The oriental wind snails of the species E. orientalis are referred to as the oriental wind snails, commonly known as snails, belonging to the gastropods, new gastropods, moths, and adults of the genus Aspergillus. In China, it is mainly distributed in the coastal areas of Fujian, Guangdong, Guangxi, and Hainan, which are located in the tropics and subtropics. It is a kind of high-quality shellfish that grows faster in individual species in China. Its delicious meat, rich nutrition, crispy and refreshing, is a new seafood delicacy at home and abroad in recent years.
As early as the year 2000, China began to carry out the artificial seedling research and trials of the Orientalis spirillii. Since then, Guangdong, Fujian and other provinces have also carried out research on the breeding technology of E. orientalis. In 2002, the project “Research on Artificial Breeding and Breeding of Eupatoria variabilis†carried out by Hainan Fisheries Research Institute was successful (this project won the third prize of scientific and technological progress in Hainan Province), and will be used to promote the development of E. orientalis in Hainan Province in the future. Aquaculture production provides a suitable scientific and technical basis.
In recent years, 40 seawater farms (including companies) in 6 coastal cities and counties, including Qionghai, Wenchang, Lingao, Quzhou, Dongfang and Chengmai, have successively carried out aquaculture production in Hainan Province. By 2005, At the end of May, the province's total stocking was more than 20,000 cubic meters, and the output was about 80 tons. The output value exceeded 10 million yuan, and it received good social and economic benefits. It has become a rich for fishermen and farmers in Hainan coastal areas. Another new highlight of aquaculture production.
Compared with other shellfish (spina) species, it has the following advantages:
First, the source of spiral seedlings is guaranteed.
Second, the ability of spiral seedlings to adapt to habitat is strong, crude and easy to grow. The suitable growth temperature of P. bungeana is 24°C-33°C, the specific gravity of seawater is 1.016-1.023, and the pH is 7.3-8.5 (April-October is the production season for the breeding of E. orientalis in Hainan Province each year). During the period of feeding, there was less incidence of spirochete, and the probability of successful breeding was high. The survival rate of culture was 80% to 90% and the highest was 95%.
The third is that the spirulina grows fast, the breeding cycle is short, and the yield is high. The stocking size is 0.8 centimeters to 1 centimeter, and the stocking densities are from 700 to 1,000 grains per square meter. After feeding for 6 months to 7 months, the snails can reach the specifications of 100 grains to 140 grains per kilogram. The general output is from 5 kg to 7 kg per square meter, and from high to 8 kg to 8.5 kg per square meter.
Fourth, low production costs, good economic returns, and a large proportion of input and output. The cost of producing each kilogram of snails is: 36 to 40 yuan for self-cultivation; approximately 60 to 70 yuan for the purchase of spiral seedlings (0.8 cm to 1 cm in size is 0.2 yuan per seed ), the feed coefficient is 4 to 6, the market sales price ranges from 120 yuan to 140 yuan per kilogram, the profit per square meter is about 80 yuan to 90 yuan, and the input-output ratio is 1:1.5 to 2.
Fifth, the production equipment is simple, the investment is small, the risk is small, the daily feeding and management technology is not difficult, and the operation is simple.
As early as the second half of 2005, the coastal cities and counties in Hainan province started an upsurge of aquaculture production. In view of the fact that shrimp production in Hainan Province has been slumped due to diseases and falling shrimp prices in recent years, the Oceanic and Fisheries Department of the province has vigorously promoted the development of aquaculture production of E. orientalis last year. Now, the province's total stocking water temperature has rapidly expanded to 60,000 cubic meters, with a total output of 302 tons and a total output value of nearly 40 million yuan.
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