A marine crustacean breeding steel structure cage and three-dimensional breeding system

Abstract

Disclosed are a marine shellfish aquaculture net cage with a steel structure and a three-dimensional aquaculture system. The marine shellfish aquaculture net cage (1) with a steel structure comprises a steel frame (11), a netting system, a ballast water tank system (14), steel grooves (16) etc., wherein the steel grooves (16) are fixed at the upper and lower ends of an inner steel frame, nettings (12) on the top surface and the bottom surface thereof are made by weaving meshes and ribs and edges thereof are respectively fixed in the corresponding steel grooves (16), side nettings (13) are steel nettings and welded to the inner steel frame, and the ballast water tank system (14) is arranged between an outer steel frame and the inner steel frame. A (circular) net cage (2) of high-density polyethylene is moored to the marine shellfish aquaculture net cage (1) with a steel structure via a mooring rope, so as to constitute the three-dimensional aquaculture system. Nettings of the (circular) net cage (2) of high-density polyethylene maintain their shape by means of connection with the marine shellfish aquaculture net cage (1) with a steel structure via ropes (4). Such a three-dimensional aquaculture system can provide an excellent growing environment for marine shellfish to achieve the purpose of fish farming in the upper part and shrimp (crab and mussel) farming in the lower part.

Description

【Technical field】 [0001] The invention relates to a net cage in the field of marine culture, in particular to a steel structure net cage for marine crustacean culture and a three-dimensional culture system. 【Background technique】 [0002] At present, people's living standards continue to improve, and more and more seafood with delicious meat and rich nutrition appears on the dining table. Many marine crustaceans are edible and have high nutritional value, such as shrimp, shellfish and crabs, which are popular with consumers and have a broad market. However, its output accounts for a small proportion in marine fisheries, and most of the crustacean seafood is obtained through marine fishing, and the scale of artificial breeding is small or the current artificial breeding method is contrary to sustainable development. [0003] Taking shrimp farming as an example, my country's shrimp farming still relies entirely on the traditional pond and shrimp pond farming models. Vietnam a...

AI Technical Summary

Problems solved by technology

The disadvantages of cultivating prawns in ponds or shrimp ponds are: the water quality of the ponds is difficult to control; the construction of ponds or shrimp ponds destroys a large amount of farmland and mangroves; the extensive use of drugs makes the growth environment of shrimp seedlings poor, resulting in poor shrimp quality and serious pollution.

Although this kind of net cage is equipped with a sand tray at the bottom, which can provide shelter and habitat for prawns to a certain extent, it is only suitable for waters such as lakes, shallow seas and bays.

For the open sea area with greater wind and waves, this type of net cage floating on the sea moves with the waves and currents, and the sand in the sand tray is easy to leak out; at the same time, the deformation of the net cage squeezes the living space of the prawns, and the nets cause damage to the prawns. , which will reduce the survival rate of prawns

[0005] In addition, the gravity-type high-density polyethylene cages currently used also have certain defects.

Gravity-type high-density polyethylene cages rely on the counterweight system suspended at the bottom of the net to reduce the deformation of the net under the action of ocean currents, but this makes it more difficult to replace the net; if the counterweight is light, it is relatively easy to replace the net , but the deformation of the cage is large, the breeding volume is greatly reduced, and the economic benefit is reduced

At the same time, the gravity-type high-density polyethylene cages rely on the mooring system to be moored in the breeding sea area. When facing a typhoon, the mooring system is prone to anchoring, causing the cages to be blown away or even overturned. Loss and destruction of fish ecology

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