Nanao Oysters

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    The oysters of South Australia are produced in the surrounding areas of Nan'ao main island and 35 small islands in Nan'ao County, Guangdong Province, with east longitudes of 116°39' to 117°19' and north latitudes of 23°10' to 23°32.
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South Australian oysters refer to oysters produced in Nan'ao County, Guangdong Province. Nan'ao County is the only island county in Guangdong Province. It belongs to the subtropical marine monsoon climate. It has a vast sea area and abundant marine life. The development of Pacific oyster breeding industry has unique advantages, and the production of oysters is high and the meat is plump.

Production Conditions Nan'ao County is one of the twelve island counties in China and the only island county in Guangdong Province. It is located at the junction of the “Environmental Protection” farms in Nan'ao Island, the three provinces of Guangdong and Taiwan, and the waters within 10 meters of the main island. The area is 246,000 mu, of which 100,000 mu can be raised. The sea area is vast, marine life is rich, and there are more than 1,300 species of marine life. South Australia is a subtropical marine monsoon climate with an annual average temperature of 21.5 °C. The sea area has sufficient nutrients and various types of bait. The annual average temperature of the sea area is 22.5 °C, the annual average salinity is 32%, the dissolved oxygen is 6.95 mm, and the pH is 7.8-8.2. The COD content is 0.28~1.42 mg, and the marine aquaculture area is not polluted by industry, agriculture, residents, etc., and the trend is smooth. The natural environment of Nan'ao Ocean is superior. There are more than ten islands such as Case Island, Hunting Island, Huyu and Guanyu as natural barriers along the coastline. It forms a natural breeding area with natural advantages such as Longmen Bay and Baisha Bay. Oyster farming has a unique advantage. Breeding Situation Nan'ao County strives to promote the development of Pacific oyster breeding industry, making Pacific oyster farming production an important industry pillar and fist product of the county's marine aquaculture industry. In 2005, the total area of ​​marine aquaculture in the county reached 41,300 mu, with a production of 53,800 tons and an output value of 187.85 million yuan, of which the area of ​​Pacific oyster farming reached 21,000 mu, accounting for 51% of the county's aquaculture area, and the aquaculture production was 37,800 tons, accounting for the county. The aquaculture production was 70.4%. Pacific oyster aquaculture production has become a new growth point for the county's fishery economy. It has become an important way to solve the life of migrant workers and laid-off workers. It is also a new industry for expanding the collective economy of fishing and rural areas, achieving fishermen's income increase and fishery efficiency. The stability of the fishing area. At the same time, Nan'ao County focused on the large-scale development of Pacific oysters, and took it as a key project of marine aquaculture in the county to form five major breeding areas. The county's aquaculture area increased from 3,000 mu in 1998 to 1 in 2002. Ten thousand mu, the total area has increased by 2.3 times, becoming one of the main breeding bases for the southern Pacific oysters in China. The Pacific Oyster Breeding Base of Baisha Bay in Shen'ao is the earliest development and construction base in Nan'ao County. By 2002, the area of ​​Pacific oysters raised only in the whole breeding base reached 4,000 mu, with an annual output of 10,000 tons and an output value of 10 million yuan. Economic Benefits Through hard work, the county's Pacific oyster farming industry has achieved rapid development. In 2006, the county's Pacific oyster farming area reached 21,000 mu. In 2006, the output of Pacific oyster farming reached 37,800 tons, accounting for 49.78% of the county's sea production. It has become a major key industry after the adjustment of fishery structure, and is also one of the major industries of the county's marine aquaculture industry, and has become the main life outlet of the masses. In 2006, the county's oyster farming professionals reached 3,000, and seasonal employees were 2,500. The development of Pacific oyster farming has become the main economic income of fishing village families.

South Australian oyster quality technical requirements (a) provenance. Pacific oyster (Crassotrea gigas). (2) Breeding environment. The trend of cultured sea areas is smooth, no industrial agricultural production and domestic wastewater pollution, water temperature 10 ° C to 32 ° C, sea water salinity 13 ‰ to 32 ‰, water depth 3.5 m to 10 m, no less than 1.5 m at low tide, pH 6.2 to 8.5. (3) Culture technology. 1. Seeds: Naturally collected from the protected area. 2. Harvesting: The breeding cycle is 9 to 12 months, and the catching specification: the shell length is not less than 6cm. 3. Environmental and safety requirements: The prevention and control of breeding environment and epidemic diseases must comply with relevant state regulations and must not pollute the environment. (4) Quality characteristics. 1. Sensory characteristics: The clam shell is emerald green, the carcass is milky white, the taste is delicious and tender, and the inner body has a round of light black. 2. Physical and chemical indicators: protein ≥ 14%, fat ≤ 3%. 3. Safety and other quality technical requirements: Product safety and other quality technical requirements must comply with relevant national regulations. Annex 3: Yayu quality technical requirements (1) source. Schizothorax (schizothorax.) prenanti, Schizothorax (Racoma) davidi]. (2) Environmental conditions. The water is fresh and pollution-free. Water temperature ≤ 22 ° C, dissolved oxygen ≥ 7 mg / L, transparency ≥ 30 cm, water depth 1m to 1.5m, pH 6.5 to 8. (3) Production methods. Natural fishing and aquaculture and cage culture within the protected area. (4) Breeding. 1. Stocking: stocking specifications of fish stocks ≥ 20g / tail. Stocking density: 100 to 200 fish/m2 for aquaculture; 80 to 150 fish/m3 for cage culture. 2. Fishing: Specifications ≥500g/tail. 3. Environmental and safety requirements: The prevention and control of breeding environment and epidemic diseases must comply with relevant state regulations and must not pollute the environment. (5) Quality characteristics. 1. Sensory features: body shape like sputum, scales as fine; tender meat, smooth and smooth taste. 2. Physical and chemical indicators: crude protein ≥ 17%, crude fat ≤ 2%. 3. Safety and other quality technical requirements: Product safety and other quality technical requirements must comply with relevant national regulations.

Apply to:
Producers within the range of oysters in South Australia may apply to the Quality and Technical Supervision Bureau of Nan'ao County of Guangdong Province for the use of “Special Marks for Geographical Indication Products”. They shall be reviewed by the Guangdong Provincial Bureau of Quality and Technical Supervision and reported to the AQSIQ for approval. The statutory testing agency for South Australian oysters is designated by the Guangdong Provincial Bureau of Quality and Technical Supervision.