Artificial spawning induction method for Varicorhinus macrolepis in southwest districts

Abstract

The invention discloses an artificial spawning induction method for Varicorhinus macrolepis in southwest districts. The method comprises the following steps: (1) choosing parent fish: the period around the Qingming Festival every year is the best time for artificial spawning induction; (2) storing the parent fish in a water flowing pool; (3) performing a first injection: the injected dose of the female fish is that 4 micrograms of LRH-A is injected into per kilogram of the female parent fish for the first injection, and the injected dose of male fish is half of the injected dose of the female fish; and (4) performing a second injection: the injected dose of the female fish is that 4 micrograms of LRH-A, 800 IU of HCG, 3-5 grains of PG, and 800 IU of LRH-A2 are injected into per kilogram of the female parent fish, and the injected dose of the male fish is half of the injected dose of the female fish. The method provided by the invention solves key technical problems in artificial breeding of Varicorhinus macrolepis, so as to realize fry breeding, provide protection for artificial breeding of product fish, and realize business development in a premise of protecting Varicorhinus macrolepis species. After utilization of the method for spawning induction, male fish and female fish grow mature synchronously, and the spawning rate, the fertilization rate and the hatching rate all reach 90% or more.

Description

Technical field [0001] The invention relates to the field of artificially induced spawning of fish, in particular to a method for artificially induced spawning of shovel jaw fish in the southwest region. Background technique [0002] Varicorhinus macrolepis (Varicorhinus macrolepis), belonging to Cypriniformes, Cyprinidae, Subfamily, and Tonosaurus. It is commonly known as moneyfish, white beetle, redfish, stone mouth fish. It inhabits gravel bottom with clear water. Mountain stream with low temperature, high flow velocity, 300-1500 meters above sea level. The southwestern region is mainly distributed in the upper reaches of the Daning River. The individuals are larger than the individuals in the Taishan area of ​​Shandong (the adult fish in the Taishan area generally does not exceed 20 cm in body length and weighs less than 100 grams), and can reach more than 1 kg. According to reports, Polyscaly shovel jaws have tender meat, rich nutrition and high medicinal health value. Its ...

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