CATDOLL : CATDOLL: How do snails reproduce?

How do snails reproduce?

1. Selection of parent snails for breeding of field snails

In the breeding of field snails, the selection and transportation of parent snails should be over 4 months old, weighing more than 30 grams, and with intact shells, to ensure the egg-laying rate and hatching rate. When selecting, attention should also be paid to the ratio of male and female snails, and a ratio of 4:1 is more appropriate.

Field snails are dioecious, and fertilization occurs internally. The main differences in appearance between male and female snails are: female snails are larger and male snails are smaller in the same age; female snails are short and thick, while male snails are slender; the female snails have a thin shell opening, sharp outer lips, and flat periphery of the carapace. The male snails have a thickened shell opening, with outer lips that tilt outward, a raised middle portion of the outer edge of the carapace, and upper and lower edges that sink into the soft body. When the snail body is 3 to 4 cm long and the shell is transparent, there is a light red dot on the right side of the middle of the first whorl of the male snail, which is the testis, while the female snails do not have it.

Because the snail shell is thin, it is easy to be crushed and kill.

． If transportation is required, be careful. Generally, use baskets for transportation. Use water grass as a cushion when placing snails, that is, one layer of snails and one layer of water grass. Layers are stacked one after another to protect the snails from damage. If it is transported over long distances, water should be sprinkled every 1 to 2 hours to keep the snails moist.

(II) Selection and cleaning of spawning grounds for snail breeding

In the breeding of field snails, the size of the spawning ground is determined according to the scale of production. Generally, there is no unified requirement, but the spawning ground is generally selected in a place with sufficient water source, good water quality, convenient water inlet and outlet, and quiet environment. The construction of the spawning ground can be carried out according to local conditions. Generally, the spawning pond can be selected from land, cement pool, ditch, etc.

It is also possible to cultivate snails by building a comprehensive spawning pool, hatching pool and nursery pool, that is, using a large pool with a small ditch, and each special pool is replaced by a ditch. The ditches are connected to form a curved channel to facilitate the circulation of water. The inlet and outlet holes are respectively set at both ends. For the convenience of management and operation, the spawning pool area should not be too large, and the length is generally unlimited. The width is more suitable for 1 to 1.5 meters, and the water depth can be maintained at 30 to 50 centimeters. If water is used

For mud ponds, the bottom of the pond should be covered with 3 cm thick silt, and newly built cement ponds should be soaked for 10 days before they can be used.

Before releasing the parent snails, the pond should be cleaned and filled with new water. Then bamboo pieces should be inserted around the pond and in the middle of the pond. The wood pieces should be 30 to 50 cm above the water surface. Some aquatic plants should be planted in case the female snails lay eggs. There should also be escape prevention facilities around the earthen pond.

(III) Stocking and cultivation of parent snails for breeding of field snails

During the breeding of field snails, the stocking density of parent snails should not be too large. 30 to 35 per square meter is appropriate, and less is appropriate: After the parent snails are released, intensive cultivation begins, feeding sufficient green fodder every day, such as vegetables, duckweed, terrestrial grass, etc., and appropriate concentrated feed, such as bean cake, wheat bran, rice bran, etc.

The feeding amount should be determined and adjusted according to the weather and feeding conditions. Do not feed too much concentrated feed to avoid affecting the water quality. Generally, the daily feeding amount is 0.5% to 0.7% of the total body weight of the snail. The daily feeding amount of green feed should be based on meeting its feeding needs. The green feed that has been eaten should be fished out every day. During the cultivation period, water quality management should be strengthened to keep the water clean. Generally, add water every 2 to 3 days.

Add new water once, or it is better to have clean water flowing in slowly, which is beneficial for the snails to lay more eggs and lay eggs earlier.

The parent snails can also be cultured after the young snails have been reared for 45 days and can be distinguished between male and female. The culture method is the same as above. After 3 to 4 months of rearing, they reach sexual maturity and can mate and reproduce on their own.

