What kind of food do river shrimp eat?

River shrimp, also known as green shrimp, is widely distributed in rivers, lakes, reservoirs and ponds in China. It has delicate meat, delicious taste and rich nutrition. It is an aquatic food with high protein and low fat, which is favored by consumers. It has the advantages of high fecundity, strong adaptability, wide eating habits, delicious meat taste, perennial listing and so on. Next, let's take a look at what kind of food river shrimp eat.

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.

Culture and Management of River Shrimp

1. The water used for river 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 water depth of the pond is 1.2 to 1.5 meters, the bottom silt should be less, and the sediment should be hard. River shrimp are not good at swimming and have negative phototaxis, so they often lurk in dark gravel or water plants during the day, that is, they come out to look for food at night, and they live on the bottom of the water or water plants most of the time. They like to live in the slow-flowing shoals overgrown with water plants along the coast, so they should have enough attachments to cultivate river shrimp, and they can grow water plants or hang nets by the pool. However, under the condition of artificial culture, river shrimp can also be eaten during the day.

2. River shrimp feed from larval stage to adult zooplankton, algae, Cladocera, copepod, small aquatic insects, organic detritus, filamentous algae, invertebrates and so on, but they like to eat animal feed. Compound feed can be used under the condition of artificial culture, especially animal feed such as clam meat, earthworms, small miscellaneous fish, fly maggots, silkworm pupa, etc., so it is better to add some animal feed in the process of culture.

3. After observation and investigation, the life span of river shrimp is generally only more than one year, and the longest is only a little more than 2 years (16-17 months for males and 26-27 months for females). Most people think that the river shrimps hatched from May to June will die one after another after finishing breeding in July and August of the following year. Many farmers put in dozens of kilograms of egg-holding shrimp in May and could not catch prawns by the end of the year. Therefore, when putting the egg-holding shrimp into culture, the prawns should be caught and listed in time after the shrimp has laid eggs.

4. There are two peaks in the spawning of river shrimp. The peak of spawning in late spring and early summer is formed by the spawning of the old shrimp after overwintering, and the peak of autumn reproduction is formed by some of the first generation of young shrimp in the same year. Therefore, we should decide whether to breed in autumn according to our own culture conditions and environment, and from the point of view of balanced listing and improving yield efficiency, we should plan as a whole and give full play to the advantage that river shrimp can survive the winter naturally.

5. If the culture starts from the larvae, the early water quality cultivation is the key, and a large number of zooplankton need to be cultivated with organic fertilizer to feed the larvae or young shrimp, so as to improve the survival rate of cultivation and culture. One to the shrimp stage can be fed with artificial feed or formula feed. After 50-60 days of culture, the hatched larvae generally reach 2.5-3 cm in length, and some female prawns are mature, and the male shrimp can reach 4-5 cm in October-November. Therefore, the shrimp should be caught and listed in time according to the growth of shrimp in the process of culture. The listing of large shrimp is beneficial to the growth of shrimp in the pond.

6. In order to improve the growth rate and pond size of river shrimp culture, it is best to divide into two-stage culture, that is, from larvae to 1Mel 2cm shrimp species, to shrimp culture to adult shrimp. If possible, three-stage culture can be carried out, that is, larvae-small shrimp species with a body length of about 1 cm to 2 cm, large shrimp species with a body length of more than 3 cm-adult shrimp. Graded culture can also improve the survival rate of culture.

7. Monoculture river shrimp is usually released from the middle of June to the middle of July every year, with 60 ~ 80,000 shrimp per mu, and the number of shrimp can be reduced appropriately. If mixed culture of fish and shrimp is carried out, 15000 shrimp species of about 2 cm per mu will be put in every year from the middle of July to the middle of August. If you put egg-holding shrimp culture, then put egg-holding shrimp 25kg 30 jin per mu. In the second year, you may consider double-season pond (two recommended) farming. In addition, silver carp summer flowers or fish species should be raised in shrimp ponds (1000-1500 larger fish species should be released in adult shrimp ponds in the middle of breeding).

8. The main fishing methods of river shrimp are ground cage net, shrimp fish, copying net, or driving out water and grass by the pond. Generally, rotation fishing will begin in September, and the catch will be as high as 4. Commercial shrimp of more than 5 centimeters have been caught and put on the market one after another.

Conclusion: if river shrimp are raised as pets, they can feed a lot of things, such as fish feed, boiled cabbage, frozen red worms, dead fish lice, submerged fish food, etc., eat everything, are not picky, and mainly eat algae in nature.