How to raise wild river shrimp and how to raise small river shrimp at home

It is better to polyculture with a variety of wild fish and loach in symbiosis, the average water level should reach 1 meter, the area is small, the water quality should be good, the shrimp are particularly sensitive to pesticides, and there are gentle slopes, stones, and aquatic weeds by the pond. There is also a very important point: get the wild shrimp fry, fish fry and so on do not immediately go to the pond, with a large pot, preferably an old wooden basin, loaded with clean and pollution-free water (it is best to prepare the water to be farmed), with an aeration pump into sufficient air, (oxygen density can be very large) the shrimp, fish fry raised for 1-3 days, the water is mixed to change, in order to restore physical strength, pick out the wounded, sick, residual seedlings, during the aeration pump must not stop, will cause a large number of deaths.

When the shrimp fry return to normal and are alive, dip the shrimp into the fish pond with a basin to let the shrimp swim out automatically, and pick out the poor physical strength. Small river shrimp can be fed feeds such as bloodworms or patches of feed.

The domestic cultivation method of small river shrimp is as follows:

Tools Ingredients: Shrimp Tank Core Hehe, Stones, Aquatic Plants, River Water.

1. According to the number of shrimp, prepare a larger shrimp tank to give the shrimp enough space to move, and add stones and other items at the bottom of the shrimp tank for the shrimp to hide.

2. The caught small river shrimp are first placed in a pot and used for transitional feeding with river water. Do not directly use tap water to raise small river shrimp, tap water contains chlorine and disinfectants, it is impossible to feed small river shrimp.

3. Place the shrimp tank in a cool and ventilated place to avoid direct sunlight. Breeders also need to put some aquatic weeds and green moss in the water for small river shrimp to eat.

4. Control the water temperature and control the water temperature at about 25 degrees. Appropriate water temperature control will increase the food intake and activity of small river shrimp.

5. Maintain excellent water quality, change a quarter of the water for the river shrimp every other week, and keep the water quality clean, which is of great help to the growth of the river shrimp.

When cultivating river shrimp, it is necessary to build a shrimp pond of the right size, and the depth is about two meters. The substrate at the bottom can be a mixture of sandy and silty soil, but less silt. Before putting the shrimp seedlings, the shrimp pond should be disinfected to ensure sterility.

When putting it, the density should be controlled, not too dense. If conditions permit, oxygenation can be increased with the help of an aerator.

The diet of river shrimp is very mixed, from the larval stage to adult shrimp zooplankton, algae, cladopods, copepods, small aquatic insects, organic detritus, filamentous algae sessile algae, small invertebrates, etc., but they prefer animal feed.

Compound feed can be used under artificial breeding conditions, and it especially likes to eat snail meat, earthworms, small trash fish, fly maggots, silkworm pupae and other animal feed, so it is better to add some animal feed appropriately in the breeding process.

The shrimp pond culture technology was introduced from the aspects of pond conditions, pre-stocking preparation, seed stocking, feeding, daily management, disease prevention and control, and waterlogging to provide reference for water farmers.

The scientific name of the green shrimp is the Japanese giant river prawn, which is mainly found in the freshwater waters of China and Japan. In recent years, all parts of our county have set off a pond breeding shrimp fever, but due to the lack of technology, the benefits are not obvious. After years of experiments and explorations, the author has summarized a set of shrimp pond culture technology in practice, which is introduced as follows.

1. Pond conditions.

The area of the shrimp breeding pond is the best, the water depth is about and around, and the pond ridge should have a certain slope, and the slope ratio is usually 1. The water source should be alive, so that it is convenient for drainage and irrigation, there are aquatic plants, and the pond silt is about 10cm. Each pond is equipped with an aerator, generally equipped with 1 aerator, and the inlet and drainage outlets should be covered with dense mesh or double-layer sieve silk to prevent predators and wild trash fish and discharged eggs from entering the pond.

1. Water source conditions.

The water source is sufficient, the water quality is fresh, the drainage and irrigation are convenient, the dissolved oxygen in the pool water is more than 5 milliliters, the pH value, the transparency is 25 40 cm, and the nitrogen nitrate (NO3-, NO2-) and hydrogen sulfide (H2S) can not be detected; Non-ionic ammonia milligram liters.

