Ecological raising method for sea cucumber seedlings by using net cage under the sea

Abstract

The invention provides an ecological temporary raising method for sea cucumber seedlings 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 frame-type 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 seedling temporary 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, due to a certain buoyancy force of the rod-shaped bodies such as the bamboo rods or the sealed plastic pipes in the sea, a certain distance between the frame-type net cage and the seafloor can be basically maintained in the temporary raising process, the net cage can be effectively prevented from being caught in silt, and the netting is prevented from being broken due to friction of undersea silt. The ecological temporary raising method for the sea cucumber seedlings by using the net cage under the sea has the advantages that the cost of the net cage is lowered, and the tides and the space of the net cage can be used reasonably.

Description

technical field [0001] The invention relates to fishery sea cucumber cultivation, which uses the body of the floating raft and a net cage to cultivate sea cucumber seedlings on the seabed. technical background [0002] At present, a new technology of ecological cultivation of sea cucumber seedlings in net cages is booming in Changhai County, Liaoning Province, and a new technology of ecological temporary cultivation of sea cucumber seedlings in seabed net cages has also emerged as the times require. The technical principle is to use the tide to change the direction and size of movement twice a day laws of nature. The impact of the tide on the net cage makes it reciprocate in two horizontal directions every day on the seabed, enabling the sea cucumber seedlings to obtain a large area of ​​various marine organisms, shell fragments, and excrement of cultured shellfish deposited on the seabed. Damaged objects, which are the nutrients needed by sea cucumbers. The reciprocating ...

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 rubs against obstacles such as sediment and shells for a long time 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 cucumber seedlings to obtain nutrients is reduced, and on the other hand, the cages are easily trapped by sediment

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