The name of the Laizhou shuttle crab is “Laizhou Big Crab”, because it is named after the shuttle that was weaved in ancient times. The scientific name is Sancha Swimming Crab, which has enjoyed the reputation of Chinese famous crab since ancient times. Laizhou swimming crab is rich in protein, fat, sugar and calcium, phosphorus, iron and a variety of vitamins, amino acids, and has a high nutritional value. Laizhou shuttle crab body is strong, the shell is thin and color, the meat color is white, the meat is tender, the plump is high, the meat is like fat, the taste is delicious, the nutrition is rich, it is the top of the crab, its taste is obviously better than other producing areas, it is the vast The first choice for diners.

The name of Laizhou Shuttle Crab is “Laizhou Sanchao Crab”, commonly known as the big crab. The locals also call it “flying crab”. It is named after the “Laizhou” place name. Because the carapace has three tumors, the whole shape is like a shuttle shape. The scientific name is the three-spotted crab. Laizhou Bay Beach is stable and stable, suitable for the submerged sand habits of crabs. More than a dozen rivers in Laizhou carry a lot of nutrients into the sea and prepare enough bait for the crabs. The unique and superior conditions make the Laizhou crabs full of plumpness, especially delicious and famous in China and abroad. Sanshan Island, known as the Shenshan Mountain, is adjacent to the Laizhou Bay in the Bohai Sea. The three mountains are adjacent to each other and the Turks are tall and straight, hence the name Sanshan Island. The aquatic resources here are very rich, especially in the name of the swimming crab, which is delicious and has abundance of crab meat.

Laizhou shuttle crab quality technical requirements (a) provenance. Portunus trituberculatus belongs to the family Crustacea. (2) Seawater environment. The seawater temperature is 0 ° C to 28 ° C, the seawater salinity is 25 ‰ to 34 ‰, the pH value is 7.8 to 8.3, the dissolved oxygen is not less than 5.0 mg / L per year, and the chemical oxygen demand is not higher than 2.2 mg / L. The substrate is sandy and sandy. (3) Breeding. 1. Water source conditions: sufficient water source, convenient drainage and no pollution. 2. Pond conditions: pond water temperature is 4 ° C to 32 ° C, seawater salinity is 25 ‰ to 35 ‰, pH is 7.8 to 8.6, dissolved oxygen is not less than 4.0 mg / L per year, and chemical oxygen demand is not higher than 2.5 Mg/L. The water depth is about 1.5m, and the bottom of the pond is sandy and sandy. 3. Preparation before stocking: Drain the pond from the pond, expose the bottom of the pond, and disinfect the disinfection. 4. Crab stocking: (1) Pro-crab: Laizhou swimming crab, which is derived from sea fishing and breeding. Female crabs weigh more than 300g, and male crabs weigh more than 250g. (2) Crab seedlings: 2 year old crabs or crabs are required. (3) Stocking density: The stocking density of young crabs of 2nd instar is suitable from 6/m2 to 9/m2; the stocking density of crabs is preferably from 3/m2 to 4/m2. 5. Feeding: (1) Feed: The feed is mainly low-grade shellfish and miscellaneous fish and shrimp, supplemented by artificial compound feed. The content of crude protein in the compound feed is 35% to 45%, and the fat content is 8% to 12%. (2) Feeding: Feeding 2 to 4 times a day, feeding the whole pool evenly, increasing the predation chance of the swimming crabs, reducing the accumulation of the shuttle crabs and avoiding mutual killing. 6. Water quality management: According to the water quality, change the water in time, the transparency is kept at about 60cm. In the early stage, water was mainly used, and water was changed in the middle and late stages. The water level should be appropriately deepened from August to October; in the hot season, especially in hot weather, the water exchange rate should be increased and oxygenation measures should be taken. 7. Environmental and safety requirements: The prevention and control of the breeding environment and epidemic diseases must comply with relevant national regulations and must not pollute the environment. (4) Fishing. It began to be listed in September and will go on sale until May of the following year. The catching specifications are: male crab ≥350g, female crab ≥400g; male crab ≥250g, female crab ≥300g; male crab ≥200g, female crab ≥200g. (5) Quality characteristics. 1. Sensory characteristics: The appearance of the project indicator is green on the back and gray on the belly. The surface is smooth, no attachment, clear texture, less white spots, complete double chelation and foot. There are obvious white spots on both sides of the carapace, which is vital. The scent has the inherent fresh, astringent odor of the swimming crab and no odor. The silk is clear, white, and has no peculiar smell. Tissue muscle texture is clear, tight and elastic. The body is plump, and the ventral surface is firm with your fingers. 2. Physical and chemical indicators: project indicators male crab female crab water, % ≤ 80.0 ≤ 78.0 fat, % ≥ 1.5 ≥ 1.3 protein, % ≥ 13.1 ≥ 15.3 meat content, % ≥ 24.0 ≥ 20.0 calories, kilojoule ≥ 365 ≥ 387 fertilizer Fullness, g/cm ≥ 5.83 ≥ 5.973. Safety requirements: Product safety indicators must meet the relevant regulations of the state for similar products.

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Producers within the scope of protection of the Locust Crab Geographical Indication Products of Laizhou City may apply to the Laizhou Municipal Bureau of Quality and Technical Supervision of Shandong Province for the use of the “Special Mark for Geographical Indication Products”, which shall be approved by the Shandong Provincial Bureau of Quality and Technical Supervision and approved by the General Administration of Quality Supervision, Inspection and Quarantine. . The statutory testing agency of the Laizhou shuttle crab is designated by the Shandong Provincial Bureau of Quality and Technical Supervision.