and width of 6 mm and 3 mm respectively, and are more common in hilly areas. The snail shell mouth is oval, with a complete periphery, slightly turned outward, and with horny opercula. Oncomelania snails are amphibious animals, with male and female, and are usually active when the temperature is 15-20 degrees. They mainly survive by eating algae. The activity range of the snail itself is not large, but the snail can drift to a very far place with the water flow, or it can attach to weeds or other floating objects and spread to a distant place. People's straw shoes, gaps between cow hooves, cutting water grass or transplanting aquatic plants (such as reeds, wild rice stems, etc.), and transporting fish fry can also cause snails to spread. After the snail spreads, it will "settle down" and reproduce in a suitable environment, forming a new snail breeding ground. The life span of Oncomelania snails is generally 1 year, some can live for 2-3 years, or even more than 5 years. Oncomelania snails infected with Schistosoma japonicum miracidia are called infected snails, and the life span of infected snails is generally less than 1 year, and the longest can survive for more than 2 years.

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Question 4: How are snails that we usually eat at home raised? Are you talking about field snails? If so, I have the following answer:

(I) Selection of snail breeding sites

The snail breeding site should be selected in a place with sufficient water source, good water quality, humus soil and convenient transportation. It is best to have running water.

Construction of breeding pond. The specifications of snail pond are generally 1.5-1.6 meters wide and 10-15 meters long, and can also be based on the terrain. The pond is surrounded by ridges, which are about 50 cm high. Inlets and outlets are opened at both ends of the pond, and nets are installed to prevent snails from escaping. At the same time, aquatic plants such as wild rice stems are sparsely planted in the middle of the breeding pond, which can not only increase the land output rate, but also create a good ecological environment for the growth of snails.

(II) Stocking quantity and feeding management

1. The stocking density of snails is generally 100-120 per square meter. At the same time, about 5 silver carp and bighead carp are raised per square meter for the main breeding. The stocking time of snails is generally in March.

2. Fertilization and feeding. First, add some feces to the breeding pond to cultivate plankton to provide food for the snails. The amount of fertilizer depends on the fatness of the bottom of the snail pond. After the snails are put into the pond, feed them with green vegetables, rice bran, fish viscera or vegetable cakes, bean cakes, etc. Chop the green horns and fish viscera and mix them with rice bran and other feeds before feeding. Soak the vegetable cakes, bean cakes, etc. to soften them for the snails to eat. The feeding amount depends on the feeding situation of the snails. It is generally calculated as 1%-3% of the total amount of snails, and feed once every 2-3 days. The feeding time is every morning, and the feeding location does not need to be fixed. Feed is put every other day. When the temperature is below 15℃ or above 30℃, no feeding is required.

3. Water quality adjustment. First, the snail pond should be frequently injected with new water to adjust the water quality, especially in the breeding season. It is best to keep the water flowing, especially in the hot season, and the effect of water culture is better. In spring and autumn, it is better to use micro-flowing water for culture. The depth of the snail pond should be kept at about 30 cm. Second, adjust the pH of the water. When the pH value of the pool water is low, apply 0.15-0.18 kg of quicklime per square meter, and sprinkle it every 10-15 days to keep the pH value of the pool water at 7-8.

4. Management of snails during winter. When the water temperature drops to 8-9℃, snails begin to hibernate. During hibernation, snails use the top of their shells to drill into the soil, leaving only a small round hole on the soil surface, from which bubbles occasionally come out to breathe. Snails do not eat during the winter, but the water depth of the breeding pond still needs to be maintained at 10-15 cm. Generally, water is exchanged every 3-4 days to maintain the appropriate oxygen content.

Question 5: How to breed snails?

1. Pond selection: The area should be 3-20 mu, the depth should be 1-1.5 meters, the ratio should be 1:3, the bottom of the pond should be fertile, but not too deep, and there should be no river water around the pond. As for old ponds, due to the small number of beach feet, according to the habits of snails, snails like to live on the bottom with less silt. Based on this feature, it is recommended that the beach and embankment of the pond can be paved to increase the adaptation area of ​​snails. Another way is to use meshes erected around to further increase the snail breeding area.

2. Pond cleaning: After selecting the pond, the fish pond needs to be cleaned. The bank of the pond needs to be well built, and excess silt needs to be removed, especially the silt on the foot of the beach. If conditions permit, it is best to use sludge suction treatment.

3. Pond disinfection: Pond cleaning is completely prohibited. Generally, pond cleaning or pond disinfection can be used, but quicklime is the best. The dosage is 100-150kg/mu with water (30-50cm) and 50-75kg/mu without water. Quicklime pond cleaning has the following benefits: ① Increase pH value; ② Increase Ca content; ③ Can regulate water quality; ④ Can sterilize.

4. Selection of snail species: ① Appearance requirements: The snail tip is short and swollen, the shell has slight thorns, and the night is slightly red; ② Specification requirements: 60-100 pieces/jin; ③ Quality requirements: When frightened, the snail body quickly retracts into the shell, and is free of disease, injury, and insects.

