Generally speaking, the life span of male shrimp is 20 months and that of female shrimp is 24 months.
Production cycle
Sexually mature crayfish can only give birth once a year, and the incubation time is directly related to the water temperature.
So crayfish will produce 1-2 times in the whole life cycle.
Crayfish mature sexually every other year. In the natural environment, young shrimps that leave their mothers in September will not mature until July-August of the following year. Even under artificial feeding conditions, it takes about 6 months for crayfish seedlings to reach sexual maturity.
companion
The mating season of crayfish is generally from late April to July, and the peak of group mating is in May. When the water temperature is above 15℃, crayfish begin to mate, and the young shrimp gradually hatch after September. The young shrimps are generally attached to the abdominal swimming feet of the mother shrimps, and the growth and development process in the larval stage is completed under the protection of the mother.
Incubation process
In the natural state, the parent shrimp begin to dig holes after mating, and most of the processes of female shrimp laying eggs and hatching fertilized eggs are completed in the caves.
Crayfish can lay eggs 3-4 times a year, each time 100-500. The number of eggs laid by female crayfish increases with the increase of individual length. It takes about 7-40 days for crayfish females to mate, and the females begin to lay eggs. When laying eggs, the eggs of the female shrimp are discharged from the reproductive pores and combined with the sperm released by the sperm pods to form fertilized eggs. The fertilized eggs are attached to the abdomen of the female shrimp, and the abdomen and feet of the female shrimp keep swinging to ensure the oxygen needed for the fertilized eggs to hatch.
incubation period
The incubation time of fertilized eggs is directly related to the water temperature, and also affected by dissolved oxygen, water quality and bait in the pond. The higher the water temperature, the shorter the incubation time, and most fertilized eggs hatch in autumn. At this time, the environmental temperature gradually decreases, which will affect the incubation time, and some fertilized eggs will not hatch until the next spring.
Understanding the breeding habits of crayfish is helpful for farmers to choose the right time to release shrimps. Generally speaking, it is recommended to put the seed shrimp in June-August every year, and if the egg shrimp is put in, it should not be later than the end of September. It is of no practical significance to release shrimp or shrimp with eggs after June 65438+ 10.