Mimic-ecological soil breeding method of rice field eels

Abstract

The invention provides a mimic-ecological soil breeding method of rice field eels. The mimic-ecological soil breeding method comprises the specific steps: (1) selecting a breeding place; (2) building a parent rice field eel culture pond; (3) selecting parents; (4) culturing the parents; (5) breeding and hatching, and separating; and (6) culturing young rice field eels. The breeding rate of the rice field eels can reach 85%-95%, the hatching rate of natural spawning fertilization can reach 99% or more and the collection rate of fries can reach 97% or more; large-batch and high-quality rice field eel fries can be provided so that the requirements on the fries by large-scale rice field eel culture are met; and the method has a very good application prospect. Furthermore, the rice field eels are bred with a net cage and the method is easy to operate; the bred rice field eel fries are easier to capture, the working amount is small, the production cost is low and the water quality is easy to manage; and the problem that the rice field eel fries is difficult to capture is solved and the industrial large-scale production of the rice field eel fries is easy to realize.

Description

technical field [0001] The invention belongs to the technical field of fishery science application, and in particular relates to a method for imitating ecological soil breeding of rice field eels. Background technique [0002] Swamp eel, also known as squid, long fish, etc., is a high-quality freshwater aquatic product species with high protein, low fat and high nutritional value. There has always been a high demand for swamp eel in market consumption. The rice field eels currently supplied to the market come from artificial breeding and wild capture. However, the wild resources of rice field eels are becoming scarce day by day, and the number of rice field eels caught naturally is decreasing day by day, and their specifications are getting smaller and smaller. In terms of collective and large-scale artificial breeding, my country Since the early 1980s, there has been an upsurge in rice field eel breeding. However, in the 1990s, due to the constraints of lack of rice field ee...

AI Technical Summary

Problems solved by technology

[0004] The breeding methods of rice field eel include artificial breeding and natural breeding. The full artificial breeding method is similar to the artificial breeding method of the four major domestic fishes. Exogenous hormones are used to induce ripening and labor of eels, and then artificial insemination is carried out, and hatching and development are carried out under artificial conditions. The difference is that the mature and effective sperm of the male eel is not easy to collect, and it is necessary to kill the male eel to collect the testis, which is the so-called "killing the male and extracting the sperm". Great improvement is mainly in the developmental level and quality of the female ovarian gonads, which can effectively increase the spawning rate and egg production. However, in the process of artificial insemination, the testis development of male eels is often not ideal, and it is difficult in the actual operation process. When mature and effective testis and sperm are collected, sometimes even less than 30%, the gonad development of the male and female parents is difficult to achieve synchronization, resulting in a poor artificial insemination rate, and the survival rate and utilization rate of the parents are low; the natural reproduction method is in the natural ecology Natural mating, spawning, and hatching in water areas are easy to operate. Because it is more in line with its natural breeding habits, eels usually spit bubbles to nest before laying eggs, and the foam they spit floats in the grass on the water surface. In addition, male eels have The habit of protecting the nest and protecting the young has better fertilization rate and hatching rate, but the parental gonad development of this method is poor, the egg production rate and egg production are relatively low, the seedling density and output are low, and the reproductive efficiency is low, so Both methods of reproduction have their pros and cons