White shrimp in brackish and fresh water living in shallow sea, near the coast or near the estuary likes to live in sediment environment, and its salt tolerance is 6 ‰ ~ 30 ‰. In autumn, due to heavy rainfall, estuaries or coastal areas often turn into fresh water, but white shrimps can still live freely.
The brachypotheca brachypotheca lives in brackish fresh water near the estuary or near the shore, and can also grow and breed in fresh water in the lower reaches of rivers affected by tides. Because it has many feathery bristles on its appendages, it can swim in the water all the time. The beautiful white shrimp lives in fresh water all its life. White shrimp is omnivorous, feeding on organic debris, algae or zooplankton (such as cladocera, copepod, rotifer, etc.).
White shrimp has the habit of laying eggs continuously, and the egg-holding shrimp can lay eggs again soon after hatching. White shrimp with ridged tail is 50 ~ 90 mm long. In the Yangtze River estuary, when the water temperature rises to12 ~13℃ in late March, it begins to lay eggs, and the parent shrimps can still be seen holding eggs until 10.
Each female shrimp can lay more than 4000 eggs. Eggs can be hatched in more than ten days after laying, and the _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ White shrimps are 40 ~ 60 mm long, and their parents can be seen holding eggs in early April. Early summer is the peak period for spawning. Its egg diameter is large, each shrimp only produces more than 300 eggs, and metamorphosis can be completed after molting for three times.
The body length of brachypotheca brachypotheca is 30-50 mm, and the spawning period is late, and the spawning season is vigorous in midsummer, which can be extended to late autumn. White shrimp spawns a lot, grows fast, and has strong adaptability to the environment. The larvae hatched in spring can reach sexual maturity in autumn, and can form spawning groups. White shrimp usually grows all year round. In winter, it grows slowly with the decrease of water temperature, and then it accelerates again in the following spring when the water temperature rises again.
Extended data:
Precautions for fishing:
White shrimp is easy to die in the state of hypoxia. Generally, white shrimp fished from the sea or pond should be frozen, which is difficult to support and survive, and its muscles are red and white at high temperature. Pond-cultured white shrimps are easily infected when they get sick, so it is generally necessary to catch them in this case to reduce losses.
Baidu encyclopedia-white shrimp