Artificial propagation method for coreius guichenoti

Abstract

The invention discloses an artificial propagation method for coreius guichenoti. The method includes the steps of 1, selection of parent fishes, wherein parent fishes the gonads of which are high in development maturity are selected to serve as spawning acceleration parent fishes according to external features of the parent fishes of coreius guichenoti and the eggs dug out by an egg digging device; 2, preparation and injection of spawning acceleration drugs, wherein according to the weight of the fish bodies, normal saline is adopted for preparing the spawning acceleration drugs such as lutropin releasing hormone A3, gonadotropin of fish pituitary glands and chorionic gonadotropin, a two-time injection method is adopted for injection, the water temperature is 20.5-22 DEG C, and the needlepitch is 8-10 h; 3, artificial propagation acceleration and insemination, wherein the parent fishes are checked at irregular time after injection of the spawning acceleration drugs, artificial insemination is carried out once the phenomena of ovulation and spermiation occur, and a wet insemination method is adopted as the insemination method; 4, hatching, wherein the obtained fertilized eggs are poured into a conical hatching device for hatching, and after fry get out of membranes, the fry are moved into a fry cultivation box for fry cultivation. The operation is simple, the artificial propagation rate and the survival rate of the fry are effectively increased to 85% or above, and a solid base is laid for propagation, releasing and protection of coreius guichenoti group sources.

Description

technical field [0001] The invention belongs to the field of aquaculture, and more specifically relates to an artificial propagation method of copperfish, which includes broodstock selection, preparation and injection of oxytocin drugs, artificial oxytocin, insemination and hatching, and is suitable for artificial reproduction of copperfish. Background technique [0002] Round mouth copperfish ( Coreius guichenoti ) belongs to Cypriniformes (Cypriniformes), Cyprinidae (Cyprinidae), Gotiongiae (Gotiongiae), copperfish genus, and distributes and grows in the middle and upper reaches of the Yangtze River. As a river migratory fish that lays floating eggs, its gonad development is highly dependent on the special habitat in the middle and lower reaches of the Jinsha River. In recent years, with the step-by-step development and operation of the Jinsha River cascade power stations, the habitat of the copperfish has been reduced, the migration channel has been blocked, and its repr...

AI Technical Summary

Problems solved by technology

[0003] Through literature search, it is found that an existing expert has reported a method for artificial induction of copperfish, but there are many differences with the present invention, such as different oxytocin drugs used, different insemination methods, and different hatching devices