A glance at the frog’s skin can say what kind of blood the amphibia has, the blood composition accounting for frog’s capability to get on alongside human beings. The research by the Ural ecologists has been supported by the Russian Foundation for Basic Research.
The crucial importance for the frog is in the light strip on the back along the spinal column. V.L. Vershinin, Doctor of Biology, specialist of the Institute of Plant and Animal Ecology, Ural Branch of Russian Academy of Sciences, has discovered close correlation between availability of the strip, composition of its blood elements and frog’s capability to adapt to urban environment.
The amphibia, the first surface vertebrates, are extremely dependent on the environment. Nevertheless, they can bear all “delights” of urbanization: contaminated water bodies, piped brooks and massive asphalt pavement, so the researchers are trying to understand how the frogs can succeed in that. The blood, one of the most dynamic systems, is the quickest to react to any functional changes taking place in the organism. V.L. Vershinin started his effort from investigation of hematologic properties. In Ekaterinburg, the scientist has spent several years investigating the blood of three species of frogs: moorfrog (Rana arvalis), European common frog (Rana temporaria) and waterfrog (Rana ridibunda). Amphibia were caught within the first two weeks of surface life in the vicinity of water bodies, where tadpoles had developed. Depending on the level of man’s impact, the city was divided into four zones. The first zone, encumbered by multistorey blocks of flats, is almost deprived of lawns and water bodies, and the fourth zone – is a forest park, i.e. the recreaton zone of the citizens.
Sergey Komarov | alfa
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