Method of freshwater aquaculture of Litopenaeus vannamei in net cage

Abstract

A method of freshwater aquaculture of Litopenaeus vannamei in a net cage includes an early-stage preparation step of net-cage aquaculture, a water quality and salinity detection and preparation step before shrimp seeds are placed into the net cage, a shrimp seed feeding step for the net cage, a separative aquaculture step, a culture period management step and a harvesting step. The early-stage preparation step includes A, selecting a proper aquaculture water area; B, setting the net cage; C, placing the net cage into the water one month before the shrimp seeds are fed. The separative aquaculture step includes separating and transferring the shrimp seeds three times in the 20th day, the 40th day and the 60th day, reducing the density and prompting growth of the shrimp seeds. The culture period management step includes daily management and prevention and control of shrimp diseases. The method of freshwater aquaculture of the Litopenaeus vannamei has the advantages that a good well-off way is provided for efficient special aquaculture of various inland lakes and reservoir areas; temporary-rearing desalination formula of ultralow salinity smaller than or equal to 0.5%o; the net cage applicable to freshwater aquaculture of the Litopenaeus vannamei is modified; aquaculture quality of the Litopenaeus vannamei by the net cage is better; benefits of the Litopenaeus vannamei cultured in the net cage are considerable.

Description

technical field [0001] The invention belongs to the technical field of aquaculture, and in particular relates to a method for aquaculture of Penaeus vannamei in net cages. Background technique [0002] Penaeus vannamei is one of the three largest shrimp species with the highest aquaculture production in the world today. Penaeus vannamei is native to the Pacific coast of South America. Professor Zhang Weiquan from the Institute of Oceanology, Chinese Academy of Sciences was the first to introduce this shrimp from the United States. Now in my country's Hebei, Tianjin, Shandong, Jiangsu, Shanghai, Zhejiang, Fujian, Guangdong, Guangxi, Hainan, Hunan, Hubei, Xinjiang and other provinces or autonomous regions, breeding has been gradually promoted. [0003] At present, due to the perennial cultivation of Penaeus vannamei along the coast, the deterioration of water quality, the rampant spread of viruses and bacteria, and the frequent occurrence of natural disasters have caused larg...

AI Technical Summary

Problems solved by technology

[0004] The inland pure freshwater culture of Penaeus vannamei adopts soil pond culture, which requires high requirements for the transformation of shrimp ponds, and the input cost is high

Once encountering continuous rainy weather, the dissolved oxygen in the shrimp pond is not enough, it is easy to cause the ammonia nitrogen, nitrite, and hydrogen sulfide in the shrimp pond to rise, and eventually lead to the death of shrimp poisoning or production reduction

In 2014, the weather was also a rare El Nino phenomenon. The growth of prawns cultured in earthen ponds was slow. Due to insufficient sunlight and dissolved oxygen, algal blooms often occurred. Indicators such as nitrite and ammonia nitrogen continued to rise, which was not easy to control, resulting in low production of prawns or Draining ponds, the economic benefits of shrimp farmers decline

At the same time, the cultivation of prawns in soil ponds is destructive to the cultivated land, and there are certain limitations in its promotion.

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