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Th 3, 13/12/2022 | 17:00 CH

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Geographical indication protection of “Ca Mau” for prawn

On September 30, 2021, the National Office of Intellectual Property issued Decision No. 4287/QD-SHTT on the grant of the Certificate of Geographical Indication Registration No. 00110 for the "Ca Mau" prawn product. The Department of Science and Technology of Ca Mau province is the organization managing this Geographical Indication.

Ca Mau prawn is a long-standing product, since the establishment of the province, the production of prawn products for food has taken place. From the beginning of the 19th century, the activity of catching prawns began to take shape. Prawn farming has been developed since the 1980s, due to good adaptability and development, the production scale of prawns is increasing. Currently, the Ca Mau prawn has become an indispensable gift for every visitor when coming to the Ca Mau province. The prawn products of Ca Mau province are not only sold in Ca Mau province but also distributed to other provinces in the country and exported to countries around the world. Ca Mau prawn is chosen by consumers because of its high nutritional content, quality, meaty shrimp, and sweet and firm, with a characteristic aroma when eaten. The dish made from prawns is not only delicious but also very good for health, effectively increasing resistance, good for the cardiovascular system, developing intelligence and vision, and helping to prevent bone diseases.

Ca Mau prawn has a thick, hard, and shiny shell, when eaten, it has a tough, sweet and bold flesh. Weight of raw prawn in Ca Mau ranges from 39.70 - 54.90 grams/head, crude protein content 19.13 - 23.32%, salt content 3.3 - 4.9 g/kg, content sugar content 0.44 - 1.89 g/kg.

Prawn processed in Ca Mau has tough, sweet, and bold flesh which has Omega 3 content at 0.05 - 0.1 g/100g, Omega 6 content at 0.04 - 0.08 g/100g, and salt content at 0.3 - 0.51%.

The quality of Ca Mau prawn is due to the specific natural conditions as well as the production methods of shrimp farmers in the geographical area.

The aquatic environment plays a very important role in the growth and development of prawns. Because Ca Mau has a protruding terrain in the East Sea and is not close to major estuaries flowing from upstream, the water source in Ca Mau is not polluted like other areas does not have the phenomenon of sweetening, which changes the salinity of the culture environment. Ca Mau prawn ponds have an average salinity of 23.34 ‰, average pH of 7.74, perfectly suitable for prawn growth and development, helping prawn molt easily and quickly harden the shell. In addition, aquatic animals and plants in Ca Mau's prawn farming area are abundant and diverse: the number of aquatic animals is 4,500 - 1,126,333 individuals/m3; the number of aquatic plants is 1,138 – 9,833 individuals/m3. A large number of individuals and species of these aquatic plants and animals will positively affect the growth and development of prawns because these animals are food for prawns.

Due to the habit of living on the pond bottom during the adult stage, factors related to the pond bottom also affect the growth, development, and quality of Ca Mau black prawn products. The pH in the bottom mud of Ca Mau prawn ponds ranges from 6.93 to 8.08, the total potassium content is high from 5,202.6 to 9,430.8 mg/kg, and the iron (Fe) content is low from 5,202.6 to 9,430.8 mg/kg. 38.8 - 52.3 g/kg, low NH3 content at 14.82 - 35.98 mg/kg, low H2S content at 0.76 - 82.19 mg/Kg.

Ca Mau prawn has always maintained its reputation and quality thanks to the production method maintained since the farming and exploitation of prawn began to thrive from 1980 to the present. The majority of prawn varieties are natural breeds because the shrimp migrate from the sea to the shrimp farming areas of households to breed and develop. In addition, farmers also stocked additional seeds produced in Ca Mau province.

During shrimp farming, farmers do not add any industrial feed but mainly feed from nature. Around the shrimp pond, mangrove trees are arranged such as Rhizophora apiculata, Aegiceras corniculatum, and Bruguiera. Among them, the most popular is the Rhizophora apiculata, which has the effect of blocking sunlight. The roots of the Rhizophora apiculata tree create shelter for prawns. Rhizophora apiculata leaves decompose in the pond creating a natural food source for prawns, contemporary help shrimp avoid predators.

Shrimp powder, shrimp seed, and sub-adult shrimp tend to live near the coast and in coastal mangroves. When shrimp mature, according to behavior, shrimp will move to the sea, because they prefer to live in deep water, with high clarity and more stable salinity. Taking advantage of this behavior, shrimp farmers will harvest shrimp on the 1st and 15th days of the lunar calendar (± 2 days). This is the time of the highest tides of the month. When the tide is high, people open sluice gates in ponds and lagoons to get water from the sea, in front of the sluices, put coarse filters to prevent waste. When the water level in the pond reaches its peak, the sluice gate will be closed. After the water has been taken in, the lagoons and ponds are drained (the time of draining depends on the time of low tide) to empty into rivers and estuaries through the sewer system. At the location of the sluice, people put nets to catch shrimp. Due to the habit of moving, only adult shrimp will follow the current to go out and into the net. Thus, the exploitation of black tiger shrimp is mainly using traditional methods, rather than using nets caught directly from ponds and lagoons. After harvesting, black tiger shrimp are frozen and transported to the processing area within 24 hours.

Geographical area: Including communes, wards, and towns in Ca Mau province, specifically:

- Rach Goc town and the communes of Dat Mui, Tam Giang Tay, Tan An Tay, Tan An, Vien An Dong, and Vien An in Ngoc Hien district;

- Nam Can town and Dat Moi, Ham Rong, Hang Vinh, Hiep Tung, Lam Hai, Tam Giang and Tam Giang Dong communes of Nam Can district;

- Cai Doi Vam town and the communes of Nguyen Viet Khai, Phu My, Phu Tan, Phu Thuan, Rach Cheo, Tan Hai, Tan Hung Tay, and Viet Thang in Phu Tan district;

- Dam Doi town and the communes of Ngoc Chanh, Nguyen Huan, Quach Pham, Quach Pham Bac, Ta An Khuong, Ta An Khuong Dong, Ta An Khuong Nam, Tan Dan, Tan Duc, Tan Duyet, Tan Thuan, Tan Tien, Tan Trung, Thanh Tung, Tran Phan belong to Dam Doi district;

- Cai Nuoc town and the communes of Dong Hung, Dong Thoi, Hoa My, Hung My, Luong The Tran, Phu Hung, Tan Hung Dong, Tan Hung, Thanh Phu, and Tran Thoi of Cai Nuoc district;

- Song Doc town and Loi An, Phong Dien, and Phong Lac communes of Tran Van Thoi district;

- The communes of Ho Thi Ky, Tan Loc, Tan Loc Dong, and Tan Loc Bac in Thoi Binh district;

- Tan Thanh ward and An Xuyen, Dinh Binh, Hoa Tan, Hoa Thanh, Tac Van, and Tan Thanh communes of Ca Mau city.

Center for Examining Geographical Indication and International Trademark