Matters needing attention in stocking of River Shrimp seedlings

Many people like to eat shrimp in daily life, because everyone knows that it has a high protein content and a very delicious taste, so the market prospect of shrimp is very good. Let's get to know it with the editor.

Matters needing attention in stocking of River Shrimp seedlings

Paying attention to the matters of stocking of river shrimp is the key to improve the survival rate of stocking. The specific considerations are as follows:

First, through the removal of excessive silt, sun exposure and drug disinfection, it can improve the bottom of the pond, sterilize and disinfect and remove enemy damage. Quicklime is the best choice for pond cleaning drugs, because it can not only kill enemy organisms such as wild fish, parasites and pathogens, but also improve soil and water quality. To use bulk, undamp quicklime, it is best to buy it as you go. The dosage is generally about 100 kg, depending on the water level of the pool.

Second, river shrimp have high requirements for water quality, do not tolerate low oxygen environment, and are benthos with poor swimming ability, so they often like to move at the bottom of the pond or on the shore, so the pond should be close to the large and medium water surface, with sufficient water source and fresh water quality. If possible, the pH value, ammonia nitrogen and nitrite of the pond water can be detected to meet the requirements of culture water quality before the seedlings can enter the pond. After cleaning the pond into the water or usually into the drainage, it is necessary to use 40-60 mesh sieve filter to prevent enemy organisms from mixing into the pond. After entering the water, the water must be tested 2-3 days before the river shrimp seedlings are put into the pond to prevent the loss caused by pesticide residues.

Third, river shrimps like to grow in more fertile water, so it is necessary to put fertile water into the pond to avoid releasing seedlings in clear water. Fermented organic fertilizer 100kg / mu was applied 5 to 7 days before the shrimp seedlings went into the pond, so that there was enough natural bait when the shrimp seedlings went into the pond. If the transparency of the pond exceeds 40 cm, topdressing must be applied to ensure that the water quality is "fat, alive, tender and cool".

Fourth, the river shrimp seedlings put into the same shrimp pond require the same size, strong physique, disease-free and injury-free, intact limbs, good vitality, agile response and strong ability to reverse the water. Shrimp with eggs should be released at once, do not put in many times. The stocking time should be carried out in cloudy and rainy days and sunny days in the morning or evening to avoid high temperature and muggy heat. When stocking, increase oxygen first and then release seedlings.

Fifth, strictly abide by the principle of light shipment and express transportation. The temperature of shrimp fry is generally on the high side during transportation, so it should be shipped when the temperature is low in the morning and evening. Air-conditioned cars or ice cubes can be used for long-distance transportation to cool down, but attention must be paid to gradually rising and cooling to prevent the temperature difference from changing too much. When stocking, pay attention to the difference in water temperature should not be too large, you can put the nylon bag into the pond for 10-15 minutes, wait until the water temperature in the bag is basically the same as the water temperature of the pond before releasing seedlings into the pond.

Environmental conditions of culture

The water used for shrimp culture must meet the water quality standards of fishery waters, and the water must have enough oxygen. There are no large enemy organisms in the culture pond. The pond is 1.2 meters deep and 1.5 meters deep, with less silt at the bottom and hard sediment. Green shrimp is not good at swimming and has negative phototaxis, so it often lurks in dark gravel or water plants during the day, that is, it comes out at day and night to look for food, and most of the time it perches on the bottom of the water or water plants and other climbing objects, and likes to perch in the slow-flow shoals overgrown with water plants along the coast, so it is necessary to have a sufficient number of attachments for shrimp culture, which can grow water plants or hang nets by the pool. However, under the condition of artificial culture, green shrimp can also be eaten during the day.

What kind of food does river shrimp eat?

River shrimp are omnivorous animals, and the young shrimp feed on plankton. The main food of adult shrimp in natural waters is a variety of benthic small invertebrates, dead aquatic animals, fixed algae, a variety of filamentous algae, organic debris, plant fragments and so on. Farmed river shrimp can eat a variety of commercial feed, such as lees, bean curd dregs, bean cakes, silkworm pupae, clam meat, wheat flour, fish meal, rice, snails, especially maggot bows. When there is not enough feed, they will eat each other. Negative phototaxis to light, lurking in the shadows during the day, feeding and activities at night. Therefore, most of the feed is put into the dark.

The living habits of River Shrimp

The main results are as follows: 1. Macrobrachium rosenbergii is an omnivorous aquatic animal, which is partial to animal feed, and artificial breeding is mainly fed with commercial feed. The optimum water temperature for growth was 18-30 ℃. When the water temperature dropped to 4 ℃, it entered the overwintering stage. When the water temperature rose to more than 10 ℃, the activity and feeding increased gradually.

2. Camp benthic life, like to live in slow-flowing places overgrown with water and plants, with water depths ranging from 1-2 meters to 6-7 meters. In summer and autumn, river shrimp look for food and breed in the shallow water along the bank, and in winter they move to deeper water areas to survive the winter, with little feeding and activity.

3. The water temperature is 18 ℃. The sexually mature river shrimp begins to mate and spawn, and mating usually takes place near spawning.

4. River prawns are backlit, hiding in the dark during the day and coming out at night. The reproductive season is unusual, and during the day they also come out for mating activities, and when feeding, they also come out to compete for food during the day.

In the cultivation of river shrimp, first of all, we must understand the living habits of shrimp, the second is to master some shrimp culture techniques and matters needing attention, so that shrimp culture can be done better.