River crab in-vitro hatching device and operation method thereof

Abstract

The invention discloses a river crab in-vitro hatching device and an operation method thereof. The device comprises an in-vitro hatching cylinder; a first filter cotton mounting groove is formed in the top end of the interior of the in-vitro hatching cylinder; a second filter cotton mounting groove is formed in the bottom end of the interior of the in-vitro hatching cylinder; filter plates are arranged in the middles of the first filter cotton mounting groove and the second filter cotton mounting groove; filter cotton is arranged at the top end of each filter plate; filter water holes are formed in the filter plates; the bottom end of the second filter cotton mounting groove penetrates through the in-vitro hatching cylinder and is provided with a water outlet pipe; and one end of the wateroutlet pipe communicates with the bottom of the filter box. According to the device, circulating water based seedling culture can be realized, so that the utilization rate of water resources is improved, and the waste of the water resources is reduced; fertilized egg hatching can be in a good environment with sufficient dissolved oxygen through multi-stage filtration, ultraviolet sterilization disinfection and aeration; antibiotics are not required to be added, so that antibiotic-free seedling culture is realized; and the water temperature can be controlled to increase the fertilized egg hatching speed, so that fertilized eggs of river crabs are hatched synchronously.

Description

technical field [0001] The invention relates to the technical field of in vitro hatching of river crabs, in particular to an in vitro hatching device for river crabs and an operating method thereof. Background technique [0002] Chinese mitten crab, commonly known as river crab and hairy crab, is an important special aquatic product in my country. River crab nursery is carried out in seawater, and the breeding cycle is long, usually taking 3-4 months. In the process of raising seedlings, there will always be some problems in water quality, nutrition, management, etc., which will cause a certain number of oviposit crabs to die or have incomplete steps, which will bring considerable economic losses to the enterprise. There is no nutrient input and output relationship between the fertilized eggs of river crabs and oviposit crabs. Oviposit crabs provide sufficient dissolved oxygen for the development of fertilized eggs by constantly inciting the navel and swinging appendages to...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the shortcomings in the above-mentioned existing production technology, the applicant provides an in vitro hatching device for river crab and its operation method, thereby effectively solving the problem that the existing in vitro hatching device for river crab cannot realize seedling cultivation in circulating water, which will make water resources Waste, and can't make fertilized eggs hatch in a good environment with sufficient dissolved oxygen, need to add antibiotics, and can't control the water temperature, can't make river crab fertilized eggs hatch simultaneously, which greatly improves the reliability of use

Images