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Artificial culture of snails and analysis of market prospects
The name of the flower snail is Fangbandong Fengluo, which is also known as small wind snail, sea snail, Dongfeng snail. It has a deep thread, a long oval shell, a smooth shell surface, a slightly thin shell, shell surface is light brown shell skin, shell skin mixed with white, dotted or rectangular purple brown or red brown patches. The general shell is about 70 mm high and the shell is about 40 mm wide. Usually likes to inhabit in clear, rocky or sandy harbor areas, some of which inhabit in the sea floor of several meters or dozens of meters in depth, mainly distributed in Daya Bay, Guangdong, and coastal areas of western Guangdong. The snails are broad-brimmed benthic gastropods, and the diets are mainly animal flesh or algae and debris. For food feeding, it is a kind of high-quality economic marine shellfish. Its meat is tender and delicious, tender and crisp, and nutritious. Have a higher food value and economic value. In recent years, due to increased fishing, natural resources have been gradually reduced, production is limited, and market prices are low. The price of snails on the Guangzhou market has increased from 96-110 yuan per kg in 2002 to the recent 116-120 yuan. The vast number of hotels and restaurants are in short supply, especially Hong Kong, Macao and Taiwan. And can be sold to Japan, South Korea. At present, domestic farming has not yet been carried out on a large scale, and there have been a few scientific research units and seedling farms in the western part of the country to carry out artificial breeding and breeding. Now we will introduce the technology and investment benefits of spiral fishing as follows. The habitat habits of snails are suitable for the growth of sandy or sandy mudstones and stone seams. Its survival temperature is 3 °C -38 °C, the optimum growth temperature 25 °C -33 °C, the proportion of seawater 1.015-1.023. The stability of salinity is better, the dissolved oxygen requirement is greater than 3 mg/l, and the pH range is 7-9, with 7.5-8.5 being the best. Most of the food is animal-based, and it is rot-eating or carnivorous. It is better to eat fresh fish. Usually lurking in the surface layer of sand and mud, when smelling the smell of food, that is, crawling out of the sand to scrape the food with tongue teeth in the water pipe, the food is larger and grows faster. The snail breeding technology snails can be cultured in ponds or on shoal purse seine. l. Pond culture Based on the habitat habits of the snails, the ponds are made slope type and the bottom of the pond is sandy. If the mud bottom is to be sanded 5-10 cm, the sea water quality should be clear. The turbid water should be filtered and put into the pond for breeding. Stocking densities were: coarse-grained 80-100 grains/m2, intensive intensive pool 160-200 grains/m2, and 0.5-1 cm young snails. After stocking, the water quality should be kept relatively stable, mainly because the transparency and salinity of the water cannot change much. Feeds are fed with fresh fish or fish paste every morning and evening, and special shellfish compound feeds are also available. The amount of feed is generally 3%-5% of the weight of the snails. If the quality of water and fertilizer is dark, then less investment will be made. If the water is lean, more investment will be made, and the amount of feeding will be controlled flexibly to avoid causing pollution to the beach. Snails are fast-moving, have a large range, and should be fed and fed as far as possible, so as to prevent the flocks from ingesting food and lack of oxygen. The depth of fish farms should generally be about 60-100 cm, and they can also be polycultured with shrimps, fish, and other shellfish. If intensive culture should have aeration systems or microfluidic aquaculture, keep the water fresh. A nursery pond with a cement structure was selected and sanded 3–5 cm through the bottom, which can also be used for snail breeding. Snails are farmed artificially at room temperature. After 3 months of cultivation, you will be able to catch up and stay small and gradually arrange for listing. The general market specifications can reach 120-160 grains/kg, and can also be raised to 20-40/kg. Specific listing according to market size and size requirements. Conch farming usually can be reared for one year. The breeding period is from early May to late July, early August to late October. The year of breeding can be harvested, and the survival rate can reach 95% or more. 2. The purse seine culture requires that the water quality of the mudflats is fresh, the wind and waves are small, and the sandy bottom is cultured with a mesh fence. The net should be more than 0.5 meters above the tide level, and the mesh should be selected according to the individual size of the snail. Because the snail crawls quickly, it is easy to climb over the net and escape, so it should have a certain height of the fence. After the fence is completed, dug trenches shall be made on the painted surface to remove predator organisms, and “clean ponds net†or high concentrations of “bleaching powder†and “lime lime†may be used. Farming, generally about 50-100 grains per square meter, usually managed to check the escape, repair network, cleaning, daily feeding fresh fish, shrimp and so on. The disinfected surface is generally disinfected once a week or a half month. It can be disinfected with “bromochloroheine†or “dibromohydantoin†to prevent bacterial infection. During the later period of culture, attention should be paid to the growth of the snails, and attention should be paid to changes in the bottom coat quality, air temperature conditions, and wind direction to prevent the collective escape of the snails, especially during the typhoon season, and pay attention to the reinforcement of the fence columns. When there is excessive silt or dirt on the beach, it should be promptly cleared to prevent loss caused by pollution. In particular, breeding season should pay more attention to disease prevention. Harvesting can also be harvested to stay small, or all harvested and harvested for sale. According to the analysis of the culture condition of the snails, the feed coefficient is 5, and the production cost is within 40 yuan per kilogram of the spiral seedlings, feed, hydropower, labor costs, and purse seine costs, while the current market price is stable at 60-120 yuan per kilogram. Generally, the yield of intensive culture ponds is 450-800 kg, and the cultivation specifications are generally 30-40 grains/kg and 10-15 grains/kg. The cultivation specifications are determined according to the needs of the local market. The larger flowers are currently on the market. The price of snails is relatively high, while Fujian and Guangdong require more small snails. The average mu input is 1.5-2 million yuan, the per mu output value is 3-48 thousand yuan, the mu profit is 1.5-2.8 million yuan, so the aquaculture benefit is very considerable. In view of the fact that spiral culture has not entered the peak period and the market is still in short supply, prices in recent years should be relatively stable, and snails have a short growing period, fast turnover and strong adaptability. With high economic efficiency, it is worth to develop and promote farming.