Layered demersal breeding net cage

Abstract

The invention relates to a layered demersal breeding net cage which comprises a cage body. The cage body comprises a water inlet net sheet, a middle net sheet, a water outlet net sheet, two net cage side walls and a net cage bottom surface. The net cage bottom surface comprises two inclined surfaces. An isolating grid or a cage sheet is arranged above the net cage bottom surface. The space on theisolating grid or the cage sheet is a fish living area. A dirt collecting area is formed between the isolating grid or the cage sheet and the net cage bottom surface. At least one horizontal microporous aerating pipe is mounted on the side wall of each net cage in the water inlet-outlet direction. A drainage pipe is fixedly connected to the outer side of the water outlet net sheet. At least one dirt collecting groove in connection and communication with the drainage pipe is formed at the connection of the two inclined surfaces. The layered demersal breeding net cage integrates various functions such as flow plugging, inner circular river diversion, oxygenation, drainage and the like in the net cage design. By isolating the living area from the dirt collecting area, the three-dimensional space of the water body of the net cage is utilized fully, so that the living micro-environment of fishes is improved and the breeding density is improved.

Description

technical field [0001] The invention relates to a layered benthic culture net cage, in particular to an aquaculture net cage suitable for high-density intensive culture of most fish, and belongs to the technical field of aquaculture and fishery equipment. Background technique [0002] Due to the large production of bulk freshwater fish farming in my country, decentralized management of farming, low yield per unit of farming, low efficiency of land use, and serious environmental pollution, there is an urgent need for scientific and advanced farming technology and facilities to improve unit yield and fishery (especially freshwater aquaculture) production operations efficiency. Circulating water in the pond and ordinary running water culture increase the exchange rate of the water body, provide sufficient oxygen, good water quality and remove fish metabolites in a timely manner, and collect sewage and sewage from residual bait, feces and other solid particulate organic matter, a...

AI Technical Summary

Problems solved by technology

The oxygen concentration around the fish body is much lower than the oxygen concentration of the cage water, which leads to a serious waste of dissolved oxygen in the water body and an increase in the amount of circulating water exchange; moreover, the stagnant area of ​​the water flow next to the farmed fish has a large range, and the utilization of dissolved oxygen and and poor metabolism

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