In ponds, small quiet lakes, slow rivulets it is possible to see scurrying about up-down, from under water to a reservoir surface, a mercury drop. By closer examination it turns out that vertical movements are made by a small spider, and a mercury droplet — his silvery paunch.
The diving bell was the first step on the way of the person to the underwater world with special equipment. This construction was a prototype of a space suit of the diver. The most ancient mentions of it are dated 1531. But the millennia earlier in the similar way the problem of stay under water was solved by a spider-argironet.
Surprising lodge of a spider-serebryanki
Silvery color of a spider — optical deception. Coloring at the argironet usual for the majority of spiders — black golovogrud and the brown paunch covered with a set of hairs. These hairs greased with a special secret at rise on a surface of a reservoir detain air. In addition on a tip of a paunch the tiny vial of air "caught" by means of web warts is transported.
It is tiny similarity of the diving bell created by the person. The nest attached to stalks of underwater plants by spider lines and weaved out of them reaching nut filbert size has an air reserve under a dome. The surprising spider tirelessly diving after the next portion of silvery bubbles is exempted from reserves of air and some time can be under water in the lodge. The surprising insect weaves a web of four types — for a nest bell, the threads holding a nest, lovchy grids and for an egg cocoon. Females build the nests with bigger diligence, than males.
Features of everyday life of argironet
The underwater environment delivers to serebryanka a plentiful table, small water inhabitants fall prey of dexterous predators. Sometimes they are fallen into clutches to the hunting spider, sometimes — get confused in web threads. Full argiront production suspends under a nest dome, having rolled up in a web cocoon, per unsuccessful days. Here, under water, the pauchiny posterity is removed. Having laid eggs, the female spider places them in the cocoon filled with air in a nest or near it, and protects a precious laying. The spider male who took part in fertilization of the girlfriend is not comprehended by a fate to be eaten by a female — the final characteristic of marriage traditions of the majority arakhnovy. He continues to live nearby, in the same underwater bell, with the same eating habits, with the same obligations for delivery of air.Spetsialisty-arakhnologi consider that among reasons for refusal of cannibalism — the sizes of a male. Argironeta are the only species of spiders with the male having the big sizes than a female — respectively 1.5 and 1.2 cm. By the way, larger males have the smaller sizes of nests. At a spider-serebryanki, the inhabitant of the European reservoirs, the closest relative in Japan is recently found. As it became clear, at the Japanese argironet which was earlier considered as a full analog European the bodies performing reproductive functions are much larger.