Method for cultivating large-size eel fries

Abstract

The invention relates to a method for cultivating large-size eel fries. The method is characterized in that cultivation net cages are arranged in rows in a pond, and the spacing between every two net cages in each row is 1-1.5m; the throwing density of the eel fries is 4000-5000 pcs/m<2>, and thrown feed is animal live baits, namely tubificidae; in the first one month of a cultivation stage, the feed quantity for every ten thousands of young eels is gradually increased from 500g to 2000g, and the eels are fed three times each day; after the eels are cultivated for one month, the daily feed quantity accounts for 8-10% of the weight of each ell fry, and the eels are fed once each day, and the feeding is stopped when water temperature is lower than 12 DEG C in the middle ten days of November each year; and during the cultivation period, attention is obliged to be paid to the complete condition of the net cages, grading feeding is performed timely according to the size of individual eels, and alternanthera philoxeroides is used to cover the inside of the cultivation net cages in a wintering period. According to the method disclosed by the invention, the cultivation survival rate of the eel fries can be increased to 80-90%; and after ten months of cultivation, the individual size of eels reaches 8-10g in average, and a large scale of high-quality large-size eel fries can be provided for scale cultivation of the eels.

Description

Technical field: [0001] The invention relates to a method for cultivating large-size eel fry, belonging to the technical field of fishery science application. Background technique: [0002] Eel is one of the famous and high-quality fish that has developed rapidly in my country in recent years. 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. Eel farming has become one of the leading industries in the aquaculture industry in these regions. [0003] In the process of large-scale artificial breeding of eel, there is a shortage of artificially bred seedlings, and currently the seedlings are mainly wild eel seedlings. Breeding wild eel seedlings has a low survival rate in production, and the number and source of wild seedlings cannot meet the requirements of large-scale eel breeding and industrialization. Although the artificial breeding technology of eel seedlings has made breakthro...

AI Technical Summary

Problems solved by technology

Breeding wild eel seedlings has a low survival rate in production, and the quantity and source of wild eel seedlings cannot meet the requirements of large-scale and industrialized eel farming.

Although the artificial breeding technology of eel seedlings has made some breakthroughs in the near future, the survival rate of artificially hatched eel seedlings from immature eels to large-scale seedlings with an individual body length of 15-20 cm and a weight of 5-8 g is low, and it is still not possible. mass production