Cultivation method of tall whitefish fry

Abstract

The invention discloses a coregonus peled fry breeding method. The water source employs spring; the water temperature is 10 to 16 DEG C; the dissolved oxygen is over 7mg / L; the pH value is 6.5 to 7.5; and the water flow speed can be adjusted in a range from 0.4 to 1.5 m / s. An area occupied by a fry breeding pool is 20 to 23 m<2> and the water depth is 50 to 80 cm; and an area occupied by a plankton breeding pool is 155 to 165 m<2> and the water depth is 80 to 120 cm. The method comprises: the fry breeding pool and the plankton breeding pool are sterilized by potassium permanganate and then larval stage feed is cultivated in the plankton breeding pool; coregonus peled spray sterilized by a povidone-iodine solution is put into the fry breeding pool and breeding is carried out by slow flowing water; larval stage feed with the 20% of total weight is fed each day and feeding is carried out at least seven days; and then breeding is carried out continuously at a food conversion breeding state. With the method, the coregonus peled spray is bred; and the cost is low, the survival rate is high, and the growth speed is fast.

Description

technical field [0001] Embodiments of the present invention relate to the field of fishery, and more specifically, embodiments of the present invention relate to a method for cultivating tall white salmon fry. Background technique [0002] High whitefish belongs to Salmonidae whitefish genus, is a kind of high oxygen consumption cold water fish, lives in high latitude ice water rivers and lakes, can be divided into three types, namely river type, lake type and river lake type three kind. River-type species, they migrate to rivers to lay eggs and reproduce, and their young fish migrate to lakes for feeding and fattening, and migrate with different lengths; lake-type species, they adapt to life in still water of lakes, and can complete life such as feeding, growth, and reproduction The whole biological process of the activity; and the river-lake type species, they are between the river-type and lake-type species. The nutrition in the muscle of high whitefish is comprehensive...

AI Technical Summary

Problems solved by technology

At present, there are few complete sets of artificial breeding techniques for high whitefish. Chinese patent 200910113538.2 discloses a method for artificial breeding of high whitefish. It introduces in detail the operation method of several stages from parent selection to fry cultivation. The fish fry after the film are transferred to the breeding tank for feeding. The water depth of the breeding tank is 30cm, the stocking density is 400 fish / L, the dissolved oxygen in water is greater than 7mg / L, and the fry opening feed is Artemia, and the daily feeding amount is 20% of the total weight of the fry. About 6-8 times of feeding, until the fry grow to a body length of more than 1.5 cm and respond sensitively to external light and shadow, they emerge and grow up in fish ponds

The fish fry breeding technology in this patent is not mature. It only briefly introduces the amount of dissolved oxygen and the feeding amount of open feed. It does not involve other key technologies for the survival and growth of fry. Control the key factors affecting the survival and growth of fry