Method for selecting and identifying paddlefish fertilized egg and dedicated egg pipette thereof

Abstract

The invention belongs to the technical field of artificial fish breeding, particularly relates to a technical method for selecting and identifying paddlefish fertilized egg by using an egg pipette and a dedicated egg pipette thereof. The method for selecting and identifying the paddlefish fertilized egg comprises the following steps: 1) selecting the fertilized egg from the paddlefish embryonic development to the nerviduct closing stage by using a straight pipe glass egg pipette; 2) rejecting abnormal developmental bad eggs; and 3) putting normal developmental fertilized eggs in a hatcher to hatch fish fry. The dedicated egg pipette is the straight pipe glass egg pipette, comprises a rubber bulb and a glass pipe, the diameter of the rubber bulb is 4-5cm, the glass pipe is round, the length of the glass pipe is 30cm, the inner diameter thereof is 0.5cm, and the mouth of the glass pipe is a plain end. The method and the device of the invention have simple operation, low production cost and good application prospect in artificial propagation of the paddlefish.

Description

technical field [0001] The invention belongs to fish artificial reproduction technology, and in particular relates to a method for selecting and identifying fertilized eggs of spoonbill sturgeon and a special egg-absorbing tube. Background technique [0002] my country is rich in inland water resources, with a total area of ​​17,025,300 hectares, including 1,921,600 hectares of ponds, 7,524,300 hectares of lakes, 2,301,600 hectares of reservoirs, and 5,277,800 hectares of rivers. However, the fish stocked in various water bodies is relatively single, not only the three-dimensional space of the water body and bait resources have not been rationally utilized, but also the fish quality and breeding benefits are relatively low. Therefore, increasing the stocking of high-quality new species in inland waters is crucial to adjusting the stocking structure of lakes, reservoirs and ponds in my country and improving the economic benefits of stocking. [0003] Spoon-nose sturgeon is a...

AI Technical Summary

Problems solved by technology

Spoon-nose sturgeon was introduced to China from the United States in 1990. Since then, China has to purchase a large number of fertilized eggs from the United States every year, which not only consumes a lot of manpower and foreign exchange, but also cannot guarantee the quality of the fertilized eggs.

At present, the main problem existing in the artificial propagation of domestic sturgeon is that fertilized eggs and unfertilized eggs are not easy to separate, and a large number of saprolegnias are parasitized on unfertilized eggs in the closed stage of embryonic development, which seriously affects the normal development of fertilized eggs, resulting in The hatching rate of fertilized eggs normally developed by the spoon-nose sturgeon is low, and the number of hatchlings is small, and the fry and fingerlings are far from meeting the needs of production.

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