(IV) Collection and hatching of eggs for snail breeding

In the process of snail breeding, the collection and hatching of egg masses are intensively cultivated for 7 to 10 days, and then the parent snails begin to mate and lay eggs. The mating of new snails takes place during the day. After mating, the female snails climb on the stems and leaves of plants, the pool walls and floating objects in the pool at night, and leave the water surface to lay eggs. Each time, 500 to 2,000 eggs are laid, and the egg laying time lasts for 20 to 90 minutes. After laying eggs, they automatically fall into the water.

Field snails reproduce by mating and laying eggs. The mature eggs of field snails meet sperm and are fertilized at the top of the oviduct. The fertilized eggs undergo embryonic development in the uterus of the mother snail. After development is complete, they can give birth to offspring in batches. Reproduction usually begins in March and April each year.

The snail is an ovoviviparous animal with a unique reproductive method. The mature eggs meet the sperm at the top of the oviduct and are fertilized. The fertilized eggs undergo embryonic development in the uterus of the mother snail. Both the embryo and the young snail are completed in the mother's body, and this process takes about a year.

Do snails reproduce quickly? How do snails give birth to baby snails?

answer

The snails reproduce quickly. It takes about one year for the fertilized eggs to grow into baby snails. They start to reproduce in March and April every year. If you want to increase the reproduction rate of snails, you must first control the water temperature. Snails are cold-resistant but afraid of heat. The suitable environment temperature for their growth is 20-28°C. Once the temperature is lower than 10°C, they will burrow into the soil. When breeding, you can add some humus and phytoplankton into the breeding pond.

1. Do snails reproduce quickly?

1. The reproduction speed of snails is relatively fast. Generally, it takes about one year for the fertilized eggs to grow into baby snails in the mother's body. Snails lay eggs in batches and begin to reproduce around March to April every year. While producing baby snails, the female and male parent snails will mate and fertilize, and at the same time, the baby snails to be produced the next year will be bred in the mother's body. A female snail can produce 100-150 baby snails throughout the year.

2. If you want to increase the reproduction rate of snails, you must first control the water temperature. Snails are cold-resistant but very afraid of heat. The environment suitable for their growth is around 20-28°C. Once the temperature is below 10°C, they will drill directly into the soil. When the temperature is higher than 30°C, snails will also drill into the soil to avoid the heat. In hot seasons, if there is a lack of water, they will shrink into their shells, which can reduce the evaporation of body water.

3. Snails like to live in water rich in humus, such as ponds, swamps or fields with a lot of aquatic plants. Because there are many microorganisms, some phytoplankton, or moss in these places, when breeding, you can add some humus and phytoplankton to the place where the snails live.

2. How do snails give birth to baby snails?

1. The snail is a dioecious animal with different sexes. It is an ovoviviparous animal with a unique reproductive method. The mature eggs will meet the sperm at the top of the oviduct and be fertilized. The fertilized eggs can then develop into embryos in the uterus of the female snail. The mating behavior of the snail usually takes place during the day, and the mating time can reach 12 hours. The young snails are usually produced at night. The shell of the newly born young snail is 4-7 mm high. After one year of growth, their gonads will mature. During the reproductive period, the uterus of the female snail often contains young snails at different stages of development.

2. Snails have strong adaptability and can be raised in many flat rivers, streams, pits, rice fields, ponds, artificial cement pools and other common water bodies in rural areas. The size of the snail pond is usually 1.5-1.6 meters wide and 10-15 meters long. The specific size can be determined according to the terrain. The pond must be surrounded by ridges with a height of about 50 cm. Inlets and outlets can be set at both ends of the pond, and anti-escape nets can be installed to prevent the snails from escaping. At the same time, some phytoplankton can be planted in the middle of the breeding pond to improve the environment.

3. Most of the snails are naturally bred. When breeding, they can be collected manually by the riverside, paddy fields and other places, or they can be purchased in the market. When buying, you must choose fresh snails with light brown color, thin shell, round body and blunt tail as breeding snails. The stocking time of snails is generally in March. When stocking, you should pay attention to avoid hot and hot times. The stocking density is usually 100-120 per square meter. At the same time, you can also put about 5 silver carp, bighead carp and other fish species (summer flower) per square meter for main breeding.