CATDOLL : CATDOLL: What does “live shrimps directly supplied to Hong Kong” mean? Which companies are eligible for this?

1. What does “live shrimp direct supply to Hong Kong” mean? Which companies are eligible for this?

In 2017, Beihai Baotong Zhulin Farm officially passed the registration review for supplying live shrimp to Hong Kong, and obtained the "Registration Certificate for Inspection and Quarantine of Outbound Aquatic Animal Farms/Transit Farms" issued by the Guangxi Entry-Exit Inspection and Quarantine Bureau, registration number: 4500/AC014. It is the first company in Guangxi qualified to directly supply live shrimp to Hong Kong.

2. What are the main characteristics of shrimp?

Total length: Female adults are 180-235mm, male adults are 130-170mm. The body is long and flat, with a thin carapace and a smooth surface. Female shrimps are usually larger than male shrimps. The whole body of the shrimp consists of 20 segments, 5 segments in the head, 8 segments in the thorax, and 7 segments in the abdomen. Except for the tail segment, each segment has a pair of appendages. There are 5 pairs of walking legs, the first 3 pairs are pincer-shaped, and the last 2 pairs are claw-shaped. The front edge of the cephalothorax protrudes in the middle to form a frontal horn. The upper and lower edges of the frontal horn are serrated. The frontal horn is slender, straight and extends forward, with the top slightly exceeding the end of the second antenna scale, and the upper edge of the base is slightly raised and the end is tapered. The upper edge has 7-9 teeth at the base of 2/3 or 3/5, and the tapered end has no teeth; the lower edge has 3-5 teeth, and the teeth on the lower edge are very small. The cephalothorax has orbital antennal grooves, neck grooves and antennal lateral grooves, but no central grooves or frontal gastric grooves. The antennal lateral groove only extends to the vicinity of the suprastomach spine. The hepatic groove is thin and obvious, extending straight forward; there is no hepatic ridge below it. The posterior ridge of the frontal horn disappears to the middle of the cephalothorax. The oculogastric ridge is obvious, occupying 3/5 of the distance from the edge of the orbit to the hepatic ridge. The cephalothorax has antennal spines, hepatic spines and suprastomach spines. The orbital corners are round without ocular spines, and the anterior corners are also round without cheek spines. There is a longitudinal ridge in the middle of the back of the 4th to 6th abdominal segments, and the 6th segment is about 1.5 times the height. The tail segment is slightly shorter than the 6th segment, its end is very sharp, and there are no movable spines on both sides. The 6 segments of the head and the 8 segments of the thorax are fused into the cephalothorax, which is completely covered by the cephalothorax. The head also includes the frontal horns and the compound eyes with handles. The appendages are from front to back: 1 pair of the first antennae, 2nd antennae, maxilla, 1st maxilla, and 2nd maxilla. 3 pairs of maxillopods and 5 pairs of walking legs. The abdomen has 6 segments, the first 5 segments each have a pair of abdominal limbs, and the sixth segment has a pair of caudal limbs, which together with the tail segment form a tail fan. The abdominal appendages are well developed and suitable for swimming. Each body segment includes a dorsal plate and a ventral plate. The mouth is located on the ventral side of the cephalothorax, and the mouthparts are formed by the mandibles, the first maxilla, the second maxilla and three pairs of maxillopeds. The anus is located at the base of the ventral side of the tail segment. The length of the upper whip of the first antenna is about 11/3 times that of the cephalothorax, and the length of the lower whip is about 2/3 of the cephalothorax and equal to the frontal horn. The distal edge of the second antennal scales exceeds the first antennal handle but does not reach the end of the frontal horn. Its whip is very long, about 21/2 times the body length.

The body of Chinese shrimp is long and flattened, with a thin, smooth and transparent carapace. The shrimp consists of 20 segments, including 5 segments in the head, 8 segments in the thorax and 7 segments in the abdomen. Except for the tail segment, each segment has a pair of appendages. There are 5 pairs of walking legs, the first 3 pairs are pincer-shaped, and the last 2 pairs are claw-shaped. There are 7-9 teeth on the upper edge of the frontal horn and 3-5 teeth on the lower edge. The side groove of the frontal horn does not exceed half of the head and thorax. There is no liver back and the central groove of the rear ridge of the frontal horn. The third walking leg generally does not exceed the scale of the second antenna. The abdomen is long and flattened, and each carapace is separated from each other and can be flexed and extended freely. The third maxillary foot of the male is the same length as the palm. The female is blue-green, and the male is brown-yellow. Usually the female shrimp is larger than the male shrimp. Like other shrimps, the white shrimp can mature again after the ovaries are emptied. The interval between each spawning is 2-3 days, and only about 50 hours in the early stage of reproduction. Those with a high number of spawning can reach more than a dozen times, but after 3-4 consecutive spawnings, there must be a molting. The spawning time of Penaeus vannamei is from 21:00 to 3:00 in the morning. It only takes 1-2 minutes from the start of spawning to the emptying of the ovaries.