5. Stocking time: Start stocking the fish 15 days after the medicinal properties disappear, and end around March 20.

6. Stocking density: Generally, 20-30kg/mu is stocked in the pond. It is best to raise 2-3 jin per mu. The snails cultivated will have particularly tender shells and thick meat.

7. Summer stocking: Stock mainly edible fish (grass carp, crucian carp, bream) in ponds, 5,000 to 8,000 per mu. In addition, stock 3 to 5 snails per mu, with a size of 10 per catty, to control the number of snails.

8. Feeding and

Generally, snails lay eggs many times, twice a year, one in spring and the other in autumn. Our snail farming mainly manages a batch of snails laid around Qingming Festival. It lays eggs in batches, just like the snails, and lays eggs in batches when mature. Generally, the young snails start to eat after 2-3 weeks. We can feed them at the same time as summer flower cultivation. According to the biological feeding habits of snails, snails mainly feed on phytoplankton and humus (including crumbs) in the water, just like the snails, and the effect is achieved through water filtration. As we all know, if there are too many snails, the water quality will become clear, and even milky white will appear, which means that the water quality has deteriorated. After this happens, especially in the summer stage, the first thing to do is to change the water; the second thing to do is to feed more soy milk, bean cake slurry or splash fermentation throughout the pond. The principle of small amounts and multiple times should be implemented in feeding and fertilization. If there are too many, a small amount of chips can be used to control it. After the summer flower cultivation is completed, vegetable cake or bean cake is the best feed. In terms of water quality management, it is necessary to keep the water quality fertile, fresh and tender, and fertilize and feed according to the water level.

9. Implement the principle of catching the big ones and leaving the small ones. During the breeding period, in order to increase the snail production, the principle of catching the big ones and leaving the small ones should be implemented. After May and June, the big snails can be caught first (breeding snails), and after 8 carcasses, the snails that meet the standard can be gradually caught. In the future, the snails can be caught one by one every 10-15 days depending on their growth.

10. Daily Management

⑴ Patrol the pond: Check the fish feeding situation every day and check whether there is lack of oxygen in the water. If there is lack of oxygen, start the oxygen pump or change the water in time, because when the oxygen content in the water is lower than 1.5mg/l, the snails will begin to die. In addition, the snails will also die when the water temperature exceeds 40℃.

⑵ Look at the water color: check the quality and fatness of the water, and adjust the water quality in time.

⑶ Disease prevention: Mainly prevent fish diseases, try to avoid using it, because copper sulfate has a killing effect on snails. Generally, quicklime and fungicides or oral medications are used to prevent and treat fish diseases. Quicklime should be used frequently throughout the breeding process, which can prevent diseases, increase calcium and regulate water quality. It is generally better to use it once every 15 days.

Question 6: I want to learn how to breed snails, can you help me? Generally, if you breed snails in a fish pond, they will breed automatically. But the fish you breed must not eat snails, such as black carp. And the water quality must be richer. In this way, the snails will grow faster!

Snails have a varied diet, grow fast, have strong adaptability, are easy to breed and raise, but prefer shade and are afraid of light, so they are suitable for paddy field farming. Especially in areas with abundant aquatic and grass resources, they have great development potential and broad prospects. The following is an introduction to the farming technology of rice field snails.

1. Rice field selection. Rice fields for snail farming should be selected in a way that is neither dry nor flooded. The ridges should be compacted and raised to more than 0.5m. Do not use agricultural machinery during farming, and do not plow or harrow, but weeds must be eradicated.

2. Water quality requirements. Snails are sensitive to dissolved oxygen in field water. When the oxygen content is lower than 3.5 mg/L, they cannot feed well, and they begin to die when the dissolved oxygen is 1.5 mg/L. Therefore, the field water must be fresh and have a high dissolved oxygen content.

3. Construction of rice field facilities. For breeding golden apple snails, the rice fields should be arranged into long strips with a width of 2-3m, and the water depth should be kept at 30-60cm. Some bamboo pieces and wooden sticks should be placed every 30cm in the middle for the golden apple snails to absorb. It is also possible to leave empty paths when transplanting rice. Within one week after transplanting the rice seedlings, dig a high-yield ditch with a width of 20-30cm and a depth of 13-17cm. A dense fence or a polyethylene net with a smaller mesh should also be set at the inlet and outlet of the rice field. Prevent rats, snakes, etc. from drilling holes and leaking water around the ridges to prevent the snails from escaping.

4. Release and management of golden apple snails.

① Growth pattern. The growth and development rate of golden apple snails is related to environmental conditions, feeding and gender. In hot seasons, with good water quality and sufficient feed, the growth is fast, otherwise it grows slowly. The growth rate is fastest in the middle snail stage, and slows down when the body weight is about 100g. In addition, the growth rate of female snails is slightly faster than that of male snails. Under artificial breeding conditions, when there is sufficient feed, the weight of newly hatched snails can reach about 25g after one month of feeding; about 50g after two months; 100~150g after three months; about 200g after six months; and 400~500g after one year.

