The scientific name of Laizhou shuttlecock is Laizhou Sansui Swimming Crab, which is commonly known as Big Crab. It refers to the swimming crab that is named after the Laizhou name and is caught and cultured within the geographical scope of the country of origin. Because of the three tumors on the back of the carapace, the overall shape resembles that of a shuttle. Therefore, it is known as the three-ported crab. The beach in Laizhou Bay is slow and stable, suitable for the habits of the crabs. More than a dozen rivers, including Jiaolai River, Shahe River, and Wanghe River, carry a large amount of nutrients into the sea to promote the reproduction of plankton, and prepare enough food for crabs. The unique conditions that make it unique, make the Laizhou crab a big, full, delicious, famous in China and foreign countries.
Laizhou Crab is rich in protein, fat, carbohydrates, calcium, phosphorus, iron, vitamins, and amino acids, and has a high nutritional value. Due to the government's adoption of proliferation and release, natural resources have only increased. In 2009, Laizhou produced more than 5 million kilograms of crabs annually and sold them to cities such as Beijing, Tianjin, Jinan, and Qingdao. Crab canned and frozen crabs were exported to Hong Kong, Japan, and Southeast Asian countries. Nationally renowned Laiwu Swimming Crabs have begun to apply for National Geographic trademarks. In order to protect and develop this excellent aquatic product, Laizhou Municipality has established a city-level portuguese germplasm resource conservation zone and established a provincial-level portine crab original breeding farm.
The three-ported crab is a warm, perennial, large crab species and is also the largest species of crab in China. Good at swimming, will also dig sediment, often lurking near the bottom of the sea or estuary, aggressive ferocious, fertility, and rapid growth. At the end of March, crabs migrated to spawning areas in shallow waters. The largest individuals in the crabs ranged up to 750 grams. In mid- and late April, the spawning period was high. From the first young crab period to the mature period, it usually takes 3 years. Female crabs in the nearshore spawning area accounted for more than 80%, while in the open sea, the number of male crabs was higher, and the main fishing period was in April. According to the reports from the old fishermen, the temperature during the winter or the water temperature in the overwintering field was higher for the catch of the crab. influences. The crabs are most full before and after the rain, although they can be caught in autumn, but they are not plump (but before the winter, the male crabs are particularly plump and full, and there are “Guigu male crabsâ€). The male crabs are commonly known as “nicky umbilicus†and immature males. The crab is called "inspection umbilical", female crab commonly known as "round umbilical", female crab is better, pregnant crab is also called "pomegranate yellow", male and female crabs market prices vary widely. Crab meat is white, fleshy, tender meat, creamy cream and delicious. In particular, the flesh of the two clawed chelipeds is silky and sweet, and the crab is savory and delicious. As Li Yu said in the Qing Dynasty, “crabs are fresh and fat, sweet and greasy, white jade and expensive gold, and they have created three flavors of fragrance, but no one can go on.†The crab contains 14 grams of protein per 100 grams of meat, 2.6 grams of fat, and several other nutrient elements. In general, the method of cooking is steamed, and the meat is marinated in ginger vinegar, served with liqueur, and has a distinctive flavor. Bai Juyi, a great poet in the Tang Dynasty, said that "Lu Zhen bears bad palms and seafood crabs become chewed up." He added that the sea crab's chewing foot and the bear's paw will be considered together. In addition to fresh food, it can be dried into crab rice, ground crab sauce, salted crab (halo crab), and made canned food. Crab shell can be used as raw material of chitin, and the economic benefit is very considerable.
Due to overfishing in recent years, the natural resources of the crab are also decreasing. In order to meet the needs of the market and properly protect resources, artificial breeding has been carried out in some places along the coast in recent years. According to reports, the cultivation of earthen ponds is preferred. The pond structure is similar to the intensive culture of shrimp and earthen ponds. The area is suitable for small and medium sized animals, with a water depth of 1.5 to 2 meters, and maintaining good water quality. The bottom of the pond is covered with coarse sand and shelter to allow its habitat. The same culture pond must be stocked with the same size seedlings to avoid mutual killings. Another method is to put the captured lean crabs in the earth ponds for raising after the autumnal mating, feeding small trash fish, small shellfish, etc., to promote fattening and harvesting the supply market in the early winter.
Sanwa crab is one of the most important export products in China. It exports to countries and regions: Japan, Hong Kong, and Macao. Export ports: Liaoning, Hebei, Tianjin, Shandong, Jiangsu, Zhejiang, and Fujian.
The Laizhou portabella body is rich in body fat, shell is thin and positive, white flesh, delicate meat, high fullness, creamy cream, delicious taste, nutrient-rich, for the top of the crab, its taste is significantly better than other producing areas, is the vast Fisheries preferred fishing and breeding species.
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