CATDOLL : CATDOLL: How many shrimps can be raised in one acre of pond?

1. How many shrimps can be raised in one acre of pond?

The yield per mu of artificially raised rock shrimp depends on the shrimp species and stocking density. Generally, for shrimp pond farming, if 10,000 mu is stocked, the yield is about 200 catties. If 30,000-50,000 mu is stocked, the yield is 500-800 catties. If it is freshwater shrimp, the yield per mu is 100 kg/mu.

Let's take South American shrimp as an example: large-scale farming of whiteleg shrimp requires 35,000 to 45,000 shrimp to be released per acre.

Because from the perspective of the breeding cycle, when the stocking density is between 30,000 and 70,000 tails/mu, the breeding cycle tends to be extended as the density increases. Including the first catch size, when the stocking density is less than 40,000 tails/mu, the breeding cycle is shorter, and the first catch size is larger, with an average of 41 tails/500g, which shows that the pond water under this density is not fully utilized, so the final per-mu yield is also the lowest. When the stocking density is 40,000 to 70,000 tails/mu, the size difference at the first catch is not large, and the average size is about 50-53 tails/500g, which is closely related to market requirements, because the general shrimp sales size is rarely less than 60 tails/500g.

In terms of daily weight gain, the daily weight gain of shrimps in the stocking density range of 40,000 to 70,000 per mu does not change much and tends to be stable. However, in terms of survival rate, it decreases significantly with the increase of density. After considering the two factors of density and survival rate, it is found that the number of shrimps in the pond is basically maintained at 37,000 to 43,000 per mu, indicating that the carrying capacity that the pond environment can withstand is also within this range.

2. Can I raise lobsters and shrimps together in a pond? What are their natural enemies?

Breeding production practice has proved that mixed culture of shrimp and crayfish is feasible. During the feeding period, the following issues should be paid attention to: ① The stocking density of shrimp and crayfish should be reasonably controlled. When the density is too high, crayfish may eat shrimp and shrimp may also eat crayfish; ② The dissolved oxygen in the mixed culture pond water should be maintained at more than 5 mg/L, and the minimum should not be less than 3 mg/L; ③ Ensure sufficient feed supply to prevent shrimp and crayfish, or shrimp and crayfish from killing each other; ④ Once shrimp and crayfish reach commercial specifications, they will be caught and sold.

Lobsters have strong adaptability, fast reproduction, rapid migration, and like to dig holes, which have a certain destructive effect on crops, embankments and farmland water conservancy facilities. However, the ability of lobsters to dig holes and their speed of movement on land are much weaker than those of Chinese mitten crabs. Lobsters can directly convert plants into animal protein and grow faster. Shrimp have strong adaptability to the environment, few diseases, can grow in lakes, ponds, ditches, rice fields and other water bodies, and do not require high breeding conditions. Green shrimps have high requirements for water quality, requiring sufficient water sources, fresh water quality, and no pollution. Green shrimps are omnivorous animals with a wide diet, but they are also selective. Plant feed prefers bean cakes, peanut cakes, bran, and rice bran; animal feed prefers earthworms, snails, small fish and shrimp, fish meal, flour, silkworm pupae, etc. The breeding pond should be built near the water source, with sufficient water, convenient drainage and irrigation, and the ability to adjust the water quality at any time. The environment around the pond is required to be quiet to avoid affecting the shrimp's feeding activities.

Natural enemies of shrimps: Voles, cats, dogs, cormorants, ducks, geese, otters and other carnivorous or omnivorous animals on the ground will prey on shrimps in shallow water and on the shore. Large water birds in the sky, such as geese, swans, and night herons, also like to catch shrimps in shallow water. Natural enemies in the water are the most dangerous. Both land snakes and water snakes like to prey on shrimps. Some ferocious carnivorous fish such as black fish, bass, mandarin fish, catfish, etc. like to feed on shrimps in the water.

Lobsters dig holes! ! If you raise lobsters, it is best not to raise them together! ! If you raise some worthless small fish, it is better! (You can feed the shrimp)

I suggest you ask an expert!

Our rural areas were like this before

It should work, lobsters don't know, frogs' natural enemies are snakes

3. Do you know the key points of shrimp farming technology? Do you understand all of these?

In recent years, freshwater shrimp farming in Suining County, Xuzhou City, Jiangsu Province has developed rapidly, with the main farming area of ​​nearly 12,000 acres. The author combined the experience of home-based guidance of freshwater shrimp farming by farmers and discussions with farmers, and summarized the technical measures to improve the efficiency of freshwater shrimp farming.

