Artificial Culture method of River Shrimp Water quality cultivation is the key

Raise shrimp

Wild-caught river shrimp (green shrimp) can be cultured artificially. There are two ways of culture, one is to capture shrimp directly for cultivation, and the other is to capture shrimp with eggs and put them into a pond to naturally lay eggs and hatch larvae in the pond, and then cultivate them into shrimp for culture. The points for attention to be developed here are as follows:

1. Environmental conditions for aquaculture: the water used for shrimp culture must meet the water quality standards of fishery waters, and there must be enough oxygen in the water. 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. However, under the condition of artificial culture, green shrimp can also be eaten during the day.

2. the feeding habits of green shrimp are very miscellaneous, 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.

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 green prawns, the peak of spawning in late spring and early summer, which is formed by the spawning of old shrimp after overwintering, and the peak of autumn reproduction is formed by some of the first generation of young shrimp in that 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 carry out overall arrangement, and give full play to the advantage that green 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. The hatched larvae are cultured for 60 days, the body length can reach 2.5ml 3cm, and some of the female shrimps are mature, and the male shrimps can reach 4ml 5cm from October to 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 green shrimp culture, it is best to be divided into two stages, 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 shrimps with a body length of about 1ml / 2cm, large shrimps with a body length of more than 3cm-adult shrimp. Graded culture can also improve the survival rate of culture.

7. Reasonable stocking: shrimp seedlings are usually released from mid-June to mid-July every year, with 60,000 to 80,000 per mu; if the number of shrimp is released, the number can be reduced appropriately. If mixed culture of fish and shrimp is carried out, there are 15000 shrimp species of about 2 cm per mu from the middle of July to the middle of August every year. If you put egg-holding shrimp culture, then put egg-holding shrimp 25fu 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 fish species of the same year should be stocked in adult shrimp ponds in the middle of breeding).

8. Fishing: the main fishing methods are ground cage, shrimp, copying, or repelling of aquatic plants by the pond. Generally, rotation fishing will begin in September, and commercial shrimps of more than 4.5 centimeters will be caught and listed one after another.