② Stocking. When breeding golden apple snails in rice fields, stocking should be done at the right time, and the stocking density and specifications should be controlled. The stocking time should be from late June, 15 days after rice planting, to early August. Generally, 30,000 to 60,000 young snails weighing 2 to 4 grams should be stocked per hectare of rice fields. If there is abundant natural bait, more can be stocked; otherwise, less should be stocked to avoid affecting the individual size and group yield of golden apple snails.

③ Feeding and management. The feed for golden apple snails can be leaves and tender stems of various aquatic plants and terrestrial plants. To promote growth, it can be supplemented with concentrated feed. Feeding time can be done in the evening. Duckweed and tender grass can be collected while feeding. The daily feeding amount is about 10% of the total weight of the snail, and the ratio of green feed to concentrated feed is 5:1. Water quality management should also be strengthened during the feeding period. Generally, the water should be changed once every 3 to 4 days. Fertilization of rice in rice fields for snail breeding should be sufficient basal fertilizer once before planting, and appropriate supplementary topdressing. For the prevention and control of diseases and insects in rice fields, low-toxic and high-efficiency pesticides should be used for spraying with water, and should not be mixed with soil for spreading.

5. Stocking and management of screws.

① Stocking. The number of snails to be farmed should be flexibly controlled according to the situation, generally 90,000 to 105,000 per hectare. You can also stock brooding snails, generally 0.1 to 0.5 kg per square meter.

② Feeding. Snails have a mixed diet. In addition to natural bait, they can be fed with some green vegetables, bean cakes, rice bran, earthworms, etc., as well as other animal viscera and scraps. The bait should be fresh and can be fed 2 weeks after the birth of the young snails. When feeding, the solid bait should be softened first, and the fish offal, animal viscera, scraps, etc. should be chopped up, and then mixed with rice bran or bran before feeding. Feed once a day, and the feeding time is generally between 8 and 9 in the morning. The daily feeding amount is roughly 1% to 3% of the total weight of the snail, and its food intake can be adjusted appropriately as its weight gradually increases. For some more fertile rice fields, it is also possible not to feed them, and let them eat natural zooplankton and aquatic plants in the water.

When feeding, if the meat overflows after the shell of the snail shrinks, it means that the snail is calcium deficient. At this time, shrimp bran, shell powder, etc. should be added to the bait. If the shell sinks into the shell, it is due to insufficient bait and hunger. The amount of feeding should be increased in time to avoid affecting the growth and reproduction of the snail.

③ Feeding and management. The most important thing in feeding and managing snails is to pay attention to the water quality and water temperature. In summer and autumn, snails eat vigorously and it is also a high temperature season. Flushing and changing water for irrigation can reduce the water temperature and increase the dissolved oxygen content. In addition, water sources with high iron, sulfur and other content and industrial wastewater must not be used, because this will directly lead to the death of snails. ...>>

Question 7: How do snails reproduce? Snails are dioecious animals and need to mate to reproduce. In addition, snails are ovoviviparous animals with a unique reproductive method. The embryonic development and the development of the snails are completed in the mother's body. It takes about a year for the fertilized eggs to produce the snails. Snails lay eggs in batches and begin to reproduce from March to April every year. While producing the snails, the female and male parent snails mate and fertilize, and at the same time, the snails to be produced the next year are bred in the mother's body. A female snail produces about 100 to 150 snails a year.

Question 8: How many batches of eggs does a snail lay in a year? Snails are ovoviviparous animals with a unique reproductive method. The embryonic development and baby snail development of snails are completed in the mother's body. It takes about one month from the fertilized eggs to the birth of baby snails in the mother's body. Snails lay eggs in batches and begin to reproduce from March to April every year. While producing baby snails, the female and male parent snails mate and fertilize, and at the same time, the baby snails to be produced the next year are bred in the mother's body. A female snail produces about 100 to 150 baby snails a year.

Question 9: There are many small snails in the fish tank at home. They multiply very quickly and eat the water plants. How can I solve this problem? Put a few "ribbon pagoda snails" in. Go to Taobao and search. There are many for sale. I have some too, but I don't sell them.

----Abang.com Tropical Fish Helper

Question 10: I have kept snails in my fish tank for 3 years, but they still haven't grown any snails. How do snails mate? Will snails grow in my house? 20 points. The snail is an ovoviviparous animal with a unique reproductive method. The embryonic development and the development of the snails are completed in the mother's body. It takes about a year for the fertilized eggs to produce the snails. The snails lay eggs in batches and begin to reproduce from March to April every year. While producing the snails, the female and male parent snails mate and fertilize, and at the same time, they breed the snails to be produced the next year in the mother's body. A female snail produces about 100 to 150 snails a year.

Reproduction of snails: Snails are dioecious. The method of distinguishing male and female snails is mainly based on the shape of their right antennae. The right antennae of male snails bend inward to the right, and the bent part is the male snail's reproductive organ. In addition, female snails are large and round, while male snails are small and long. In nature, the proportion of female snails is often 70% to 80%, and the number is far greater than that of male snails.

To mate, the two snails entwine with each other and mate. After that, the female snail crawls onto the water plants or branches above the water surface to lay eggs.