Method for directionally breeding finless eel male parents

Abstract

The invention relates to a method for directionally breeding finless eel male parents and belongs to the technical field of fishery scientific application. The method is characterized by comprising the following steps: continuously fasting for 30 days after the female finless eel spawns, thereby quickening the masculinization conversion of the spawned female finless eel; recovering the feeding for the fasted finless eel; stopping feeding till the water temperature is reduced to 15 DEG C in the last ten-day of November in the same year; and then causing the finless eel to stop eating and start to overwinter; starting to feed when the finless eel starts to eat while the water temperature is above 15 DEG C in April in the next year; transferring the finless eel to the front side of a breeding net box after feeding till the last ten-day of April. According to the method provided by the invention, the spawned female finless eel parent is converted to the finless eel male parent 5 months earlier, the masculinization rate is above 95%, 100-150g functional finless eel male parents capable of normally mating in a mating season can be acquired in batches, and the acquired functional finless eel male parents can be used for effectively solving the problems of large size and difficulty in finding of the male parent during an artificial finless eel breeding process.

Description

Technical field: [0001] The invention relates to a method for directional cultivation of rice field eel male parents, which belongs to the technical field of fishery science application. Background technique: [0002] Rice field eel (Monopterus albus) is one of the famous freshwater fishes that has developed rapidly in recent years in my country. Its main breeding areas are located in Hubei, Hunan, Anhui, Jiangxi, Zhejiang and other provinces in the middle and lower reaches of the Yangtze River; rice field eel farming has become an important aquatic product in these areas. The leading industry of aquaculture. [0003] But at present, the seedlings needed for rice field eel farming are mainly wild resources, and the wild rice field eel seedlings cannot meet the scale and industrialization needs of rice field eel breeding in terms of stocking time, quality, quantity, and source. Therefore, rice field eel seedlings The manual mass production of high-quality eels is an inevitabl...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiencies of the prior art, the object of the present invention is to provide a method for directional cultivation of the male eel parents, which can speed up the sexual transition time of the eel parents, obtain a large number of male eel parents with the same specifications as the female eel parents, and solve the problem of artificial imitation. Difficulty in finding male parents in the process of large-scale breeding of rice field eel seedlings in an ecological way