2. Pond conditions.

The shrimp pond is rectangular, east-west, loam or clay, the bottom of the pond is flat, and the silt is less than 15 cm; The length-width ratio is 3 1 4 1, the slope ratio of the ridge is 1 3 1 4, the area is 3 7 acres, and the pool can store meters; The inlet and drainage outlets are provided with a filter screen made of 60 80 mesh mesh, and a water pump or aerator is erected.

3. Water injection and fertilization.

5 10 days before the stocking of shrimp seedlings, the pond is filled with 50 80 cm of water, and the water is filtered with a mesh of more than 60 meshes; According to the change of pond water quality concentration, the composting method was used to apply decomposed organic fertilizer (i.e., the fertilizer was stacked in the shallow water at the four corners of the pond), with a dosage of 50-100 kg per mu, so as to cultivate plankton and provide abundant bait for juvenile shrimp.

1. Feeding containers. River shrimp can be raised in plastic pots or stainless steel basins, if possible, they can be raised in fish sock base tanks, and at the same time put an appropriate amount of aquatic plants and fine sand in them to simulate the original living environment of river shrimp as much as possible.

2. Water for aquaculture. Try to use clean river water or pond water, if you want to use tap water, you need to leave it in the sun to dry for about 1-2 days to remove the chlorine in the tap water.

3. Feeding. When the food is almost eaten before feeding, and the amount of food should not be too much at a time, try to feed less frequently. The food can choose rice grains, steamed bread crumbs, bread crumbs, etc.

4. Management. A small motor can be placed in the water to simulate the flow of river water. Replace the water with new water every once in a while (at least once every 7 days) to ensure that the water quality is clean.

The feeding container should be placed in a ventilated and cool place, not in the sun. The water temperature control grip is about 25.

5. If it is a family breeding of wild river shrimp, about two-thirds of the water can be added to the fish tank.

6. If it is artificially cultivated river shrimp, in the early stage, the water depth is controlled around the right. In the middle of the period, the depth of the water section is controlled to the left and right. In the later stage, the water depth is controlled to the left and right.

Water quality: When farming small river shrimp, try not to use tap water, you can prepare some river water before feeding, so that they can survive better.

Feeding location: Small river shrimp do not like sunlight, and when farming, they need to be placed in a shady position.

Water temperature: In order for the prawns to grow better, the water temperature needs to be kept at around 25.

The body length of small river shrimp is generally between 3-8 cm when they grow up, and they are distributed in the wild waters of our country, but their body size is also different in different living environments. If they live in a comfortable environment and have plenty of food, they can also reach a size of 5-8 cm. If they live in polluted waters, they can also die early.

In the wild, small river shrimp live in aquatic grasses, and in winter, they will enter burrows or rocks to reduce their consumption and survive the winter safely.

1. Hong Kong maintenance method.

Hong Kong culture is the traditional way of breeding in China, the breeding area ranges from more than ten hectares to hundreds of hectares, generally according to the natural topography of the intertidal zone of the sea area to build a dam enclosure, and the breeding equipment is simple.

In aquaculture, it generally relies on natural seedlings, and can also be put into industrial seedlings, but it does not fertilize or feed, and completely relies on natural productivity to provide products.

Its product categories include fish, crabs, shrimps, shellfish, etc., and the types of artificial seedlings put into the single species can also produce more than ten kilograms per mu, and the comprehensive (mu) benefits can reach hundreds of yuan.

Hong Kong culture is a breeding method that is worth advocating and developing. Especially in recent years, there has been a serious outbreak of shrimp disease and serious eutrophication in the coastal waters, which shows the great advantages of this method.

2. Semi-intensive farming.

It is developed on the basis of Hong Kong maintenance. That is, to build an ecological environment suitable for the survival and growth of shrimp, so that shrimp can obtain higher yields.

The establishment of the ecological environment includes artificial control of water temperature, salinity, transparency, substrate, water depth and predator organisms, so that it is in the most suitable environment for shrimp needs, and then through reasonable seedling, supplemented by feeding, higher yields can be obtained.

