Circulating water culturing system and method for rearing early fry of hybrid snakehead based on this system

Abstract

The invention provides a circulating water culturing system and a method for rearing early fry of hybrid snakehead based on this system. The circulating water culturing system is characterized in that a circulating water closed loop is composed of a fry rearing pool, a fry collecting pool and a water treatment pool, and the water treatment pool is added with an aerator and a temperature controller. By using the circulating water culturing system to control a fry survival environment, dividing a culturing cycle into a live food stage, a live food replacement stage and a feeding training stage according to conversion law for feeding habits of hybrid snakehead fry and feeding with different foods in the three stages, conversion stability is guaranteed for feeding habits of fry, and problems that existing pond rearing of hybrid snakehead fry is high in food residue rate and non-uniform in specification, fry easily suffers from parasitic diseases in early stage and are low in survival rate and production is bound by ambient conditions are effectively solved; the method for rearing early fry of hybrid snakehead based on this system is higher than 85% in average fry survival rate and 10-15 times as high as traditional pond rearing of fry in production efficiency.

Description

technical field [0001] The invention belongs to the technical field of aquaculture seed cultivation, and in particular relates to a circulating aquaculture system and a hybrid snakehead early fry cultivation method based on the system. Background technique [0002] The hybrid snakehead is the male parent of the black snakehead and the female parent of the spotted snakehead, and the F 1 For generations, hybrid snakeheads have become the main cultured species of snakeheads in my country. It shows the advantages of fast growth, strong stress resistance and high yield, and has obvious heterosis, and the breeding scale is expanding year by year. [0003] The individual morphology and physiological function of hybrid snakehead fish ponds will undergo tremendous changes in the first 15 days of cultivation. The existing rough cultivation mode of fry ponds is likely to cause low survival rate due to the uncontrollable breeding environment. It is specifically manifested in the follo...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problems of high residual feeding rate, irregular seed size, easy parasitic diseases in the early stage of fish fry, low survival rate, and production restricted by environmental conditions in the cultivation of hybrid snakehead seedlings in existing ponds.

Images