Method for debonding sticky fertilized eggs of marine fishes

Abstract

Aiming at the adverse effect of sticky fertilized eggs on artificial propagation and scientific research, the invention provides a method for debonding sticky fertilized eggs of marine fishes. According to the method, a tannic acid seawater solution with a specific concentration is used for debonding the sticky fertilized eggs, the method comprises the steps of debonding solution preparation, inflating embathe, washing, counting and the like, and finally, the debonded fertilized eggs are artificially hatched, so that the hatchability is remarkably improved. The method is good in debonding effect, the debonding of fertilized eggs is uniform and thorough, damage to the fertilized eggs is reduced to the maximum extent, the hatching rate of the sticky fertilized eggs of artificially cultured marine fishes is increased, and the technological method is simple and high in debonding speed.

Description

technical field [0001] The invention relates to the technical field of aquaculture, in particular to a method for fertilizing and hatching seawater fish that lay sticky eggs. Background technique [0002] Sticky eggs refer to fish eggs with mucus or sticky filaments on the surface of the egg membrane. It is mainly found in freshwater carps, migratory salmon and trout, and marine fishes such as pufferiformes. These eggs often adhere to aquatic plants, seaweeds or ocean reefs after laying. These sticky eggs are suitable for artificial breeding and Relevant studies have brought adverse effects, mainly as follows: [0003] 1) Surface mucus makes sticky eggs translucent or opaque, and their embryonic development cannot be observed through a microscope. In scientific research work, the phylogeny of these fish cannot be studied, and the hatching time cannot be grasped in time in production, which in turn causes breeding. confusion in work schedules; [0004] 2) Sticky eggs are e...

AI Technical Summary

Problems solved by technology

[0003] 1) Surface mucus makes sticky eggs translucent or opaque, and their embryonic development cannot be observed through a microscope. In scientific research work, the phylogeny of these fish cannot be studied, and the hatching time cannot be grasped in time in production, which in turn causes breeding. confusion in work schedules;

[0004] 2) Sticky eggs are easy to agglomerate during the hatching process, resulting in the death of fertilized eggs due to hypoxia, which brings economic losses to seedling production

The interspecies difference of fertilized eggs and the difference in the chemical environment of seawater make the debonding method of the mud water or talcum powder solution unable to be popularized, and blind promotion will bring disadvantages such as uneven debonding, incompleteness, and low hatching rate, and cumbersome operation

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