Due to the less bait and less organic matter in shrimp farming wastewater, this method has little adverse impact on the environment and can achieve high economic benefits. Therefore, it is also a breeding method worth promoting.

3. Intensive cultivation method.

This method is generally used in smaller ponds. Shrimp farming in this way requires good pond conditions, high water exchange rate, aeration equipment, complete facilities, artificial high-quality bait, and high seedling volume per unit area.

As long as the environmental control is reasonable and the feeding is reasonable, a higher yield can generally be obtained. The yield per mu of intensive farming in China is up to 1050 kg, and the benefits are also very high.

However, this method requires a lot of funds, a large investment, a large risk, a high bait coefficient, and a serious environmental pollution. Therefore, from the perspective of long-term benefits, large-scale promotion should not be advocated.

4. Polyculture.

Polyculture refers to the stocking of other fish, shellfish, algae, crabs and other species while raising shrimp, and the aquaculture products include shrimp and polyculture species.

In principle, the selection of polyculture species is not predatory to shrimp, does not affect the survival and growth of shrimp, does not compete with shrimp for food or has weak ability to compete for food, preferably omnivorous or scavenging, and can use shrimp residues.

Through polyculture, it can improve the utilization rate of bait, reduce the organic pollution of shrimp farming wastewater, improve production and increase economic benefits, and also reduce the risk of monoculture shrimp disease and extinction.

5. Other ways.

There are also a variety of breeding methods, such as intensive shrimp farming, net enclosure shrimp farming, cage shrimp farming, etc. These breeding methods are rarely used in China.

1. Shrimp pond treatment, river shrimp has high requirements for water quality, and it is required to stay away from industrial wastewater pollution sources, and shrimp ponds are best built in a location with good lighting. A shrimp pond is about 3 acres wide, 2 meters deep is appropriate, the bottom is sandy, less silt, and the inlet and drainage outlet should be laid with a dense net of centimeter size, so as to prevent escape and prevent the invasion of wild miscellaneous fish outside the pond. After selecting the orientation and specifications, the shrimp pond should be disinfected.

It is recommended to apply 75 100 kg of quicklime per mu for disinfection half a month before the seedlings are released.

2. Bait preparation, 1 week before the stocking of shrimp seedlings, filter with 60 80 mesh sieve silk net, 30 cm of water, apply 50 kg of base fertilizer (fermented animal manure) or 5 kg of urea per mu to cultivate the basic bait, pay attention to keep the transparency of the pool water at about 30 cm.

3. Shrimp seedlings stocking, after the preliminary work is ready, you can stocking shrimp seedlings, and the most critical thing for stocking is density control. In general, taking a pond with a water depth of 2 meters as an example, assuming that the planned yield is to reach 80 kg, then it is recommended to stock 80,000 shrimp seedlings per mu. Of course, if the pond conditions are good and equipped with an aerator, the stocking density can be increased appropriately.

4. Feed feeding, green shrimp have miscellaneous diets, and it is best to feed full-price broken granular bait within 1 month of artificial breeding of shrimp seedlings in the pond. In the first half of the month, kilograms are fed per mu every day, and kilograms are fed in the second half of the month, at 7 8 o'clock in the morning and 5 6 o'clock in the afternoon, and the feeding ratio in the morning is about 35 of the total daily amount of feeding, and 65 in the afternoon. When casting bait, it should be evenly scattered around the edge of the pond, and only a small amount should be placed in the middle of the pond.

5. Daily management, change the water by 20 30 cm every 2 3 days in the high temperature season. Every half month or so, 5 10 kg of quicklime slurry per mu is sprinkled in the whole pool, which not only improves water quality and substrate, but also sterilizes and promotes the growth of hulling, 8 October, the amount of green shrimp storage pond increases sharply, and the climate is changeable season, it is easy to occur hypoxic floating head, it is necessary to strengthen the patrol pond, add water in time or start the oxygen. After stopping eating in winter, it is necessary to add water and appropriate fertilizer regularly to control the water quality and water level to reduce the occurrence of moss and black-shell shrimp.