CATDOLL : CATDOLL: What should we do if white shrimp grows slowly after 50 days?

1. What should we do if white shrimp grows slowly after 50 days?

Because the temperature of the shrimp in the small shed was low in the early stage, photosynthesis was not strong, algae metabolism was weak, water oxygen content was low, the water body was dominated by single green algae for a long time, beneficial bacteria were not introduced, the bacteria and algae phase was unbalanced, and there was not enough beneficial bacteria to decompose and transform organic matter, resulting in a large amount of organic matter accumulating at the bottom of the pond and in the water body. Through communication, we learned that the customer fed a large amount of feed in the early stage of liver transformation, the hepatopancreas was heavily loaded, and no effective liver transformation and liver protection measures were taken, resulting in liver transformation problems; at this stage, the customer feeds 3 meals a day (4 jin of feed/meal), the shrimp are slow to feed, and the hepatopancreas of the shrimp is found to be red as a whole in the feed net

This stage is a critical period for the success or failure of farming white shrimp. With the increase in feed intake, the excrement discharged by the shrimp accumulates. The metabolic capacity of the water body in small shed shrimp farming is weak, the water body is prone to eutrophication, and the bottom is prone to dirtiness. Therefore, it is necessary to regularly improve the bottom quality of shrimps from 30 to 60 days old, and regularly sterilize and supplement the water body with beneficial bacteria in small amounts and multiple times to improve the water purification capacity, control transparency, and keep the water body fresh and stable, so as to increase the success rate.

Provided by Bangcheng Technology.

2. I want to farm shrimp. Can I farm several crops a year? What are the benefits?

At present, the Chinese shrimp market is dominated by white shrimp and river shrimp. The eastern region is mainly dominated by white shrimp, and the central and western regions of Sichuan, Chongqing, Gansu and the west are mainly dominated by river shrimp. However, with the promotion and development of cold chain transportation, white shrimp has also taken root in the central and western markets. However, according to my experience in import and export trade in other provinces, people in Chongqing, Sichuan and Qinghai are less accepting of white shrimp than river shrimp. They think that white shrimp is not as fresh, nutritious and tasty as river shrimp with slightly darker color. However, this is just the consumption habit of the people. With the continuous exploration and deepening of the market, these aspects can be improved. White shrimp is a fishery species with a large breeding volume and a wide breeding range in my country (the other two are Chinese shrimp and giant tiger shrimp). It was first introduced from the United States and is also known as Vannamei grass shrimp.

This type of shrimp is mainly distributed in the subtropical waters along the Pacific coast of the Midwest United States. The water environment in China is not suitable for the natural reproduction of white shrimp (so you don’t need to release them in coastal cities in my country), so China imports a large number of broodstock from the United States every year for pre-seedling breeding. High-density breeding ponds are prone to fighting and cannibalism of white shrimp, which will also increase the breeding load. The efficiency of oxygen-consuming substances such as excrement and leftover bait will be faster, making water quality management more difficult. Mainly deal with dissolved oxygen, permanganate index, water exchange rate, microbial floc technology, and the treatment of pond accumulation. Among them, the actual effect of microbial floc technology is not stable at present, but it is an important development trend in the future.

The biggest advantage of this technology is that the bait index is greatly reduced, the water requirement is greatly reduced (no water change is required during the whole process), the grass shrimp raised is of high quality, green and pollution-free, etc. These problems include daily observation of the grass shrimp's eating status, inspection and recording of water temperature, whether the grass shrimp's stomach and body color are normal, nutrient control during the liver transition period, multi-functional multi-dimensional addition, anti-stress treatment during seedling division (vitamin C is dissolved in water and then sprayed), regular inspection of Vibrio, etc. If it is a special breeding, attention should be paid to the rational use of beneficial active bacteria. Separate circulating return pipes and sewage pipes are set at the outlet, which are connected to the circulating water equipment system and the outdoor tail sewage treatment tank respectively. The usually clear breeding water will enter the circulating water equipment system through the return pipe. When sewage treatment is required, the sewage pipe will be opened to discharge into the tail sewage treatment tank.

The wastewater discharged by the grass shrimp recirculating aquaculture system is relatively small. After the last batch of grass shrimp is cultivated, the water body of the entire aquaculture system is relatively stable, and a new shrimp seedling can be directly promoted to continue the next batch of breeding, and the water quality reuse rate is high. However, during the breeding process, some residual bait, excrement, etc. cannot be treated by the fish tank water exchange sewage and adhere to the side wall pool, which needs to be completely drained and cleaned. During daily sewage treatment or occasional pool drainage, the sewage enters the outdoor tail sewage treatment pool through the sewage pipe. The tail sewage treatment pool contains different functional divisions, mainly physical sedimentation area and biological treatment area.

