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Comparative assessment of the impact of pesticide pollution on the cytomorphology of erythrocytes Bufotes viridis (Laurenti, 1768) and Pelophylax ridibundus (Pallas, 1771) (Anura, Amphibia)

Authors: Rabadanova A. I., Gamidova D. M.

A comparative assessment of morphological features of erythrocytes Pelophylax ridibundus (Pallas, 1771) and Bufotes viridis (Laurenti, 1768) living near the territory sprayed with pesticides was carried out. Multidirectional changes in the parameters of erythrocytes in the compared species were revealed, expressed in an increase in the width, area and volume of cells in P. ridibundus and a decrease in the values of these parameters in B. viridis.

Variation of age composition and postmetamorphic growth rates in Pelophylax ridibundus (Ranidae, Anura): Comparison populations from Moscow region and Kamchatka

Authors: Lyapkov S. M., Bryakova M. A.

Using skeletochronology, the age composition and growth rates of Pelophylax ridibundus population from the Eastern European part of the native range (Zvenigorod Biological station (ZBS) of Lomonosov Moscow State University, Moscow region) were compared with introduced populations of Kamchatka, differing in the duration of the activity season (T). Both females and males of the ZBS population (T = 5.5 months) reach maturity after the 3rd wintering.

Influence of the geochemical background of the Western Caspian region of Azerbaijan on acid-base balance regulation of Pelophylax ridibundus (Pallas, 1771) (Amphibia, Ranidae) blood

Authors: Vershinin V. L., Vershinina S. D., Gasimova G. A.

This research paper examines the influence geochemical specifics of habitats on acid base balance of marsh frog blood. An aquatic species, P. ridibundus, is surrounded throughout its entire life cycle by an aquatic environment, which ensures the free exchange of gases and ions across the entire surface of the body, thanks mainly to passive and active transport, which is easily realized in a significant volume.

Modelling the range dynamics of the marsh frog (Pelophylax ridibundus) (Ranidae, Amphibia) in Russia under alternative scenarios of global climate change

Authors: Petrosyan V. G., Osipov F. A., Bashinskiy I. V., Dergunova N. N., Bobrov V. V.

Predictive maps of the distribution of the marsh frog (Pelophylax ridibundus) in Russia under the conditions of global climate change up to 2100 are presented. It is shown that under the influence of global climate change, the range will expand and the centroid will shift to the north-east.

Hematological Indices of the Lake Frog Pelophylax ridibundus (Pallas, 1771) (Ranidae, Anura) Inhabiting Reservoirs in the Northwestern Ciscaucasia with Various Pollution Types

Authors: Peskova T. Y., Bachevskaya O. N., Plotnikov G. K.

The paper deals with hematological indices of lake frogs from two biotopes with different pollution types. The first biotope is the Chibi Canal, which receives water from rice bays, it is contaminated with pesticides. The second biotope is a reservoir near the old river-bed of the Kuban River near the forest park Krasny Kut. In both biotopes, no significant differences in the number of erythrocytes and hemoglobin in the blood of lake frogs were observed.

ON THE WINTER ACTIVITY OF MARSH FROG – PELOPHYLAX RIDIBUNDUS IN THE BALAKOVO NPS COOLING POND

Authors: Voronin M. Y., Yermokhin M. V.

Abnormal activity of Pelophylax ridibundus in the cooling pond of the Balakovo NPS (Saratov region) was detected during the winter period of 2003. The temperature range within which this activity was observed corresponds to that for the exit of individuals of this species from wintering during the spring period.