Double bottom cultivating pool of breeding blue crab

Abstract

A double bottom cultivation pond for crabs of a green crab variety relates to a cultivation pond for seawater crabs, the technical problem to be solved is to keep the freshness of the cultivation environment in the stage of nutrition enrichment of various crabs. The technical scheme of the invention includes providing the cultivation pond and sea sand, the water level of the cultivation pond is 50 to 80cm and the water temperature thereof is 27 to 28 DEG C. The cultivation pond is characterized in that a layer of baffles is arranged at the height of 10cm above the bottom of the pond, through holes with the aperture of 3 to 5cm are distributed on the surface of the baffle, two layers of net are laid above the baffles, the lower layer of net is a rigid PVC net with the mesh of 20mm, the upper layer of net is a nylon sieve of 60 meshes/square inch, the sea sand with the grain diameter of 0.074 to 0.106mm and the layer thickness of 10 to 15cm is laid above the nylon sieve netting, the sea sand layer is flushed by sea water regularly, an inflation stone for inflation is arranged under the baffles at intervals of 2m<2>. The cultivation pond of the invention is applicable to the cultivation of the crabs of a green crab variety.

Description

Technical field: [0001] The invention relates to a seawater crab breeding facility, especially a cultivation pond. Background technique [0002] Because of the different species of crab and fish, the breeding facilities are also different, and there are also big differences between fish ponds and crab ponds. Blue crab species are usually cultivated with an area of ​​15m 2 ~20m 2 The cement pool is used as a cultivation pool. Two-thirds of the bottom of the pool is covered with sea sand with a particle size of 0.074 mm to 0.106 mm. The thickness of the sea sand layer is 10 cm to 15 cm. Crab nests are built on top of the sand and cultivated under shading conditions. Breeding crabs are selected from natural sea areas or breeding pools for brood crabs. Select healthy and lively female crabs with complete limbs, no trauma, no attachments on the body surface, individual weight of more than 300g, mature ovaries and full of crustaceans, and mated female crabs; The breeding crabs ...

AI Technical Summary

Problems solved by technology

[0003] At present, the main problems in the cultivation of conventional blue crab species are: due to the direct contact between the bottom of the pond and the sand layer, the oxygen exchange is insufficient, and it is difficult to replace the residual bait mixed in the sand layer and the eggs lost during spawning of parent crabs. The water path is completely discharged out of the pool. After the organic matter is rotten and fermented under high temperature conditions, it is easy to cause a large number of bacteria to multiply, resulting in blackening and corruption of the bottom sand layer, which affects the normal feeding and survival rate of the breeding crabs. After ~10 days, it gradually becomes serious. Therefore, in actual production, it is necessary to take out the breeding crabs every 20 days and replace all the sand layers. This will not only disturb the breeding crabs, but also time-consuming, laborious, and increase production costs.

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