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» Turizmus, idegenforgalom » Tanösvények » Péteri-tó - Vöcsök tanösvény » Víz, víz, tiszta víz
Víz, víz, tiszta víz
Water, Water, Clean Water
The lake’s clear waters create prime conditions for rich aquatic flora and fauna. Insect larvae, tiny crustaceans, aquatic snails and worms provide an important source of food for the newts, fish and birds in the canal and lakes. The highly protected European weather loach (Misgurnis fossilis) seeks nourishment in the mud. Salamanders such as the Danube crested newt (Triturus dobrogicus) and smooth newt (Lissotriton vulgaris) emerge in the spring and autumn. Frog species are also plentiful, for example: the European fire-bellied toad (Bombina bombina), European tree frog (Hyla arborea), European green toad (Bufo viridis), moor frog (Rana arvalis), agile frog (Rana dalmatina) and common spadefoot (Pelobates fuscus). The European pond turtle (Emys orbicularis) may be spied sunbathing in reeds or the tussock sedge (Carex stricta). Grebes, herons, cormorants and otters hunt for fish in these waters. This rich biodiversity is threatened by human impacts such as significant conversion of habitats, afforestation of arable lands, fertiliser and chemical run-off, and the decline of traditional homestead farming and grazing methods.
Interesting Facts
Not so long ago, when a substantial part of the Great Hungarian Plain was covered with swamps, traditional marsh fishing utilising basket traps was common. This practice disappeared along with the large marshes. The European weather loach can grow up to 30-40 cm in length. The fish was once the essential ingredient in the now all but unknown dish of weather roach cabbage. The hardy fish is also able to live in oxygen-depleted water because of its ability to swallow atmospheric air and pass it through the gut, extracting oxygen internally and not just from the water. Fishermen utilised this property by clearing a small patch in the dense vegetation and placing a tightly woven wicker basket trap in the centre. The elevated level of dissolved oxygen in the water filling the basket drew large numbers of fish. It is not by accident that such fish traps came to be known as “loach mines.” The loach was so well regarded for it weather forecasting abilities, that in English it is called the “weatherman” fish. The Pákász people swore that these fish could forecast a storm approaching one day in advance. The superstition was not unfounded. Actually, the fish have an extra highly vascularised intestinal respiratory organ through which it is able to exploit swallowed oxygen. Scientific literature refers to this as an “intestinal lung,” and it happens to be highly sensitive to changes in air pressure. According to historical records, when weather loach would sense an approaching storm, masses of them would gather near the water surface in such numbers that they would completely churn up the mud. The European weather loach is the only domestic fish species that is capable of withstanding periodic dry spells and survive by hibernating in moist mud for weeks at a time.
2016. 03. 16. Oldal nyomtatása
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