"Spring is here, and it's time for all things to recover!" Seeing this line, do you feel very familiar with it? Looking back at the student days, Teacher Zhao Zhongxiang's voice does not know how many summers have accompanied us. Today, Xiaobian will take you back to childhood and bring you a special edition of "Animal World".
Today, the protagonist of our "Animal World" is very popular recently, Li Jiaqi and Zhu Guangquan praised it, and Alibaba made a specific boarding pass for it Hubei net red food - crayfish.
As a food business card of Hubei and a well-known Internet celebrity food at home and abroad, crayfish has always been loved by the public, but everyone knows very little about crayfish. As an aquatic animal of the crustacean crustacean family, crayfish are also an indispensable member of nature and the animal kingdom, and they also have to experience natural selection, but also to withstand competitive pressure, but also to reproduce and age. Today, Xiaobian will take you to understand the crayfish we are familiar with from another perspective.
"Spring has arrived, everything is revived, the savannahs..." Oh no, it's time for animals to mate again in the rivers.
As an animal, crayfish, like every species in nature, is a must for reproduction. First of all, it should be clear that although there are many asexual reproductions in nature, crayfish, as an oviparous animal, need to mate to reproduce.
Speaking of mating, it comes to the problem of a male and female, most people know that crayfish are divided into male and female, but can everyone clearly distinguish male and female crayfish? Today Xiaobian will give you a little trick to identify the male and female of crayfish. In fact, the male and female crayfish are very good at distinguishing, mainly looking at the abdomen of the crayfish, the male crayfish abdomen has two hard calves, and the female does not.
The mating season of crayfish is very long, as long as the river temperature is between 15 ° C and 31 ° C to meet its reproductive requirements, so we can see the mating phenomenon of crayfish all year round. However, in general, the peak period of crayfish mating is generally around May to September, when the water temperature is suitable, and the shrimp can also hatch when the river is warm after production, which is conducive to the survival of shrimp that are still in the juvenile stage.
The most interesting and shocking thing about the reproduction of crayfish is that the mating success rate of crayfish is 100%. At first glance, do you think it is very surprising that in such a fierce and cruel nature, the mating success rate of crayfish is so high? The reason behind this, please listen to me slowly.
When it comes to mating success rates, we have to mention the mating method of crayfish. When the crayfish reach sexual maturity, the female shrimp lie on their backs, the male shrimp or lie on their sides or on their sides, clamp the female shrimp anterior claw with the claw foot, hold the female shrimp with the step foot to insert the adapter into the female, the male shrimp's calcium junction is connected with the female shrimp's seminal vesicle, and the male shrimp's sperm clip follows the junction into the seminal vesicle of the female shrimp. The mating time is about 10 to 30 minutes.
During the mating process, the influence of the outside world on the crayfish is minimal, and farmers can even catch the crayfish during the mating process, which will not affect the mating of the crayfish, which is the first reason for the high mating success rate of crayfish.
The second reason for the high mating success rate of crayfish is that the male shrimp is to incorporate the sperm pods into the nanocentrosacy of the female shrimp through the adapter, waiting for the mother shrimp egg to mature and release when fertilized, the sperm can survive in the nano seminal vesicle for 2 to 8 months, the male shrimp will store the sperm in the female shrimp nano seminal vesicle, for the use of the female shrimp when spawning, so the crayfish is first mated and then fertilized, and the fertilization success rate is greatly improved.
As a very large species in nature, crayfish is also closely related to our lives, through today's special edition of "Animal World", have you learned more interesting knowledge about crayfish? If you think this little popular science is very interesting, you may wish to click a recommendation to let more people know Oh ~ ~ ~