Wednesday, July 13, 2011

Lively ponds in the summer

About the middle of July in a small pond where water is especially warm and the nights are made longer, the algae have time at night to absorb as much oxygen, which, except for carp, carp and loach, many fish are beginning to feel a lack of oxygen. July - the worst of times for anglers. With the advent of the July heat, when the water becomes warm, palim, falls into this stupor - estivation. This nocturnal fish stops to go even at night, hiding in their burrows under the snags and clay banks. Many water flowering plants are now not only flourishing, but is already yielding seeds and fruits. Continue to breed malaria and other mosquitoes. New generations of aquatic snails. Coastal reeds and sedges, along with other spiders can catch a very interesting spider dolomeda with a large cocoon in the jaws. This is one of the largest in the middle lane of spiders, and perhaps only, except for the tarantula, which can pierce human skin. Dolomed - a distant relative of the tarantula, and little inferior to him in size, but its bite is less painful, though still resembles a wasp sting. In mid-summer it can be seen not only in the sedge, but also on the leaves of water lilies and pondweed, and more young spiders are able to cross right over the water like a pond skater. Here they skillfully catch their prey, and in case of danger, hiding in the water down into it on the stems of aquatic plants. Eating various insects and their larvae dolomed and destroys mosquito larvae. This spider with spider-dropsy should be considered a useful animal. In the second half of summer, the female lays dolomeda more than a hundred eggs, arranging for them to spherical cocoon sizes larger than hazelnut. From this cocoon of the female does not leave, day or night. She moved with him into the thicket of sedge, cattails or willows and the waterfront is dogging him for about two decades, until the eggs are not released pauchata. Spider twist around the stems at the nearest dense network of web and continues to protect the large brood for several days. When pauchata get stronger, the mother leaves them and resume their hunt for the reservoir surface. Pauchata some time even climb the spider net, in which entangled small mosquitoes and gnats. Back in mid-July or even later can be seen in ponds, tadpoles of green frogs (pond and lake). While tadpoles grass and moor frog has long been turned into frogs and leave the ponds, tadpoles of green frogs are still swimming in the water. They are significantly larger than the first. Their tail is shortened gradually and very slowly. When he becomes a small tadpoles finally crawl onto land. Still later (in the first third of August) complete the development of tadpoles of newts, no earlier than the second third of August is the transformation of tadpoles of Bombina bombina. Even longer delayed development in spadefoot: its huge tadpoles occur in September, and some even hibernate.

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