Under the condition of artificial culture, grass shrimp can eat all kinds of fish feed (rice bran, raw bran, bean cake, mussel meat, snail meat and fish), especially fermented feed such as distiller's grains. When the feed is insufficient, it will eat by itself. It has negative phototaxis to light, mostly lurks in the dark during the day and comes out to eat and move at night. Therefore, most of the feed is put in when it is dark.
Grass shrimp breeding method
The egg holding period of grass shrimp is about 20 days, and the color of shrimp eggs can range from black-green to gray-white. The newborn shrimp is 2 ~ 3mrn long, transparent, with stalks and movable eyes. The first and second legs are pincers, and the five pairs of legs have no external limbs. The abdominal limbs are complete, and the tail is round-tongued, but there is no tail limb. At this time, the structure of the brain, heart, hepatopancreas and other organs of the young shrimp has been relatively perfect, and it has strong living ability, and it can crawl under the water, swim and eat, and complete the metamorphosis process after molting for 2 ~ 3 times. Generally speaking, when the water temperature is 22 ~ 24℃, the whole metamorphosis process takes 5 ~ 6 days, and when the water temperature is 26℃, the metamorphosis process only takes 3 ~ 4 days. The body length of young shrimp increased from 2 ~ 3 mm to 3.5 ~ 3.8 mm.
Under certain circumstances (the female shrimp is frightened and the water quality changes suddenly), the female shrimp may kick off the eggs in the abdomen, or throw away all the eggs directly (the eggs are stuck on the swimming feet in the abdomen of the shrimp), or the female shrimp holding the eggs may die unexpectedly. At this time, if you don't want to give up the shrimp eggs, you can adopt artificial incubation: just take the shrimp eggs one by one from the mother and put them in a place where the water flows slowly and wait for the shrimp eggs to hatch.
Grass shrimp will hybridize with some ornamental shrimps such as cherry shrimp, fire shrimp, snowball shrimp, golden rice shrimp, etc. In fact, cherry shrimp and the like are purified from grass shrimp, and wild grass shrimp will also appear individuals similar to cherry shrimp and snowball shrimp in body color, so in essence, they are just different color expressions of the same shrimp. If they hybridize with grass shrimp, the offspring will lose the original purified and stable color. In order to ensure the quality of future generations in ornamental shrimp, please don't mix them.
Cultivation techniques of Macrobrachium nipponense
Macrobrachium macrobrachium is the main species of river shrimp, and they all belong to the family Hemibrachium, which are very similar in appearance, but quite different in taste and texture, so the market prices are also quite different.
Macrobrachium rosenbergii, also known as Macrobrachium nipponense, is the most important freshwater aquaculture species in the world. It is native to freshwater waters in tropical areas of Southeast Asia, and has been cultivated in many countries all over the world since its successful artificial breeding in the 1970s. This kind of shrimp needs to grow rapidly in the water temperature environment above 24℃. They are not only fishing objects, but also artificially cultured.
Grass shrimp eat residual bait, algae, humus, etc. You can buy shrimp feed to feed it. The amount should not be too large.
It likes aquatic plants and prefers safety. So it likes to hide in the hollow of the rockery.
Besides, if the shrimp is too big, it will eat fish!
Shrimp likes flowing water, so it's better to get a water pump. As for the newborn shrimps, they still have a little yolk and don't need to eat anything.