1. Choose a good breeding place.

Shrimp ponds should be built in places with sufficient water resources, fresh and pollution-free water, and abundant aquatic plants. The area of ​​aquatic plants should account for 20-30% of the pond area. The pond area should be 2-10 acres, preferably rectangular, with a water depth of 1.2-1.5 meters and silt not exceeding 10 centimeters. It is best to have shallow water around the pond. It is best to use quicklime to clean the pond and add fertilizer to the pond.

2. Pay attention to seedling quality

The best shrimp fry are those that are naturally bred in the ponds, which should be uniform in size, bright in color, and have strong jumping ability. Artificial breeding should use large-sized shrimps that lay eggs in the ponds as parents, and try to avoid not changing the species or cleaning the ponds year after year, and breeding and raising the shrimps by themselves, which will lead to the degeneration of their traits, small size, and poor disease resistance.

3. Improve stocking patterns and determine reasonable stocking density

To increase the production and benefits of fresh shrimp, we must change from extensive farming to intensive farming, from stocking spawning shrimp to stocking shrimp fry, and from one batch of shrimp to two batches of shrimp. Reasonable stocking can improve the commercial rate of autumn shrimp. 40,000 to 50,000 strong fry of 1.5-2 cm should be stocked per mu from late July to early August. If you buy fresh shrimp for self-breeding, you should choose strong, mature, and large shrimps over 5-6 cm from lakes or rivers from late June to early July, set up special ponds for seedlings, and wait until the shrimp fry grows to 1.5-2 cm. After 10-15 days of stocking fresh shrimp, 40-50 silver carp of 50-100 grams per tail should be stocked per mu. -

4. Do a good job in water quality management

The water level of the pond is about 60 cm in spring, 1.2-1.5 meters in summer, about 80 cm in autumn, and 1.5 meters in winter. The water transparency is regulated at 25 cm in the early stage of breeding, 30 cm in the middle stage, and 35 cm in the late stage. The dissolved oxygen is not less than 5 mg/L. In the early stage, fertilization is mainly used to cultivate biological bait. In the middle stage, water is regularly injected. In the late stage, water is frequently changed to prevent water aging and promote the molting and growth of shrimp. At the same time, quicklime is sprinkled every 15-20 days to increase the pH value and increase the calcium ions in the water, and the pH value is maintained between 7-8. Regularly use photosynthetic bacteria biological agents to improve water quality and bottom quality.

5. Pay attention to feed quality and feed scientifically

Freshwater shrimps are omnivorous. There are two peak feeding periods in a year, namely April-May and August-October. Freshwater shrimps are best raised with pellet feeds, and animal feed should account for more than 30%. Freshwater shrimps like to forage along the pond edge at night. You can observe their feeding. Generally, they are fed twice a day, with the morning feeding accounting for 1/3 of the total daily feeding amount, and the evening feeding accounting for 2/3.

6. Strictly control diseases

Start by cleaning the pond, clean the pond well, select the right species, maintain the water well, feed the right materials, and do a good job of preventing diseases at all levels. Once a disease occurs, timely measures must be taken to improve the water quality and prescribe the right medicine. When treating the disease, you must pay attention to the use of drugs that are sensitive to fresh shrimp. It is strictly forbidden to change the water or flush the water when the shrimp is molting, otherwise it will cause a large number of molting shrimp to die.

The above are some key points about shrimp farming. I hope it will be helpful to everyone.

Freshwater shrimp farming: First, strengthen water quality control. Generally, in late October, freshwater shrimp farming ponds need to be fertilized in autumn to ensure adequate nutrition.

The pond culture of fresh shrimps requires that the pond bottom is free of silt, the water source is sufficient, the water quality is fresh, there is no pollution, the water intake and drainage are convenient, and it meets the national standards for fishery water. The best time to feed is usually 5 pm. When feeding, sufficient bait can be evenly spread around the shrimp pond to prevent the fresh shrimps from killing each other due to hunger.

In the process of breeding freshwater shrimp, you should first choose a pond with relatively stable water flow, monitor the water source reasonably, and pay attention to reasonable feeding.