The white shrimp is also known as Penaeus vannamei, Penaeus vannamei, Penaeus vannamei, white shrimp, white shrimp, and belongs to the phylum Arthropoda, subphylum Branchiophylum, class Crustacea, subclass Soft Shell, order Decapoda, suborder Swimming, family Penaeidae, and genus Penaeus vannamei. The white shrimp is one of the three most productive species of farmed shrimp in the world today, and is also the most important farmed shrimp species in the Pacific and the Western Hemisphere. In Ecuador, Brazil, Venezuela, Colombia, and Mexico and Panama in Central America, white shrimp is the main farmed species. my country introduced it in 1988. Since the introduction of white shrimp, after the technical research of scientific researchers, the artificial breeding of white shrimp has been successful in my country, which has promoted the rapid development of white shrimp in my country. In Hainan, Guangxi, Guangdong, Fujian, Jiangsu and other provinces, a certain scale of farming has been formed. It is also the most promising species in my country's current shrimp farming.

3. What are the main common problems in the process of breeding whiteleg shrimp?

Long-term low pressure, hot and humid weather, and acid rain that never stops are also constantly attacking the shrimp breeding ground. Farmers are sometimes caught off guard. How can we better help farmers? It is very important to understand the common problems in the breeding process.

1. Empty stomach and jejunum

(1) The food line is broken, the shrimp eats more slowly, and some of them have empty intestines but not empty stomachs.

Treatment method: After the rain, use Water Purifier/Detox Super Cool to mix with water and sand and sprinkle it all over the pond to degrade toxins and relieve liver pressure; when the rain stops and the sky clears up, use 2 bottles of Biosafe + 1 bottle of Nano Oxygen to mix with water and sand and sprinkle it around the feeding area and the aerator, use 3 to 4 acres, and sprinkle it at night as appropriate.

(2) The intestines are empty and the stomach is empty, but the appetite is still relatively good. The liver appears eroded, atrophied and white, and there are occasionally shrimps swimming around.

Treatment method: It is recommended to use 1 pack of Xinjunke + at least 200 grams of Liukang Peizao cream/Algae Health 1 pack per 2 mu, soak and sprinkle, use once for mild cases, and then mix 80-100 catties of feed with 1 pack/bottle of Xinjunke, enzymatic polysaccharide, active garlic treasure, Qingyuan, and liver protection and growth promotion spirit; if the situation is more serious, use it twice for two days, and use water purification king or detoxification Baokang detoxification before use, and use 1 pack of Li Li Shen + Liukong Bottom Health or Bo Shuan for bottom care at night for 1.5-2 mu; if accompanied by soft shells, unsuccessful molting and hot weather, sprinkle 1 bottle of nano oxygen + 1 pack of terilis calcium per 4 mu at midnight. This method can save most shrimps in time, and the overall control state is good. After 4-5 days of use, the jejunal condition of the shrimps has improved significantly, the amount of food eaten has also increased, and the swimming phenomenon has almost disappeared.

2. Blue algae problem

This year, many ponds have been infested with blue algae, causing the pH value of the water to rise and the water color to become ugly, which has caused great concern to farmers. Such algae, such as Microcystis, Blue Fiber Algae, and Anabaena, are so numerous that they are clearly visible to the naked eye.

Treatment method:

If there are too many (the water color is mainly composed of Microcystis and Aphanizomenon), it is recommended to drain part of the surface water containing blue algae first, then use Water Purifier to detoxify, and after two hours, use 1 pack of Black Gold God + 1 bottle of New Live Bacteria King + 3 packs of Green Algae Source to spray 4-5 mu, focusing on the blue algae area, and use it again every two days. After using it twice, diatoms and green algae have increased significantly, and blue algae are not so scary anymore.

During the cultivation of white shrimp, the pH value in the water may be too high. This is probably because the fertilizer has grown single-cell algae in the water. The overgrowth of algae is the result of enhanced photosynthesis in the water, which produces a large amount of gas, causing the pH value to rise too high.

Some diseases may occur, leading to death, reduced production, increased breeding costs, and the occurrence of some diseases.

1. The differences among broodstock are significant, and the quality cannot be guaranteed. 2. The development plan is unreasonable. Compared with other shrimp species, white shrimp has lower costs and can generate more profits, which has led to the over-development of white shrimp farming in many regions, including Guangdong and Guangxi, which are still developing and expanding the scope of farming areas. 3. Diversified disease types