Pelophylax ridibundus

Structure Transformation of the Anuran Amphibian Spawning Communities in Floodplain Lakes of the Medveditsa River Valley (Saratov Region) under Conditions of Long-Term Reduction of Water Content

Authors: Yermokhin M. V., Ivanov G. A., Tabachishin V. G.

The structure of spawning taxocenoses of anuran amphibians in five floodplain lakes of the Medveditsa river valley in 2009-2018 is analysed. Two near-terrace lakes (Lebyazhye and Koblovo) and three lakes of the central floodplain (Sadok, Kruglen’koye, and Cherepashie) were used as model ones. The degradation of the populations of the three most numerous species, a decrease in the dominance degree of the common spadefoot toad were established.

LEUKOCYTIC INDICES AND MICRONUCLEUS IN ERYTHROCYTES AS POPULATION MARKERS OF THE IMMUNE STATUS OF PELOPHYLAX RIDIBUNDUS (PALLAS, 1771) (AMPHIBIA: RANIDAE) LIVING IN VARIOUS BIOTOPIC CONDITIONS

Authors: Romavova E. B., Shapovalova K. V., Ryabinina E. S., Gelashvili D. B.

A differentiated assessment of blood cells and micronucleus species in the erythrocytes of marsh frogs (Pelophylax ridibundus) living in reservoirs of the Nizhniy Novgorod region and differing by origin, morphology and chemical composition was performed. Specific abiotic conditions (a peat bog) and anthropogenic load led to the most expressed change of the leukocyte composition of the blood, corresponding to the neutrophilic type of leukemoid reaction and an increased fraction of micronucleus in the erythrocytes.