Selection of Broodstock Origin and Seedlings of Penaeus vannamei

The origin of Penaeus vannamei is Peru, Mexico, Ecuador and Hawaii of the United States. It is also known as the three fine shrimp species in the world, including Chinese shrimp and Penaeus prawn. Its advantages are: 1 long breeding cycle, can be cultivated all year long; 2 strong disease resistance, high survival rate; 3 strong adaptability to the environment, can be cultured in seawater, brackish water or even fresh water; 4 fast growth; 5 good meat quality, and The head is small, the tail is small, the shell is thin, and the meat yield is high.
First, the source of broodstock: seed is the basis for breeding. Therefore, the quality of shrimp will directly affect the success or failure of farmed shrimp. The quality of shrimps has a direct relationship with the source of broodstock. This year, Guangdong, Hainan, and Fujian provinces of Penaeus vannamei broodstock are mainly cultivated from Hawaii, Taiwan and mainland Hainan Island.
1. Hawaiian broodstock: It is a non-specific pathogen (SPF) broodstock bred and screened by the Hawaii Institute of Oceanography in the United States. It is the first generation of South American white prawn broodstock. Its individual is larger, about 40-70 grams/tail. China's imports of the general choice of female 45-50 grams / tail, male 40-45 grams / tail, both long-distance transport, but also can maintain long-term continuous spawning. The spawning volume is between 100 and 2 million grains/tail.
2. Broodstock in Taiwan: Taiwan had succeeded in the breeding of white shrimp in South America in 1997, and a large number of breeding and broodstock cultivation were carried out. Therefore, the broodstock from Taiwan may belong to the second to fifth generations, and their individuals are small, generally 30-50 grams per tail, and the amount of eggs laid is less than 1 million seeds per tail.
3. Broodstock cultivated on Hainan Island in mainland China: Guangdong, Hainan, and Fujian provinces have successfully obtained a large number of techniques for breeding Penaeus vannamei seedlings since last year, and have conducted a large number of breeding and some broodstock breeding. Therefore, this genus is the second generation of genus, the size of the individual is 35-50 grams/tail, and the amount of eggs laid is about 1 million grains/tail. There are two sources of such broodstock, namely marine aquaculture cultivation and freshwater aquaculture cultivation. The broodstock cultivated in the salinity greater than 15 质量 has good quality, high survival rate, and large amount of eggs laid.
Because the fewer generations of broodstock progeny generation, the less degraded the germplasm, the better the broodstock quality. Therefore, broodstock from Hawaii, USA is the best, followed by broodstock cultivated on Hainan Island, and broodstock from Taiwan is the worst.
Second, the choice of South American white shrimp seedlings
1. SPF broodstock: This broodstock is of good quality without any specific pathogens. The cultivated shrimp grows fast and has strong immunity.
2. The body length of shrimps is more than 0.8?, and the size is uniform: Since the size of white shrimps in South America starts to appear to be above 0.7?, if they come from good quality broodstock, the eggs are good, and the differentiation of shrimps is not obvious and the size is uniform.
3, shrimp seedlings strong, strong vitality: the body is clean, normal body color, beat the seedling pool surface shrimp seedlings will jump, fishing in the bucket shrimp seedlings will sink, or put 10-20 tail in a wet towel, cover 10 Live shrimps returned to the water after minutes are considered to be healthy and healthy.
4, full of gastrointestinal food shrimp: good energy, healthy shrimp feed well, the gastrointestinal will be full of food.
5. Shrimp seedlings without white spot baculovirus: The current disease is mainly caused by viral diseases, and white spot baculovirus can be quickly detected by PCR. When shrimp seedlings are purchased, the shrimp seedlings can be brought to The relevant unit conducts tests.
Third, the desalination technology of Penaeus vannamei seedlings Since the Penaeus vannamei is required to have a salinity of 25‰ or more during seedling cultivation, it is stable. In freshwater aquaculture, shrimps need to be desalted. The desalination of larvae needs to be carried out during the prawn-feeding period, with fresh water desalination at a rate of 5 盐 per day. Fade to salinity 3-5 ‰ until it does not fade to zero, nor too fast, otherwise it will affect the survival rate of shrimp seedlings. It usually takes 5-6 days to fade. Therefore, it is necessary to order the shrimp hatchery in advance. When desalinating Penaeus vannamei, it is necessary to use salt or brine first to adjust the salinity of the pool water to 3-5 ‰ so that the shrimp can adapt and the survival rate is high.

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    About Company
    Yanchi County Yijian Biotechnol Co.,Ltd
    was founded in Dec 2012 , 
    by Mr. Dezhi Zhang , 
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    Company registered capital is 10 million RMB . 
    The main business sectors are culture , processing , internal sales , import and export trade of Organic Spirulina and Organic Chlorella products . 
    Yijian is known globally as one of the major suppliers of microalgae products across the world . 
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