Artificial breeding method for crayfishes in net cage

Abstract

The invention discloses an artificial breeding method for crayfishes in a net cage. The method comprises: selecting the net cage; putting and preparing the net cage; inputting parent crayfishes; feeding the crayfishes; cleaning the net cage; and carrying out breeding management. An artificial inductive method of controlling illumination, controlling temperature, controlling water level, controlling water quality and carrying out reinforced feeding is adopted. Illumination is controlled to be less than 300 Lux, the temperature is controlled at 18-26 DEG C, control of water quality means maintaining stable water level, and control of water quality means maintaining dissolved oxygen in a water body being greater than 5 mg/L. The reinforced feeding means adding an animal feed and an artificial compound feed which accelerate gonad development of the crayfishes, cleaning the net cage periodically, and incubating egg-carrying crayfishes in a centralized manner.

Description

technical field [0001] The invention belongs to the technical field of aquaculture, and in particular relates to an artificial breeding method for crayfish cages. Background technique [0002] Crayfish are native to North America and are an important species of freshwater shrimp farming in the United States. In 1938, crayfish were introduced into China. The shrimp is now widely distributed in Northeast my country, North China, Northwest China, Southwest China, East China, Central China, South China and Taiwan. It has become an important resource of freshwater shrimp in my country. Jingmen City started large-scale farming of crayfish last year. In 2005, the area for cultivating crayfish in ponds, paddy fields, and swamps in Jingmen City reached 30,000 mu. Only the towns of Maoli and Guandang in Shayang County had an area of ​​20,000 mu of rice and shrimp continuous cropping in 2005. In 2006, the area of ​​crayfish farming in Jingmen City reached 50,000 mu, and the area o...

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Problems solved by technology

[0004] The object of the present invention is to provide a method for artificial breeding of crayfish cages, aiming to solve the problems of lack of seedlings and irregular specifications of shrimp fry in the crayfish farming industry. Unsynchronized eggs lead to problems such as uneven size and specification of shrimp seedlings and less emergence; the high investment cost, troublesome operation and instability of water temperature, water quality and water level caused by the "crayfish cement pond artificial breeding" mode lead to the Problems of high mortality and unsatisfactory economic performance

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