An integrated ecological method for breeding fry of reeves shad

Abstract

The invention discloses an intensive ecological seedling raising method for shad. The prominent feature of the method is that an ecological system satisfying the growth and development of shad fry is established through the biological and ecological principles of cultured fish. The key measures of the present invention are as follows: add bait to cultivate green water and EM probiotic preparations in indoor high-density shad fry cultivation ponds. According to the development process of shad fry, adjust the feeding strategy and nutritional supplement in time. When the body length of the fry reaches 1.2-1.6 cm, the microencapsulated feed is domesticated by light-induced technology. During the metamorphosis period of the fry, nutritional enhancement is carried out through micro-worms. Nearly 2,000 shad fingerlings can be cultivated per cubic water body. The seedling efficiency is 26 times that of traditional seedling raising methods, and the survival rate is as high as 92%. The invention can be applied to the cultivation of other fish fry.

Description

Technical field: [0001] The invention relates to a method for cultivating shad seedlings, in particular to an advanced method for developing intensive ecological cultivation of shad shad seedlings according to the principles of cultured fish biology and ecology. Background technique: [0002] Shad is one of the most precious economic fish in the Yangtze River in my country. Since the 1970s, affected by many human factors, the shad population has declined sharply and is on the verge of extinction. Because American shad (Alosa sapidissima) is very similar to Changjiang shad in terms of morphological characteristics, fish meat quality and taste, when the Yangtze river shad is on the verge of extinction, American shad is introduced into the Chinese market, and the sales price is very considerable. Hundreds of yuan per catty, or even thousands of yuan. Since 2003, my country has introduced nearly tens of millions of fertilized eggs from the United States every year, forming an ...

AI Technical Summary

Problems solved by technology

Although the breeding area and quantity are expanding year by year, accidents occur frequently, and the success rate of shad farming is very low, less than 10%, which brings irreparable economic losses to farmers

The main reason for the failure of shad culture in the United States is that the early cultivation technology of shad is backward, mainly manifested in the early open bait series and unscientific nutrition, improper domestication methods, and unsuitable water quality conditions, resulting in excessive stress response of shad fry and death or growth slow

Although China invented extensive pond ecological farming and seedling raising technology two thousand years ago, it lacks intensive farming technology, and intensive seedling raising technology is even rarer. Most nursery farms use traditional seedling raising technology to cultivate shad seedlings, and the seedling raising rate is lower than 20%