Shrimp can be raised in rice fields for 3 to 4 crops a year. Lobsters are usually available in about 30 days, but no more than 45 days. The yield per mu is determined by the amount of shrimp released. Generally, 50 to 80 kilograms of shrimp fry are released per mu. There are 50 to 60 shrimps per kilogram, and the yield per crop is about 200 kilograms. Shrimp is a fragile species that is extremely easy to reproduce. If the shrimp is not successfully cultivated, it is easy to die. Once it is successfully cultivated, it will reproduce rapidly, which is amazing! The income is considerable.

Generally speaking, 2 to 3 crops can be raised a year; the income is still very good, the weather is good, and the yield is high.

Shrimp farming can produce two crops a year, the income is very good, and the profit is particularly considerable.

3. Who knows what are the methods to prevent diseases in white shrimp?

Hello! This is Qiange Chatting About Cars. I am glad to meet you here. I hope my answer can help you. After seeing your question: "Who knows how to prevent diseases of white shrimp?", I want to say that shrimp may get enteritis, fluorescent disease, shrimp fixed ciliate disease, gill rot, crustacean appendage ulcer disease, etc. Now I will talk about how to prevent the first three diseases.

First of all, there is enteritis, which may be caused by bacterial infection or poisoning from eating certain algae. Symptoms: The digestive tract of diseased shrimp is red, and some stomachs are blood red. The midgut becomes red and swollen, and the hindgut part is turbid in appearance and has unclear boundaries. So how to prevent it? You can spray "Xia Shu Ning" throughout the pond, with a dosage of 1 liter to 2.5 liters per mu; you can also spray "Xia Shu Tai" 100 ml to 200 ml/mu or "Xia Jing" at a dosage of 100 ml to 200 ml/(mu・meter) throughout the pond. If the condition is serious, spray it again the next day; you can try to spray "Bromo Chloride" throughout the pond to make the pond water 0.1ppm to 0.3ppm to prevent this disease; spraying "Bromo Rich" 0.05 kg to 0.15 kg per mu of water surface also has a good preventive effect. You can also add "Shrimp Health" at a 1% addition to the feed, and use it in combination with "Detoxification and Liver Protection Powder" (1% addition) and "Detoxification and Shrimp Protection Pill" (1% addition), and add "LAPP-High-efficiency Nutrient" (0.5% addition) to promote the shrimp's body repair.

Secondly, the common fluorescent disease is caused by Vibrio infection. In the early stage of the disease, the gills, cephalothorax, and abdomen of the diseased shrimp fluoresce in the dark. The sick shrimp often break their tentacles, reduce or stop eating, swim slowly at the edge of the pool, and react slowly. So how to prevent this disease? You can try to spray "algae-lysing agent" throughout the pond for prevention, and take "brain gold for shrimp" (1% addition) orally to enhance the resistance of the shrimp. You can also spray "detoxification and weight loss spirit" to reduce the fertility of the water body and reduce the turbidity of the water body. 3. Add "shrimp health" to the feed at a rate of 1%, and use "detoxification and liver protection powder" (1% addition) and "detoxification and shrimp protection pill" (1% addition) at the same time, and add "LAPP-high-efficiency nutrients" (0.5% addition) to promote the repair of the shrimp body.

The third is the shrimp fixed ciliate disease. The cause of the disease is the parasites such as polycystic ovary syndrome, branched worm, monocystic worm, bell worm, etc. When the parasites are attached in large numbers, the gills, body surface, appendages, etc. of the diseased shrimp appear earthy yellow, and the body surface has yellow-gray fluffy substances. The diseased shrimp often floats on the water surface, has difficulty breathing, is slow to react, does not eat, does not molt, and has stagnant growth. So how to prevent this disease? Spray "Ciliate Clear" throughout the pond to make the pond water 1ppm; you can add "Shrimp Health" to the feed at a rate of 1%, and use "Detoxification Liver Protection Powder" (1% addition) and "Detoxification Shrimp Protection Pill" (1% addition) at the same time. Adding "LAPP-High-efficiency Nutrient" (0.5% addition) can promote the repair of the shrimp body. I hope my answer will help you.

Does anyone know what methods are there to prevent diseases in white shrimp? Use beneficial microorganisms regularly to maintain the stability of pond water quality. Use beneficial microorganisms every 7-10 days. You can use photosynthetic bacteria and Bacillus. Photosynthetic bacteria can be used together with zeolite powder. Adhere to the healthy shrimp farming model of "prevention first, prevention is more important than treatment".

First, avoid blindly pursuing high yields. Second, choose healthy and high-quality shrimp fry. Third, maintain good water quality. Fourth, choose high-quality feed. Fifth, prevent and control the spread of diseases. Sixth, use drugs for prevention and treatment.

There are many types of diseases of white shrimp, mainly viral (such as white spot syndrome, Taura syndrome, etc.), bacterial (vibriosis, enteritis, etc.), parasitic and nutritional diseases (black gill disease, soft shell disease, etc.). Disease prevention starts with pond cleaning, and the harm of diseases can be reduced by regularly applying water quality improvers, disinfectants, rationally catching and marketing, and reducing pond density.