Feeding method of conch
First, the breeding environment
Stay away from other shellfish in the pond, choose a relatively flat place of about 5-6 mu, enclose it with a net of 22 mu, and handle the bottom well to prevent the escape from affecting the growth of other shellfish. Small bamboo poles should be scattered in the middle of the paddock to prepare for conch climbing and breathing in high temperature and hypoxia season; In the process of culture, the nets should be cleaned frequently to ensure the smooth convection of water sources inside and outside the purse seine, so as to ensure enough algae and shorten the culture cycle.
Second, seed selection
The source of fry is mainly marine fishing, and there are few artificial seedlings. From February to March every year, local fishing boats are sold in Haitou, Wang Zhe and Chengdong. In addition, it will be sold in Wei Yan Port from March to April. It is best to choose 20 capsules/kg, which is healthy and undamaged. It should be cleaned and transported in baskets. When releasing the seedlings, spread the seedlings evenly in the finished purse seine.
Third, management and feeding.
Physical and chemical indexes of seawater adapted to conch are as follows: salinity 10? -30? , pH 7,5-8,8, nitrite 0, 10ppm, transparency about 30cm. Within the above-mentioned physical and chemical indexes, conch grows faster when the water temperature is 10-35℃. Conch has a wide range of feeding habits. The feed is mainly small miscellaneous fish and low-priced shellfish. At the same time, pay attention to the diatom content in the water. Conch also filters diatoms, and the daily feeding amount depends on the water quality of the pond. If you lack diatoms, you should feed more, and vice versa. Check the feeding situation of conch every 2-3 days to prevent the sediment from deteriorating due to excessive feeding, pay attention to the change of pond water quality, prevent the sediment from turning black and causing pathological changes, use granular oxygen in time when climbing the pole, splash the bottom, regularly use EM to adjust the water quality, and keep the beneficial bacteria in the pond as the dominant population, thus promoting the growth of aquatic animals. The low-priced shellfish fed in the middle and late stage of conch culture are relatively large, so you can choose other places in the pond, and you can also feed some low-priced shellfish when stocking conch seedlings, so that you can catch them when necessary and feed them as feed. Because there are many shellfish in the bottom of polyculture pond, the daily filtered food intake is large, so we must pay attention to fertilizer and water in the breeding cycle. When using water for fertilization, we must choose big brand biological fertilizers and aquatic products from regular manufacturers to ensure the number of algae species and algae reproduction.
Fourth, increase production and income.
Conch farming is mainly in captivity, which occupies a small pond area and belongs to intensive farming. The number of seedlings per mu should be controlled at around 1 and 20,000 plants. After the Mid-Autumn Festival, the big ones can be caught intermittently and the small ones can be kept. Conchs that fail to meet the specifications in autumn harvest season should be temporarily raised in the ring ditch and can be used as seedlings or listed in advance in the following year. Conch culture is a subsidiary of polyculture pond, and it is also a condition to reduce the risk of polyculture pond. Although the growth environment of conch is not high, the growth rate is relatively fast in a comfortable environment, and other aquaculture varieties in the polyculture pond also need a comfortable growth environment. Therefore, it is necessary to master the change of water quality, keep the balance of bacteria and algae in the pond, control the change of sediment, clean the purse seine regularly and feed it properly to ensure the dissolved oxygen in the water. See a doctor in time to prevent cross infection.
Shape characteristics of conch
The edge contour of the snail shell is slightly square, large and thick, the shell is as high as 10 cm, the snail layer is 6, the mouth of the shell is apricot red, and there is a pearl-like sea. The maximum size is 18 cm, and the average size is 7 to 10 cm. Conch meat can be white to yellow due to variety differences. Conch shell is large and thick, grayish yellow or brown, with rough surface, neat and flat screw ribs, fine grooves, wide mouth and smooth red or grayish yellow inner surface. Mainly used for aquatic fishing, but also as handicrafts.
Living habits of conch
Conch is a kind of warm marine life, which mainly lives in the shallow sea with broken coral bottom and water depth of 1-30 meters.
Like other animals, mollusks such as conch have adapted to the ever-changing living environment. From rocks washed by seawater day and night to the dark and muddy deep seabed, all habitats have their own special mollusks. Tides affect the characteristics and distribution of mollusks growing on the seashore, and so do the geological surface characteristics on which they depend. However, the food provided by sufficient sunshine is more important. Molluscs are best suited to inhabit tropical areas, so the variety of shells in this area is amazing. Coral is the hometown of colorful conus, snails and snails; In mangroves, oysters live in the roots, jellyfish like to climb branches and attach leaves, and crabs let snails crawl quietly on the mudflats. Of course, temperate waters will also open the eyes of collectors. The beach is a safe haven for many bivalves and burrowing gastropods, such as emerald snails. In the estuary, the mixing of sediment creates a rich food environment, and a large number of bird-tailed clams can often be found. Rock bank is a good hunting ground for gastropods, which can firmly adhere to rocks.
Conch moves slowly and often feeds on algae and microorganisms. They generally inhabit shallow seas and are echinoderms. The outer lip of the shell is extremely abduction, and the female snail is obviously larger than the male snail. The meat is edible, and the shell is for viewing and can be used for carving. Night activities. Feet are located on the ventral surface of the body, thick and muscular, suitable for crawling. Carnivorous. They mainly feed on echinoderms. These mollusks usually live in shallow water or flat mud and can be found in deep water as deep as 600 feet (200 meters). Most conchs are caught by traps or trawls, and they may also be by-products of other products.
Nutritional value of conch
Medicinal value
Alias: porcelain snail, snail, sea nest, manatee.
Source: cleaned and dried shell of Rapana thomasiana Crosse, a snail family.
Sexual taste: sweet, cold.
Indications: acid-relieving, phlegm-resolving, hardness-softening and spasmolysis. Used for stomachache, acid regurgitation, lymph node tuberculosis and hand and foot contracture.
Usage and dosage: 1 ~ 3 yuan RMB, powder.
Edible
Nutritional analysis
Snail meat is rich in vitamin A, protein, iron, calcium and other nutrients, and has a dietotherapy effect on conjunctival congestion, jaundice, beriberi, hemorrhoids and other diseases.
The right crowd
The general population can eat it.
1, suitable for jaundice, edema, urinary tract obstruction, hemorrhoid and bloody stool, beriberi, thirst quenching, wind-heat and red eyes, and drunkenness; Suitable for patients with cancer and Sjogren's syndrome; It is also suitable for obesity, hyperlipidemia, coronary heart disease, arteriosclerosis and fatty liver.
2. People with spleen and stomach deficiency and diarrhea in loose stool are not suitable for eating; Because snails are afraid of cold, they should not eat during cold, women's menstrual period and postpartum, and those with stomach cold should not eat. Grams of food stage