Australian freshwater crayfish circulating-water egg-holding hatching system and young crayfish breeding method

Abstract

The invention discloses an Australian freshwater crayfish circulating-water egg-holding hatching system and a young crayfish breeding method. The system comprises a heat-preservation greenhouse, a water storage tank, a sedimentation tank, a mechanical filtering device, a constant-temperature device, an ultraviolet sterilization device, a biological filter device and an ecology-simulated artificialstream; all the components are arranged in the heat-preservation greenhouse; the sedimentation tank and the mechanical filtering device are respectively provided with sewage discharging pipes; a meshscreen is arranged on the water surface of the sedimentation tank, and most of the lower part of the mesh sieve is immersed under the water surface; the ecology-simulated artificial stream is a plurality of water channels, and mesh screens are suspended at a certain distance in each water channel; parent crayfish culture boxes and gravel are placed into the bottoms of the water grooves, and watergrass is planted among the gravel. According to the system provided by the invention, water quality change can be guaranteed to be stable, and the stress reaction of the parent crayfish and juvenilecrayfish in a breeding stage can be effectively avoided, so that the egg-holding hatching rate is further improved. The culture boxes immersed in the ecology-simulated artificial stream are used for independently breeding parent crayfish, so that the parent crayfish can be effectively prevented from being attacked or interfered by other crayfish, and a good condition is created for improving the egg-holding hatching rate.

Description

technical field [0001] The invention belongs to the field of aquaculture, and in particular relates to an egg hatching system and a seedling raising method for Australian freshwater lobsters in circulating water. Background technique [0002] Australian freshwater lobster, also known as red crayfish, is one of the excellent freshwater shrimps. The shrimp has the following outstanding advantages: [0003] 1. Strong adaptability, can live in pure fresh water or fresh water with certain salinity. [0004] 2. It has a wide appetite and can eat pumpkin, eggs, aquatic plants, ordinary shrimp feed, fly maggots, animal offal, etc. [0005] 3. The breeding cycle is short and the growth rate is fast. The net weight gain of Australian freshwater lobsters in one month is comparable to the net weight gain of crayfish in four months, and the weight of Australian freshwater lobsters that have been cultured for one year can reach more than 0.7 kg. [0006] 4. It can reproduce and hatch n...

AI Technical Summary

Problems solved by technology

[0015] In order to solve the above-mentioned series of problems of Australian freshwater lobster culture, the object of the present invention is to provide an Australian freshwater lobster recirculating water brood hatching system and a seedling raising method, which mainly solve broodstock selection, broodstock cultivation, water quality treatment during broodstock stage, reduction of seedling self-mutilation rate, Seedlings and other issues, to improve the egg hatching rate and seedling survival rate of Australian freshwater lobster as a whole

Images