Semi-artificial bionic breeding method of finless eel

Abstract

The invention relates to a semi-artificial bionic breeding method of a finless eel. The method is characterized by adopting the following five processes: obtaining and selecting a parent finless eel; ripening the parent finless eel and carrying out hasten parturition on the parent finless eel; preparing a bionic breeding pool (mating and spawning pool) condition; managing mating, spawning and incubating, catching and cultivating eel seeding, and transferring the captured eel seeding into a special pool to cultivate. According to the semi-artificial simulated ecological breeding method, the breeding yield and the efficiency of the finless eel can be effectively improved; the brood amount, the spawning rate, the fertility rate and the seeding survival rate of the parent can be effectively improved by simulating natural simulated ecological breeding, and organically combining artificial propagation with the natural breeding habit of the finless eel through a proven technique of artificial ripening and hasten parturition commonly used on aquatic products, and the survival rate of the parent is also obviously increased in comparison with a whole artificial reproduction technology. Thus, the breeding yield and the efficiency of the finless eel are improved, and the enough seed matching is provided for large-scale cultivation of the finless eel.

Description

technical field [0001] The invention relates to a method for raising seedlings of rice field eels, in particular to a method for breeding and raising seedlings of freshwater economic aquatic products. 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. At present, the rice field eels 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 intensive and large-scale artificial breeding, our 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 f...

AI Technical Summary

Problems solved by technology

[0005] 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