Artificial breeding method of Scaphesthes macrolepis fry

Abstract

The invention provides an artificial breeding method of Scaphesthes macrolepis fry, comprising: selecting sexual-maturity Scaphesthes macrolepis parent fish older than 3 years, and making sets at the ratio of female to male of 1:2; keeping the put density of parent fish in a spawning pond to be 6-8 sets / m<2>; putting one spawning nest for every 10 sets of parent fish, and laying coarse sand of which the average thickness is 4-6 cm in the spawning nest for the parent fish to spawn and unstick; in the spawning season, injecting oxytocic hormone into the parent fish to induce the parent fish to spawn and release sperm; making an incubation groove by battens and bolting silk; putting oosperm into the incubation groove to hatch in still water, wherein the dissolved oxygen in the incubation groove is more than 5mg / L, the illumination intensity is more than 1500-3000Lux, and the water temperature is 20-22 DEG C; after demoulding, temporarily breeding in the incubation groove; and after the fry floats up and flatly swims, introducing the fry into a plastic bag filled with water to be oxygenated and packaged or introducing the fry spawning pond. The method of the invention can intensively obtain the Scaphesthes macrolepis fry which favourably develops on batch, has simple operation and high parent fish fertility rate, is favourable for realizing large-scale production of Scaphesthes macrolepis and has an important meaning for protecting and culturing the Scaphesthes macrolepis wild resource on large scale.

Description

technical field

[0001] The invention relates to an artificial breeding method for freshwater fish, in particular to a large-scale artificial breeding method for multi-scaled shoveljaw fry, and belongs to the technical field of aquatic healthy breeding applications. Background technique

[0002] The multi-scale shovel-jaw fish, also known as the multi-scale white turtle, is distributed in the middle and upper reaches of the Jialing River system and the Han River system, the upper reaches of the Huaihe River, the Weihe River system, the Yihe River, the Luohe River and Mount Tai in Shandong. It is a precious small economic fish that lives in mountain streams with an altitude of 300-1500 meters. The multi-scaled shoveljaw fish is not only tender, delicious and not fishy, ​​but also rich in nutrition and unique medicinal and health care value. And famous all over the world. In recent years, due to many reasons such as drought, tourism development, overfishing and human-made poll...