How to catch natural mud screw seedlings?

In the coastal area of ​​Zhejiang Province, the eggs of the snails are seen on the mudflats from March to November. However, drastic changes in ocean hydrology, weather, etc. have a greater impact on the embryonic development of the eggs of the snails. Therefore, it is necessary to collect the seedlings before harvesting. Conduct seedling exploration to identify the densely populated area of ​​Beiyou in order to organize human resources for centralized harvesting. When the tide has receded, seedlings can be used to scrape onto the mudflats where natural seedlings have been raised and scraped into the mesh bags to allow the mud to leak from the mesh bags. When 1/3 of the bag is scraped, the net bag can be taken into the gutter for washing, then the seedling mud in the bag is poured into the sieve together, and the sand, crushed shell and other impurities are sieved and classified. The commonly collected mite seedlings range from several thousand to tens of thousands of kilograms per kilogram, while the young snails are suitable for 50,000 grains per kilogram. When the length of the young shell reaches 5 mm or more, the beach can be caught directly by hand.
In the area of ​​Yueqing and Yuhuan in the southern sea area of ​​Zhejiang Province, the season of collecting muddy spores is from January to March; in Zhoushan, Ninghai and Cixi in the central and northern sea areas of Zhejiang, the seedling collection season is concentrated in 2-3 months.

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