In the history of biological invasion events have caused many ecological disasters, the International Organization for Conservation of Nature has published a list, the specific content is the 100 of the world's most destructive alien organisms, of which the species invaded china reached 51 species, making our country one of the most serious countries in the world by alien species invasion, the annual economic loss reached more than 200 billion yuan, after all, like crayfish such as alien species can be rationally used only a very small part.
Water hyacinth floods Dianchi Lake
Because of this, the customs for the inspection of foreign containers, express parcels, etc. has been very careful, just recently, Tianjin East Xinjiang customs inspectors found something unusual in a batch of imported container goods!
It turned out that these goods actually hid a spider with a red hourglass pattern, and there were many of them, and it was identified that this spider was not a good stubble, it was a kind of "Spider Spider", generally known as "Black Widow", just from the name you can see that it is a harmful alien species, so what is its danger? What harm does it do once an invasion occurs?
In fact, this is not the first time that the customs has detected the black widow spider, and here it is also thanks to the careful work of the customs personnel that this harmful alien species is blocked out of the country.
<h1 class="pgc-h-arrow-right" data-track="9" > let's get to know the Black Widow Spider. </h1>
Everyone is certainly not unfamiliar with spiders, especially those living in rural areas, once the room is not cleaned frequently, there will always be spider webs on the roof or in the foyer, but our common spiders are local, and most importantly, they are basically harmless.
But the black widow intercepted this time is very dangerous.
On the earth, there are many known species of spiders, which can be divided into 110 families, more than 3800 genera, and the specific species can reach more than 42,000 species, which can be said that the number of species is quite rare in the entire animal kingdom, and there are about 3800 species in our country.
Black widow spider belongs to the bulbous spider family, spider genus, the size of the entire spider world belongs to the medium, roughly 2 cm to 8 cm range, the body is roughly black, of which the abdomen also has a red spot pattern, this customs inspection can see that this is the initial basis for the black widow is to see its appearance. But it's not known for its size, but for its highly toxic.
<h1 class="pgc-h-arrow-right" data-track="10" > why is this spider called Black Widow? </h1>
It turns out that the female of this species of spider will bite the male mate immediately after mating with the male, hence the name "Black Widow". This process sounds cruel, so why should females bite male spiders?
In fact, this kind of thing is really not a unique case in the insect world, and experts have specifically named this process ""sexual food kind". This means the process by which such animals bite to death or even eat their companions after mating.
There are several reasons for this strange mechanism:
1. Animals that eat the same kind sacrifice the other side to provide adequate nutrition for the females in order to better hatch and grow for the next generation. In the wild, where living conditions are more difficult and food is scarce, such a cruel mechanism is in a sense the result of the natural evolution of this insect.
2, in this type of insect, the general female individual size is larger than the male. Because the professional institutions in the United States have observed that if such animals, males and females are about the same size, they will not be eaten, but the males will be eaten even smaller.
<h1 class="pgc-h-arrow-right" data-track="17" how poisonous is Black Widow >? </h1>
For human beings, the real danger is not the black widow's heart to eat her own kind of personality, but its own toxicity, in the world black widow bites and bites people and domestic animals also occur from time to time, so how poisonous is the black widow spider?
The venom of the Black Widow spider belongs to a neurotoxin that belongs to one of the most venomous spider species even within spider populations. Here you can compare it with a poisonous snake.
Among the venomous snakes, the rattlesnake is extremely venomous, but compared with the same dose of venom, the venom of the black widow spider is about ten times that of the rattlesnake, but the venomous snake is much larger than the black widow spider, and each time it attacks other animals, the venom released is much more heavy, and the rattlesnake is more poisonous.
<h1 class="pgc-h-arrow-right" data-track="22" > how terrible is Black Widow once invaded? </h1>
Black widow spider in addition to the toxicity, there is a more terrible feature, that is, the reproductive ability is super strong, about a lifetime can lay 5000 eggs, you have to know that the female black widow spider life expectancy is only two to three years, every two to three years to produce 5000 offspring, this reproductive ability is very terrible, once invaded, in the absence of natural enemies, will be in the wild breeding in large quantities, very affecting the safety of people in the wild environment.
Now in fact, there are already a few species of black widow spiders in our country, but in order to avoid more poisonous species of black widow spiders invading our country, it is still necessary to prohibit this animal from entering our national territory, and in recent years, in the customs inspection of various places, many black widow spiders have been intercepted.
Finally, I have to say that in fact, Xiaobian is also very confused, what is the purpose of these people who import black widow spiders? Why import this toxic alien species, and it is very likely to have a great adverse impact on the ecological environment of our country, I hope that both insect lovers and other people with any purpose will stop this behavior and put an end to the occurrence of similar biological invasions.