Device suitable for breeding juvenile river crabs

Abstract

The invention discloses a device suitable for breeding juvenile river crabs. The device comprises a breeding barrel, wherein the middle of the bottom of the breeding barrel is sunken downwards to form a dirt collecting tank, a mesh water suction pipe is upwards arranged at the bottom of the dirt collecting tank, the mesh water suction pipe communicates with a connecting pipe, the free end of the connecting pipe is rotationally connected with a blow-off pipe, the mesh water suction pipe is sleeved with a siphon sleeve, and a plurality of drainage openings are formed in the bottom of the siphon sleeve; an aeration disc is arranged at the bottom of the breeding barrel, an opening is formed in the middle of the aeration disc, a plurality of air outlets are formed in the upper end of the aeration disc, the openings of the air outlets are in the same direction, mounting cavities communicating with the air outlets are formed in the aeration disc, an aeration pipe is arranged in each mounting cavity, and the aeration pipes communicate with an oxygenation pump; and a strip-shaped isolation net frame is vertically arranged on the inner wall of the breeding barrel, and an electric heating pipe is arranged in the strip-shaped isolation net frame. In the river crab breeding process, residual feed and excrement in a water body can be gradually concentrated in the center of the bottom through vortex, concentrated pollution discharge is facilitated, pollution discharge is convenient, and the effect is good.

Description

technical field [0001] The invention relates to the technical field of aquaculture, in particular to a device suitable for raising river crab seedlings. Background technique [0002] River crab larvae develop and grow through several significant metamorphosis. The growth and morphological changes of the larvae occur after each molt. The whole larval stage is divided into three stages: zoan larvae, megalopa and juvenile crab stage. The zodiaces are divided into 5 stages, and after the 5th stage zoea moults, they will metamorphose into megalopa (crab seedlings). The feeding habits of daphnia larvae are generally unicellular algae, rotifers, egg yolk, artemia larvae, soybean milk, tofu, etc., and there is a phenomenon that the big ones eat the small ones and kill each other. During the breeding process of river crab larvae, a large amount of residual bait and feces will be produced. In the process of artificial intensive breeding, if the residual bait and feces are not disch...

AI Technical Summary

Problems solved by technology

During the breeding process of river crab larvae, a large amount of residual bait and feces will be produced. In the process of artificial intensive breeding, if the residual bait and feces are not discharged in time, the water quality will gradually deteriorate, resulting in frequent occurrence of subsequent river crab breeding diseases.

Therefore, it is a very important task to clean up the residual bait and feces in the breeding pond, but in the breeding pond, the residual bait and feces all randomly settle to the bottom of the pond, making it difficult to discharge sewage

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