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Many people think that the word "right" for shrimp should mean that shrimp are both male and female pairs of habitats, like winged birds, even if they accidentally see pairs of shrimp in the river, they will think that they are "right" shrimp. But the real reason is not this, shrimp do not have the habit of roosting in pairs, all shrimp are inhabited in large groups. The body of the shrimp is long and slightly flattened, hermaphroditic, the adult female shrimp is larger than the male shrimp, and the body color is also different; the female shrimp of chinese shrimp is grayish blue, and the male shrimp is yellow. The shrimp body is surrounded by a layer of chitinous exoskeleton carapace, which is secreted by the epidermal cells underneath it.
prawn! They are all sold in pairs, hence the name!
So where did the name "shrimp" come about? Shrimp are not so named because they are often paired with one male and one female. Shrimp got its name because in the past, this shrimp was a slightly extravagant food in the market, and it was sold in pairs, and the market was named after the "pair" as a unit to calculate the price. It is the same as today's crabs sold "only", but shrimp this animal due to its own size, one by one selling is not very good-looking. Chinese just like to pair things, which is called good things. As for whether "prawns" came from cixi's meal, as folklore suggests, there is no way to verify. But Japan prefers the singular.
Nutrition of shrimp meat
Shrimp nutrition is very high, shrimp contains 20% protein, is one of the foods with high protein content, is fish, eggs, milk several times or even more than ten times, shrimp and fish compared to the essential amino acid valine is not high, but is a nutritionally balanced protein source, in addition, shrimp contains glycine, the higher the content of this amino acid, the higher the sweetness of the shrimp. Compared with fish and poultry, shrimp has less fat content and almost no animal sugar as an energy source, shrimp is rich in taurine that can reduce human serum cholesterol, shrimp is rich in potassium, iodine, magnesium, phosphorus and other trace elements and vitamin A and other components.
Shrimp in the Middle: South American white shrimp
There are many species of shrimp, including Chinese shrimp, Japanese shrimp, shrimp genus (a total of 28 species) common members of the shrimp genus also include penaeus longifolia, Vannas shrimp, short-ditch shrimp, etc., the annual output of shrimp in the world can reach 300,000 to 400,000 tons, which is a support product in the fishery. Among them, the cultivation of Penaeus vannamei in South America is the most widely used. Penaeus vannamei (l.vannamei), scientific name Penaeus vannamei, is one of the three species with the highest shrimp production in the world, distributed in Central and South America, Pacific coastal waters, similar in appearance to Chinese shrimp, the normal body color is light gray, the shell is thin and fat, the meat is tender, the meat yield is as high as 65%, rich in nutrition, welcomed by the domestic and foreign markets; high temperature resistance but not low temperature resistance, currently breeding in China is plagued by diseases.
Since about 2000, there has been unprecedented resistance in the South American white shrimp industry, not because the market is not good, but because the mortality rate is too high! First there is the outbreak of viral diseases, followed by the early death syndrome caused by Vibrio parahaemolytic infection, the harm of hepatenter microspores, white stool, jejunum, red body, stealing death... Waves stimulate the nerves of shrimp farmers.
South American white shrimp diseases, low survival rate, seriously hindered the healthy development of shrimp farming, in recent years caused by the attention of the industry, it is foreseeable that in the near future, the difficulty of shrimp farming will eventually be overcome by us!
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