A method for ecological regulation of seawater cages using polyculture of wild Chinese single-horned pufferfish

Abstract

The invention discloses a method for adjusting seawater net cage water body ecology through poly-culture of wild China Monacanthus chinensis. The method comprises steps that wild China Monacanthus chinensis and seawater main bred fish types are poly-cultured; casting density of the wild China Monacanthus chinensis is 5 to 10 fishes / m<3>; and coverage of v on the poly-culturing net cage during the cast is 10 to 20%. Wild China Monacanthus chinensis and seawater main bred fish types are poly-cultured and the two types have no food competition relationship; the wild China Monacanthus chinensis has no effect on normal growth of the seawater bred fish types and can also absorb alga attached to the net cloth during the cultivation of the net cage and residual baits or faeces of each day; net cage water quality decrease due to the alga, the residual baits and the faeces can be reduced, so healthy development of the seawater net cage ecological system can be stably and effectively maintained; and culture production can be normally conducted.

Description

technical field [0001] The invention relates to the field of ecological regulation of seawater net cages, in particular to a method for using polyculture of wild Chinese single-horned fish to regulate the ecology of seawater net cages. Background technique [0002] Seawater cage fish farming is an important farming model. Inside the cage is a small ecosystem. To maintain the stability of this small ecosystem is of great significance to the growth and survival of farmed fish. In the process of fish breeding, due to the residual bait and fish feces will fall to the nets, fall to the bottom of the sea through the meshes or be taken away by the flow of sea water, but as time goes on, the nutrients in the water body increase, and the cage nets A large amount of algae will grow epiphytically, and these algae will make the mesh of the net clothing smaller and smaller, and the residual bait and feces cannot flow out of the cage through water flow or gravity, and accumulate and deter...

AI Technical Summary

Problems solved by technology

However, replacing and cleaning the net clothes requires a lot of work for the farmers. Moreover, every time the fish is replaced and cleaned, many fishes will be injured due to movement and friction. After the injury, they are very easy to be infected with diseases. The net cage is an open system, and it is very easy to Difficult to treat with medication

There will also be a certain degree of loss in production

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