Method for grazing type sturgeon breeding in lakes and reservoirs of plateau saline-alkaline waters

Abstract

Provided is a method for grazing type sturgeon breeding in lakes and reservoirs of plateau saline-alkaline waters. The method comprises the selection of grazing-type breeding lakes and reservoirs for sturgeons; provision of sturgeons cultivated by sturgeon fry culture and intensive culture facilities; domestication and feeding techniques of sturgeons before stocking; and the setting of escape-preventing fish nets and a catching method. The method is characterized in that the lakes and reservoirs which have flat lakebeds and reservoir beds, an average water depth of 3-4 meters, dead storage of more than 1 / 3 of water area, waterweeds covering more than 1 / 3 of the lake and reservoir area and bottom-dwelling biological resources, are chosen as grazing-type breeding lakes and reservoirs; the sturgeons are put into the lakes and reservoirs in spring and autumn at a water temperature of 10 -12 DEG C, and, before that, the feeding of the sturgeons is suspended for one week and the food habit domestication is carried out by feeding the sturgeons with surimi feed made of silver carps and bighead carps and little coarse fishes for two weeks; mixed feeds for the sturgeons are given in deepwater zones where the sturgeons frequently haunt in every June, July and August; and the sturgeons are herded in zones with large purse nets when the weight of each sturgeon reaches 4-5 kilograms, and the male sturgeons are caught while the female sturgeons are kept in the lakes and reservoirs until the sexual glands of the female sturgeons are mature.

Description

technical field [0001] The invention relates to a method for cultivating sturgeon in lakes and reservoirs in plateau saline-alkaline waters. Background technique [0002] There are many large and small lakes and reservoirs in the Northwest Plateau of my country (hereinafter referred to as lakes and reservoirs). The pH of the water is 8.35, the salinity is 1706.61mg / L, the alkalinity is 507.55mg / L, the hardness is 465.13mg / L, and the water type is Magnesium sulfate type III, most lakes and reservoirs become idle water bodies, and the water body benefits are low. In the early 1980s, the former Soviet Union adopted the method of grazing sturgeons in rivers, lakes, and reservoirs, and the sturgeon products they obtained earned 8 billion US dollars a year for the country. The lakes and reservoirs in the northwest plateau of my country have similar ecological environment conditions to the lakes and reservoirs stocking sturgeon in the former Soviet Union. The natural environmental ...

AI Technical Summary

Problems solved by technology

[0002] There are many large and small lakes and reservoirs in the Northwest Plateau of my country (hereinafter referred to as lakes and reservoirs). The pH of the water is 8.35, the salinity is 1706.61mg / L, the alkalinity is 507.55mg / L, the hardness is 465.13mg / L, and the water type is Magnesium sulfate type III, most lakes and reservoirs become idle water bodies, and the water body benefits are low