CATDOLL : CATDOLL: Is shrimp farming risky? (Why is shrimp farming so risky?)

1. Is shrimp farming risky?

Without experience, the risk is very high!

1. Clean up the silt and weeds. For shrimp ponds that have been raised for more than one year, the accumulation of residual bait and feces in the pond has made the pond water shallower and the amount of toxic substances increased. Therefore, before releasing the shrimp fry, the shrimp pond must be cleaned up with high standards and quality. The desilting area must reach 100%, and the water depth in the pond must be more than 1.5 meters. Then use bleaching powder to "clean up the weeds".

2. Fertilize the water and breed the bait, and add shrimps at the right time. In late April, add water to the shrimp pond to make the water depth reach 0.5 meters, and apply 2.5 kg of urea per mu. Make the algae and rotifers in the pond proliferate in large quantities to achieve the purpose of fertilizing the water and breeding basic bait. Around May 20, add appropriate amount of shrimps, 30,000 to 40,000 shrimps per mu, and make sure to add healthy and healthy shrimps.

3. Adjust the water quality. In the early stage of shrimp cultivation, the water is changed less frequently. When the transparency of the pond water drops to 15 cm to 20 cm, the water should be changed once, and the amount of water changed is 1/2 of the pond water. In the middle stage of cultivation, the water is changed every 10 to 15 days, and the amount of water changed is 1/4 of the pond water. The method of changing water is to drain the bottom water in the pond first, and then add new water. It is important to prevent mixed water shrimp cultivation, where one side is drained and the other side is filled. In the flood season with more rainfall, do not drain or irrigate on a large scale, but drain the surface fresh water to ensure that the salinity of the pond water is relatively stable.

4. Feed appropriately. Make a push net and sample 50 to 100 shrimps every morning at 5 am. Carefully observe the stomach and growth of the shrimps. At the same time, use a rotary net to measure the survival rate of the shrimps in the pond so that you can know the situation and feed appropriately. Feed the shrimps 6 times a day in the later stage of shrimp cultivation. Feed them once before sunrise and after sunset, accounting for 40% of the daily feeding amount. Feed them once every 4 hours at night, accounting for 60% of the daily feeding amount. The daily feeding amount is 80% around the pond and 20% on the beach. However, do not feed when the water temperature in the pond exceeds 30℃, when there is little dissolved oxygen in the water, when the water quality deteriorates, when the fog is low and the atmospheric pressure is low, and when new water is injected for 1 hour.

5. Prevent floating heads. We must insist on regular observation, strengthen water quality monitoring, improve disease prevention and control technology, timely and accurately analyze and grasp the water conditions, pond conditions, weather conditions, and shrimp conditions, so as to achieve early detection and early prevention. When midges, shrimps, and small fish are found, it means that there is a lack of oxygen in the water, which is a precursor to shrimp floating heads. At this time, we must keep the water active day and night, and we can also make artificial waves, artificial oxygen, throw ice to cool down, and put in oxygenators. Feeding should not be done in the second half of the night when it is easy to lack oxygen. Do not find that the floating heads stir up the sediment, which can only aggravate the death of shrimp.

6. Catch shrimps, shellfish and fish for mixed culture. Adhering to the mixed culture of shrimps, shellfish and shrimps with fish will not only greatly increase the utilization rate of pond area and feed, reduce the cost of shrimp farming, but also be beneficial to the development and growth of shrimps, increase shrimp production, prevent shrimps from floating to death, and increase the benefits of shrimp ponds.

2. Why is shrimp farming so risky?

1. Incomplete pond cleaning increases the cost of shrimp farming. An investigation in a certain place found that some shrimp ponds had been cultivated for four consecutive years, and the silt at the bottom of the pond was more than 0.5m thick. When releasing shrimp fry every year, they were simply disinfected with quicklime or strong chlorine. This seemed to reduce the cost of farming. However, after the shrimp fry were released, they did not eat normally and grew slowly. The reason was that toxic and harmful substances such as ammonia nitrogen and nitrite seriously exceeded the standard. Shrimp diseases occurred frequently during farming, and the effect of multiple medications was not good, resulting in low-size adult shrimp, low yield, high cost and losses.

2. The source of seedlings is not legitimate, which increases the breeding cost. Farmers purchased shrimp seedlings from an irregular seedling farm. Although the price of shrimp seedlings is several dozen yuan lower than that of local seedling farms, the shrimp seedlings were not quarantined and brought in viruses. When the shrimps grew to 2 to 3 centimeters, they began to get sick and die, causing shrimp diseases to break out in the shrimp ponds. Drug treatment was useless. It seems that the cost of shrimp seedlings has been reduced, but in fact it is higher than the price of any high-priced shrimp seedlings.

3. Disease prevention and control are not standardized. Some farmers are not standardized in pond cleaning, disinfection, feeding, water quality management and disease prevention, resulting in shrimp diseases during the breeding period. Moreover, when the shrimp are sick, they try all kinds of medical treatments, and there is a widespread phenomenon of drug abuse and misuse. Not only can the shrimp diseases not be cured, but also the water quality deteriorates and drug residues are caused.

4. The cost of raising shrimp in ponds is high. First, strictly clean and disinfect the pond. Pay attention to removing silt, weeds, repairing the pond bank, and tidying up the water supply and drainage system. Second, pay attention to purchasing high-quality shrimp seedlings, and do not import seedlings from epidemic areas to prevent pathogens from being brought in. Third, strengthen water quality management, maintain a certain degree of water fertility, pay attention to the use of bottom quality modifiers, and start aerators to increase oxygen, etc.

3. What are the costs and profits of white shrimp farming?

White shrimp originated in South America and was introduced to my country for large-scale farming. Generally speaking, the cost of white shrimp farming is at a medium level in aquaculture, with high profits, and the gross profit of farming exceeds 60%. However, the white shrimp market fluctuates greatly, and the farming risk is also high.

Investments are always risky, and there are many risks in investing in shrimp farms, such as being easily affected by adverse weather such as cooling and rainfall. Once improperly managed, shrimps will have a high incidence rate, low yield, and poor sales channels. However, for shrimp farms, since the factory-scale recirculating water aquaculture model maintains a constant temperature and is not affected by adverse weather such as cooling and rainfall, shrimps grow faster in such an environment, have a lower incidence rate, and have a higher breeding density, effectively increasing shrimp production. Although the factory-scale recirculating water aquaculture model requires a large investment in facility construction, the long-term return is very significant in terms of increasing income.