Industrial loach breeding and fry culturing method

Abstract

The invention provides an industrial loach breeding and fry culturing method and belongs to the field of aquaculture. The method includes industrial breeding and fry culturing workshop construction and a specific breeding and fry culturing method. The specific breeding and fry culturing method includes: arranging bi-layer open net cages in a cement pool in a breeding workshop, wherein inner net cages are rutting and spawning places for parents, and outer net cages receive eggs concentratedly; and arranging a plurality of open foam boxes in a hatching and fry culturing workshop, placing the eggs into the foam boxes after counting, feeding loach fries by micro initial feed after hatching to fries to enable the loach fries to live through an initial critical period to become strong fries, and selling the fries or placing the fries into a pond for large-scale fingerling rearing. A workshop production process is adopted, breeding and hatching and fry culturing environments are guaranteed effectively, operation is facilitated, working efficiency is high, fecundity can be measured accurately, fertilization rate reaches above 98%, hatching rate basically reaches 100%, fry survival rate basically reaches 100%, and survival rate of large-scale fingerling rearing by placing the strong fries into the pond reaches above 50%.

Description

technical field [0001] The invention relates to a loach industrialized breeding seedling raising method, which belongs to the technical field of aquaculture. Background technique [0002] In recent years, the scale of loach farming has developed rapidly, and seedlings have become a bottleneck restricting the development of the industry. The situation of buying seedlings from all over the country is still a prominent problem, and most of them are wild-caught seedlings. It is difficult to guarantee the quality of seedlings, which increases the risk of breeding. How to carry out large-scale reproduction, improve the fertilization rate and hatching rate of loach eggs, the survival rate of seedling cultivation, and reduce labor intensity and reproduction cost are the key points. [0003] At present, loach seedlings are mostly bred in the open air, and a few rely on the four major domestic carp breeding facilities. The main methods are as follows: full artificial insemination, hat...

AI Technical Summary

Problems solved by technology

The problems brought about by artificial reproduction are high labor intensity, high direct cost, poor timing of insemination and other factors, which lead to low insemination rate and low hatching rate.

Semi-artificial reproduction is greatly affected by the natural environment, the fertilization rate is not high, the eggs cannot be accurately measured, and the hatching rate is not high

Natural reproduction Natural hatching, spawning is not concentrated, not conducive to mass production

Seedling cultivation is basically open-ended seedlings directly cultivated in ponds. Due to special habits, loach seedlings do not have much activity during the seedling cultivation period, and are affected by many unfavorable factors such as natural conditions, pond conditions, open bait, management level, etc., and the mortality rate is extremely high. The survival rate of breeding can only reach about 30%, most of them have a survival rate of less than 20%, and some even wiped out the entire army