The Lintou Pearl Clam is a geographical indication certification trademark.
Zhao'an County is located on the southeast coast, at the junction of Fujian and Guangdong, adjacent to Raoping County, Guangdong Province. Its geographical coordinates are 116°55′-117°22′ east longitude and 23°35′-24°11′ north latitude. , has a south subtropical maritime monsoon climate, with spring all year round, sufficient sunshine, pleasant climate, abundant rainfall, the average annual rainfall is 1447.5 mm, the average temperature is 21.3°C, there is no severe cold in winter, no scorching heat in summer, and the water system in the territory is developed. The main rivers are Dongxi and Xixi has a total freshwater area of ??68,000 acres. The sea area is rich in fishery resources and is rich in high-quality aquatic products such as mud clams, African clams, blue crabs, and oysters. Mud clams are commonly known as blood clams in Zhao'an. "Lintou pearl clams" are treasures among blood clams. They are abundant in the beach area of ??Lintou Village, Sidu Town, Zhao'an County. The terrain of the clams in this area is flat, and the fresh water and sea water of Dongxi River converge. The unique water quality here, with excellent mud, fertilizer and water, the tidal flat substrate for farming is silt or sand mud, the climate is mild, the annual average water temperature is 20.9 degrees, the water is clear and transparent, the tide is smooth, the seawater specific gravity is 1.022~1.025, and the water temperature range is 9.6 degrees Celsius. ~10.25℃, the intertidal zone is rich in biomass, with the largest number of phytoplankton including cyanobacteria and diatoms, and tropical and warm water species such as flexipoda, krill and mysid shrimp. It is suitable for the growth of shellfish and has superior natural conditions. The environment and unique geographical conditions have created the "Lintou Pearl Cock", which is round like a large pearl, with a light white, thin and hard outer shell, many and thin corrugated longitudinal lines, white inner wall, crisp and tender meat, rich blood and water, and suitable saltiness. , sweet and delicious, the meat is not only rich in protein, vitamins and trace elements such as potassium, magnesium, calcium, iron, selenium, but also has linoleic acid, eicosapentaenoic acid (EPA), 22 High-quality properties with a high proportion of DHA content. "Lintou Pearl Clam" has a long history of breeding. Since the Qing Dynasty, it has become famous and popular especially in Southeast Asian markets.
Before the Han Dynasty, Zhao'an had freshwater fish farming. In the Ming Dynasty, there was a tidal flat breeding industry. After the founding of the People's Republic of China, aquaculture received great attention, and the area and output of mud clam cultivation increased year by year. In 1963, the Provincial Department of Fisheries established a mud clam breeding farm in Meiling, stocked a large number of brood clams, established a thousand-acre clam seedling base, and propagated a large number of cockle seedlings. In the mid-1970s, Sidu Town, Zhao'an County vigorously developed artificially cultivated pearl cockles along the coast and achieved success, which promoted the further development and expansion of "Lintou pearl cockle" breeding. After years of active operation, "Lintou pearl cockle" breeding has become an important industry for the economic development of our county. According to a survey at the end of 2010, the county has 5,000 acres of pearl cockle fields, with an annual output of 5,000 tons of pearl cockles, creating an output value of hundreds of millions of yuan. .
In order to guide farmers to scientifically breed clams, the Zhao'an County Aquatic Technology Extension Station has promoted scientific clam farming through measures such as setting up breeding training courses and promoting tidal water storage to raise clams, so as to achieve a scientific process of raising clams, thereby improving the efficiency of clam farming. The quality, yield and market competitiveness of clams have enabled clam farmers to increase production and income.
The Zhao'an County Aquatic Technology Promotion Station is a public institution legal person approved and registered by the Zhao'an County Personnel Bureau, and is affiliated to the Zhao'an County Ocean and Fisheries Bureau. Its main responsibilities and business scope are to cooperate with the competent government departments to carry out investigations and research, and to provide suggestions and countermeasures to the competent government departments on major issues related to the development of the industry and enterprises such as industry standards, business development, and industrial policies based on the actual conditions of the aquatic industry; to establish and improve the industry The self-discipline mechanism coordinates and organizes member units and industries to formulate rules and regulations, coordinates the relationship between internal and external enterprises, explores effective mechanisms for industry self-management and self-discipline, promotes fair competition, and improves the overall quality of the industry.
The production area of ??products using the "Lin Tou Pearl Clam" certification mark is 117°10′～117°21′ east longitude and 23° north latitude within the administrative area of ??Zhao'an County, Fujian Province, People's Republic of China Between 21′ and 23°47′, Donggetou, Yancang, Lintou, Xizhang, Gangkang, Dongwu, Xiwu, Tianpu, Shanhou, _liao, Yuanqian, Qiucheng, Shitou (Anyu Village) and 13 administrative villages in 3 towns.