Freshwater fish demersal egg incubation device and method

Abstract

The invention relates to a freshwater fish demersal egg incubation device and method. The freshwater fish demersal egg incubation device and method are suitable for incubation of fish demersal eggs or adhesive eggs processed in a debonding mode. The device comprises a container, wherein the bottom of the container is in a U shape, one side portion of a container inner cavity is provided with a water injection pipe facing the position below the corresponding side portion of the container, an opening above the other side portion of the container inner cavity is correspondingly provided with an arc turn portion, and the arc turn portion is turned towards one side of the water injection pipe from bottom to top so that injected water flow form annular flow. The method comprises the steps that debonded germ cells are slowly placed in the container filled with water and sink slowly; a water injection pipe valve is opened and is adjusted in a fine mode according to the proportion of the germ cells, the water flow is controlled so that the water flow can rotate in the perpendicular plane in the container to drive the germ cells to rotate, and dead cells and light impurities are removed under the action of centrifugal force; the water flow is kept being injected, and a net bag is cleared when fries are about to be incubated; the fries are collected after being incubated. According to the freshwater fish demersal egg incubation device and method, the germ cells can be prevented from being accumulated on local parts, the dead cells and egg shells are separated from other impurities, and an incubation effect is good.

Description

technical field [0001] The invention relates to a freshwater fish sinking egg hatching device and a hatching method, which are suitable for hatching freshwater fish sinking eggs or viscous eggs after debonding treatment. Background technique [0002] my country is a large traditional aquaculture country, and there is a large demand for fry every year, and the workload of artificial hatching is relatively large. For a long time, China's fry hatching has been using traditional equipment, such as hatching buckets, hatching tanks, and hatching rings, etc., mainly relying on the impact of bottom water flow to roll the fertilized eggs upwards, which can not only increase dissolved oxygen, but also prevent the accumulation of fertilized eggs and lack of oxygen The purpose of necrosis can basically meet the needs of production, but the above-mentioned hatching equipment also has many shortcomings, such as supporting water pumps, water towers and other auxiliary equipment during cons...

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Problems solved by technology

For a long time, my country's fry hatching has been using traditional equipment, such as hatching buckets, hatching tanks, and hatching rings, etc., mainly relying on the impact of bottom water flow to roll the fertilized eggs upwards, which can not only increase dissolved oxygen, but also prevent the accumulation of fertilized eggs and lack of oxygen The purpose of necrosis can basically meet the needs of production, but the above-mentioned hatching equipment also has many shortcomings, such as supporting water pumps, water towers and other auxiliary equipment during construction, occupying a large amount of land, investing a lot of capital, and requiring a lot of replacement during the hatching process. Water is easily affected by water source pollution, and manual cleaning of the filter screen is required. The workload is heavy, and if there is a little carelessness, the water in the incubator is easy to overflow, resulting in or loss of fish eggs. The water flow regulation management and fry hatching observation during the entire hatching process are comparatively difficult. please wait

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