Raising method for sea cucumber by using net cage under the sea

Abstract

The invention provides a raising method for a sea cucumber by using a net cage under the sea. A net cage frame is composed of an annular net cage support plate and rod-shaped bodies such as bamboo rods or sealed plastic pipes, the outer ring of the net cage frame is sewed with cylindrical netting, and the net cage frame with two open ends is formed. A base curtain is hung in a net cage inner chamber, two ends of the frame-type net cage are tightened by using connecting ropes and are connected with a raft body, a sandbag is arranged on the raft body, and a sea cucumber raising device under the sea is formed. By means of the device, impact force of tides on the frame-type net cage can be effectively used, horizontal reciprocating motions in two directions under the sea can be achieved every day, various kinds of nutritive materials under the sea can be acquired by the sea cucumber in a large-area mode, the frame-type net cage can be effectively prevented from being caught in silt, a certain distance between the outer ring of a net cage support plate and the netting is formed, and the netting is prevented from being broken due to friction of the undersea silt.

Description

technical field [0001] The invention relates to fishery sea cucumber culture and biological control, uses the raft body of the floating raft and a net cage to cultivate sea cucumbers on the seabed, and achieves the purpose of biological control by licking sea cucumbers on the seabed pollution. technical background [0002] In Changhai County, Liaoning Province, one of the largest shellfish breeding bases in China, large-scale and high-density shellfish floating raft net cage farming has been used for many years, producing hundreds of thousands of tons of pollution every year. These foulings are deposited on the seabed year after year to form a thick fouling layer, polluting the aquaculture sea area for a long time. [0003] At present, a new technology of sea cucumber ecological seedling cultivation in net cages is booming in Changhai County, Liaoning Province. The new technology of ecological temporary cultivation of sea cucumber seedlings and sea cucumber cultivation in su...

AI Technical Summary

Problems solved by technology

The attachment base is always piled up on the arc-shaped bottom of the cage, and more than two-thirds of the space above the attachment base cannot be effectively utilized

Since the cage partitions are disc-shaped, the partitions are not connected to each other, so it is impossible to wear the attachment base in strings and hang it in the seawater like the cage seedlings.

[0005] 2. The net cage is easily damaged when it is directly in contact with the sediment on the seabed, causing sea cucumbers to escape

[0006] 3. The connection between the cage and the raft body is unreasonable

One end of the mesh cage is connected to the raft body, so that the axial direction of the mesh cage is along the direction of the tidal current, and the effective force-bearing area of ​​the mesh cage itself to accept the impact force of the tidal current is small, especially in the time period when the tidal current becomes smaller in the dead flood season, it is difficult for the mesh cage to realize Horizontal reciprocating motion of the seabed

On the one hand, the scope for sea cucumbers to obtain nutrients is reduced, and on the other hand, the cages are easily trapped by sediment

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