At present, there are two ways of oyster culture: full artificial seedling raising and semi-artificial seedling collection.

The operation process of full artificial seedling cultivation includes: temporary rearing and ripening of parent shellfish, egg collection, hatching and selection, feeding and larval cultivation, production, treatment and attachment, and larval rearing. The operation process of semi-artificial seedling collection includes: selection of seedling collection field, examination of gonad development of parent shellfish, collection and investigation of planktonic larvae, production, treatment and release of attachment base.

(2) Breeding methods

1. raft culture

Choose the sea area with stable tidal current, rich bait, calm wind and waves and above water depth as the oyster raft breeding ground. Oysters near the river should be selected near the estuary with low salinity; Oysters in Dalian Bay should be selected in high salinity waters far from the estuary. There are two main ways of development:

1. Hanging rope culture: It is suitable for oysters with shells as a fixed base. There are two kinds of culture methods: one is to connect the shells with ropes in series, separate them with bamboo tubes in the middle, and hang them on a raft frame.

(2) Cage culture: cage culture in scallop net. Put the anchorless oyster fry or the oyster fry fixed on the shell together with the shell into the scallop cage and hang it on the floating raft. Generally, oyster seedlings in raft culture are per mu 1 00000, and shells are used as seedling pickers, which can hang about shells per mu100000.

Second, the beach sowing and breeding

(1) site selection: the inner bay with small waves, gentle tidal current and no pollution should be selected for mudflat sowing and breeding, and sandy mudflat or mudflat is suitable as the bottom material. The intertidal zone should be selected in the lower part of the middle tidal zone and near the low tidal zone.

Second, the sowing method:

Sowing at low tide: sowing manna on the beach after low tide. Before sowing seedlings, the beach surface should be leveled, or a bed-like foundation should be built before sowing seedlings. Dry-tide sowing seedlings should try to master the rising tide after sowing seedlings, so as to shorten the exposure time of oyster seedlings to the air and avoid sowing seedlings in the sun at noon.

Seeding seedlings by water: Seeding seedlings by boat after high tide. Before sowing seedlings, cut the beach into strips and insert bamboo poles, wooden poles, etc. As a sign, and after the high tide, the oyster seedlings were scattered on the boat with a shovel. Because the distribution of oyster seedlings cannot be directly observed, the seedlings sown with water are often uneven. According to the beach quality, the planting density should be appropriate.

Thirdly, mixed culture of oysters and shrimps.

Clear, site layout: before stocking oyster seedlings, thoroughly dredge them, and use bulldozers and other tools to flatten and compact the bottom of the pond where oyster seedlings are sown, so that it is slightly convex and slightly higher than the surrounding bottom surface to prevent oyster seedlings from sinking.

Fourth, throwing stones to engage in aquaculture.

Stones used as oyster seedling pickers have now become oyster breeding equipment. Shells with short growth period can be cultivated in situ in seedling collection field; Oysters near the long-growing river will be moved to farms for breeding. The main cultivation methods are starry sky, plum blossom and determinant.

5. Bamboo cultivation

The collected oyster seedlings were sparsely planted in situ by the method of inserting bamboo and picking seedlings. When cultivated, oyster bamboos can be arranged in two ways:

7. Lishi culture

After the seedlings are collected by standing stone method in the mid-tidal area, as long as the amount of seedlings is appropriate, they can grow naturally without any management until harvest. This method is mainly used for breeding pleated oysters.